I finally made it work installing my new Kingston HyperX SSD in my also new Lenovo ThinkPad W520 (with SATA3 interface). The problem was to enable AHCI on a preinstalled Windows XP... tricky!!!! But I made it work. :-)
Anyway... I'm not all happy yet. When I use ATTO Disk Benchmark, I almost get the expected read-speed (545MB/s), but the write-speed is only far lower than 400MB/s. It should be up around 520MB/s.
I upgraded to the latest firmware (version 5.01), and I have the latest Intel chipset drivers.
I read about disabling some C3/C6 settings and so on in the BIOS? I just can't find anything like that in the Lenovo ThinkPad BIOS. I disabled some power management, but that didn't make much of a difference. I attached a screenprint of the ATTO result.
Any suggestion what I can do to make the disk race on full speed? :-)