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Recommend me a PSU for my system SLI GTX 680

  • Power Supplies
  • Gtx
  • Intel i5
  • Components
Last response: in Components
May 21, 2012 3:23:18 AM

I5 2500k 4.7Ghz (may go i5 3570 soon)
NZXT Phantom
8 GB 1866 G.Skill
H70 (may go H100 soon)
Gigabyte UD5H Z77
2X 1TB WD black HDD
Plextor 128 M2P SSD
5 case fans not counting pushpull for the H70

Current sporting a HX750, but I have a bad feeling that this PSU won't last long!

More about : recommend psu system sli gtx 680

May 21, 2012 3:34:17 AM

that's a wattage calculator, add 75-100 more watts to the recommendation and that should do it.
a c 1657 ) Power supply
May 22, 2012 1:51:04 AM

For a system using two GeForce GTX 680 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 750 Watt or greater power supply that has a combined +12 Volt continuous current rating of 53 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

The Corsair Professional Series HX750W (CMPSU-750HX), with its combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two GeForce GTX 680 in 2-way SLI mode.
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May 22, 2012 11:18:57 AM

I would say about the same thing as "ko888" did above. Also, 750 watts is kind of low with little room to grow. Personally, I NEVER skimp on power supply brand quality or room to grow a bit more. Yes, the 750 as mentioned will work, but I would go with the Corsair or Silverstone line in about the 1000 watt range for your system to use now and grow a bit too.
a c 165 ) Power supply
May 22, 2012 11:30:25 AM

actual facts by experts to back up ko's recommendation (your current PSU) and disapprove inaccurate noob opinions of needing a 1000w PSU and wasting people's money :pfff: 

Measured power consumption two cards in SLI

Core i7 965 with all cores clocked at 3.8GHz
Motherboard -- MSI Big Bang Xpower X58 SLI compatible
Memory -- 6144 MB (3 x 2048 MB)
128 GB SSD for storage
Corsair Obsidian 800D chassis
Two GeForce GTX 680 graphics cards (reference speeds)

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

Mind you that the system wattage is measured at the wall socket side and there are other variables like PSU power efficiency. So this is a calculated value, albeit a very good one.[/i]

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

the corsair HX750 is an excellent PSU capable of exceeding it's 750w label and will do the job with no issue.