Have you tried running 3 or more 7950s on a motherboard for mining without using any powered risers?
What would happen if the power drawn from the mobo is too much? Would the mobo just fry or would the PC just shutdown unexpectedly?
I ask this because, since a few days i am having a problem where my rig/pc, just freezes.
The cpu fan, gpu fans, mobo LEDs etc all keep running. And my kill-a-watt shows a sharp fall in the wattage (which means the mining has stopped on all cards)
and on the monitor is "check signal cable" error. Oh and my keyboard's Num lock key doesn't turn On and Off as it should.
My rig config ::
Mobo = Gigabyte 990 FXA UD3
RAM = 1 x 8 GB G.skill 1866Mhz
HDD = 2 TB WD Green and 1 x 250GB Samsung 840 SSD
GPU = 3 x Msi Twin Frozr iii 7950s
CPU = 8 core AMD FX 8350 Vishera
OS = Windows 7
PSU = SeaSonic 1050W Gold Rated
Once I tried three unpowered and one of them did not turn on. Then I made one of them be powered and the whole thing worked.
