Power supply for Sli GTX 680

[Connect2K]

What power supply would be best for sli GTX 680? In fact for any power supply for Sli. Is a Crosshair 750 M enough for a Sli?

[Azza ☠]

Yeah, I assume you meant Corsair CX750M or similar, which has 750 Watts? That's more than enough to power 2 of those beasts (GTX 680s) in SLI (but not 3 of them).

GeForce GTX 680 - On your average system the card requires you to have a 550 Watt power supply unit.

GeForce GTX 680 SLI - On your average system the cards require you to have a 750 Watt power supply unit as minimum.

However, actually calculating the GPU power consumption here, not the total PC power consumption.

Measured power consumption one card:
System in IDLE = 144W
System Wattage with GPU in FULL Stress = 307W
Difference (GPU load) = 163W
Add average IDLE wattage ~10W
Subjective obtained GPU power consumption = ~ 173 Watts

Actual load of GTX 680 SLI (two cards):

System in IDLE = 155W
System Wattage with GPU in FULL Stress = 473W
Difference (GPU load) = 318W
Add average IDLE wattage ~20W
Subjective obtained GPU power consumption = ~ 338 Watts

So there's a lot of free juice to go around, depending on your motherboard and other devices usage.

Just keep a good gap inbetween the two cards if possible for better airflow - this will allow temperatures and noise levels to remain pretty low and stable.

[_I_]

tx750m will be fine

680 = 195w ea max
most system are under 300w
its under 700w total

[Bad 💀 Motha]

I used to have 2x 680 is SLI; used Corsair HX-750 and it still had breathing room.
Worked fine and then finally replaced them with 2x GTX 770 4GB; still using the same PSU, no problems.

And that is with:
AMD FX-8350 (125W) OC'ed to 4.9Ghz
2x 8GB DDR3-1866 1.5V
2x SSD in RAID-0
4x 7200rpm HDDs
8x Fans (if u include CPU fan; Hyper 212 EVO)