I assume I have a enough power. I have a BeQuiet System Power 550W. Those are quite energy effiecient (80+ certificate - Bequiet says, they have an efficiency of up to 87%).
But if the power supply would be too weak, why does the graphics card run much faster, once the driver has crashed? If it's not getting enough power, it should be unstable for the whole time, shouldn't it?
After the crash, it runs nice and smooth for hours, whitout any sign of a problem.
I've used various calculators which came to the conclusion that a recommended PSU should provide between 426w and 470w (with assumed 20% capacitor aging). Except the BeQuiet Calculator that recommends at least a 600W PSU, but I think they just like to sell there more expensive line.
I'm not sure if this are the actual PSUs those calculators recommend, or if this is the wattage it recommends after taking the PSU efficiency into acount. If that is the case, it could be quite on the fringe with an assumed 87% efficiency (478 watts from my 550w PSU).
I put in the following specs:
intel i5-2500k @4.2 Ghz, AMD Radeon HD7850, 2x 4GB DDR3 RAM, 4 SATA HDDS (2x Green HDDs), 1x SSD, 4x 120mm fans, 1x Soundblaser Xfi, Mouse, Keyboard, + 2USB Joysticks, plus the occasional external USB harddrive.
So again, if this is too much (which is possible), why does it work without any problems after the graphic drivers have crashed? I'd really like to evaluate my options before I buy another 100-160 EUR PSU. How likely it is that it is really the PSU? I don't question you, but I'm just wondering because it bugs me for quite some time now.
03:07 PM by