How can I be sure they are all compatible with each other?

[Jessica]

CGDirector.com Parts List:

CPU: Intel i7 10700k 3.7GHz 8-Core Processor ($344.99)
CPU Cooler: be quiet! Dark Rock 4 ($74.90)
Motherboard: ASUS ROG Strix Z490-A Gaming ATX LGA1200 ($200.19)
GPU: AMD Radeon RX 560 4GB XFX ($179.99)
Memory: 16GB (2 x 8GB) Corsair Vengeance LPX DDR4-3200 C16 ($87.99)
Storage PCIe-SSD: ADATA XPG SX8200 Pro 512GB NVME M.2 Solid State Drive ($59.99)
Power Supply: Corsair CX Series CX550M 550W ATX 2.4 Power Supply ($69.99)
Case: Phanteks Enthoo Pro ATX Full Tower Case ($99.99)
Total: $1118.03

 

[Jerry James]

CGDirector.com Parts List:

CPU: Intel i7 10700k 3.7GHz 8-Core Processor ($344.99)
CPU Cooler: be quiet! Dark Rock 4 ($74.90)
Motherboard: ASUS ROG Strix Z490-A Gaming ATX LGA1200 ($200.19)
GPU: AMD Radeon RX 560 4GB XFX ($179.99)
Memory: 16GB (2 x 8GB) Corsair Vengeance LPX DDR4-3200 C16 ($87.99)
Storage PCIe-SSD: ADATA XPG SX8200 Pro 512GB NVME M.2 Solid State Drive ($59.99)
Power Supply: Corsair CX Series CX550M 550W ATX 2.4 Power Supply ($69.99)
Case: Phanteks Enthoo Pro ATX Full Tower Case ($99.99)
Total: $1118.03

Yep, everything looks compatible to me. You can save some money by dropping down the case and motherboard just a bit. Everything else looks good!