1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

PSU 750W enough for 2x GTX670s in SLI?

Discussion in 'Hardware' started by ModSquid, 2 Jun 2014.

  1. ModSquid

    ModSquid Active Member

    Joined:
    16 Apr 2011
    Posts:
    909
    Likes Received:
    100
    Just a quickie - as the title says, is a 750W PSU enough to run 2 670s overclocked in SLI, plus an overclocked 2500K and all the rest of the usual system gubbins?

    Conflicting evidence on the tubes suggests min 700W or min 850W, so bit wide-ranging.
     
  2. Teelzebub

    Teelzebub Up yours GOD,Whats best served cold

    Joined:
    27 Nov 2009
    Posts:
    15,796
    Likes Received:
    4,484
    Depends on the 12v rails but you should be good
     
  3. ModSquid

    ModSquid Active Member

    Joined:
    16 Apr 2011
    Posts:
    909
    Likes Received:
    100
    Okay - cheers. The two I was looking at are both XFX ones with single rail technology.
     
  4. rollo

    rollo Well-Known Member

    Joined:
    16 May 2008
    Posts:
    7,827
    Likes Received:
    118
    Overkill in truth my own system with 2 680s draws only between 400-480 from the wall ( i7 950 CPU overclocked to 4ghz) sandybridge is more power efficient so you should see less.
     
  5. GeorgeK

    GeorgeK Swinging the banhammer Super Moderator

    Joined:
    18 Sep 2010
    Posts:
    8,649
    Likes Received:
    477
    Yeah - with my rig (OC'd 4770K and SLI 780s) I have this (read using a power monitor thing)

    Idle - 100W
    100% CPU only (just Prime95) - 230W
    100% GPU only (just Furmark) - 670W
    100% CPU and 100% GPU (Prime 95 and Furmark) - 760W

    So you'd be fine :D
     
  6. xaser04

    xaser04 Ba Ba Ba BANANA!

    Joined:
    27 Jun 2008
    Posts:
    2,247
    Likes Received:
    220
    Assuming a good quality PSU with a strong 12v rail you will be fine. I used to run overclocked Asus DCII 670's in SLI on my ToughpowerXT 675w PSU without a single issue.
     
  7. ModSquid

    ModSquid Active Member

    Joined:
    16 Apr 2011
    Posts:
    909
    Likes Received:
    100
    These are actually the ones I'm going to be running, so good to know - thanks.

    Cheers to all, guys. Appreciate the assistance. I've ordered a 750W XFX XXX edition as didn't see the point paying an extra £20 for the Black edition. Heard some tales about fan noise so will see how that goes ("play it by ear", in effect? :D Sorry...had to...).
     
  8. Elton

    Elton Officially a Whisky Nerd

    Joined:
    23 Jan 2009
    Posts:
    8,575
    Likes Received:
    189
    Should be plenty. Also, PSU fan noise usually isn't nearly as bad as people make it out to be.
     
Tags:

Share This Page