Originally Posted by iSeries
it seems there is a difference of opinion over oc'ing the CPUNB. Some say push it as far as you can, others say keep it close to stock 2000mhz as oc'ing it doesn't really increase performance. Which is it? Also, would oc'ing it to 2500mhz raise temps by any meaningful amount?
I think you may have confused the HT with the CPU/NB.
Overclocking your CPU/NB will certainly improve performance, especially if you have also overclocked your memory. This only works to a certain point though. For example, a 3000MHz CPU/NB would only be useful if your DDR3 was running at 2000MHz or more. Try to find the right speed for your setup.
Overclocking your HT (aka. FSB) over the stock 2000MHz will not result in much of a performance gain. In fact, some research suggests that anything over 2200MHz can actually reduce performance slightly. Try to keep this between 1800MHz and 2200MHz. The HT cannot be clocked higher than your CPU/NB.
As for temps, overclocking the CPU/NB to 2500MHz will make things hotter, but it all depends on how much voltage is used to get there and how much you increase the clock. Make sure the NB temperature stays below 75C. With a good motherboard and decent cooling, this is really not hard. My CPU/NB is running at about 2900MHz with 1.35V and I can't even get it to 50C under full load with my setup.