PNY OPTIMA 4GB (2x2GB) Dual Channel Kit DDR2 667 MHz PC2-5300

PNY OPTIMA 4GB (2x2GB) Dual Channel Kit DDR2 667 MHz PC2-5300 Desktop DIMM Memory Modules MD4096KD2-667

I first tested my system with the crucial memory scanner tool. Then bought this pair of memory chips from Amazon as it was cheaper :). It works just fine. Just remember that you might have to stagger the memory chips in the slots to make it work.

E.g., If you have 4 memory slots and have 1 GB in the form of 2 512MB RAMs in adjacent slots, it won't work if you put these 2 1GB RAMs in the next 2 free slots. You have to remove one of the 512MB RAMs, put in a 1GB RAM in its slot and insert the 512MB RAM in the free slot next to it. You could put the remaining 1 GB RAM in the remaining slot.