PC beeps while kernel loads and other issues
First thing, I tested this with latest drivers from the 17*.* series as well as drivers from the 180.* series, so this is probably I general issue. Before I had an XFX Gefoce 8800 GT (factory-OC), and with both series, everything was fine, no problems at all. Since I got the XFX Geforce GTX 260 Black Edition (factory-OC again), I have quite some instability issues:
When booting Linux, the PC (sometimes, like every 3rd or 4th boot) starts to beep very high and rapidly when the kernel loads. This sometimes ends after 5 oder 10 seconds, and sometimes just goes away when I reboot. Another issue is, that sometimes (but not very often) it boots up fine, and when Xorg loads, I get a very tiny resolution (a "ctrl + alt + backspace" usually helps then).
Those are the Linux-only issues I have. Another last issue is on Linux as well as on Windows. After some time of running a 3D-game (10 minutes to 2 hours), it can happen that the screen suddently stays there in a single random color. No reaction at all from the system, and a reboot via the reboot-button of the PC doesn't help. In that case I have to do a cold shutdown via the power button and then start the PC again.
This doesn't look like a heat problem to me, as the GPU temperature stays in the area of 60-70°C. Nor does this look like a power problem to me (I have a BeQuiet PSU with 550 Watt, 42 Ampere on the 12V lines).
In the first moment I thought about a defect GFX card, and just sent it back to the shop, but they tested it and just sent it back to me with the notice "No errors found". I don't know if their tests are just not sufficient and the card is probably still defect, but who knows.
Thanks in advance for any kind of help,