GTX 580 question

[Jatta Raso]

trust me, you need a new PSU. i had a NOX (not he greatest i know) 630W, brand new, bought a GTX 570 (Phantom, Gainward, not the 570 reference layout, consumes roughly as the 580) and whenever my GPU was stressed my system would power off; analyzing with GPU-Z, i'd read in the log that the power down would always occur after a few minutes over 95% GPU stress, when the card was at its peak of power demand

i found that this happens mostly because as the video card tries to get more power for its needs, the under-powered PSU probably diverts energy that is needed for the CPU or MOBO, and as the MOBO detects that as a dangerous power fluctuation, for stability's sake shuts down the system to prevent damage.

that never happened with CLoD (that was back in march) as it never showed that much GPU demand, but with Crysis, Crysis 2, Witcher 2, any recent power demanding app, it was a constant... i'd get 5-7min play then blackout.

then i decided for a new Corsair TX 850W, 115€ here in euroland, but worth every cent; never regretted its cost, first class quality, all problems gone for good