Strange NVidia problem

[OldBob]

we have a number of identical computers with the ASUS A8N-VM-CSM mobo that has a built in NVidia 6150 GPU. two of these boxes offer the same problem. After a few hours of normal, low duty cycle use, the video shifts to displaying only wide diagonal bars. Sort of like loss of horizontal sync on old tvs.

I've contacted ASUS, but they never heard of the problem. I've tried swapping memory, power supplies, monitors, you name it. I've run the boxes on a test bench with software to stress the system. After 6 hours at 100% CPU, all is still well. I don't even know how to describe the problem for a google search.

In desparate need of suggestions. Have very ticked off users and supervisors.

TIA

[CCT]

Go here and enter the site and read about that mobo - apparently the southbridge on 'some' gets very hot and a number have been rma'd.

http://vip.asus.com/forum/topic.aspx...Language=en-us

Perhaps, when on the test bench, you have the case open and get better cooling?

[Crastabule]

If they are still in the warranty period, I would just get RMA's for them both. It's obviously a graphic subset or mobo issue, and it's not your job to troubleshoot them to that degree. Make ASUS replace them. If they are out of warranty.. well, at least they are fairly inexpensive boards.