This may seem like a really stupid question to somehere .... but ... right I want to upgrade my RAM from 1 gb to 2 gb. The installed memory sticks are 512 DDR2 SDRAM PC4200/4300 533 mhz.
Can I install 2 1024 MB PC6400 DDR2 800 Mhz EPP Memory? Or will this %&() up the system? The processor is an AMD Athlon 64 X2 Dual Core Processor 3800 2Ghz. and mainboard has a 4gb capacity.

Thanks

you could go to crucial.com,they can scan your pc tell you what ram you have and what you need.i got 2gb for $44

Are you running 32 or 64 bit Vista?

To get over 3 gigs you need a 64 bit operating system.

Thanks for the information!