Quote:
Originally Posted by jetski
Hi,
I have also found an issue with the PC suddenly shutting off*. I have come to the conclusion that this is due to the graphics card over-stressing the PSU. The indicator is that the switch off is instantaneous and nothing is logged as abnormal. This is because the system is shut down before the OS can log what is going on. The next entry int the event log was the system starting again.
What is happening? - the PSU has an "overcurrent shutdown" feature which acts like a fuse and shuts off all power rails if one of the rails starts drawing too much power.
Cause - I upgraded my graphics card without paying enough attention to the rating of my PSU.
How to check? - run a GPU benchmark that stresses the GPU, this should also provoke the shutdown.
This is not a "crash" or driver incompatibility as it has occurred with several driver versions.
OS: XP 32 bit SP3
CPU intel core2 duo @2.83GHz
Memory 3.25 Gb
GPU: MSI N460GTX
PSU max 19A on 12v rail
*depending on BIOS confic,such a shut-down may cause automatic restarting.
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Thx, Jetski.
Makes absolute sense and fits my suspicions.
I recently changed the PSU fan and did wonder about the amperage rating compared to the GPU spec., but left it, because it hadn't caused any problems before (largely on Rise of Flight and Arma 2 @ high settings).
Only CoD has stressed the system enough to expose the weakling PSU.
OK, time to fork out some more cash on a new PSU to be followed shortly by a new GPU.
Ho hum.
R
04-17-2011, 11:53 AM
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