Posted 07 August 2012 - 05:07 AM
Posted 07 August 2012 - 09:40 AM
It may be that the Graphics card draws a bit over 20A in normal use which overstresses the PSU.
If the graphics card tried to use the full 38A, I would have expected the PSU to shut itself down...or not start up at all, in which case the PSU may be merely resting.
Posted 07 August 2012 - 10:21 AM
It certainly isn't clearly specified on the PSUs documentation, either, so I guess this is a new situation.
Posted 07 August 2012 - 10:53 AM
Therefore, you'd need PSU with a capacity something greater than that, say about 650W.
It can be a problem if you upgrade the graphics card in an OEM PC like HP/DELL/ACER etc, where you may find that a generic PSU does not work.
Posted 07 August 2012 - 12:52 PM
Posted 07 August 2012 - 02:36 PM
750W should be adequate for any single graphics card.
What else have you got attached? USB arc welder?
What's usually going on when the PSUs die?
Posted 08 August 2012 - 06:15 AM
IF your vid card requires 38a and is only able to draw 20a that is a recipe for disaster likely burining out the PSU like you have seen..your lucky you have Only fried a PSU or two..
Try that Calculator and that will get you in the Ballpark and set the Both CPU load and System load on 100% and 15% Capacitor aging.. Then determine the Amperage needed on the 12v 1st, 5v 2nd, then 3.3v 3rd.. Also get a Single 12v Rail..
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