Ram speed and size

ABHINANDAN JAIN (CA Student) (886 Points)

27 August 2011  

My P.C is having 256 M.B size of RAM and 80GB HDD space. For increasing space i'm going to buy External Hard drive, but for data transfer i need to increase RAM size also. So pls suggest me which brand is best for RAM. Ny RAM type is DDR2...?
pls help..?

Also

I have 4 slots available in my computer, Out of 4, 3 is empty. Each slot can hold 1 Gb of space. Also i heard that if i buy RAM crossing the existing limit of RAM, then i t will not support..do u know about this.
Can anyone pls help me out in determining the speed of my RAM.