help me choose a psu

Zuban · 21 Jul 2012 at 18:45

Toying with the idea of upgrading my psu in readyness for going sli. I have a build to do for a freind and can pass him one of my psu's cheap to cover part of the cost. Currently using a antec high current gamer 620 watt.

pc spec is

3930k
16gb
gx670
single ssd and two 1tb hd's
xspc 750 water cooling kit.

when overclocking i've seen it use as much as 480watts at the wall under full load, and thats without loading the gpu. What i'm looking for is a modular power supply, no specific budget but preferably around £150 willing to go more if required, dont want to spend more than i have to, but want to get the right thing. Capable of running the 3930k at 4.6-4.8ghz and two gtx 670's in sli. I have about 7 fans and will probably be adding more drives and memory in future if it makes any difference. Thanks in advance.

RJC · 21 Jul 2012 at 19:15

http://www.overclockers.co.uk/showproduct.php?prodid=CA-000-XF&groupid=701&catid=123&subcat=1497

Indy500 · 21 Jul 2012 at 22:10

Either of these will be fine:

http://www.overclockers.co.uk/showproduct.php?prodid=CA-149-AN&groupid=701&catid=123&subcat=

http://www.overclockers.co.uk/showproduct.php?prodid=CA-004-XF&groupid=701&catid=123&subcat=

750W is more than enough for two GTX670s, they're much more efficient than their predecessors in the 500 series. The only reason I haven't suggested a 650W instead is because I can't find any in the store that have 4x 6-pin PCI-E power cables.

tamzzy · 21 Jul 2012 at 22:49

the best 750w in ocuk atm:

YOUR BASKET
1 x Corsair Professional Series AX750 High Performance 750W Modular '80 Plus Gold' Power Supply (CMPSU-750AXUK) £129.98
Total : £140.48 (includes shipping : £8.75).

or this should do fine too

YOUR BASKET
1 x Corsair HX 750W ATX Modular SLI Compliant Power Supply (CMPSU-750HXUK) £99.98
Total : £110.48 (includes shipping : £8.75).

Indy500 · 21 Jul 2012 at 22:52

They're excellent in terms of quality\performance but you pay a huge premium that IMO isn't justified. It's not like the HCG and Pro Core aren't Seasonic on the inside as well.

tamzzy · 21 Jul 2012 at 23:03

hcg 750 is by delta
the pro core is a m12 rebadge
not that they're in any way not good
they're pretty good

Indy500 · 21 Jul 2012 at 23:09

tamzzy said:
hcg 750 is by delta

Of course, my mistake.

tamzzy said:
the pro core is a m12 rebadge

Yeah, which is a Seasonic platform.

tamzzy said:
not that they're in any way not good
they're pretty good

Right, so why spend so much more on the Corsair? It's not like the PC will actually hit near 750W usage...

tamzzy · 21 Jul 2012 at 23:15

sr4470 said:
Right, so why spend so much more on the Corsair? It's not like the PC will actually hit near 750W usage...

just giving extra options ;p

olivier renault · 21 Jul 2012 at 23:20

Delta Electronics is Top of the Pops in my book.

tamzzy · 21 Jul 2012 at 23:22

cant go too wrong with either tbh (delta/seasonic that is)

Sasahara · 22 Jul 2012 at 12:26

Given the op is using water cooling I'd assume noise level is a consideration.

So the Corsair AX Series would be the one to get if sound level is a major consideration as it doesn't power up the fan until it hits around 20% load.

All Seasonic / Deltas are not the same, you get what you pay for. They just tend not to make bad PSUs.

Zuban · 22 Jul 2012 at 12:57

thanks guys a good few options there, i'm guessing 750w is plenty then? I thought it might need more but this is why I asked, the sb-e cpu's are very power hungry even before adding a couple gpu's!.

Noise is a consideration yes the machine isn't silent but I like to keep it as quiet as possible so i'll look into that ax series and see if its worth the extra to me.