PSU for GTX 580 SLI

[TissueBox]

Hi everyone!

I'll be getting another GTX 580 to play around with SLI since I found a deal on it - I'm wondering if my power supply will be able to handle it for just for a few benches, and maybe a few sessions of Battlefield 3.

My specs are to the left, and my power supply is the XFX Core Edition Pro 650W with 53A on the +12V rail. I bought it around last September.

I know I'll be pushing it, but I'm wondering if it'll work for just a little while.

Thanks!

[Crap Daddy]

Might work but no overclocking on CPU, RAM or GPU. I repeat "might"... For your machine as it is right now in your specs (overclocked) and another 580 I'd say an 850W is questionable.

[AhokZYashA]

i think an 850W shoulb be sufficient.
as 650W will be pushing it too hard

[NdMk2o1o]

Not at all, the cards can draw 627w alone. That's ALL of your 53 amps right there.

Mind you thats without power limiting but even still a 650w unit would be pushing it, I'd recommend a decent 800W unit.

http://www.techpowerup.com/reviews/N...80_SLI/23.html

[Bo$$]

800watt would be the right choice. 650 is REALLY pushing it here especially if you are pushing an overclock too!

[ShiBDiB]

800-850w and ull be just peachy

[nleksan]

I got an NZXT HALE90 850W PSU from Newegg on sale and before purchasing, I read probably two dozen reviews on it and many more on its competitors (OCZ ZX850, Corsair HX850/AX850, Seasonic Platium X850, etc), and I can honestly say that I believe that the NZXT HALE90 series is top of the line, and is as good as or better than the aforementioned competitors. It has a very stable output with extremely low fluctuations and actually performs incredibly well under high temps (JohnnyGuru and his hotbox). Add to that the fact that numerous test sites have pulled more than its rated wattage from it (as much as 950+), safely, and I think it is a "hidden gem" so to speak.
Also, it was introduced before the 80+ Platinum rating was available, so it is rated Gold; its efficiency is only a hair below platinum (0.1% under common loads).

I have no doubt that it would support SLI GTX580 cards plus an overclocked cpu, even some liquid cooling pumps.

Not to sound like a fanboy, I am not (only when it comes to BMW lol), I just think that the HALE90 series is overlooked and underrated by most.

[Fourstaff]

If you cut your overclock to stock, and never run any benchmarks/stress tools/anything more stressful than a game, I would say you have a few week's worth of time before the PSU degradation hits home and kill everything.

Edit: Peak power draw from gaming is 444w, and the 2500K at stock don't take more than 150w with any load, so you are about 600w if gaming is the most intensive you do.

[TissueBox]

Thanks everyone,

Is there really no hope at all other than upgrading my PSU? I know that it's rated for continuous 650W, so it should be able to do a more than that.

If it's a no, I'll be selling my old one off then

[Fourstaff]

Originally Posted by TissueBox

Thanks everyone,

Is there really no hope at all other than upgrading my PSU? I know that it's rated for continuous 650W, so it should be able to do a more than that.

If it's a no, I'll be selling my old one off then

Yes you can use the PSU, but its quite risky and even a small degradation of 10% will easily send your entire rig to heaven.

[TissueBox]

Originally Posted by Fourstaff

Yes you can use the PSU, but its quite risky and even a small degradation of 10% will easily send your entire rig to heaven.

If you put it that way - I won't risk it. A few benches isn't worth the money if that happens.

Thanks!

[Law-II]

Hi

This - http://www.geforce.com/hardware/tech...power-supplies
SLi Certified Power Supplies.pdf

Note: These are the models that have been tested; this may not be an exhaustive list but can be used as a guide

atb (all the best)

Law-II