Hello,
I plan to build a new computer that will be, amongst other things, used for rendering purpose.
My question is about the PCIeLanes. I already read older post but i'm not quite sure about the answers provided.
As i want 3 GPU (and may be a 4th later, but 3 will be nice) i'm not sure what CPU to choose because of pcieLanes.
If i go for mainstream like Ryzen 3900x i will have only 24 lanes. With a PLX motherboard like this Asus ( https://www.asus.com/Motherboards/Pro-WS-X570-ACE/) i will have 8x8x8. But won't be able to put 4 graphic cards on x8.
The question is : what about drop of power with x4 instead of x8 (i m not taking care about the loading time of the scene). I read that x8 vs x16 is quite the same., but could not find some test about x4 vs x8. To make matters worse someone told me that even x1 won't make any difference while rendering....