Need some help achieving a stable 4.7ghz OC on 4790k

[Archer27]

Hey guys, today I have tryed to go from my stable 4.6ghz overclock to 4.7ghz.

The settings for my stable 4.6ghz OC are pretty simple(1.25 vcore and 1.808-1.836 VCCIN)

This with XMP enabled.

Now the first thing I tryed to do to achieve 4.7 was increase the multiplier alone and ran IBT on high and passed.

Next I ran Prime 95 Custom FFTs in place 1344 length...failed with a BSOD 101 error(VCCIN)
Ok so I increase the VCCIN to 1.9(it's 1.936 under load in Prime) and run the same test again. Both pass and stable after 1 hour.

I proceed to run the full small fft test and 2 hours in I get another BSOD(124)
Ok...so now my Vcore is inadequate, so I bump it from 1.250 to 1.255

Am I on the right path to stability @ 4.7ghz guys?

 

[bicycle_repair_man]

In a word, yes.

There will come a point when a big jump in voltage is required for a small gain in clock speed. At this point, you've hit the maximum overclock that your cooler can handle.

 

[Archer27]

In a word, yes.

There will come a point when a big jump in voltage is required for a small gain in clock speed. At this point, you've hit the maximum overclock that your cooler can handle.

My temps are reasonable though...my max is only 74c with an average of 69c. I am certainly not hitting a thermal wall.
I'm on a watercooler with a dual fan 240mm radiator, not air.

In any case it failed on 1.255 at the 5 hour mark this time.
I increased it to 1.27v and running again.
The BSOD's(101,124) correspond to a voltage, not thermal issue

My current settings are:
VCCIN: 1.900
Vcore: 1.27
Speedstep: Enabled
C States: Auto
Offset: Auto
Uncore: Auto
Multiplier: x47

Hopefully it is stable by the increase to Vcore this go around, but if it's not, surely theres something else I can tweak?

 

[Archer27]

After two days of tweaking and testing I got 4.7ghz Prime 95 and IBT stable.

It took 1.275 Vcore

Solved!