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

CG Director Author Alex Glawion  by Alex Glawion   ⋮   ⋮   319 comments
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Best Hardware for GPU Rendering in Octane – Redshift – Vray (Updated)

Graphics Card (GPU) based render engines such as Redhift3D, Octane or VRAY-RT have matured quite a bit 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 are most affordable and best PC-Parts for rendering with Octane, Redhsift3D, VRAY-RT or other GPU Render Engines?

Let’s take a look:

Best Hardware for GPU Rendering

Processor

Since GPU-Render Engines use the GPU to render, technically you should go for a max-core-clock CPU like the Intel i9 9900K that clocks at 3,6GHz (5Ghz Turbo) or the AMD Ryzen 9 3900X that clocks at 3,8Ghz (4,6Ghz 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.

PCIE 4 x16 Slot

Image-Credit: MSI, Unify x570 Motherboard – A typical PCIE x16 Slot

The i9 9900K/3900X have 16 GPU<->CPU 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 (e.g. the AMD Threadripper 2950X or Threadripper 3960X) or on the Intel side, the i9 10900X Series CPUs that support 48 PCIe-Lanes (e.g. i9 10980XE).

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

This would mean you could run two GPUs on an i9 9900K or Ryzen 9 3900X in x8 PCIe mode. (For a total of 16 PCIe Lanes)

You could theoretically also run 4 GPUs in x16 Mode on a Threadripper CPU (= 64 PCIe Lanes). Unfortunately this is not supported though, and the best you can get with Threadripper CPUs is a x16, x8, x16, x8 Configuration.

CPUs that have a high number of PCIe-Lanes usually fall into the HEDT (= High-End-Desk-Top) Platform range and are usually also great for CPU Rendering as they tend to have more cores and therefore higher multi-core performance.

Here’s a quick bandwidth comparison between having two Titan X GPUs run in x8/x8, x16/x8 and x16/x16 mode. The differences are within the margin of error.

Beware though, that the Titan X’s in this benchmark certainly don’t saturate a x8 pcie 3 bus. With upcoming GPU generations this might change. A current gen 2080Ti for example already saturates a x8 pcie 3.0 Bus in terms of bandwidth.

PCIE_Lanes Compariosn

When actively rendering and your scene fits nicely into the GPUs VRAM, the speed of GPU Render Engines is of course mainly dependent on GPU performance.

Some processes though that happen before and during rendering rely heavily on the performance of the CPU, Storage, and (possibly) network.

For example, extracting and preparing Mesh Data to be used by the GPU, loading textures from your Storage 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 to fit into your GPU’s memory, the GPU Render Engine will need to access your System’s RAM or even swap to disk, which will considerably slow down the rendering.

Best Memory (RAM) for GPU Rendering

Different kinds of RAM won’t speed up your GPU Rendering all that much. You do have to make sure, that you have enough RAM though, or else your System will crawl to a halt.

Corsair Vengeance LPX

Image-Source: Corsair

I recommend keeping the following rules in mind to optimize performance as much as possible:

  • To be safe, your RAM size should be at least 1.5 – 2x your combined VRAM size
  • Your CPU can benefit from higher Memory Clocks which can in turn slightly speed up the GPU rendering
  • Your CPU can benefit from more Memory Channels on certain Systems which in turn can slightly speed up your GPU rendering
  • Look for lower Latency RAM (e.g. CL14 is better than CL16) which can benefit your CPU’s performance and can therefore also speed up your GPU rendering slightly

Take a look at our RAM (Memory) Guide here, which should get you up to speed.

If you just need a quick recommendation, look into Corsair Vengeance Memory, as we have tested these Modules in a lot of GPU Rendering systems and can recommend them without hesitation.

Best Graphics Card for Rendering

To use Octane and Redshift you will need a GPU that has CUDA-Cores, meaning you will need an NVIDIA GPU. VRAY-RT additionally supports OpenCL meaning you could use an AMD card here. If you are using other Render Engines, be sure to check compatibility here.

The best bang-for-the-buck NVIDIA cards are:

Nvidia RTX 2070

Image-Source: Nvidia

On the high-end, the currently highest possible performance is offered by the NVIDIA Titan V and Titan RTX, that also come with 24GB of Video RAM.

These Cards though have worse Performance per Dollar as they are targeted at a different audience and VRAM is very expensive but not necessarily needed in such high capacities for GPU Rendering.

In my experience, 8GB – 11GB of VRAM is usually plenty for most scenes, unless you know you will be working on extremely complex projects.

GPU Cooling

Blower Style Cooler (Recommended for Multi-GPU setups)

  • PRO: Better Cooling when closely stacking more than one card (heat is blown out of the case)
  • CON: Louder than Open-Air Cooling

Open-Air Cooling (Recommended for single GPU Setups)

  • PRO: Quieter than Blower Style, Cheaper, more models available
  • CON: Bad Cooling when stacking cards (heat stays in the case)

Hybrid AiO Cooling (All-in-One Watercooling Loop with Fans)

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

Full Custom Watercooling

  • PRO: Best temps when stacking cards, Quiet, some cards only use single slot height
  • CON: Needs lots of extra room in the case for tank and radiators, Much more expensive

GPU Cooling Variants - Blower - open air - hybrid - water cooled

NVIDIA GPUs have a Boosting Technology, that automatically overclocks your GPU to a certain degree, as long as it stays within predefined temperature and power limits. So making sure a GPU stays as cool as possible, will allow it to boost longer and therefore 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 and throttle very early. So if you are thinking of Rendering on a Laptop, keep this in mind.

A quick note on Riser Cables. With PCIe- or Riser-Cables you can basically place your GPUs further away from the PCIe-Slot of your Motherboard. Either to show off your GPU vertically in front of the Case’s tempered glass side panel, or because you have some space-constraints that you are trying to solve (e.g. the GPUs don’t fit).

If this is you, take a look at our Guide on finding the right Riser-Cables for your need.

Power Supply

Be sure to get a strong enough Power supply for your system. Most GPUs have a Power Draw of around 180-250W.

I Recommend a 550W for a Single-GPU-Build. Add 250W for every additional GPU that you have in your System. Good PSU manufacturers to look out for are Corsair, beQuiet, Seasonic, and Coolermaster but you might prefer others.

Corsair AX760W PSU

Image-Credit: Corsair

There is a Wattage-Calculator here that lets you Calculate how strong your PSU will have to be by inputting your planned components.

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 physical PCI-E Slots but only support one x16 PCI-E Card (electrical speed).

This can get quite confusing. Check the Motherboard manufacturer’s Website to be sure the Multi-GPU configuration you are aiming for is supported. Here is what you should be looking for in the Motherboard specifications:

Asus Rampage PCIE Lane Config

Image-Source: Asus

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 Lane-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 PCIe Lanes. 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

Image-Source: Asus Mainboard Manual

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 on most GPUs. (Note though, the PLX Chips won’t increase your GPU bandwidth 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 on OctaneBench 4.00.

GPU NameVRAMOctaneBenchPrice $ MSRPPerformance/Dollar
RTX 206061703500.485
RTX 2060 Super82034200.483
RTX 207082105000.420
RTX 2070 Super82205500.400
GTX 1070 Ti81534500.340
GTX 107081334000.333
RTX 2080 Super82337200.323
GTX 1080 Ti112227000.317
GTX 10608943000.313
RTX 208082267990.282
GTX 108081485500.269
RTX 2080 Ti1130411990.253
TITAN XP1225013000.192
Titan V1239630000.132
RTX Titan2432627000.120
GTX TITAN Z1218929990.063
Quadro GP1001628470000.040
Quadro P60002413938490.036
GPU NameVRAMOctaneBenchPrice $ MSRPPerformance/Dollar

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 2070811.355001.762
GTX 1070817.114001.461
GTX 1080 Ti1111.447001.248
RTX 2080810.597991.181
4x GTX 1080 Ti113.0728001.163
2x GTX 1080 Ti116.1514001.161
8x GTX 1080 Ti111.5756001.137
GTX 1080816.005501.136
RTX 2080 Ti118.3811990.995
TITAN XP1210.5413000.729
Titan V128.5030000.392
Quadro P60002411.3138490.229
Quadro GP100169.5770000.149
4x RTX 2080 Ti112.2847960.914
RTX 2080 Super810.157201.368
RTX 2070 Super811.175501.627
RTX 2060 Super812.174201.956
GPU NameVRAMRedshiftBenchPrice $ MSRPPerformance/Dollar

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 min4002.941
RTX 207081:05 min5502.797
GTX 1080 TI111:00 min7002.380
2x GTX 1080 TI110:32 min14002.232
GTX 108081:27 min5502.089
4x GTX 1080 TI110:19 min28001.879
TITAN XP120:53 min13001.451
8x GTX 1080 TI110:16 min56001.116
TITAN V120:41 min30000.813
Quadro P6000241:04 min38490.405

Source: VRAY Benchmark List

Speed up your Multi-GPU Rendertimes

Note – This section is quite advanced. Feel free to skip it.

So, unfortunately, GPUs don’t always scale perfectly. 2 GPUs render an Image about 1,9 times faster. Having 4 GPUs will only render about 3,6x 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 a large part of one GPU in a 4-GPU rig is mainly just there for managing decisions.

One solution could be the following: When final rendering image sequences, use as few GPUs as possible per task.

Let’s make an example:

What we usually do in a multi-GPU rig is, have all GPUs work on the same task. A single task, in this case, would be an image in our image sequence.

4 GPUs together render one Image and then move on to the next Image in the Image sequence until the entire sequence has been rendered.

We can speed up preparation time per GPU (when the GPUs sit idly, waiting for the CPU to finish preparing the scene) and bypass some of the multi-GPU slow-downs when we have each GPU render on its own task. We can do this by rendering one task per GPU.

So a machine with 4 GPUs would now render 4 tasks (4 images) at once, each on one GPU, instead of 4 GPUs working on the same image, as before.

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).

GPUs per task

Option to set the amount of GPUs rendering on one task in Thinkbox Deadline

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.

Redshift vs. Octane

Another thing I am asked often is if one should go with the Redshift 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’s learning curve is shallower. But this, of course, is a personal opinion and I would love to hear yours!

Custom PC-Builder

If you want to get the best parts within your budget you should have a look at the Web-Based PC-Builder Tool that we’ve created.

Select the main purpose that you’ll use the computer for and adjust your budget to create the perfect PC with part recommendations that will fit within your budget.

CGDirector PC-Builder Tool

PC-Builder Facebook Title Image

What Hardware do you want to buy? Let me know in the comments!



Join the New CGDirector Forum! Expert Advice & PC-Build Planning with a warm and friendly Community! :)

Alex Glawion - post author

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

I’ve 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!

319
Comments

Adrian

Hi Alex,

I, Build my CPU for rendering but i doubt if may existing GPU card 1050ti is enough to do rendering job like Vray other 3d software.

Please i need you advise.

Here are the specs. of my CPU build.
GIGABYTE AORUS ELITE X570
RYZEN 7 3700X
G.SKILL TRIDENT Z 3200CL16 32GB
PSU 650W
SSD 970 EVO PLUS

Thank you so much.
Adrian,

Thierry Tolhuijs

Hi Alex,

I have a question, i am currently running C4DR22 + Redshift v3.0.22 on this PC config;

AMD Ryzen 9 3950X
Gigabyte X570 AORUS PRO
Corsair Vengeance RGB Pro – Geheugen
2x Samsung 970 EVO 1TB M.2 – Solid state drive
Samsung 860 EVO 2TB – Solid state drive
be quiet! Dark Power PRO 11 1200W
Corsair Carbide 275Q
be quiet! Pure Wings 2
Corsair H100i Pro RGB

Nvidia: v446.14 driver

When i use redshift the utilization only sticks at between 9 – 12%. Do you know why this is so low… or is this normal?

Regards,

Thierry

Pedro Ospina

Hello Alex!

I have a question, Does any Nvidia graphic card support octane and redshift?,I’ve got a rx 590 from AMD so I didn’t know Amd graphic cards were not able to support octane and redshift, so I’m planning to buy a 1660 super or a 2060 super, Can I work with any of these two.

Thank you very much!.

Roma

Hello Alex!

It seems like my initial comment got lost, but I will do it again. First of all, thank you very much for this resource and your work! As a newbie to building a PC, I find it incredibly useful. I get lost when it comes to understanding the different parameters of hardware, but now it feels much better 🙂

And I hope you can guide me on my journey. My current setup is outdated and I wish to make it more suitable for day-to-day work. I mainly use C4D, Houdini and sometimes AE + Premiere for editing sometimes. I love Redshift as well 🙂 I want to play more with simulations in Houdini and C4D, so a good CPU with high core clock is needed.

From my current PC, I want to move only GPU > EVGA GeForce GTX 1070 8 GB FTW Gaming ACX 3.0

The build I am looking for is the following (my budget is within $1500 atm):

AMD Threadripper 1900X 3.8 GHz 8-Core Processor (or should I aim for AMD Threadripper 29xx at once?)
be quiet! Dark Rock Pro TR4 59.5 CFM CPU Cooler
Gigabyte X399 AORUS PRO ATX sTR4 Motherboard
G.Skill Ripjaws V 32 GB (2 x 16 GB) DDR4-3600 Memory (I plan to double it in some time)
Western Digital Black 4 TB 3.5″ 7200RPM Internal Hard Drive
Samsung 970 Evo Plus 500 GB M.2-2280 NVME Solid State Drive
EVGA GeForce GTX 1070 8 GB FTW Gaming ACX 3.0 Video Card (I want to add RTX 2060 Super or RTX 2070 Super as the second GPU)
Corsair RMx (2018) 850 W 80+ Gold Certified Fully Modular ATX Power Supply (I calculated that I will need around 700 watts to handle 2GPUs)
ZXT H500 ATX Mid Tower Case

My main concern is if 2 GPUs of this type will work together fine. And that’s why I decided to choose AMD Threadripper 1900X > it has enough PCIe x16 lanes to handle even the third GPU (I hope :D).

The link to the build is: https://pcpartpicker.com/list/JQnBtp

Please let me know if you can spot any obvious newbie mistakes and if this setup should be suitable for the needs I listed. Thank you in advance! 🙂

Kate

Hey Alex!
I have a question for you.

First of all, I apologize for having bad English.

I want to upgrade my system for GPU rendering. (Realtime and Final Export)
So I want to buy a video card.

My pc;

-68000K
-Asus x99 Deluxe II
-2×16 Corsair 32 GB 3200 CL15 Ram
-Samsung 970 Evo Plus NVMe 500GB
-Seasonic 1050w 80+ Platinum Psu

—Evga FTW GTX 1070 (Sold)—

Which option do you think makes more sense? (Card prices in my country)

1. RTX 2060 SUPER—– (550$) —– Maybe I can add later. (+2060 Super)
2. RTX 2070 ————– (585$) —– Maybe I can add it later. (+2060 Super or 2070)
3. RTX 2070 SUPER—- (660$) —– Maybe I can add it later. (+2060 Super or 2070)

Is it worth the price differences? (In terms of performance increase)

Another question. :))
Will my pcie lanes be enough?

I will be very happy if you inform me. Thank you! 🙂

PauLR

Hey Alex, great website you have here, really helpful.

I`m about to purchase a new pc for rendering , maya + redshift , video editing, etc.
What do you think about this setup. Thank you

AMD Ryzen 9 3950X 3.5 GHz
ASRock X570 CREATOR ATX AM4 Motherboard
1 x RTX 2070 SUPER GPU
2 x GTX 970 GPUS (from existing pc)
Corsair Vengeance LPX 64 GB (2 x 32 GB) DDR4-3600 Memory
Sabrent Rocket 4.0 1 TB M.2-2280 NVME Solid State Drive x 2
WD 8 TB Drive
Corsair 750D ATX Full Tower Case
SeaSonic FOCUS Plus Gold 1000W 80+ Gold Power supply

Alex Glawion
Alex GlawionCGDIRECTOR

Hey Paul,
Looks like a great build! For the 3 gpus to run at decent pcie speeds though you might want a Motherboard such as the Asus WS ACE x570, as it supports 3 gpus at x8 speeds. The one you listed only supports the last slot at x4 speeds.

Everything else looks great!

Cheers,
Alex

PauLR

thanks Alex, I was interested in the creator board as it has 10gbe and thunderbolt 3 built in which I liked for future proofing. Any idea what the speed loss is if it’s only running x4 lanes?

Alex Glawion
Alex GlawionCGDIRECTOR

I thought so, the 10GBe is nice on that board. As for the speed loss it really depends on your scenes and the GPU you’ll put on that slot. the 970 GPUs will certainly loose much less (almost no) speed when running at x4 vs the 2070 Super which will loose a lot more.

Cheers,
Alex

PauLR

Thanks Alex, have ordered. Will update my findings.

Zach

Hi Alex. This article has been a big help as I’ve started piecing together hardware for my GPU focused build.

I had a couple questions on GPU cards though. I’m building my system with two phases in mind for working in Octane in Cinema 4D. The first is to get a foundation built and running with hardware that can be updated or added to down the line with two initial RTX 2070 Super GPUs. The next step is to upgrade some assets and look into adding a third and maybe fourth GPU.

The hardware I’m pretty cemented on to start with is:

AMD Threadripper 1900X (looking to upgrade down the line)
EVGA CLC 280 AIO Cooler
Gigabyte X399 Designare EX
Corsair Vengeance RGB Pro 64 GB (4×16) CL 16
Samsung 860 EVO 1TB Drive
Corsair Obsidion 750D Airflow Edition Case
EVGA SuperNOVA P2 850 W 80+ Platinum Certified Fully Modular ATX Power Supply (would upgrade down the line as necessary with additonal cards)

If my budget (~$3,200) can swing it I’d maybe look into a second 860 EVO 1TB drive for projects as well.

My main concern is with the graphics cards. I’m locked on the RTX 2070 Super for budget reasons and am looking at purchasing two of them to start out. And I expect to stick with that for a while. Is there a particular brand and model I should be looking at if I eventually wanted to add two additional GPUs to the set for more power? I’ve seen the pros and cons of blower vs fan models and see how expansion slots and motherboard set up play a role. I’m just having a hard time finding the ideal models to purchase with all of that in mind. I like the idea of starting with two fan GPUs for noise and aesthetic reasons, but would hate to find out in a few years the expansion slot size of those prevented me from adding additional ones.

Alex Glawion
Alex GlawionCGDIRECTOR

Hey Zach,
Great build that you can easily upgrade / expand down the line. As for GPUs, absolutely fo with blower-style gpus as once you have 4 of those and they are tightly packed, they will perform much better and throttle less than open air cooled gpus. I have a bunch of Asus Turbo Models running excellently in my render nodes, but also had good experience with msi aero, gigabyte turbo, zotac blower.

The 860 EVOs are great and a good balance between performance and price, but if you have some extra dollars lying around, do consider an nvme drive such as the 970 evo, as they tend to bring a pretty good speed bump to your active work, especially in terms of loading saving stuff or working in comp and editing.

Cheers,
Alex

Romas

Hi, Alex. Do you know is that possible to have in one system for example GTX 1080 Ti like main and secondary like Tesla K80, K40 or M40 like for additional RAM capacity. Need especially to work with Twinmotion, maybe Lumion as well, and they are based only on GPU render. On some bigger projects I have see during render (photos or videos no matter) my GPU uses all 11GB and 4-5 virtual, so together araund 15-16GB. At this moment all together are 35GB, still 20 vRAM extra, but maybe it will help do faster render or smoothly working with big projects? Or maybe it’s won’t work at all… On official Lumion site that says that SLI or Crossfire doesn’t add additional power, on Twinmotion site didn’t see about it any word, so 50/50… Or maybe it won’t be able to work at all… Just when I see that extra 24 GB RAM for only 300-400$ it’s so allure…

Alex Glawion
Alex GlawionCGDIRECTOR

Hey Romas,
This will most likely not work. You can only merge your VRAM across cards with an NVLINK bridge and I am fairly certain twinmtion or lumion don’t support something like that. (Might ask support though if they know)

Your best chance is to get a Quadro RTX (8000 or 6000) with more VRAM (Expensive, though:( )

Cheers,
Alex

Romas

Thanks for quick answer. Unfortunately Quadro too expensive for me at this moment…
Quick one, what about Radeon VII? It’s very similar on parameters but 16GB of memory.

Alex Glawion
Alex GlawionCGDIRECTOR

Hey Roma,
Yes you can also use AMD GPUs with Twinmotion and Lumion. The Radeon 7 with 16gb of VRAM would be a good choice if you can still find it. (I think it is not manufactured anymore)

Cheers,
Alex

Romas

Thanks again. Just ordered new one XFX AMD Radeon VII from amazon.co.uk for 600€, when it will arrive and I’ll test it abd I’ll write here my opinion against GTX 1080 Ti, which unfortunately few days ago died…

Troyan Turner

Alex, quick question. I have a rig with a single RTX 2080Ti card and I render mainly C4d scenes in Redshift. I’d like to add another RTX card to speed up rendering. 1) Do I have to get another 2080TI or can I have something like a 2060 or a 2080 Super? 2) Do I have to SLI bridge the cards are can they run separate since I’d essentially use them for rendering animations and they’d be 2 nodes?. Thanks!

Alex Glawion
Alex GlawionCGDIRECTOR

Hey Troyan,
No need to get the same card. It is usually advised to have cards that have the same amount oft VRAM, but this is just the best case. They will work with different amounts of VRAM too. Just be sure your PSU is strong enough and your motherboard supports decent pcie-lane speeds on the second slot.

No need to sli them with a bridge.

You can set it up either way. Both cards render on one frame, or each cards renders its own frame. You’ll need a rendermanager for the latter though.

Cheers,
Alex

Troyan Turner

Excellent, thanks for the quick response, Alex!

Dan

Hello,

I’m looking to build a system from the ground up. I use Cinema 4D Redshift for GPU Rendering. I also want to be able to do some CPU Rendering with Corona, so looking for an all around power house.

Here is what I have in mind, please let me know your thoughts on this system, I’d love suggestions.

1x AMD Threadripper 3960X 3.8GHz 24-Core Processor
1x NZXT Kraken X72 Liquid CPU Cooler
1x Gigabyte TRX40 Designare XL AT sTRX4 Motherboard
1x Corsair Vengeance LPX 128 GB (8x16gb) DDR4-3000 Memory
1x Samsung 860 EVO 1TB 2.5″ Solid State
2x Asus GeForce RTX 2080 Ti 11gb Turbo Video Cards
1x be Quiet! Dark Base Pro 900 Rev. 2 Case
1x EVGA SuperNova g2 1600w Power Supply

My old machine has a RTX 2080 I would like to put in this to add a third card. And in the future, add another 2080Tis to have 4 Video Cards.

I do a ton of volumetric lighting in my renderings.

Please let me know your thoughts on this build. Again, any suggestions are welcome, if any of it is overkill, happy to bring it back to something that makes more sense.

Thanks for the help!

Alex Glawion
Alex GlawionCGDIRECTOR

Hey Dan,
Great pick of components, I see no issues! Both redshift and corona will run nicely with those specs. Just make sure that if your old 2080 is an open air cooled card it is mounted as the last (with room to breathe) of your 4 gpus once you have them. Blower style cooled gpus perform better when in tightly stacked configs as is the case in a quad-gpu config. Also your old 2080 should optimally be 2-slot in height as are the asus turbos that you listed in your build.

Cheers,
Alex