Okay, I've discovered something strange. I just found out that I had a bad stick of RAM. I had 4 GB in total, which Vista can put to good use. After removing 2 GB (to allow the computer to continue running in dual-channel mode) the remaining memory appears to be okay, but more importantly, <img src="/ubbthreads/images/graemlins/beyond.gif" alt="" /> is running at full speed! <img src="/ubbthreads/images/graemlins/eek.gif" alt="" /> <img src="/ubbthreads/images/graemlins/bday_jump.gif" alt="" />

Now I have to weigh up the pros and cons - a new set of 4GB RAM, or <img src="/ubbthreads/images/graemlins/beyond.gif" alt="" /> at full framerate?