Hi, According to msi's website, specifically; [URL]http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_detail.php?UID=[/URL] 27 This motherboard supports athlon processors up to XP2000. I have just installed an athlon XP1800 and D-LED is giving me four red leds. The machine boots/runs fine when fitted with a 750MHz Duron. I have updated the bios to version 1.9 but still no dice. Does/should this version of this board (1.0 not 1.0A) run an athlon XP? The processor is OK, I reinstalled it in its existing machine to post this message. TIA Geoff 300W codegen PSU 512MB crucial memory as two 256MB modules slot 1+2 ( compatible with the board according to [URL]http://www.crucial.com[/URL] ) Athlon XP1800 (hopefully!) 2 X 40GB seagate barracudas.