All of this is new as of two weeks ago, everything was bought retail except the MB which was Ebay'd as "New in Box". I orignally tried with Windows XPwindows xp , but have sense gone to vista as part of the trouble shooting.
I have a problem with reboots, no BSOD, no errors i can find, no Event Viewer Entries, and no MB logs(that i can find). The screen goes black, the monitor goes orange, then comes back to green as it boots up normally.
I have seen these reboots randomly, and every single time i try and load Unreal Tournement 3.
-after making a change to Catalysthttp://en.wikipedia.org/wiki/Catalysis control center of downgrading AA and AF by one notch and pressing "OK"
-Dureing the Windows XP loading screen, about 5 seconds into it. This has occured multiple times, some times in a row. I have not seen this sense Vista was installed.
-After boot uphttp://en.wikipedia.org/wiki/Booting in XP, and going into the control panel straight away
-Twice at random points while useing the Sporehttp://en.wikipedia.org/wiki/Spore creature creator.
-At a random point while useing the desktop in Vista.
Unreal Tournament 3:
-As the program starts it displays the copyright info, then reboots before the spam of company logo animations occurs.
-Commenting out the logo animations gets me in game, however the moment i click start game it reboots, and i mean the moment, the loading screens comes up but is gone before you could even read a word of it.
I have tried all the Stickied things on the UT3 forums, none of which worked, and the other reboots that act the same cause me to believe its not a UT3 issue, though UT3 is the only repeatable reboothttp://en.wikipedia.org/wiki/ReBoot .
The game has been reinstalled multiple times, and patched.
I have used 8.5 drivers that came with the Vid card, 8.6 Hotfix from their site, and finnally the 8.7 recently released. I have cleanly removed them all before installation.
I tried 3Dmark's newest tests, and saw a reboot once at the start of test 3(CPU test), but it completed it successfully 4 times after that one reboot with no changes made.
What DOES work:
-i swapped my ATI 4850, with a freinds Nvidia 8800. And the game worked, i did not see a reboot outside of it while it was in, but the out of game reboots like i said are not repeatable, though they did happen frequently enough.
---the kicker is he put my ATI 4850 in his machine at the same time, and it worked for his UT3 just fine....no tweaks, 8.6 hotfix drivers.
-I upped the Voltage on my Ram a decent amount(at work atm, i can get the exact amount later, but it was a good amount that was still within OCZ's handling quote). This fixed UT3, runs great at the highest possible settings even, however certain maps will load for a bit then reboot the machine dureing the load.
While the ram voltage is a decent work around, i dont believe this addresses the actual issue.
I have run Memtest and after an hour and half it had zero errors, also i've sense found that it will reboot with half life 2 episode 2, dureing the opening sequence, it will actually go through more of it the lower the settings, until it finnaly plays the whole thing...
I don't want to highjack your thread in any way, shape, or form, but I am having similar issues with a similar set up. It might be helpful for you to see what I have done, what has been recommended, and what input people will hopefully have for me...