I have a Intel Core i7-3770 Quad-Core Processor that runs at default, 3.4GHz. I have sped it up to 4.1 GHz. It runs at a temp of no more than 65 degrees Celsius. It doesn't crash or anything and is stable after getting it running. I have 8GB of RAM; the RAM is Corsair Vengeance Red 8GB (2x4GB) DDR3 2133 MHz. It is in a well ventilated case, Rosewill Gaming ATX Full Tower Computer Case THOR V2 Black. Now here is my problem, When I run the Basic Input Outt.put System(BIOS) settings at default, it logs in pretty quick and then I can start any processes I need to but at the speed of 3.4GHz. Now when I start to overclock it anywhere near 4GHz, the OS starts up the same but after typing in my user name and password, it takes almost 3 min to get to the desktop. As mentioned earlier, it loaded up quickly before overclocking. I have adjusted the CPU's VCore according to what I have the CPU multiplier set to. After the system has loaded up, it resumes speed and starts to run quickly again. Not sure what to do at this point. I would most definitely like my PC to run at 4GHz without slowing down my log in speed and decreasing my performance. I also know for a fact that the processor is not throttling back due to the temperature not being hot enough. Any advice is well appreciated. Thank you for your time and answers.