Best way is to follow the Tested memory and hardware list. If you use Kingston, please take note of the last letter "I" in the model number, which indicates validated on Intel boards. I'm afraid non-ECC memory is not supported.
alright.. is the proper behaviour for KVR1333D3E9SK2/8G to only work in a 8gb config? Like I said, I cannot get it to boot with four of these memory chips in the board, only two.