Update: AMD and Microsoft have released patches to fix the TSC-drift problem. Read page 2 to find out where to get them.
The latest and newest in CPU technology is dual-core: this means having two CPUs on a single chip. Like real multi-processor (SMP), this greatly enhances processing power, among other benefits.
Unfortunately, there's a downside, called TSC-drift, causing serious trouble with certain applications and games.
All the above symptoms have usually one thing in common: the longer the system is running, the worse it gets. This is in particular noticeable when benchmarking several times in a row. The first score will be quite "normal" but scores will decrease dramatically with subsequent benchmark sessions.
This little FAQ tries to explain the consequences of TSC-drift and other trouble with dual-core.