Simple RAM Upgrade Question?

u better purchase two modules of 4GB these will suite u more and will less prone to errors, whereas, four modules of 2 GB may cause compatibilty eroor.

Your Mac Book only has two ram memory module slots you need two 4 GB memory modules of the same brand and spec's. Go to http://www.crucial.com/ and run the tool to find what it now has, max system will support, correct memory modules for upgrade then use Crucial or what ever brand you prefer.

Based on my perdiction that yo have an i5 processor @ 2.53Ghz, according to crucial website it can support up to 8 gigs. There are ONLY 2 slots, so if you want 8 gigs, you have to do with 2 X 4gig modulus DDR3 @ 1066. if im incorrect on my pediction check

http://www.crucial.com/uk/index.aspx?cpe=chawkuk

all RAM modules must be of the same speed, size doesn't really matter, but a matched pair of modules can have minor performance gains. Although i would be cautious about sizes.

i hope helps :)

buying two 4gb cards will be a better option in this case as it will not be that complicated it will be easy to install and if you have any hardware error then it will be easy to find it.....

Go to crucial.com, the site scans your computer and can sell you what you want.