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PSU for HD 4890

I'm getting a free HD 4890 from a friend, and so I'm also shopping for a better PSU. Newegg has a sale on this one, and I'm wondering if it will do the trick in my system.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371034

Antec's PSU calculator says the wattage is okay, and a review of the HD 4890 says I'll need 32 amps on the 12v rails.
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  1. I doubt this PSU will work for you unless it delivers the full 33 amps. on the 12v rails. You may want to check www.jonnyguru.com or www.hardwaresecrets.com for a review of this exact model PSU and see what they show for 12v rail power on the two combined 12v rails.
  2. Best answer
    You would probably be ok with that but you may want to consider the 500W version, a little more money up front but only $5 more expensive after rebate.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371035

    There's also this 550W that should fit the bill and again, only slightly more expensive after rebate.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371016

    I have the 4890 in my system currently (waiting for the new ones at the end/beginning of the year) and I remember it calling for a 500W or better PSU when I bought it. Just a thought.
  3. Guys, the 380W version of that PSU will handle his system. I'd probably get the 500W version because after rebate they are the same price.
  4. HD4890 is a bit of a beast power wise. It can use over 200w, close to 250w if you overclock. Certainly wouldn't try to run it on the 380w myself. The 430w may work but you'd be pushing it pretty hard which is generally not a good idea.
    I'm not seeing many good PSU deals on newegg right now. I'd probably go for this;
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
    or this if the rebate doesn't matter to you;
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371030
    Don't be confused by the 520w vs 600w, they both have the same amount of power on the +12v rail which is what matters.
  5. jyjjy said:
    HD4890 is a bit of a beast power wise. It can use over 200w, close to 250w if you overclock. Certainly wouldn't try to run it on the 380w myself. The 430w may work but you'd be pushing it pretty hard which is generally not a good idea.
    I'm not seeing many good PSU deals on newegg right now. I'd probably go for this;
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
    or this if the rebate doesn't matter to you;
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371030
    Don't be confused by the 520w vs 600w, they both have the same amount of power on the +12v rail which is what matters.

    +1
  6. 250W? The PSU that the OP linked in the OP can do 384W on the 12V rails, more then 100W then a system with the 4890 will use. How big of a buffer do you want him to have??? I think the 380W will do 29A (don't remember) which is 348W. Exactly how much overkill do you want him to have?
  7. Yeah, really wasn't planning on overvolting at all, or spending more than $50 on a new PSU. And how could the card use over 225w when it's only plugged in to two 75w six-pin connectors? I don't think I'll be pushing the 430w PSU to its limit, but I might get the 500w Earthwatts if there's a really good reason.
  8. System, not card. First, keep in mind that the card can draw up to 75W from the PCIe slot as well. So its total possible draw is up to 225W. Going from this site the maximum power draw for this card is 190W.

    http://hothardware.com/Reviews/PowerColor-Radeon-HD-4890-LCs/

    Assuming that's the case, and adding another 100W for the CPU and up to 50W for the rest of the system, you're looking at around 340W max. That sounds really high to me for some reason. 380W might not be enough, the original linked PSU should be fine however.
  9. jessterman21 said:
    Yeah, really wasn't planning on overvolting at all, or spending more than $50 on a new PSU. And how could the card use over 225w when it's only plugged in to two 75w six-pin connectors? I don't think I'll be pushing the 430w PSU to its limit, but I might get the 500w Earthwatts if there's a really good reason.

    It'll give you more overhead, and the pair of 6 pin power connectors needed for the card, for the same money after the rebate.
  10. I won't be overclocking, and probably not replacing my 65w cpu with a 95w Phenom II X4 until I upgrade my card to an HD 7850 or so. (The HD 4890 was a happy and unexpected stop-gap solution for the games I own, while I'm saving to upgrade to a more powerful 100-150w current/next-gen card.) So I'll save myself the hassle of waiting an eternity for a rebate gift card.

    And check this out, everyone:

    http://www.tomshardware.com/reviews/phenom-ii-overclock-graphics-card,3032-14.html

    I'm positive my 65w + 190w setup will not draw more wattage than Tom's overclocked build. (125w cpu + 150w gpu)
  11. If you want to objectively, accurately and scientifically determine what PSU power is required for your Vid card and PC in both watts and 12v rail amps., the forum Utility link below will show you how easy it is to calculate this information and objectively determine which PSUs are quality built, reliable PSUs that can meet your needs.

    http://www.tomshardware.com/forum/314712-28-please-read-determine-power-required
  12. so why amd recommend a 500 watts minimum requirements psu,and the first form antec on ther lis is a Earthwatts EA-650 (650W) .other view look at this for a 4890 reviews and test http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/18549-ati-radeon-hd-4890-roundup-asus-diamond-his-sapphire-xfx-24.html
  13. So again, as i said in the other thread, let's assume the following and do some math
    the OP has
    CPU (high end quad core overclocked) consumes 141W
    RAM 2 sticks each consume 4 = 8W
    say OP has 2 HDDs = 20W
    2 ODD = 16W
    Add in card = 8W
    5 fans including CPU = 15W
    MOBO OCed = 55W
    GPU 200W (maximum power board for the HD 4890, Not OCed)
    Total = 463W

    So basically a 380W PSU wouldn't help

    The OP might not have the above configuration, so technically a 380W PSU should work just fine but it will be pushed to the limits, the PSU will work hardly 24/7 which will cause the capacitors & Coils to heat up and the PSU will crack immediately.

    And as i said in the other thread, diff PSUs don't deliver the same wattage to each system..


    Thanks to dirtyferret for pointing me to the source ( http://www.tomshardware.com/review [...] 916-7.html )
    Someone correct me if i'm wrong.
  14. The problem is that your assuming 122W for the rest of the system. That is an amazing amount of power. Here is a review of the 4890.

    http://www.guru3d.com/article/radeon-hd-4890-review-test/5

    Notice they hit a max of 370W, less if your not OC'ing. I already said you shouldn't use the 380W, the 430W is fine. Use the 500W Domin linked seeing as it's the same price.
  15. That PSU is good enough for the 4890 and looking at your sig the rest of your system shouldn't use too much power. You'll be more than fine with that PSU. My only issue is that you only have one PCI-E connector on that PSU so you will have to use a 6-pin to molex adapter for it. For that reason I would go with the 500W version of that PSU

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371035
  16. 4745454b said:
    Notice they hit a max of 370W, less if your not OC'ing. I already said you shouldn't use the 380W, the 430W is fine. Use the 500W Domin linked seeing as it's the same price.

    I saw a lot of reviews and i know how the HD 4890 consumes power, but taking the assumption of overclocking CPU, GPU required me to remove the idea of getting even a 430W PSU.

    Anybody should add plenty of wattage to his needs in case of future upgrade.
  17. Okay, well I won't be consuming that much wattage, since I have a 65w CPU, 1 SATA HDD, 1 case fan, 4 sticks of DDR2, 1 DVD drive, a non-overclockable Dell mobo, and no additional PCI cards... The only upgrade I plan is a non-overclocked 95w Phenom II X4 (mobo cannot handle more), and a GPU that requires only 1 power cable. But +1 for the link, beenthere - even the strong 430w Earthwatts doesn't have much amperage headroom. Annnnnd I found $10 in my wallet.

    This card was a gift, so I said SURE - 50% more performance for free? Sign me up! Anyways thanks for all your help - I'm getting the 500w Earthwatts b/c of the amperage headroom in case I decide to clock the mess out of the 4890.
  18. Best answer selected by jessterman21.
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