Best Hardware for GPU Rendering in Octane – Redshift – Vray (Updated)

Last updated on December 9th, 2018, 78 comments

Graphics Card (GPU) based render engines such as Redhift3D, Octane or VRAY-RT have matured quite a bit over the last years and are starting to overtake CPU-based Render-Engines.

But what hardware gives the best-bang-for-the-buck and what do you have to keep in mind when building your GPU-Workstation compared to a CPU Rendering Workstation? Building a 3D Modeling and CPU Rendering Workstation can be somewhat straightforward, but highly optimizing for GPU Rendering is a whole other story.

So what is the best Hardware and best GPU for rendering with Octane, Redhsift3D or VRAY-RT, that also is affordable? Let’s take a look:


Since GPU-Render Engines use the GPU to render, technically you should go for a max-core-clock CPU like the Intel i7 8700K that clocks at 3,7GHz (4,7Ghz Turbo) or the Intel i7 8086K that clocks at 4Ghz (5Ghz Turbo).

That said though, there is another factor to consider when choosing a CPU: PCIE-Lanes.

GPUs are attached to the CPU via PCIE-Lanes on the motherboard. Different CPUs support different amounts of PCIE-Lanes and Top-tier GPUs usually need 16x PCIE 3.0 Lanes to run at full performance.

The i7 8700K/8086K have 16 PCIE-Lanes, meaning you could use only one GPU at full speed with these type of CPUs. If you want more than one GPU at full speed you would need a different CPU that supports more PCIE-Lanes like the AMD Threadripper CPUs, that have 64 PCIE-Lanes, the i9 7800X (28 PCIE-Lanes) or the i9 7900X Series CPUs that support 44 PCIE-Lanes.

GPUs, though, can also run in lower speed modes such as 8x PCIE 3.0 Speeds and then also use up less PCIE-Lanes (8x). Usually there is a negligible difference in Rendering Speed when having GPUs run in 8x mode instead of 16x mode.

This would mean you could run 2x GPUs on an i7 8700K in 8x PCIE mode, 3x GPUs on an i9 7800X and 5x GPUs on an i9 7900X. (Given the Mainboard supports this configuration) High PCIE-Lanes CPUs are usually also great for CPU Rendering as they tend to have more cores.

PCIE_Lanes Compariosn

When actively rendering and your scene has been loaded into the GPU VRAM, it fits nicely in there and nothing has to be swapped out of core, GPU renderers are of course mainly dependent on GPU performance.

Some processes though that happen before and during rendering rely heavily on the performance of the CPU, Hard-Drive and network.

For example extracting and preparing Mesh Data to be used by the GPU, loading textures from your Hard-Drive and preparing the scene data.

In very complex scenes, these processing stages will take lots of time and can bottleneck the overall rendering speed, if a low-end CPU, Disk and RAM are employed.

If your scene is too large for your GPU memory, the GPU renderer will need to access your System RAM or even swap to disk, which will considerably slow down the rendering.

Best Graphics Card for Rendering

To use Octane and Redshift you will need a GPU that has CUDA-Cores, meaning you will need a NVIDIA GPU. VRAY-RT additionally supports OpenCL meaning you could use an AMD card here.

The best bang-for-the-buck NVIDIA cards are 1070 GTX (1920 Cuda CUDA , 8GB VRAM), 1080 GTX (2560 CUDA Cores, 8GB VRAM) and the 1080 Ti (3584 CUDA Cores, 11GB VRAM).

On the high-end, the currently highest possible performance is offered by the NVIDIA Quadro P6000, that also comes with 24GB of Video RAM. This Card though has horrible Performance per Dollar (Check the tables further down).

NVIDIAs new Volta architecture, that is being released for consumers soon, will top this performance even more. Note though, that the Render Engines you are using will have to be updated in Order to use the New CUDA 9 Architecture these Volta Cards run on.

GPUs, that have 12GB Video RAM and more, can handle high-poly scenes with over 200 million unique objects best. Take a look at the performance per dollar tables below, though, to get an overview of how expensive some of these cards can get without offering that much more performance.

GPU Cooling

Founders Edition Blower Style Cooler

  • PRO: Better Cooling when stacking more than one card
  • CON: Louder than Custom Partner Card Cooling

Custom Partner Cooling

  • PRO: Quieter than Blower Style, Cheaper
  • CON: Worse Cooling when stacking cards

Hybrid Cooling

  • PRO: Best All-In-One Cooling for stacking cards
  • CON: More Expensive, needs room for radiators in Case


  • PRO: Best temps when stacking cards, Quiet
  • CON: Needs lots of extra room in the case for tank and radiators, More Expensive

NVIDIA GPUs have a Boosting Technology, that automatically overclocks your GPU to a certain degree, as long as it stays within predefined temperature limits. So making sure a GPU stays as cool as possible, will improve the performance.

You can see this effect especially in Laptops, where there is usually not much room for cooling, and the GPUs tend to get very hot and loud. So if you are thinking of Rendering on a Laptop, keep this in mind.

Power Supply

Be sure to get a strong enough Power supply for your system. Most Cards have a TDP of around 180-250W. CPU of around 100W and any additional Hardware in your case.

I Recommend a 500W for a One-GPU-Build. Add 250W for every additional GPU. Good PSU manufacturers to look out for are beQuiet, Seasonic and Coolermaster (among others)

Mainboard & PCIE-Lanes

Make sure the Mainboard has the desired amount of PCIE-Lanes and does not share Lanes with Sata or M.2 slots. Also be careful what PCI-E Configurations the Motherboard supports. Some have 3 or 4 PCI-E Slots, but only support one x16 PCI-E Card.

This can get quite confusing. Check the Motherboard manufacturers Website to be sure the Card configuration you are aiming for is supported. Here is what you should be looking for in the Motherboard specifications:

Asus Rampage PCIE Lane Config

In the above example you would be able to use (with a 40 pcie Lane CPU) 1 GPU in x16 mode. OR 2 GPUs in both x16 mode OR 3 GPUs one in x16 mode and two of those in x8 mode and so on. Beware that 28 pcie Lanes CPUs in this example would support different GPU configurations than the 40 lane CPU.

Currently the AMD Threadripper CPUs will give you 64 PCIE Lanes to hook your GPUs up to, if you want more you will have to go the multi-CPU route with Intel Xeons.

To confuse things a bit more, some Mainboards do offer four x16 GPUs (needs 64 PCIE-Lanes) on CPUs with only 44 PCIELanes. How is this even possible?

Enter PLX Chips. On some motherboards these chips serve as a type of switch, managing your PCIE-Lanes and leads the CPU to believe fewer Lanes are being used. This way, you can use e.g. 32 PCIE-Lanes with a 16 PCIE-Lane CPU or 64 PCIE-Lanes on a 44 Lane CPU. Beware though, only a few Motherboards have these PLX Chips. The Asus WS X299 Sage is one of them, allowing up to 7 GPUs to be used at 8x speed with a 44 Lane CPU, or even 4 x16 GPUs on a 44 Lanes CPU.

This screenshot of the Asus WS X299 Sage Manual clearly states what type of GPU-Configurations are supported (Always check the manual before buying expensive stuff):

Asus WS X299 Sage

PCIE-Lane Conclusion: For Multi-Gpu Setups, having a CPU with lots of PCIE-Lanes is important, unless you have a Mainboard that comes with PLX chips. Having GPUs run in x8 Mode instead of x16, will only marginally slow down the performance. (Note though, the PLX Chips won’t increase your GPU bandwith to the CPU, just make it possible to have more cards run in higher modes)

Best GPU Performance / Dollar

Ok so here it is. The Lists everyone should be looking at when choosing the right GPU to buy. The best performing GPU per Dollar!

GPU Benchmark Comparison: Octane

This List is based off of OctaneBench 3.

(It’s quite difficult to get an average Price for some of these cards, since crypto-currency mining is so popular right now, so I used MSRP)

GPU NameVRAMOctaneBenchPrice $ MSRPPerformance/Dollar
RTX 20708175550
GTX 10708120400
GTX 1070 Ti8130450
GTX 1060884300
GTX 1080 Ti11186700
GTX 10808137550
RTX 20808189799
RTX 2080 Ti112401199
TITAN XP121911300
Titan V122573000
GTX TITAN Z121442999
Quadro P6000241763849
Quadro GP100162327000
Tesla P100162307500

Source: Complete OctaneBench Benchmark List

GPU Benchmark Comparison: Redshift

The Redshift Render Engine has its own Benchmark and here is a List based off of Redshift Bench. Note how the cards scale (1080TI) [RedshiftBench Mark (Time [min], shorter is better)]:

GPU NameVRAMRedshiftBenchPrice $ MSRPPerformance/Dollar
RTX 2070811.35550
GTX 1070817.11400
GTX 1080 Ti1111.44700
RTX 2080810.59799
4x GTX 1080 Ti113.072800
2x GTX 1080 Ti116.151400
8x GTX 1080 Ti111.575600
GTX 1080816.00550
RTX 2080 Ti118.381199
TITAN XP1210.541300
Titan V128.503000
Quadro P60002411.313849
Quadro GP100169.577000

Source: Complete Redshift Benchmark Results List

GPU Benchmark Comparison: VRAY-RT

And here is a List based off of VRAY-RT Bench. Note how the GTX 1080 interestingly seems to perform worse than the GTX 1070 in this benchmark:

GPU NameVRAMVRAY-BenchPrice $ MSRPPerformance/Dollar
GTX 107081:25 min400
RTX 207081:05 min550
GTX 1080 TI111:00 min700
2x GTX 1080 TI110:32 min1400
GTX 108081:27 min550
4x GTX 1080 TI110:19 min2800
TITAN XP120:53 min1300
8x GTX 1080 TI110:16 min5600
TITAN V120:41 min3000
Quadro P6000241:04 min3849

Source: VRAY Benchmark List

Speed up your Multi-GPU Rendertimes

So unfortunately GPUs don’t scale linearly. 2 GPUs render an Image about 1,8 times faster. Having 4 GPUs will only render about 3x faster. This is quite a bummer, isn’t it? Having multiple GPUs communicate with each other to render the same task, costs so much performance, that one GPU in a 4-GPU rig is basically just managing decisions.

The solution is the following: When final rendering image sequences, use as few GPUs as possible per task. If you have to render 4 images and have 4 GPUs, let every GPU render one image instead of having 4 GPUs render on every image. This way you will not encounter any slow-down. Some 3D-Software might have this feature built-in, if not, it is best to use some kind of Render Manager, such as Thinkbox Deadline (Free for up to 2 Nodes/Computers).

Beware though, that you might have to increase your System RAM a bit and have a strong CPU, since every GPU-Task needs its amount of RAM and CPU performance.

Buying GPUs

NVIDIA and AMD GPUs are both hard to get by for a reasonable price nowadays, since mining is so popular. Graphics Cards are mostly Out of Stock and even when they are available, they are nowhere near MSRP. There is a site called nowinstock that gives you an overview of the most popular places to buy GPUs in your country, and notifies you as soon as cards are available.

I put together some Builds in different Price ranges here for you to get a head start in configuring your own dream-build.

Redshift vs. Octane

Another thing I am asked often is if one should go with the Redshift Render Engine or Octane.

As I myself have used both extensively, in my experience, thanks to the Shader Graph Editor and the vast Multi-Pass Manager of Redshift, I like to use the Redshift Render Engine more for doing work that needs complex Material Setups and heavy Compositing.

Octane is great if you want results fast, as it is slightly easier to learn for beginners. But this of course is a personal opinion and I would love to hear yours!

What Hardware do you want to buy?


Alex from CGDirector - post author

Hi, I am Alex, a Freelance 3D Generalist, Motion Designer and Compositor.

I have built a multitude of Computers, Workstations and Renderfarms and love to optimize them as much as possible.

Feel free to comment and ask for suggestions on your PC-Build or 3D-related Problem, I'll do my best to help out!



Dear Alex!

Thank you so much for this article and that i stumbled upon this!
i hope you find a minute to answer this for me, i am trying to come up with a rig, i am yearning to buy….
would appreciate a lot if you could drop your 2 cents on that list

additionally appreciate a ton if you can shed some advice on the issues below .

the most frustrating is picking up RAM for the threadripper 2950X everyone is screaming out to go with G.skill trident Z as its the lastest and best optimized for threadripper (plus lot of people have issues with RAM especially i am reading a lot people have to downclock their RAM to work with the threadrippper).
the dilema is i would like to ideally get 4×16 64Gigs and later upgrate to another 4 sticks of the same. (but tridentZ doesnt have that option out of the box it only come with either 8×8 64GB OR 8×16 128GB sets) – is it safe to mix match?

after reading your post and another post from the pugetsystems (
i am thinking of getting either 4 x RTX 2070 (hoping redshift will use the RTX better soon) – only catch is how much of a difference would it make that it doesnt support NVlink. although i am not rendering incredibly huge scenes regularly.

thanks in advance


I missed to mention, i would be primarily wanting to use it for houdini simulations and Octane/ Redshift lookdevs and renders.


Hi Alex,
I’m putting together a build that I intend to use principally for GPU rendering in Redshift. However, at the moment I also still do a good deal of work in Standard Renderer in Cinema and also do a lot of work in After Affects. I therefore need to cover both CPU and GPU capability with the components I choose.. Im thinking a processor with a med.number of cores that still clocks relatively high?.. I put together this setup as an example and would be great if anyone has an opinion to share. Mainly it would be great to know if Im overspending on components that could be equaled with something cheaper here, and also if Im missing anything obvious to consider when putting together a high end setup like this… (4x 1080 Ti VS 3 x 2080Ti was one quick example I thought of)

Cheers, Matt.

Overclocked CPU Overclocked AMD Threadripper 1950X 16 Core (3.4GHz @ up to 4.0GHz)
Motherboard ASUS® ROG ZENITH EXTREME (DDR4, 6Gb/s, CrossFireX/SLI) – RGB Ready!
Memory (RAM) 64GB Corsair VENGEANCE DDR4 2933MHz ~ (8 x 8GB)
Graphics Card 11GB NVIDIA GEFORCE RTX 2080 Ti – HDMI, 3x DP GeForce – RTX VR Ready!
2nd Graphics Card 11GB NVIDIA GEFORCE RTX 2080 Ti – HDMI, 3x DP GeForce – RTX VR Ready!
3rd Graphics Card 11GB NVIDIA GEFORCE RTX 2080 Ti – HDMI, 3x DP GeForce – RTX VR Ready!
1st Storage Drive 6TB SEAGATE BARRACUDA PRO 3.5″, 7200 RPM 256MB CACHE
1st M.2 SSD Drive 256GB ADATA SU800 M.2 2280 (560 MB/R, 520 MB/W)
Processor Cooling Corsair H150i PRO Hydro Series High Performance CPU Cooler


hi alex,
I am an architect trying to set my configurations of 2 computers 1 for rendering of buildings and another for 3d modeling.. Budget for 2 systems is 1500$ each i made 2 systems configuration, Can you please suggest me suitable motherboards and other parts for both processors?

My preferences for above processors above:

System1 for 3d modelling:
CPU : Intel i7 8086k
CPU cooler : ?
Motherboard (suggest the model) with
PCIE slots = 2
Ram Slots = 4
Memory (RAM) : 1 X 16GB DDR4 4166 or 2133 (suggest model)
storage : PCIE M2 SSD Samsung 970 EVO (500 GB)
GPU : NVidia GTX 1070 (2gb)
Case : Please suggest
Power supply : Please suggest for this

System2 for Rendering:
CPU : AMD threadripper 1900X
CPU cooler : ?
Motherboard (suggest the model) with
PCIE slots = 2
Ram Slots = 4
Memory (RAM) : 1 X 16GB DDR4 4166 or 2133 (suggest model)
storage : PCIE M2 SSD Samsung 970 EVO (500 GB)
GPU : NVidia GTX 1070 (2gb)
Case : Please suggest
Power supply : Please suggest for this


Hey Alex
Thank you so much for this article! I want to use Cinema 4D with Redshift from now on with the following setup (Work and Renderstation):


CPU: Intel i9-9900K (LGA 1151, 3.60GHz, Unlocked)
RAM: 32 GB Kingston Value RAM, 2666MHz
HD: Samsung 970 PRO/EVO 1TB


CPU: Intel Core i9-7900X (LGA 2066, 3.30GHz, Unlocked)
MAINBOARD: Asus WS X299 Sage

(RAM, HD, Case, Power Supply, Cooling is to be defined)

My questions:
— What do you think about this setup?
— With the amount of the PCIE Lanes of this setup (CPU 44 PCI-E lanes) and the plx-chips on the mainboards: Is it possible to use 4 (up to 7) GPUS, am I right?

Thank you!

sheraz asghar

I am a miner and 3D Generalist. Since mining is not profitable as it used to be I want to switch my mining rig into a rendering rig(s). I have 19 GPUs 2x 64 vegas, 5x 56vegas 12x, 580 RX nitro’s. All AMD cards. I am hoping if you can tell me exactly what motherboard(s) and processers(s) to buy that will support the maximum amount of cards on each motherboard. I use MAYA/3ds max with VRAY. Currently, for mining I have 2x Biostar 250 pro motherboard(s) this supports up to 12 GPUs with riser cables. Is that something I can re-use. What would you recommend?

Thank you


How do you feel about running two rtx 2070s instead of one 2080



Is it possible to run four rtx 2080 ti in a single computer ?



Hi Alex, I have built pc with i7 8700k gtx1070 and 16gb ram. Right now I’m using standart render engine on C4D which is cpu based. Would it make a change in render time if I used a gpu based render engine such as Octane with my current setup? I know gpu renders are better with multiple graphic cards but having a single 1070, is it going to be faster than cpu rendering? How much change would it make to add a second 1070? Is there a way to compare cpu vs gpu render time according to my setup?



Hi Alex,
Thank you for sharing your knowledge. Thanks to you I understand a lot more of computers know.
I built a workstation a while ago with the help of your website.
Octane runs very fast and I’m happy but the screen freezes often. And sometimes the screen gets black for a second (Screen losing very short the signal but in normal use, not while rendering, maybe weak power supply?). Now I thought, maybe I did something wrong with the hardware:


Intel Core i7 6850K (LGA 2011-v3, 3.60GHz, Unlocked)

4x Corsair Vengeance LPX (2x 2 Set, 16GB, DDR4-3200, DIMM 288)

ASUS X99-E WS/3.1, CEB, LGA2011-v3 (LGA 2011-v3, Intel X99, SSI CEB) (x16/x16 , x16/x16/x16 , x16/x16/x16/x16) (Do this work in x16/x8/x8/x8 or not? Maybe this is a mistake?)

Dark Power Pro 11 1200 W (Maybe to weak?)

Did i something wrong?
And is it possible to replace the CPU with one it’s a bit better for simulations in my case?
Thanks for your help!

Best regards from Switzerland


Hi Alex, thank you so much for all this info.

I am a Vray user and recently have decided to make an upgrade to my old pc but I’m thinking this time to start using gpus for rendering

old pc config:
-i7 5820k 3.3GHz
-MSI X99S MPOWER (MS-7885)
-Crucial Ram 32gb 4×8 ddr4-2400
-Quadro 2000 1gb
-Tesla c2075 6gb
-PSU Corsair 850W

I’m thinking to add 2xGTX 1080 Ti with the existing PSU or 3x (3x maximum for this mboard)
with a bigger PSU and save some money of the total budget buying software, extra storage and a new 4k monitor

I’m still confused about the set up of the gpus. If I stacked 2 gpus will I take double the amount of Vram and if so should I buy an sli 2way for this?
Works also for 3 and 4?

At the end of the day you think this setup worth it for the time or should I make a new one with AMD Threadripper?


Hello, I work at a company that will be building a beastly rendering box, but I’m having a hard time finding a mining sever rack case to house all seven 1080 ti’s and the WS X299 Sage MB. The main problem is the motherboard’s CEB Form Factor (12 inch x 10.5 inch). Most mining cases only support a max of MB size of ATX.


Hi Alex, you´ve been a great source of inspiration while building our new Octane rendering machine. My question is about how much rendering power I am actually loosing right now that my two 1080TI are running at 8X due to our 8700K setup?. I mean, does it worth it to go for a 7900X?. And if your answer is yes: will I have to also change mobo (asus z370 prime A 1151 socket).
Well thanks in advance for you reply!


Hi Alex,

Amazing source of knowledge, thanks! I’m putting together a PC (moving from Mac) built for C4D, Octane & Redshift, AE and a little bit Houdini. The problem is obviously CPU. I decided to go the highest clock possible and low cores (not ideal for Houdini) but at the same time wanna keep PCI lanes’ number high. I was thinking that Intel Core i9-7900X 3.30 GHz LGA 2066 will be a good compromise between fast viewport (3.3 GHz / 4.3 GHz and a decent amount of PCI lanes (44).. What do you think?

Here’s complete build:
Corsair CC-9011030-WW Carbide Series Air 540 ATX
ASUS WS X299 SAGE Intel X299 DDR4 S-ATA 600
Intel Core i9-7900X 3.30 GHz LGA 2066
NZXT Kraken X62 (280mm)
Samsung 970 EVO 1 TB V-NAND M.2 PCI
Corsair CMK32GX4M2A2400C16 Vengeance LPX 64 GB (4 x 16 GB) DDR4 2400 MHz XMP 2.0
EVGA GeForce GTX 1080 Ti FTW3 HYBRID GAMING, 11GB GDDR5X, HYBRID (start with one and scale up to 4 over time — budget thing)
BenQ PD3200U 32 inch


Hi, Alex!
At first, I want to tell you many thanks for source! I found a lot of useful information.
All time i worked on laptops and now i want to buy realy good workstation for After Effects, Cinema 4D, Octan, Redshift.
I try to find compromise between good speed in viewport and not bad rendering in octan with maybe 3 or 4 GTX 1070ti or 1080. I understood that its almost impossible, and i should choose between viewport or rander, but maybe you can advice some options? My budget about 4000 usd.
I need your advice about CPU, GPU, MoBo and cooling fort that .
Many thanks for advance!
P.S. Sorry for my English) it not my native language)


Hi, Alex
I’ve been using octane on a laptop with 16gb ram and a 1050 ti and i’ve decided to upgrade too a proper set up since rendering is taking forever.
Now i’ve asked a friend whom knows a bit more about pc building and he gave me a list of parts to get. However he’s not very knowledged in good render pc’s so i’d like to ask you if there’s anything is could/should change to this list.

AMD Ryzen 7 1700x
Bitfenix ENSO case black
Bitfenix Spectre Pro RGB 120 fan
Corsair Builder CX 850M Power
G.skill DDR4 Fortis 2x16gb 2400Mhz Ram
MSI x370 GAMING PRO CARBON Motherboard
Samsung 970 Evo 250GB SSD
Seagate HDD 3.5 4tb HDD
VGA Gigabyte Geforce GTX 1080 Windforce OC 2x graphics card

Thanks in advance!


Hey Bouri,
Yes those are good specs. If you have an extra 100€ you can also take a look at the Ryzen 2700x which is the newer generation of the 1700X and worth it in many cases. You might need a Bios Update though for that Mainboard with a 2nd Gen Ryzen.



Hi Alex,
I am a upcoming interior designer so I am wanna built a PC for 3DS Max, Google sketchup with V Ray rendering . I decided to choose Intel i7 8700k processor , Nvidia 1080ti GPU ,16 gb of ddr4 ram and 256 gb SSD. So is this spec is good ? My budget is $2,200 to built whole PC . And also which mother board and cooling fan I should choose in perspective to upgrade in future
_ Aayush


I want to build faster pc for after effects , premiere pro, 3ds max rendering (vray) , cinema 4d and element 3d. I am just beginner so please let me know the most fast PC (CPU, graphic card , motherboard ) for $2500-$3200 budget. Please list the all equipment that you recommend so that I can buy while I am in VA near Microsoft store. Thank you!!

Geoff Coope

Hi Alex

Thanks for this post. I am currently teetering on getting a single slave or just upgrading my current machine (4700K + 1080Ti + 1070Ti, 32GB Ram) for use with GPU rendering in Max with either Vray RT or Redshift.

A second machine would free up my main machine when rendering in the day but has the added cost. So not decided which way to go on that front yet.

Anyway, my question. I need a motherboard / CPU that can scale with my work demands so looking for a CPU + Motherboard that can take 4 GPU’s but initially will only use 2. Any recommendations on current MBrd/CPU combo hardware available today? Or is the Sage still a good choice?



Hey Geoff,
Actually I am currently looking into this myself. Using a fast Computer to work on (high-core-clock) but need a high PCIE-Lanes CPU to render on, getting a second PC is somewhat inevitable.
I think the best choice currently is the Threadripper 1900X that has 64 PCIE-Lanes and together with (for example) the MSI X399 Gaming Pro Carbon can take on 4 GPUs (2 in 16x Mode and 2 in 8x Mode). The TR4 Socket will also support upcoming Threadripper generations, so a big plus in terms of upgradeability. The Sage is interesting when using Intel CPUs, since the Intel CPUs have less PCIE Lanes. But with Threadripper you don’t have this problem anymore. And running GPUs on 8x does not make a difference to 16x.


Geoff coope

That’s good to know. The new tread ripper 32 core sounds great too but not sure it needs a new mb. Thanks for reply! Will look into the motherboard

Jarratt Moody

Enjoying all of your wonderful articles and extremely handy price/performance charts.

Looking for best of both cpu/gpu worlds with high processor speed of the 8700k along with a couple 1080tis running at 8x pcie. I do mostly motion graphics using Cinema 4d and After Effects and have started using Octane as my primary 3d renderer. Does that sounds like the perfect setup? Any other pointers if so/if not would be hugely appreciated. I guess I9 7900x could be better more cores, still 4.5 ghz turbo, and allow for more gpus.

Thank you!!


Really great article, it’s helped me a lot to start to understand whats what. I’m switching from mac to PC so I need all the help I can get!
Some of the replies here are a little bit old now so I was wondering if there have been any developments in terms of the best CPU to run 4 GPUs? Looking into it it seems like the i9-7900X is a good option and the i7-6850K is maybe even better whilst being cheaper. Is there anything else to consider between these 2 CPUs or another one that you think is currently better suited to the task?


Hi Howie,
The Computex is currently going on and Intel will release some new HEDT CPUs by the end of the year. These though will be quite expensive, so I would say the i9 and Threadrippers are still the best choice for high PCIE-Lane CPUs



Thanks for the reply Alex. So if this machine is purely for GPU rendering and C4D, would you say the i9 is better than the i7 6850k?


Hi Alex,
I’m so grateful for all your help,
Unfortunately i couldn’t find any good mobo which takes 4 gpu’s as x16 in the country i’m living in at moment,
also couldn’t find EVGA 1080ti hybrid,
decided to go with x2 1080ti gpu’s on asus prime x299 delux, with i7-7820x
there are so many 1080ti versions [not hybrid] , do you recommend any alternative than evga hybrid ?
appreciate your time and effort


also why to go for x299, and not z370 ?


Hello Alex,
Thank you very much for sharing your knowledge. Very usefull.

I would like to ask you one thing, because I’m going crazy and I’m desperate with my computer problems.
I’m recently using a new computer (I bought from a company specialized in 3d work), with x4 1080ti – Windows 10 – Intel Xeon E5-1650… . I’m using Cinema 4d and Octane and some weeks ago I’ve been experimenting a lot of blue screens, screen freezes, render crashes,etc.. I can’t render a scene by night because always crashes.

I’ve noticed in Octane forums that a lot of people have the same problems, but nobody have a strong solution. I’m trying a lot of drivers versions, and the last method I read was to change the TDR values of the registry, changing 8s by 60s… like this manual:

After changing the TDR values my render don’t show “render crash” but it’s worse, because it stays frozen with no feedback…
So my problems persists, and I’m really desperated…

1. I don’t know if it’s a hardware problem, and Octane poblem or Windows problem…what do you think?
2. Do you recommend me to use Windows 7?? I think it’s my last option…

Thank you very much,


Hey Alex,

Thank you for the nice article.
As an architect I will use my computer for complex modeling plus rendering and I guess that needs a processor with max of cores (the more the better).
The problem is the more cores the less core-clock CPU.
What do you think and suggest dear Alex?

Best regards,


Hi Alex,
I am looking for a workstation configuration for redshift and octane in combination with C4d. I am planning to go with 4 gtx1080ti’s or free with any other good option. Could you please guide me with the configuration of cpu and motherboard and Gpu’s also.
Thanks in advance


Hi Alex

I recently built a 1950X machine for multiple purposes (VRay RT, AE, Premiere Pro, Audio):
1080Ti & 1080

The problem is that I found out now that the 1950X has some problems with the navigation in After Effects (and it has problems with an audio tool I often use). I really want to switch to a 8700K. The only thing that held me back was the thought of not being able to render at the same speed in 3D. But after reading your post, the 8700K would be the better solution for GPU renders anyways (since I’m mainly using VRay RT), am I getting this right?

What’s your recommendation? Should I stick with the 1950X? I don’t think Adobe is going to enable Multicore on AE again soon… oh and I plan to use 3 1080Ti sometime in the future.

Thank You!


Hi Alex, I was curious if you had seen any testing in regards to the new Titan V with redshift?



Hi Alex,

I’m upgrading my workspace by building up a new render station for Redshift and Octane. My issue is that im torn between wither going the Ryzen route or the new 79xx route. The reason being, I want to run either 3 1o8oti’s or 4 1080s at the best speed possible.

Looking at the require PCIe lanes available, i need your advice or what could potentially work best and still be future proof. I know i will get more PCIe lanes on ryzen i just havent jumped on it before.

Could you recommend some ideal compatible parts for a build for redshift, specifically on the CPU and MOBO side. Im building inside a Corsair Obsidian 900D.


Great info! Question: Have you noted the impact of overclocking (GPU and/or CPU) with respect to the results in your charts? When comparing my configuration results in VRAY Bench to the ones listed on the website, I score in the middle of similarly-configured systems. If I run everything at stock speeds, I’m out in left field. I’d be interested in your take on this, if any.


Hi Alex, first off – thank you so much for all this useful knowledge on this site, learning a lot about how I should go about building my first PC for Octane for Cinema 4D and some Aftereffects motion design.

I am torn between the i7 7700K and the 8700K, I’m planning to buy one GTX 1080Ti and add another one in the near future. If I was to go up to 2, and maybe even 3 or 4 1080Ti’s in the future, which MoBo should I consider?


Hi Alex

First of all, great post, congrats!
My concern is about GPU’s, i want to build a rendering workstation for 3ds max + Vray 3.6 and in terms of graphic cards i’m planning to use a gtx 1070 for viewport and a gtx 1080 ti for render and add 1 or 2 more gtx 1080 ti in the future.
My doubt is, it is possible to have different cards in the same build? i’m asking this, because all the people that i see building this kind of machines with multiple gpu’s, uses the same cards.

Thank you in advance.

Kurt jefferson macacando

Hi sir.. im planning to have my first ever cpu.. im planning to have a i7 7700k processor and a gtx 1070 8gb gpu.. and a 16gb ram.. can i have a fast rendering time for vray 3.0 sketchup 2017? Or a ryzen 5 1600 processor due to its 6 cores and 12 thread.. im a bit confuse.
Due to tight budget.. i really need your help for this..

Thank you sir!


Hi Alex. Your blog posts have really helped me understand pc builds for working in Cinema 4D. I’m trying to do a build with the i7 7700k and 4x1080ti cards on PCPartpicker. I can’t seem to find information on a motherboard that would support this configuration. Any advice? Thank you in advance!

Deb Pearl

My son has been looking for a new graphics card and I wanted to look up some information about them. That is great news that they have matured quite a fit over the last couple of years. That means my son could probably find exactly what he wants for his computer easier. Thank you for all the information! I will be sure to show my son.

Frank Gomez

Hi Alex,

Thank you for your posts, they are very helpful. Two questions:

1. Regarding the i7-7700K. If I use 1TB Samsung 960 EVO M.2 NVMe PCIe in my build. Would this affect the PCI lanes for the GPU? Or would the GPU still run x16?

2. If I want to run 4 GTX 1080ti at full speeds (x16), would i have to move to the Xenon processors? What mobo should I use?

Thanks Again.



Hi, Aelx

Good Post!

A question if I want to have 4 gtx1080 in a corei7 6800k that would have lost for rendering with octane? Is insignificant? or it would be worth buying 6850k to be able to have the 4 gtx.

And what kind of cooling you recommend for these 4x gtx1080, thank you very much for your time!



Hi, Aelx
Can i use 4 GPUs (my preference 1070) with 7700k? for octane.
If can, then which Motherboard to choose.