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What power supply should i get for 5770 Xfired

i having trouble finding a cheap power supply that can run 2 5770's crossfired. i want something under 90$ but this is the best i could find

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5592468&sku=D15-1212


does anyone know how much A on the 12v rail a 5770 needs? iv heard i need a single 12v Rail with at least 50A for crossfire, but is that true? or can i just get this one which has two 12v Rails with 34A on each? i really cant afford a Corsair or any of the other really good brands
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More about what power supply 5770 xfired
  1. No ! Don't take this power supply. It's not a good brand of power supply. In real you won't have 900 watts with that. You will be able to meet any problem as stability, crash system and other... I advise you Corsair, be quiet, Enermax, seasonic...

    Add a bit money
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3438609&CatId=2533
  2. http://www.techpowerup.com/reviews/MSI/HD_5770_HAWK/28.html
    a single 5770 uses like 100W (edit and thats like 8.33 amps @12V)

    a 500-600W unit with 'strong' 12V rail(s) will work just fine, multi or single rail doesn't really matter...

    ocz modxstream 600W, 500W on the 12V rails
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4362114&CatId=1483
    http://www.ocztechnology.com/images/awards/mxsp_wattage_charts.jpg

    ocz z-series 650W would be a bit overkill, but looks like good deal
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5344847&CatId=1079
  3. You don't wanna play w/ "cheap PSU's when Xfiring, especually when OC'ing.

    To find out how big ..... go here:

    http://www.antec.outervision.com/PSUEngine

    You'll find that each 5770 will require 51 watts of power.

    ATI says:

    http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-5000/hd-5770/Pages/ati-radeon-hd-5770-system-requirements.aspx

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

    To find out which one to buy, start here:

    http://www.silentpcreview.com/Recommended_PSUs

    This Antec Earthwatts 650 ($79) gets a 9.0 performance rating on jonnyguru.com
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371015
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=110

    The Corsair HX620 ($129) gets a 9.5 performance rating on jonnyguru.com
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139002&Tpk=HX620
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=21

    Seasonic x-650 ($159) gets a 10.0 performance rating on jonnyguru.com
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=169
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151088&Tpk=Seasonic%20X-650
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=113

    I couldn't find the OCZ z series 650 watter on jonnyguru but they do have the 850 watter and it got an 8.5
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=167.

    Best choices are the Antec Earthwatts 650 ($79) or the Corsair TX650 ($99 - $20 MIR). I'd avoid the rebate hassle and take the Antec.
  4. CrysisComa said:
    i having trouble finding a cheap power supply that can run 2 5770's crossfired. i want something under 90$ but this is the best i could find

    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5592468&sku=D15-1212


    does anyone know how much A on the 12v rail a 5770 needs? iv heard i need a single 12v Rail with at least 50A for crossfire, but is that true? or can i just get this one which has two 12v Rails with 34A on each? i really cant afford a Corsair or any of the other really good brands



    ok thanx everyone, im going to choose a better brand then the link i posted. but what im wondering now is does it matter if the power supply i choose has more than one 12v rail? what is the difference between a power supply with one 12v rail and a PSU with say three 12v rails? can each video card only feed off of one 12v rail? or does the number of 12v rails not really matter?
  5. CrysisComa said:
    http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=10010350

    what about this PSU? is this a good company?


    :non: it's not a good company :)

    goods company are : Antec, Be Quiet, Cooler Master, corsair, Enermax, Seasonic, OCZ, XFX, Zalman, Thermaltake, Silverstone ;)
  6. I personally bought the Antec Greenwatts 650w 80certified PSU that was linked to earlier in this article for 5770x2 crossfire setup.
  7. clement4413 said:
    :non: it's not a good company :)

    goods company are : Antec, Be Quiet, Cooler Master, corsair, Enermax, Seasonic, OCZ, XFX, Zalman, Thermaltake, Silverstone ;)



    ok i have narrowed it down to 5 power supplys. if someone could take the time to look at these and tell me which one is the best for Crossfired 5770's but keep in mind im trying to save as much money as possible.

    OCZ ModXStream Pro Power Supply - 700-Watt
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4362115&CatId=106


    OCZ StealthXStream 700-Watt Power Supply
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4294708&CatId=106

    Thermaltake TR2 W0388RU 600W
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4294708&CatId=106

    Antec EarthWatts EA650 650W
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371015

    OCZ OCZZ650 Z Series Power Supply - 650-Watt
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5344847&CatId=1079
  8. Of the 5 that you listed, Antec is the best one.
  9. Best answer
    OCZ Z650, She has got 80 plus silver label while the antec haven't got.

    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5344847&CatId=1079
  10. Best answer selected by CrysisComa.
  11. Check jonnyguru reviews on all of them

    OCZ z series gets an 8.5 performance rating
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=167

    Antec gets a 9.0
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=110

    The themaltake link is to an OCZ

    OCZ EvoStream gets a 9.0 but that's not on ya list
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=26

    The OCZ GameXtream gets a 7.5
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=24

    Of what ya listed, the Antec seems to be the highest rated.
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