If you have set the "NB multiplier" to /9 in bios, your NB is running at 494,5MHz...
Because it is not a multiplier, but a divider:

On A8-3850 APU: BCLK (123,6) * MainPLLCOF (36) = 4449,6MHz.
4449,6MHz /9 = 494,5MHz.

Ideally it should be at 1:1 with DRAM speed.