psu for 2 980's in sli

peter tron

peter tron

peter tron

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my maste has this:

Seasonic X750 750W.

it's about £140-150.

can anyone weigh in suggesting if this is too expensive, and are there other psu's at 750w that are better and less money.

if not, i might have to take the plunge, as i really going to shell out on this new build.
 
A decent 750w psu would be enough but no need to spend that much. Either of these will see you good:-

My basket at Overclockers UK:


​

The XFX XTR 750w is a Seasonic built with a single 12v rail of 744w and a 5 year warranty. Review here.

The Corsair RM750x is a CWT built unit with a single 12v rail of 750w and it has a whopping 10 year warranty. Review here.

The Superflower Leadex Gold 750w is built by Superflower themselves and has a single 12v rail of 749w and has a 5 year warranty. Review here. Be aware that it has bright white led's where the cables plug in and they cannot be turned off.

The EVGA Supernova G2 750w is built by Superflower and is basically a Leadex Gold with a different fan, no tacky led's and the warranty doubled to a whopping 10 years. It has a single 12v rail of 749w and there is a review here.

The Superflower Leadex Platinum 750w is built by Superflower themselves and has a single 12v rail of 749w and a 5 year warranty. Review here. It also has the bright white led's where the cables plug in that cannot be turned off.

If it were me buying I would have to go for either the Corsair RM750x or the EVGA Supenova G2 750w due to the 10 year warranties on both.
 
wow!

cheers for the speedy response, not to mention the info of your reply.

well, based on what you mentioned there, i think the evga will be a great purchase.

...and saved myself £10-£15 in the process!!

i'm planning to buy some other gear as well, so if you're up for it?

if you have a spare moment and could weigh in with some purchasing advice? ;)

baz
 
What's the rest of the system apart from the 980's? My 5930k and titan x sli will pull just over 800W from the wall under heavy load. This is verified by my UPS.
 
It's gonna be close if your using an enthusiast CPU like HoneyBadger, im only using a quad core and i can pull over 800 watts at the wall fully overclocked. I imagine if you maxed out them 6+ core CPUs you can really burn some juice.
 
i'm just ordering all the gear.

Intel Core i7-6700K 4.0GHz Quad-Core Processor

Asus MAXIMUS VIII HERO ATX LGA1151 Motherboard

EVGA GeForce GTX 980 4GB Superclocked ACX 2.0 [1 i have already]

EVGA SuperNova G2 750W '80 Plus Gold' Modular Power Supply [just ordered].

NZXT H440 (Black/Red) ATX Mid Tower Case [just ordered].

Acer XB270U

i was probably looking at installing one of these for each 980 if in sli:

ARCTIC COOLING ACACC00019A Fluid Dynamic VGA Cooler, A Multi-compatible Air/Liquid Cooler for Graphic Card -GTX 980 [for noise & heat reduction].

i was gonna grab 16gb of some decent ram, too.
 
A 750w unit is easily more than enough for that. The 980's pull nowhere near as much power as the Titan X. I checked reviews before I recommended 750w and the highest figure reached in reviews was 567w and that was with a overclocked 5930k. If it was 980ti's then I would have recommended 850w but not for the more power efficient 980's.
 
Hey i need to chime into this.

I have an 850 powering two 980ti's and yes it covers it fine

But damn its fan is almost full power keeping the unit cool, maybe its just mine. But its the loudest thing on my pc
 
BluD said:
It's gonna be close if your using an enthusiast CPU like HoneyBadger, im only using a quad core and i can pull over 800 watts at the wall fully overclocked. I imagine if you maxed out them 6+ core CPUs you can really burn some juice.
Click to expand...

yeah exactly. I think he should rma it and get a 1k gold
 
pastymuncher said:
A 750w unit is easily more than enough for that. The 980's pull nowhere near as much power as the Titan X. I checked reviews before I recommended 750w and the highest figure reached in reviews was 567w and that was with a overclocked 5930k. If it was 980ti's then I would have recommended 850w but not for the more power efficient 980's.
Click to expand...

Oh its 980s not 980tis, dunno why but my eyes just read 980ti, yeah they're way less demanding looking at they're tdp, should be plenty of power.
 
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pastymuncher said:
A 750w unit is easily more than enough for that. The 980's pull nowhere near as much power as the Titan X. I checked reviews before I recommended 750w and the highest figure reached in reviews was 567w and that was with a overclocked 5930k. If it was 980ti's then I would have recommended 850w but not for the more power efficient 980's.
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Would 650W be OK with 2 x GTX980s and a 4790k overclocked TO 4.9Ghz?
 
What make and model? Personally I would want 750w for the extra headroom. That 4790k at 4.9Ghz must be sucking a lot of power too. The closer you run a psu to it's max output the hotter and noisier it will run.
 
pastymuncher said:
The closer you run a psu to it's max output the hotter and noisier it will run.
Click to expand...

Yeah if youve spent a lot of money getting a silent system then you wouldnt want a PSU running at full pelt, i've noticed they're sometimes more prone to coil whine in that situation also. If your on a tight budget and ya just trying to reuse a PSU so you can upgrade GPUs etc then your probably not gonna mind an extra fan adding to the mix. Your right to ask the model, i looked through an old chart of loads of power supplies from through the years and i was amazed at the difference in power actually supplied by two units claiming the same wattage.
 
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Thats showing as 610 watts on the 12v rail so if Pasteys 567w draw for the 5930k and sli setup is to go by then you should be technically ok, but like he said already you'll be pushing it a little, it might run very hot and noisy. Also it would depend on if they allowed for the PSUs efficiency, if they just read the power draw at the wall then youll have a bit more power to spare.
 
Cheap internals, ripple on the 12v rail are the main reasons but it also has mediocre reviews, only 3 years warranty and is overpriced. There are far better Gold rated fully modular 750w units available for similar money or less. If you look to buy Corsair go for one of the excellent RMx units with their 10 year warranties, otherwise look at EVGA and Superflower.
 
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