I'm still having the same problem but I found some information that might help in the event viewer.
I was playing F.E.A.R. and my computer shut off at 4:27 pm...here is the info from event viewer:
Event Type: Information
Event Source: ACEEventLogSource
Event Category: None
Event ID: 0
Date: 7/7/2007
Time: 4:27:01 PM
User: N/A
Computer: BILLY-CFEF947DB
Description:
0000000001: 2007-07-07 16:27:00:500 Failed to merge manifest file: C:\Program Files\ATI Technologies\ATI.ACE\skins\ccc-skins.xml with exception: Could not find file 'C:\Program Files\ATI Technologies\ATI.ACE\skins\ccc-skins.xml'.
Error Called by: ATI.ACE.CLI.Foundation.MergeManifest::ReadManifest processID:00508 threadID ) domainNameccc.exe ) assemblyNameCLI.Foundation.XManifest, Version=2.0.2665.42240, Culture=neutral, PublicKeyToken=90ba9c70f846762e)
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Event Type: Information
Event Source: ACEEventLogSource
Event Category: None
Event ID: 0
Date: 7/7/2007
Time: 4:27:15 PM
User: N/A
Computer: BILLY-CFEF947DB
Description:
0000000002: 2007-07-07 16:27:15:984 Exception <Load>: Could not load file or assembly 'file:///C:\Branding.dll' or one of its dependencies. The system cannot find the file specified.
Exception Called by: ATI.ACE.LOG.Foundation.Implementation.Branding::Lo adBrandingResource processID:00508 threadIDCCCThreadNew:Systemtray) domainNameccc.exe ) assemblyNameLOG.Foundation.Implementation, Version=2.0.2720.25311, Culture=neutral, PublicKeyToken=90ba9c70f846762e)
************************************************** ************************************************** ********************

Event Type: Information
Event Source: ACEEventLogSource
Event Category: None
Event ID: 0
Date: 7/7/2007
Time: 4:27:16 PM
User: N/A
Computer: BILLY-CFEF947DB
Description:
0000000003: 2007-07-07 16:27:16:062 Exception <atixcode.dll>: Retrieving the COM class factory for component with CLSID {981145A7-E08E-48F3-A1C4-52C28BCAAAF9} failed due to the following error: 80040154.
Exception Called by: ATI.ACE.CLI.Aspect.TransCode.Graphics.Shared.TC_Co mponent::CheckTrancodeComObject processID:00508 threadIDCCCThreadNew:Wizard) domainNameccc.exe ) assemblyNameCLI.Aspect.TransCode.Graphics.Shared , Version=2.0.2665.42198, Culture=neutral, PublicKeyToken=90ba9c70f846762e)
************************************************** ************************************************** ********************


These 3 errors came up right when my computer shut off and I have no idea what it means....If you could let me know what all this means it would be greatly appreciated. Thank you for your ongoing support

I played the game F.E.A.R. with the side panel off for 29 minutes and then the computer shut off...the game usually plays for about 15 minutes with the side panel on. I have a Radeon X850 XT Platinum Edition pci express Graphics card and ATI Silencer 5 (Rev. 2) for cooling. I also had the latest drivers then reinstalled and used the omega drivers with no luck. I thought it could be my psu since i bought it for only 30 bucks and it is a 480w colorsit but I just dont want to buy another one if it isnt the problem. If this is an overheating issue what do you recommend?