I briefly tried my P8P67 using the easy Turbo mode that BIOS provides (no tinkering with anything) and I got it to 4.2 Ghz. I used Prime95 to test it (100% load) for about half an hour and my average temperature was 60 degrees. I attribute it to not applying thermal paste directly. I think with some advanced tinkering and using better thermal paste I get lower the temps and get it to 4.5. I have HAF 912 with 2 Enermax 120mm fans intake and the stock fans as exhaust (one top, one at back).
The Digi-VRM is basically the voltage regulators. According to many, helps with better overclocking. If you only plan to take it to 4.5 then LE will be perfectly fine. Read up on some reviews to be sure.
The Digi-VRM is basically the voltage regulators. According to many, helps with better overclocking. If you only plan to take it to 4.5 then LE will be perfectly fine. Read up on some reviews to be sure.