I'm almost certain it is. Sometimes when I load quake III (maybe 10-20% of the time), it either kicks me back to windows when its loading the game or when its loading the game media for a stage. This didnt happen until I went to my 7200 rpm maxtor so it looks pretty obvious. My PS is an Antec PP-253X (something like that) and its only 250W and im running a tbird system. Just seems strange since it only seems to do that in quake and nothing else (I also play UT, why not kick me out of that?)