Possible memory problem, need assistance

[Donnie the Dinosaur]

Hey, I'm having some issues with most games lagging and sound skipping, eventually having them crash. Ive had this problem for a while and i posted about it before, expect I thought it was a overheating problem.

So anyways, I bought a couple new fans and a new heatsink thinking it would solve my problems, unfortunately it didn't. So now im thinking it may be a problem with ram.

Any suggestions on how to diagnose this problem?

links to my mobo and ram

http://www.ocztechnology.com/products/memory/ocz_ddr3_pc3_12800_platinum_edition

http://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ClassValue=Motherboard&ProductID=3242&ProductName=GA-P55A-UD3

 

[Toasteddude]

Run this program to test your memory.

http://www.memtest86.com/

 

[Donnie the Dinosaur]

Memtest and windows memory agree that the sticks I have now are fine, But im wondering if this is just a case of me having not enough memory. windows 7 takes like 2gigs or something for itself, so that leaves me with 2gigs free, Thats not alot to work with.