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PSU Graphics Card Compatibility

Hi,

I recently got a free graphics card from a friend

XFX GTX 9800

My system is rather old.

CPU: X4 Phenom 840
Ram: 4 GB DDR3
PSU: Antec Earthwatt 380W Bronze

I installed the 9800 gtx but i only had 1 6pin connector to connect to the graphics card. the card was running but do i need to connect the second 6 pin to get max usage out of the card? if so then would my current psu not be compatible and i need a new psu? thanks for the help!
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  1. that card alone can use 160W of you 380W available...while it might work it will be pushing the PSU very hard. I personally would invest in good brand like you have PSU (Antec Seasonic XFX) but 450W min for ease of mind.
  2. You must power both inputs to the card...I would recommend a new PSU asap. You can get some decent and cheap PSUs from Corsair: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027 [$29.99]
  3. The GTX 9800 has a maximum TDP of 140 Watts, the AMD X4 Phenom 840 has a maximum TDP of 95W, lets consider that everything else in your system uses 100 Watts (Which is too much and not likely), that is 335 total Watts when your system is on maximum usage and that's below your PSU's limit.

    Your PSU's continuous power is 380 Watts, so it can handle your system even if it was on %100 CPU + GPU load.
  4. but essentially i would have to plug in both parts of the GPU to get it working at its full capacity correct? from waht i can see my PSU only has 1 6pin plug so the other one i can't connect even if the wattage requiments were met right?
  5. Best answer
    bintopaulshin said:
    but essentially i would have to plug in both parts of the GPU to get it working at its full capacity correct? from waht i can see my PSU only has 1 6pin plug so the other one i can't connect even if the wattage requiments were met right?


    If your GPU has two 6 Pin connector slots then yes, you might need an additional 6 Pin connector to get its full power, but as I told you, your PSU can handle it whatever.

    I think I have a solution for you WITHOUT getting a new PSU just to get an additional connecter; if you have an additional 4 Pin connector, you can a 4 Pin Molex to 6 Pin PCI-Express PCIE Video Card Power Converter to have an additional 6 pin connector.

    http://www.ebay.com/bhp/4-pin-to-6-pin-adapter (It only costs less than 4 dollars ;) )

    Best,
    MJaoune
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