Anyone no how to OC a MSI K8n Diamond Motherboard?

[jt_aus]

I've been reading OC guide after OC guide, I follow there advice and can't seem to get my system to damn overclock!!! Had to flash BIOS 3 times already, which means reconfiguring my RAID 0 setup everytime.
I've tried FSB 275x10, HT multiplier x3
FSB 275x10, HT multiplier x2
FSB 275x11, HT multiplier x3
FSB 280x10, HT multiplier x3
FSB 280x11, HT multiplier x3

I've got an FX-57 with 2x 7800GTXs SLi-ed.
4x512MB Corsair TWINX4400C25 RAM Verified to run @275MHz @2.5-4-4-8(tried on auto settings, 2.5-3-3-6@2.75v, 2.5-4-4-8 and various combinations of each)
Tried removing 2x512MB sticks and it dropped my score.

My CPU score on Aquamark3 is only 11.5k @ stock? :( :confused:

Anyone got any suggestions??
Any help would be greately appreciated.

[newls1]

Maybe im not understanding here, your score w/ AQ3 is only 11,500? Overclocking is a very "touchy" thing. What one FX57 will do, doesnt mean another one will. The first thing I would do is set the ram in the BIOS. Try these settings: 2.5/4/4/10 1T with just 2 512MB sticks of ram. Set the HTT to 3x, multi to 12x and FSB to 250, and see if she is stable? Make sure your CPU Vcore is set right, and DDR Vcore is set right. Make sure your 2 ram modules are installed using dual channel. Which for my MSI K8N NEO4 plat SLI, are the 2 slots closest to the CPU.