Hey guys, new to registering but I've been a lurker for awhile lol. Anyways, I have perhaps a neophyte question about a computer I'm building.
What I want to do is get two EVGA GTX 570 cards and run them in SLI. Well, from the specs on the card, it says it needs 550w and at least 38 amps on the 12v rail. If I SLI these, would that then need 76 amps on the 12v rail or need to use another rail entirely? I'm just unsure whether it combines, or, because both only need 38 amps the one rail that has that will cover it.
Any enlightenment will certainly help me tremendously.
single or split 12v rail makes no difference as long as the power supplied is sufficient to meet your needs. you also don't need 76a since the recommendation for a single GPU takes into account your CPU, HDD, etc., and you don't need to double that again unless you are sunning a mobo that has two CPUs.
guru 3D says you will be under 600w at load
Measured power consumption
System in IDLE = 218W
System Wattage with GPU in FULL Stress = 578W
Difference (GPU load) = 360W
Add average IDLE wattage ~ 50W
Subjective obtained GPU power consumption = ~ 410 Watts