Overclocking Issue

I have been playing Left 4 Dead recently and really like it. I am running an overclocked 8600m GT DDR3 at about 650 core 1300 shader and 900 memory. After about a half hour or 45 minutes, my m1530 will simply reboot. I thought it was a temperature issue so I was running both ATI tool in the background and hwinfo. The GPU core temp never got above 72 degrees. Without running my card overclocked, my framerate takes a HUGE hit. In Crysis, running at these settings I get much higher temps, at or slightly above 80, but the laptop doesn't restart. It's plugged in to an outlet and hooked up to an external display currently. Any ideas?

 

Sounds like a faulty GPU...without the overheating. May be an inherently bad chip. Have you changed any drivers or updated your BIOS?

 

Does it have the same issue if you don't OC it? If not then it may not be heat related if in fact the temperatures are OK as much as it may just be that quality of the GPU is only so good. When it reaches a certain frequency it will eventually fail. I feel that you may be riding this fence right now. Un "OC" your GPU and if you do not have the issue any more then there is your answer. Keep us posted.

 

Also note that the memory does not have a sensor and that overclock may be causing the memory to overheat.

 

I will have to do an hour or so of testing in L4D without the gpu oc'd and then see what happens. Maybe a driver update would make a difference?
The bios was recently updated in the past few days. I also think my dell software may have updated the videocard driver. It still allows me to OC it though, so maybe the update was not successful for some reaason?
Looks like this issue is going to need some more testing. Maybe it is for some reason a specific issue with left 4 dead? I just think it's odd that my temps are so low yet the card seems to be having problems.

Dire, I knew about the lack of the memory sensor. My memory clock was originally a tad higher, lowering that by itself didn't seem to change anything. I just assumed that since the core temps were so low, maybe the memory temps would be acceptable as well.

Thanks for the help guys, I'll try to do some testing tomorrow.

 

Temp slitely above 80 should not cause your system to restart.It maybe, a problem with the system RAM as well....Get the Microsoft debugging tool and have a look at the generated minidumps.

 

I think (can someone confirm) that there were several cases of 8600m GT and/or 8400m GT GPUs that burned out after having a memory clock around ~900. Just a friendly warning .