What power supply do i need for 2 HD5850 crossfired

i am thinking about upgrading my single 5850 to a crossfire set up. my current psu is only a 550w so i think that this is nowhere near enough.(correct me if i am wrong) so i was thinking that i should upgrade the psu as well. i was thinking of a Antec Truepower 850 or 1000w psu is this sutable. and can you give me any other possibilities.

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  1. Well, what is your budget?
    I would suggest you this one:

    Yes, that's 750W, more than enough for dual HD5850, but with that PSU i'm sure you will stand for a long time before buying a new one... :)
  2. "Coolermaster" are not a good brand (although they are not the worst brand). id say a 700-750w good brand PSU, corsair, antec, silverstone, that will give it plenty of breathing room. The antec truepower 850 is more than enough. I think there is a "truepower NEW", which is the one to get, not the older model.
  3. wa1 said:
    Well, what is your budget?
    I would suggest you this one:

    While that is a great PSU a 650w by Corsair should be more than enough. This one is a very nice deal;
    Just $51 after the promo code and rebate. Can't beat that. If the OP really wants a 750w of a good brand despite that is really isn't necessary then this Antec unit is a good deal;
  4. ^+1
    Great deal, jyjjy... :)
  5. If your from the UK overclockers UK have got the corsair tx650 for 75 quid, just got it myslef, runs my 5970 perfec so till will easily run ur 5870 crossfired. as dip said above OC it youl need 700-750W.
  6. http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-5000/hd-5850/Pages/ati-radeon-hd-5850-overview.aspx#3

    500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode).

    If overclocking, I'd opt for a Corsair TX-650 and either an Antec EA-650 or TP-650. If doing serious overclocks, I'd opt for the Antec Signature Seasonic X-650 or Corsair HX-650 as a minimum. Check here to see just how much of an Overclosk ya can get away with:


    For comparison purposes , the list below contains performance ratings (10 scale) at jonnyguru.com / prices as per newegg on 02/26/2010 and ones w/ double asteris (**) made it onto silentpcreview.com's Editor's Choice List:

    Note: Just because you see a brand name on this list, never make the assumption that their other lines are of matching quality. Silverstone for example has other models w/ 6.0 and 7.0 ratings.

    Antec Signature 650W (10.0) OOS **
    Seasonic X-650 650W (10.0) $160 **
    Silverstone Olympia OP650 (10.0) NFS

    Thermaltake Toughpower QFan 650W (9.5) NLA

    Antec Earthwatts EA650 650W (9.0) $75

    Antec True Power Trio 650W (7.5) NLA

    XFX XPS 650W XXX Edition Power Supply (7.0) NFS

    Antec NeoPower Blue 650W (6.5) NLA

    BFG BFGR650PSU 650W (6.0) NLA

    NorthQ Black Magic Flex 650W PSU (5.0) NFS

    NFS - Not For Sale / NLA = No Longer Available / OOS - Out of Stock
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