HI all, I have an old PC which i want my daughter to learn on, and i want to update it a little by upping the Ram for her. I popped the side off and there are 2 slots, one has 1gig in, and the other has 512mb, trouble is they dont match in the numbers stake. Here is what i mean. The 1gig module is a PQI DDR2 667u The 512mb Module is a M 512 DDR2 PC2-4200u-444-12-zz 533 CL4 The MB is an Asus P5VD2 NVM/S and i cant find any definitive specs on this old board. I want to buy 2 new ram modules so they match and i want a 2gig and a 1gig, so can anyone advice on what specification DDR2 ram i need for this board please. I will be using 32bit vista if thats any help. Kindest regards, Lee.