Quote Originally Posted by DerekT
Update:

I have just received the 8500C5's for my 6400C4's. These have no problem with the 1000Mhz.

However, I have them running at 800MHz with 3 - 3 - 3 - 10 (2.3V)

Thanks Corsair,

Did you ran memory test for those timming, my can't do 800MHz 3-4-4-9 , 2.4V . It got error when run memtest86