Replacement PSU - SLI GTX 770's

[thel33ter]

My Corsair CX600 died sometime between going to bed last night and waking up this morning which kinda sucks, so I'm going to use the opportunity to upgrade to a PSU that isn't awful, and future proof it so I can SLI sometime soon.

Requirements are at least semi modular and capable of powering 2 GTX 770's, 3 drives and preferably the rest of the computer as well And budget is reasonable as possible cause student.

I was looking at either of these, but I'm leaning toward the Be Quiet while its still cheap. Any other suggestions/Would these be enough?

YOUR BASKET
1 x Seasonic M12II EVO Edition 850W '80 Plus Bronze' Fully Modular Power Supply £79.99
1 x BeQuiet Pure Power L8 730W '80 Plus Bronze' Modular Power Supply - With 120mm Silent Wing Fan Built in £79.99
Total : £169.58 (includes shipping : £8.00).

 

[kefan77]

EVGA G2 850W
Superflower Leadex 850W

 

[thel33ter]

What does the £30 premium on those provide over either of the ones I found, 80+ ratings nonwithstanding?

 

[kefan77]

semi passive mode, longer warranty, better internals, full modularity.

you would be fine with 750W versions, but little more headroom never hurts.

 

[pastymuncher]

Quality, both are gold rated and a longer warranty (in the case of the EVGA 10 years). The Seasonic you picked is their budget model and is not a particularly good unit that get's noisey. The Bequiet is also not a very good unit and is pretty weak on the 12v rail only being able to deliver 660w on it.

A 750w psu would be enough for 770 sli and still have power to spare. EVGA Supernova G2 750w is what I would go for.

 

[thel33ter]

Doing some very vague maths, 750w assuming a draw of 250w from each GPU plus everything else will be really tight. Hence looking at ~850w.

I'll eat baked beans for the next few weeks and probably will go for the EVGA 850w gold G2 Supernova thing. 10 year warranty plus I prefer the way it looks.

Cheers Guys

 

[pastymuncher]

This review says total system power consumption of 552w with 770 sli on a X79 system. People massively over estimate how much power they actually need.

 

[thel33ter]

NVIDIA recommends at least a 600 Watt power supply with a minimum +12V current rating of 42A for one GeForce GTX 770 video card. Since each card has a 250W TDP, it is safe to assume that you should have a 850W or larger power supply for a setup like this.
Read more at http://www.legitreviews.com/nvidia-...d-nvidia-surround_2210/11#TZ5M0RzapkPrGCWr.99

Bottom of the review says that. Although I'd agree that a 750w sounds fine from those numbers.

I'll have a think, the 750w G2 is a chunk cheaper. But PSU's are most efficient at 50-60% load so you can argue for both sides.

 

[ShivP]

That M12II is a quality unit, don't be put off by the 80+ Bronze rating - it's very good for the price. Yep, ideally it'd be better to go for an EVGA/SuperFlower but Seasonic built stuff is definitely up there with them

 

[kefan77]

it's not. S12 II is old platform, it can't compete with the new offerings from EVGA, SF.

 

[ShivP]

it's not. S12 II is old platform, it can't compete with the new offerings from EVGA, SF.

True, but for the price it's still good right?

EDIT: Just going by the jonnyguru review

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=356

Seems decent enough?

 

[kefan77]

for 80 quid? not really.

below 70 maybe.

note, I'm not saying the unit is bad, it's just priced too high.

I remember that 750 SF being on offer for like 77 not long ago.

 

[pastymuncher]

Shivy, we had quite a few owners of the Seasonic on here slating it because of the noise. Most went on to replace it.

 

[ShivP]

Shivy, we had quite a few owners of the Seasonic on here slating it because of the noise. Most went on to replace it.

Thanks for that info, never knew that! Don't think I'll recommend that anymore then