Impact of dual PCIe 5 x8 vs dual PCIe 5 x16 for dual Rtx 6000 pro max-q
i have an existing system with:
Asus ROG MAXIMUS Z790 DARK HERO LGA1700
Intel Core i9-14900K
G.Skill Trident Z5 RGB 2x48GB DDR5 6800MHz CL34 (x2, 4 sticks in total), right now im running only 2 sticks.
The issue with my motherboard it doesn’t support dual gpu in 16x mode, it changes the pice 5 to 8x.
The alternative is to change to brand new Threadripper PRO that supports multiple PCIe 5 at x16, but it would make the cost much higher than expected at this moment.
My question is: how bad the difference would be between dual 8x and x16 running inference with vllm and graphic generation and LoRA (flux.2, z-image, video generation, etc).
Appreciate the help 🙏