Gigabyte mobo trouble with Corsair memory

[Knazoo]

My mobo is GA-MA790FXT-UD5P, and I'm using a Corsair dual channel kit, ddr3 1600mhz 7-8-7-20 timings, 1.65v (here it is on newegg). Cpu is Phenom II x4 955.
Problem is, I can't get the ram to run at it's normal timings!
Best i could get so far is 8-8-8-24! Please..any tips?

 

[saint19]

U only can get that times with OC in the FSB.