poclbm.exe has stopped working

[btcex]

Hello everybody

I'm using GUIminer (4 GPUs / 4 OpenCL miner instances).
This configuration works for about halfe an hour until the system (win 7 x86 sp1) crashes (blue screen) giving me following application error in the eventlog:

Faulting application name: poclbm.exe, version: 0.0.0.0, time stamp: 0x4918019b
Faulting module name: aticaldd.dll, version: 6.14.10.1417, time stamp: 0x4ddc6ce6
Exception code: 0xc0000005
Fault offset: 0x00173158
Faulting process id: 0x4c0
Faulting application start time: 0x01cc2e7a8f5c5267
Faulting application path: C:\guiminer-20110614\poclbm.exe
Faulting module path: C:\Windows\system32\aticaldd.dll
Report Id: e967a688-9a72-11e0-a572-bcaec5325fe2

The Phoenix miner instead of poclbm seams to work but with a lower hashrate (280Mhash/s instead of 340Mhash/s per GPU).

Does anybody have an idea how to fix that?

Thanks in advance!

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[willphase]

perhaps your system is overheating.  Check GPU temperatures

Will

[btcex]

I thought that first but it isn't.

Boath of my Radeon HD 6990 are around 80 degress Celsius warm (fan speed around 40%) so this shouldn't be the problem.

[btcex]

Problem solved: I just had to disable the Windows Aero design :-/