Nice thread tdw. I have a very similar build (i7-4770K, GA-Z87X-UD5H, GTX 660 Ti, 16 GB RAM and Mavericks 10.9.1)
I'm just dipping my toe in the water to overclock and having a problem I'm hoping you all with similar builds can help out with.
I started by setting my multiplier from 35 to 37 in the gigabyte BIOS, and setting the turbo boost as follows
1 core active from 39 to 41
2 core active from 39 to 41
3 core active from 38 to 40
4 core active from 37 to 39
I also increased vCore from 1.117 to 1.173 (+5%).
So far, so good. Now the problem. When I reboot and stress out the CPU (using handbrake), I note in HWMonitor (v6.0.1057) that the CPU is still only hitting 3.5 GHz or 3.9 GHz. Looks like the BIOS changes to the multiplier didn't take effect. However the vCore changes did.
I've rebooted and checked them 3-4 times and even tried disabling turbo mode and setting the base multiplier to 41. No effect.
What am I doing wrong? Can someone point out my stupidity for me? Many thanks.