Video cards for 400W PSU

Discussion in 'Power Supplies and UPS's' started by GER, Oct 7, 2008.

  1. GER

    GER Geek Trainee

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    Hi guys I'm new here and this is my first post. I'm need regarding my PSU, here we go:

    I was looking to buy a 9800gt, I currently have the GMA950 (i know, it sucks big time), but then I got informed with the issue that it needs a 400w PSU as a minimun. My PSU is 400w but the 12v is quite low its amperage is 12A. here's what it says on the cover ATX 400W P4

    +5V=>30 A

    +12V=>12 A

    -5v=>0.5 A

    -12V=>0.8 A

    +3.3V=>26 A

    5VSB=>2 A

    I don't know how many rails there is, can it be known from the above? anyways the question that I'm interested in is what card can I run error-free with this PSU; my system is:

    Dual core 3.0Ghz (930 Presler)

    2 sticks 512mb 667 ddr2 (thisnking of upgarding to 2 sticks of 1gb)

    Intel 945Gz motherboard (gma950 and Realtek audio on board)

    LG 20x DVD-RW

    120Gb maxtor HHD

    2 side fanes 12mm

    So what cards can I get for this PSU, i guess there's no way to handle the 9800gt, can it handle the radeon 3850 or 4850? Please note that I don't care about high resolutions for gaming, 1280*600 is more than enough for me considerning my 15" monitor.

    Any help would be greatly appreciated.
  2. Pimp

    Pimp Captain of USS Defiant

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    I don't think that PSU will have enough juice to power the 9800GT along with a C2D and other stuff in your rig, can't you upgrade the PSU??? a Hiper 580watt costs like £45
  3. Big B

    Big B HWF Godfather

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    12A on the +12V? Uhh, no, you don't want to even try to run anything within the past 2-3 years on something like that. Back in 2000, that might've been fine, but not today.

    These days, you want something with at least 30A on the +12V if you're running a CPU past the Pentium4/Socket A Athlon era, not to mention a video card that runs off PCIe. AGP might buy a little more room, but even so, that amperage is so little, if you don't want problems, you need to invest in a new PSU.

    Here's some brands to check out:

    beQuiet (Europe)
    NorthQ (Europe)
    PC Power & Cooling

    Something at least 450-500W should cover this. A good PSU will not be some light box. It may not weigh a ton, but there needs to be some heft to it. Secondly, you do not want to go with the cheapest option. A PSU quality can somewhat be determined by the price. A cheap unit is more likely to not provide your needs and just use the wattage as a marketing tool. A more expensive unit, combined with heft should be filled with better components for a higher quality signal, not to mention better overall lifespan.

    Of course, don't forget to look at the amperages. ;)

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