What RAM does my motherboard support?

Hello experts,

I have a Gigabyte P55A-UD3P rev 1.
What RAM does this motherboard support?

http://www.gigabyte.com/Motherboard/GA-P55A-UD3P-rev-10...
The website says that it supports DDR3 2200/1600/1333/1066/800 MHz, but I was told by several shops that 2200 and 1600 MHz is unstable with this motherboard.

Can someone please advise?

Thank you in advanced.