I have a new Powercolor 9700 Pro (Retail) running unclocked. It runs fine until I push it hard, either gaming for about 10 minutes or while looping 3dMark2001SE, for example. The monitor will suddenly display "no signal." Mobo is an 8RDA+ with an OC'd Barton 2500+. Running DirectX9a and CAt 3.2. I uninstalled the drivers, used RegCleaner and deleted directories, dlls, etc. Then reinstalled DirectX and then resinstalled drivers. Same problem. I upped the voltage to the video card to 1.7v. I set it to 4x AGP. I turned off fast writes. I connected to a different power connector. I tried a bunch of things that I picked up on from reading around. Same problem. I assumed this was a driver/setting problem, but maybe it is a heat problem? My case temp is higher with the 9700 pro than with the older 8500LE, but I have a lot of cooling. 4 sucking case fans, including 2 blowing from the side window right onto the mobo, and 2 exhaust fans. I will see what happens when I run the cpu at default settings, but that's not where I want to run this sytem. Other than this, it is rock stable. BTW, I didn't have these problems (same cpu and OC) with the 8500LE. Any ideas? Thanks.