Z87-G45. VCore setting ignored. Set to 1.147V but maxes out at 1.3V!!

Question

Hi guys, first post here and I couldn't find any similar threads. I'm a complete noob with overclocking, but I had a 4.1GHz overclock on my i5-4670K with 1.147V (1.195V w/ -0.049 offset, adaptive mode) stable for over a year. All other settings were at default.
I reinstalled windows 3 weeks ago, updated the BIOS from 1.8 to 1.9 and the ME drivers. I didn't touch the overclock settings afterwards due to studies, but when I did try a few days ago, the vcore setting I enter in the BIOS seems to be ignored. Using the same settings as before the reinstall (1.195vcore, -0.049 offset, adaptive mode), it is reported by CPU-Z to be 1.28-1.3V during a Prime95 stresstest.
Unlikely factors:
-error in CPU-Z voltage reading = not likely as the temps are about 20 degrees celsius higher than they previously were (70+ previous, 95-99 current)
-prime95                                 = i used this same program to stresstest the CPU before the reinstall without similar issues
What I've tried so far:
- Changing CPU multiplier to 41x vcore to 1.147 without offset = 1.33V reported by CPU-Z (Picture shows these settings)
- Tried rolling back the BIOS version to 1.8 using MFlash          = no change
The attached picture shows the settings, but the CPU meter temps are still 80+ as I only ran the test for 5 seconds for fear of overheating.
I hope there's a solution to this. I don't have much understanding of what controls vcore (bios, OS, ME, etc) so I don't know what else I can do to diagnose and fix this. If anyone could offer any solutions or help, I would appreciate it greatly.
Thanks for your time!
EDIT: I only used Command centre to show the voltage setting in the screenshot. BIOS was used to change settings. I might add that command centre has always crashed within half an hour of opening it, and thus I've never relied on it.

Answer 1

Hi again, just an update on my situation. I've effectively corrected my problem, but my OC settings are still not functioning exactly like before.
I reinstalled windows (not a system image restore) without installing any of the mobo drivers that liveupdate recommends. I can achieve a stable 4.1GHz OC with 1.168V (reported by CPU-Z). The only error is that my vcore is set to 1.195 (offset -0.049), which used to give a VID of 1.147V, not 1.168V.
Still, I'm quite happy that at least I can run a stable 4.1GHz overclock at below 1.2V, which didn't work when I started this thread.
Now the only question left, since I purposely didnt install most mobo drivers, is whether I need to install the Chipset drivers or "management engine" drivers listed on my motherboard's support page? (http://www.msi.com/support/mb/Z87-G45-GAMING.html#down-driver&Win7 64)