2600k stops stepping down the speed when I change RAM freq

[happyshoppa2]

Gigabyte P67-UD4 board (bios F5), 2600k...

In the BIOS if I change "System Memory Multiplier" from Auto to 16.00 (My sticks are 1600MHz and on Auto they only show as 1333MHz) then in windows CPU-Z shows my CPU core speed staying static at its max multipler.

I thought we had to disable all the turbo and eist and c1/c3/c6 etc to get it to be static? I can leave all of that set to Auto. Just load optimal defaults, set the memory multiplier, and bang it stays put at 3.5ghz.

Anyone know why it's doing this? It's a bit annoying actually because I quite like the idea of it saving energy when idle.

 

[JezEngland]

erm i don't, but, i may have the idea. if your setting the multiplier higher than default i think it'll stay there.

there is speedstep in my i5 750 BIOS. That alternates the multiplier with load etc and it can be switched off

 

[happyshoppa2]

You mean the memory multiplier? Yes default is 13 so I'm setting it higher to 16.

If you mean CPU multiplier, this is happening even when I don't touch it.

 

[JezEngland]

ok. i don't know why