Had a problem with new rig late last weekend. It turned out to be the OCZ 1150Mhz memory. Overclockers suggested I downgrade to 800Mhz memory since it is more stable. They sorted me out within 36 hours of having problem. Not that I see much difference in performance, now get 268 fps in css video stress test, compared to 270 fps with 1066Mhz memory - wierd!!?
Anyhow guys, learn from my experience it would appear that 1066Mhz memory hasn't really reached the same stability as 800Mhz memory. For a start, there isn't any BIOS's that recognise 1066Mhz memory, you need to manually input speed - that of course can open a pandora's box as other bios settings may then need to be adjusted.
From doing a bit of research 1066Mhz memory is for enthusiasts who want to squeeze every last morsil of performance from their machine and enjoy the challenge of experimenting with Bios/voltage/timing to gain stability.
The manual of my new board says it supports KINGSTON HyperX 1066Mhz memory, but the KINGSTON website lists NO MOTHERBOARDS that will support their 1066Mhz Hyperx memory.
My m/b manual says board officially supports up to 800Mhz memory, but claims it 'natively' supports 1066Mhz.
Do you see what I am getting at?
I choose stablity over performance. who knows maybe future bios release will improve stability?