Friend,

Currently I am using socket 775 E7200 processor wit Gigabyte EP35-DS3 mobo running on Windows 7. Using Corsair CM2X1024-6400C5DHX with 800Mhz and 5-5-5-18, 1.80V. 1Gb x 2 on Dual Channel and would like to upgrade it.

-Can I get 2 x 2GB and add to my system so it become 6GB or get 2x 1GB so it become 4GB?

-Do I need to use back the same ram or any other ram?

Thanks in advance