Quote:
Originally Posted by Rattlehead
Duly noted.
But I had an 8800GTX, with a 530w Aopen PSU, and the rest of the system was the same as in my sig.
My PSU was taking strain, no doubt about it. It was runinng hot and the fan was spinning like mad. It didn't do that with my older 9800 Pro.
The PSU was about two years older than the card at the time, which might explain my problem, but there you have it. The system was not overclocked either.
Maybe someone can explain it?
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I suspect in my case (similar to you) when I upgraded from a GTS250 to the GTX560ti my 750W PSU suffered overheating and the fan full bore after a few minutes of CloD. It seemed Ok with the GTS250. I replaced the 750w with a Coolermaster 600W with an identical 12V power ratings of 480W. Having stripped the 750W and tested it on a bench the main difference compared to the Coolermaster is the Heatsink size. The Coolermaster has a much larger heatsink and different alloy composition. The fan in most PSU's is controlled by Heatsink temperature. The smaller heatsink on my 750W must have been dissipating more heat with the GTX560ti in full bore and the fan rpm increasing to compensate.
When I tested the 750W under load it couldn't regulate the 12V supply and the voltage was fluctuating possibly due to prolonged use at high temperatures or a just poor PSU by design.