i have the asus M4a785TD-V evo mommyboard with an AMD Thuban 1055T
and the OCZ obsidian tripple kit
It may be due to the fact that your running 3 sticks of memory, AMD does not support tripple channel.
At the very least your hurting performance due to the fact that 3 sticks won't run dual channel.
Pull one stick and see if that fixes your problem...
Pretty sure you should have the sticks in the same colored slots, but check your manual to be sure.
Asus Crosshair IV Formula | 1055T X6 | Mushkin 2x2 1600 @ 1.35v | Visontek 4870/512 | Watercooled | Corsair TX750 PSU | Windows 7 64bit | Corsair 800D Obsidian