Re: RAM Performance
^^ what wolvarine said..
What MOBO are you using?
The extra ram, being used in a dual core mobo, will be nicer, than an extra 100MHZ, which you wouldnt notice an improved performance anyway.
As a rule of thumb, I try to use the same types of RAM (make and model), and prefer working in even numbers E.G, 2Gb 4GB 6GB etc, as you normally get the best performance out of them then.