Well, I was thinking about staying with the stock bios, but the same strange 3D problems started to occur, when I did more benchmarks this night.
I reassmebled almost all of my hardware, including the reinstallation of my VGA Silencer and changing the CPU cooler (that Thermalright SI-97 is broken, heatpipes are cold, temperatures are high - has happend already to a few friends of mine
). After that I reinstalled my favourite Catalyst 4.12 (DriverCleaner in the meantime) and 3DMark2001SE.
Now - everything seems fine apart from that damned benchmark. Aquamark 3, GunMetal Benchmark, 3DMark03 and 05 and those very few games I've got. PC is both Prime and Memtest86+ stable - I've given up.
The only thing that seems to lighten that darkness, that has crept over my PC, is the fact, that Merlin's bios is fine.
