I know this is a bit off topic (not totally because there's info on the SiS 540/630 etc chipsets), but I wanted to share this info because I am sure some of you might have been looking for it like i was ... I found this site and it had quite a few PDF's that I was unable to get my hands on from the companies themselves. So fsck them for not giving us docs. Here they are thanks to the boys in Ukraine (?): http://ic.doma.kiev.ua/pdf/chip/cpu.htm Free, encrypted, secure Web-based email at www.hushmail.com