Sorry about the Link, I forgot Search links are only good for a certain amount of time (All I did was search OCZ3*
You asked, and I answered. I say this because it is true. And as for QVL lists, here is Gigabyte's and you will see they list only 1GB sticks for OCZ 1600 compatible >>>
http://www.gigabyte.com.tw/FileList/...a-x48t-dq6.pdf
Please do use the search feature here and first search for OCZ* as I said above then search about X48T and you will see what memory issues it has with what sticks like use X48T*
Mushkin does make Many DDR3 kits, here they are >>>
Mushkin - Enhanced Performance Memory
4 Newer Models here
Ascent - Revolutionary eVCI Technology has Arrived
I am only giving you advice that you asked for what would be better or compatible so I advised you from what I know of helping here in 70+ pages of support with the mentioned brands.
See this post and you may think again before you decide >>>
Could GA-X48T-DQ6 be the cause of random BSODs and failed stability testing?