In technical terms, the full name of DDR2 RAM is actually called DDR2 SDRAM. Your conflicting terminology is actually a mix-up of the same thing.
There are only two things in your situation that you need to worry about when finding RAM to fit your mobo.
1. Make sure the RAM is DDR2 240-pin (this will ensure that it physically fits).
2. Make sure you get RAM speed that your motherboard supports (this will ensure that there are no compatibility issues).
What is your motherboard manufacturer and model? You have listed your specs in your signature but left your your motherboard. Simply Google-ing the motherboard name will get the info on what memory it supports. One way to find out is downloading CPU-Z
HERE. Run it, and look under the "Mainboard" tab.
mitch04 said:
Update: it says its pc2 - 5300 so wouldnt the 1GB DDR2-800 PC2-6400 DIMM RAM 1 GB G 1G DDR MEMORY SDRAM hold on is all DDR2 ram are SD RAM? IM so confused
That part is confusing. First it says it is DDR2-800MHz but then the other half of it says that it's DDR (not to mention it repeats "1GB" yet again). Did you accidentally paste the specs of two products?
If the label of your current memory says PC2-5300 then you'd be best off getting the same thing. Search for DDR2 667MHz PC2-5300 memory.
This way, you're sure it will work.
Good luck.