Oh, So i can't overclock the 2300...? I can only overclock the 2500 and the 2500k?
You can get very margianal OC's on the NON "K" editions, but it is very very minimal.
Only the 2500k and 2600k have the unlocked multiplier needed to overclock.
Only the Z68 and P67 chipsets supports this overclocking.
All of the other models 2100 2400 2500 2600 (WITHOUT THE K) cannot be overclocked other than a slight improvement from BLCK tweaking which in general isn't recommended due to causing system instability.