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Thread: Power supply for CF 7950

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    Default Power supply for CF 7950

    Hi,

    I'm currently using this sentey 850w however I think it's a very cheap psu.

    I was thinking in buying an EVGA 650w GQ

    My config is

    GA 990fxa
    AMD 7950 vapor-x
    AMD 7950 vapor-x
    AMD FX6100
    8gb of ram.

    I always had an old 7950 and the cheap psu, a friend of mine sold me his 7950 and I think I should switch to a better psu.

    Should I move to a 750w? 650w gives 54ams on 12v and both card requires around 50amps.

    Should I keep the sentey? it gives like 70amps on 12v...

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    EVGA GQ 650W will be fine for your system. Its a great overall psu.

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    Sentey does have some PSU's that aren't bad. And this one looks a bit like a High Power/Sirtec/Sirfa through the fan grill, so it could be OK.

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    Quote Originally Posted by Delter View Post
    EVGA GQ 650W will be fine for your system. Its a great overall psu.
    Completely depends on overclocking and usage case. I have loaded a 2600K@4.8GHz and a single 7970@1.3GHz to 762W (at the wall) with a Corsair AX850.

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    How did you do that?
    And didn't CPU and/or GPU explode??

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    With some good custom water cool loop it should be doable.

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    Quote Originally Posted by -The_Mask- View Post
    With some good custom water cool loop it should be doable.
    A 360mm and a 240mm radiator with in a system with 10 fans not counting the PSU. Also a pair of Laing D5 pumps. 99% of the time, the fans are spinning at 400RPM or not at all.

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    Quote Originally Posted by -The_Mask- View Post
    Sentey does have some PSU's that aren't bad. And this one looks a bit like a High Power/Sirtec/Sirfa through the fan grill, so it could be OK.
    Well I tried with two cards and the sentey psu.
    With two cards 12v drops to 11.85v at full load on both cards and cpu %100 also.
    I can't open the psu to avoid losing warranty, but caps are taepo (at least the big one).
    If I compare with another seasonic psu that I have the board is small.

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    Quote Originally Posted by -The_Mask- View Post
    With some good custom water cool loop it should be doable.
    Yeah, but that's not what I meant. Tahiti isn't that bad normally.
    So with almost 800W with a single card and single CPU system seems rather bold to me (means something like MSI Lightning 7970 and brutal overvoltage like 1.5V or so - Default for a 7970GHz is around 1,256V, possibly 1.2V (I have two Gigabyte, one 7970GHz, one 280X the latter indeed has a slightly lower core voltage.))

    Same for the CPU...
    It could be in the 200-350W range maybe...

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