Unfortunately, according to specs, what you have is max for that PC.
Taken directly from manual for C521:
Type 533-MHz, 667-MHz, 800-MHz z (when available) DDR2 SDRAM
Memory connectors 4
Memory modules supported 256-MB, 512-MB, or 1-GB non-ECC
Minimum memory 256 MB
Maximum memory 4 GB
Well someone else had already done it so idk ya know.
Wow $$ ddr2! Looks like thats the best price though. Thanks for the link
True, but also was told about the "how much each slot can handle" story as well. (on the Alienware.) But yeah, just was wondering if anyone else had success with this computer in adding a bit more ram....
Thanks for the help!
If you're running RAM at stock speed and your case has good flow, heat spreaders really add no function. Some people do OC their RAM by changing timings and clock speed and in that case it probably wouldn't hurt, but in general they're not needed.