I am currently running an i3-6100 on stock settings (3.7GHz) with a ASUS B150M-C mobo with a more-than-adequate PSU. I just finished my system build and have no wish to upgrade the CPU, though I do understand it is the bottleneck for my current build. I have OC'd GPU's in the past, but never a CPU. I'm interested in bumping it up to 4GHz. Is that probable and if so, can you point me in the right direction to start? Thanks.