Hi all, I currently have a Dell xps 410 desktop machine with 2GB's 677mhz ram installed. I just ordered myself a 4gb 800 mhz ram from play.com. I'm running the latest Windows 7 Release Candidate and the machine is already pretty snappy and fast in every respect but i was wondering if anyone else recently upgraded their ram to the above specs and what type of performance increase was noticed if any at all? Also the dell xps 410 comes with a standard 375 watt psu. I'm tempted to order the new ATI HD4770 that was released today but I believe it requires a 450 watt psu. Do you think the 375 would be suffient enough to power the card or would it be 'dangerous' to attempt it?