Each chip is different and will requiring varying amounts. I am currently trying to undervolt my 4770k. So far it looks like -0.075 (or 1.175 max voltage) off of a stock voltage is as low as I can go while maintaining my turbo boost frequency of 3900 Mhz.
If my comp doesn't load bios after undervolting, do I need to clear CMOS? On my previous motherboard, I just had to hard reset once and it worked like it cleared the cmos
Then add some arctic silver paste and your good to go ..................http://www.amazon.com/Arctic-Silver-Thermal-Compound-Grams/dp/B000OGX5AM/ref=sr_1_1?ie=UTF8&qid=1397095020&sr=8-1&keywords=arctic+silver