4x AMD Powercolor Red Devil 570 4gb
1000W PSU
Older XFX XFX nForce 680i LT SLI motherboard
4gb DDR2 RAM
Intel cpu
3 GPUS power-on and mines no problem, but this motherboard has 4x PCIE so I try t use all for and the computer POSTS but when Windows attempts to begin loading (right before the windows graphic appears after the post) the screen goes kinda black nothing comes up and some white squares appear (sort of looks like a graphical error).
The system pulls 650W mining with 3 GPU, so I dont think its the PSU. Also the error does not occur in a certain PCIE slot, but will occur if I plug a 4th 570 into the motherboards last open PCIE slot regardless. All 4 cards are connected on risers, with sata and 8 pin pwr from psu also, however again this startup problem only occurs when the 4th 570 is plugged into the mobo PCIE. All 4 570's are on risers.
Whats the problem?
Any ideas ?
I could try the system with 4 1060's and see if it happened with them as well, but besides that i'm not sure what the problem could be.. old mobo? nvidia mobo with amd cards ? bios? pcie problem with 4? not sure...
Thanks