Can I use faster DDR3 memory for my XENON E5504 than DDR3-800?

[Guest]

Can I use faster DDR3 memory for my XENON E5504 than DDR3-800? i.e will DDR3-1066 work ok?

 

[the last resort]

yes, you can, but the speed will be clocked and locked down to DDR3 800.