I just built a new pc with the 5000+ BE and tried to OC it but got some weird result...
 
When i check the system properties in windows it shows it running at 3.1 ghz however when i check rmclock and cpu-z they both show the cpu running at default 2.6 with a multiplier of 13  
 
I was wondering which one i should beleive at this point or if i screwed up somewhere possibly ...
 
The motherboard is the M2N32-SLI Deluxe

Make sure Cool and Quiet is off in the bios

^^^ nailed.

Noob question: why does that need to be disabled?

Doesn't. If you want to save electricity, turn it on. For overclockers, it should be off.

then why did that fix the problem?

Think of it as an automatic underclocking trick.

@ Zylatis:  Cool and Quiet is software that will automatically adjust your clocking and voltage dependant on current need.  Once installed, you have to enable/disable in your BIOS.  If you're overclocking, chances are you want to hit a certain speed regardless of actual need, so Cool and Quiet really doesn't fit the overclocker's equation.  It's kind of the Anti Overclock.  

Cool and quiet LOWERs the voltage and multiplyer. Most bios wont allow you to modify the multiplyer without disabling its auto control since they can conflict.