I have been running around the net trying to figure this out myself but one site says one thing while the other says another thing. I just want to know what is that max amount of RAM my cpu can have installed. Currently it is sitting at 4x1GB for 4GB total.
^ Concur, check the manual and Maziar is probably correct.
Side comment, Total ram is not dependent on CPU, but on MB and operating system.
8 gigs is probably the max you would need anyway as there is very little performance gain going from 8->16 gigs (With the exception of a very few software programs). No gain for gaming.