Hi JD, >To be honest, I don't have a clue as to what my mother board is. It is the= >standard that came off the shelf with an HP 751n. I'll look around to see >if >I can figure out what it is. I went to the hp site and put 751n into their search, and it came up with= the specs for the Pavillion 751n model... is that the right model? If so, you are limited to PC1600 and PC2100, according to the information= on this page http://h20015.www2.hp.com/en/document.jhtml?lc=3Den&docName=3Dbph07368 Sorry :( Ron - Users can unsubscribe from this list by sending email to 24hoursupport-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field OR by logging into the Web interface at http://webpages.charter.net/chizotz/