I have an evga classified sr 2 motherboard. Take care of this mb because ifvyou have two xeons installed and need a quad cg config, you will need two have at least a 1500w power supply! If not, you will not able to run four graphics cards but just three of them

Unfortunetly, I have only a 1200w power suplly and it is not sufficent to power two xeons 5650 and four evga 580 3gb. So I have to deinstall one Gcard... If I want to keep the four gc, I would have to remove a xeon!
Work Station : MB ASUS X299-Pro/SE - Intel i9 7980XE (2,6ghz 18 cores / 36 threads) - Ram 64GB - RTX4090 + RTX3090 - Win10 64
NET RENDER : MB ASUS P9X79 - Intel i7 - Ram 16GB - Two RTX 3080 TI - Win 10 64