need help with motherboard - memory config

[Mouse_c4]

hello everyone,
i saw a post on the forums about someone that bought the same motherboard, cpu and memory than me i was hoping that anyone could help me.

this is the post of the other guy:
http://www.tomshardware.co.uk/forum/330846-30-asrock-extreme4-corsair-16gb-2x8gb-ddr3-1866mhz

i cant get my memory working its switches back all the time to 1333 and then my pc says that it is instable

i hope someone can help me fixing it.

 

[techsamurai]

Hi,

This is a CPU limitation and is being controlled by the memory controller. Underclocking is a normal behaviour with CPU's that can't handle faster speed.

"AMD 100 and 200 series CPUs support up to DDR3 1066 MHz. With ASRock design, this motherboard can support DDR3 1333 MHz"