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PSU suitable for Crossfire?

Discussion in 'Graphics Cards' started by Ryan-3, 20 Sep 2009.

  1. Ryan-3

    Sgarrista

    Joined: 14 Sep 2009

    Posts: 8,706

    Location: Northumberland

    Hi, I'm getting a PC from a competitor, and its a 700W PSU.

    It's name is **********PC Performance ATX 2.0 Power - Quad SLI Ready


    I know it says Quad SLi, but can I run two 4890's through this in crossfire.

    The PC:
    Core i5 (to be overclocked @ around 3.8)
    XtremeGear HDT 120 Xtreme CPU Cooler (To cool the i5)
    GigaByte P55M-UD2
    4GB OCZ Gold series @ 1600mhz - DDR3
    500GB Hard Drive
    LG DVD Drive.
     
  2. johny dolan

    Wise Guy

    Joined: 22 Jul 2007

    Posts: 1,396

    Location: nottingham

    That mobo supports both sli and crossfire.700 watt psu should be fine for crossfire 4890s but would need more like 1000 watter for crossfire 4870 x2s.Id wait for the next gent ati cards though.
     
    Last edited: 20 Sep 2009
  3. Ryan-3

    Sgarrista

    Joined: 14 Sep 2009

    Posts: 8,706

    Location: Northumberland

    I will hopefully be getting a 5870, depending on the price though.

    What date are they to be released?
     
  4. Laney88

    Hitman

    Joined: 31 Aug 2009

    Posts: 832

    Location: Manchester

    Should be the 23rd from looking at the smiley thread :)
     
  5. rico3

    Gangster

    Joined: 16 Mar 2007

    Posts: 103

    Location: north east

    yeah roll on the 23rd...
     
  6. breadturbo

    Mobster

    Joined: 27 Oct 2005

    Posts: 2,531

    i highly doubt 700w will cover quad sli of quad xfire????

    you planning to stick with just two cards? or go for more later?
     
  7. Nutbusta

    Hitman

    Joined: 4 Oct 2004

    Posts: 790

    The biggest factor is the quality of the PSU. An unbranded (or just naff) 700w PSU will be the equivalent of a 300w good one.

    Take my 600w Enermax (yes, im a fan) sitting beside me waiting to go into my new gaming rig (hurry up ati) it shows 2x18amps on the 12v rail. so 36 amps.

    This is a much better indicator. If your planning on running two modern cards then I'd aim for 40amps.

    The zalman fan controller in my server says its using 180w atm with a 850w akasa (specs unknown as I can't be bothered to take the side off. It's running 5 disks and an overclocked settup but rarely gets loaded.

    The bottom line is never, ever buy a crap PSU. Apart form anything else, if it fails it could take out anything and possibly everything else! :O
     
  8. breadturbo

    Mobster

    Joined: 27 Oct 2005

    Posts: 2,531

    just had a scan of ati spec sheets, for 2x 4890s in Xfire they recommend 600w+ premium psu, and 52 amps plus rest of system (cpu hdd etc)
     
  9. Ryan-3

    Sgarrista

    Joined: 14 Sep 2009

    Posts: 8,706

    Location: Northumberland

    Okay, thanks. I'm only going to run two so i should be fine. I don't use mega amounts of storage so the 1 hard drive will be all that needs to be powered there :)