Solved Which ram for Biostar G31M+ motherboard?

I have a Biostar G31M+ motherboard []G31M+ :: Motherboard :: BIOSTAR.
And my previous ram got burnt. Now I am forced to buy a new one. So, here is the question.

Which ram should I buy? DDR2-667/PC2-5300 or DDR2-800/PC-6400 ?

What is the difference in performance and will my motherboard support it? These are 2GB modules and so I'm planning to put in total 4GB ram. Will my motherboard work fine with all this?

Also note that, both the above mentioned RAMs cost the same. So, it doesnt matter which one, financially.

The link you provided says it supports 2 Dimm slots, 4GB max. for the board. The DDR2-800 memory is probably faster although you will probably not notice the difference. This is their QVL list for approved ram for that board. 2GB ram sticks are scarce on that list.