Must I upgrade my PSU if it has 12V1:18A, 12V2:15A for 24A current requirement?
Posted on 2007-07-26
I own a Antec 480W NeoPower power supply. I am considering buying a graphics card (XFX GeForce 8600GT Fatal1ty 256MB GDDR3) that requires a minimum current of 24A on the +12V rail. The Antec PSU has 12V1 rating of 18A, 12V2 rating of 15A. Will this support the card I am considering or will I require a PSU with at least 24A on a single rail?
I have seen on the OCZ product pages that their well-known GameXStream power supply uses 4 x 12V rails, each with 18A. Does this mean that the relatively new OCZ power supply is unsuitable for the entire GeForce 7-series and 8-series cards? I doubt that, but I don't have the facts. The answer base here at Experts Exchange doesn't seem to have a detailed explanation of how the 12V rails get divvied up with respect to feeding both CPU and graphics card requirements.
Can anyone explain this to me? My Radeon X850 graphics card recently died and I need to know if the PSU needs replacement to support the new card. I would rather not make the additional purchase.