I just added some new parts to my computer. One being an after market CPU fan. I am a AMD 955 BE 3.2. I have OC it to 4.0 and the temp is idle around 32 degrees. How much perfromance should I expect to gain? Also, the temp is fine, correct? I have not touched the voltage so I image if I upped it a little I could get more than 4.0 just not sure if it is worth it.