2GB of DDR2 enough for windows 7

[jordan282]

i currently have 2 x 1gb GeIL low latency ddr2 800mhz
is this enough? I would say that im a gamer but not hardcore
im using windows 7 pro 64 bit

my specs

abit ip35 pro motherboard
q6600 cpu

 

[jordan282]

if i add another 2 x 1GB sticks but not the same i.e still ddr2 at 800mhz but different timings would it work?
4GB is so exspensive
What 4GB wold you also recomend?