i5 6600k wont clock above 4.2Ghz (stable)

atomsmasher13

Commendable
Dec 28, 2016
4
0
1,510
So I've just got a new PC as follows

Processor: Intel i5 6600k
Mobo: Asus Z170 pro gaming
Cooler: Noctura U14S
RAM: Corsair 16GB DDR 4 3000mhz
Graphics: GTX 1070 (Gigabyte gaming pro)
Storage: 250GB hyper X fury SSD and 2Gb seagate HDD
Power: Coolermaster 650w bronze

Got windows 10 installed and all the hard drives set up and allocated, but having now got things in a position to get overclocking I am running up against some very disappointing results.

The standard voltage for the i5 seemed high when I first went into the BIOS and was 1.295 without making any adjustments - I set this to 1.32 and the went for a 4.5Ghz clock to start.

I was greeted with blue screens after a few minutes of trying this, and so tried 4.4 and 4.3 - these had better stability, but both saw failures in prime95 after about 5 minutes, which was very disappointing.

With a 4.2 Ghz clock I have managed to run the prime95 for about 2 hours with no issues; the max temp has been about 69c which seems fine. The voltage is still at 1.32

Am I doing something wrong here or did i just get unlucky (silicon lottery etc.) ? It doesn't seem to be the cooler holding the system back at this point, so I'm wondering what I'm doing wrong? Should I try a higher voltage? Should I be changing anything else? I've not heard of people coming across many problems getting a clock of 4.5ghz, so any suggestions are welcome!
 
Solution
Check your load line calibration. Just like my CPU, maybe yours also take more voltage than average, perhaps at stock clocks yours can undervolt pretty far, or maybe your voltage wall is at 4.2 GHz and higher clocks only need minimal voltage increases.

It is possible that you might have lost the silicon lottery, but use HWMonitor and check voltage fluctuations first.

atomsmasher13

Commendable
Dec 28, 2016
4
0
1,510


Could It be the fact I'm using XMP? I've heard some people suggest this can be an issue.
 

kgt1182

Reputable
Jun 8, 2016
420
0
5,160
Check your load line calibration. Just like my CPU, maybe yours also take more voltage than average, perhaps at stock clocks yours can undervolt pretty far, or maybe your voltage wall is at 4.2 GHz and higher clocks only need minimal voltage increases.

It is possible that you might have lost the silicon lottery, but use HWMonitor and check voltage fluctuations first.
 
Solution