I've tried to overclock my Intel HD Graphics 4600 in my desktop PC.
I've read elsewhere; people managed to get 1600-1700MHz (OC) instead of 1250-1300MHz (default).
The problem here is I am not unable to get reliable consistent results.
At some point I was able to get a decent record, but I'm unsure whether it was "Adaptive" or "Static" voltage as the Intel Extreme Tuning Toolkit sometimes changes this setting.
I used FurMark for these records
SCORE CLOCK VOLT 393 - DEFAULT 403 - 1350MHz 411 - 1400MHz 419 - 1400MHz (+0.085V) 408 - 1450MHz 407 - 1450MHz (+0.010V) 410 - 1450MHz (+0.005V) 415 - 1450MHz (+0.010V) 412 - 1450MHz (+0.012V) 412 - 1450MHz (+0.015V) 415 - 1500MHz (+0.010V) 411 - 1550MHz (+0.020V) 416 - 1550MHz (+0.040V) 414 - 1550MHz (+0.030V) 418 - 1600MHz (+0.080V) 418 - 1600MHz (+0.080V) 416 - 1600MHz (+0.085V) 419 - 1600MHz (+0.082V) 412 - 1600MHz (+0.084V) 422 - 1600MHz (+0.083V) 426 - 1600MHz (+0.100V) 427 - 1600MHz (+0.085V) 428 - 1600MHz (+0.095V) 435 - 1600MHz (+0.095V) 415 - 1650MHz (+0.165V) 426 - 1650Mhz (+0.175V) 426 - 1650MHz (+0.180V)
What I am thinking I am battling here is either some adaptive voltage or auto scaling.
It's quite random whether I can reproduce the results above or not.
Quite recently I even have problems reaching in the 400+ score (most scores drops below, even while being overclocked), which was not at all a problem earlier.
Without overclock as you can see the scores are from 350-400.