No, your computer requires DDR2. It's a matter the two different DIMMs being compatible together, stable within the system.
Well... this is weird, i installed both 2gb sticks and had a total of 4gb ram, but my windows 7 says i can only use 2.75 of them and i thought that it was because o fthe 4gb limit on 32bit, so i took out the 2gb 667mhz and instaled a one 1gb 667mhz from my moms laptop, and it still says that i can only use 2.75gb out of 3, any ideas for that?
EDIT, i did test all the configurations winth the Win7 points system,
4gb (2.75usable) ddr2 800 & 667mhz gives a score of 5.5
2gb ddr2 800mhz gives a score of 4.9
and... at last and worst 3gb (2.75 usable) ddr2 800 and 667mhz gives a score of... 4.9