memory upgrade

[MAXIBOY]

running a gigabyte ds4 board..

am i better just adding another 2gb of

GeIL 2GB (2x1GB) PC2-6400C4 800MHz Ultra Low Latency DDR2 Dual Channel Kit (GX22GB6400UDC)

for 25 quid that i have in four slots

GeIL 4GB (2x2GB) PC2-6400C4 800MHz Black Dragon DDR2 Dual Channel Kit (GB24GB6400C4DC)

or this at twice the price in two slots

or will it make any difference.

 

[MAXIBOY]

thanks ordered...