Since my previous machine heated too much and crashed all the time, my employer (KDAB) got me a new HP Pavillion t3350 machine, with a dual-core Athlon 64 X2 (M) 3800+ 2.0 GHz CPU - very nice :)
The support for the ATI Radeon Xpress 200 chipset (and the SATA harddisk, apparently) is a bit new in Linux - the last version of Mandriva didn't really have a recent-enough kernel for it (although it had some backported patches it seems)... I didn't get it to work. So I decided it was time to try another distro - for the first time in my life, being loyal to my former employer up to now :) - and this is how I installed KUbuntu 6.06 beta2.