I installed memory in my last computer and it wasn't that hard. My xp computer recognized the new memory and I had no problems. My new computer: Windows Vista 64 home premium edition, Amd athlon dual core 6400+, 2-3870's crossfired, motherboard msi k9a2cf, 2 gigs ddr2 pc 6400 ram, cooler master 600 watt power supply. I have heard and read a lot of different things about adding ram to my system. The first was that it won't make much of a difference, and I have heard that 4 gigs is perfect for running vista. I also heard that anything over 4 gigs won't do ANYTHING for my system and could actually slow it down. I thought this was the point of Vista? That you could run more ram and it would benefit from utilizing it. Does it make a difference if you mix and match ram? (different brands mixed) Does any ddr2 pc 6400 ram work with my motherboard. I tried to go to the manufacturers website and look it up but they gave me weird brands that I do not recognize. What about dual channel.... is it just a means to put my max 8 gigs in my motherboard or is there a major performance boost.