4930k overclocking

zx128k · 21 May 2014 at 12:30

I have tried everything to try and get the volts required for vcore down as low as possible. The get handbrake stable I need 1.33volts and to get prime 95 stable 1.4volts. Note game stable is a lot less than 1.3volts. If anyone has any ideas please let me know, everyone else seems to get stable with a lot less voltage.

zx128k · 23 May 2014 at 22:58

Found a way of reducing vcore a lot, testing in prime 95 at 1.32vcore in BIOS. Using a PPL of 1.4volts.

zx128k · 23 May 2014 at 23:26

Understood will try reducing VTT and VCCSA.

zx128k · 24 May 2014 at 00:06

Will give turbo vcore a try. Running real bench at 1.285vcore and PLL ar 1.25volts.

zx128k · 24 May 2014 at 06:33

1.35volt vcore and 1.25volt PLL is stable in prime 95 on a 125 strap for a blk of 128.625 x 36 or 4500MHz. Stable realbench is at about 1.33volts. Volts in CPU-z is 1.36volts vcore. This is a reduction from 1.425 to 1.36volts via tuning. What would you advise other than prime 95 for testing?

zx128k · 24 May 2014 at 08:38

So far these setting appear to be stable.

[img=http://s7.postimg.org/e8oaudn7r/Untitled4.jpg]

zx128k · 24 May 2014 at 21:23

Testing 1.335 Volts vcore at 1.25volts PPL, these are the only changes from above. Vcore in cpu-z is 1.344 volts.
Fail
Testing 1.34 Volts vcore at 1.25volts PPL, these are the only changes from above. Vcore in cpu-z is 1.344 volts.
Fail
Testing 1.35 Volts vcore at 1.25volts PPL, changes made for 24/7 operation. Vcore in cpu-z is 1.36 volts.
Fails small fft but passes blend.
Testing 1.37 Volts vcore at 1.25volts PPL. Vcore in cpu-z is 1.374 - 1.392 volts.
Pass all prime 95 tests (2-4hours each test), handbrake and memtest86+ Tests temps are 72C approx. in Prime 95 max.
Doing idle tests and game tests but have no issues so far.

Strange issues I had with some programs have stopped happening. For example I can now run netflix in firefox, random resets are gone after dropping blk lower from 129-130 and also freezes in netflix. Random issues in some of my games have gone which I had in both the 4770k and 2500k. I still have a strange boot issue, it will reboot very quick when I power on for the first time but will boot and run completely okay after this reboot. This does not always happen.

zx128k · 26 May 2014 at 09:21

Would using offset instead of manual voltage on vcore get rid of the bootup reset first time from cold boot?

zx128k · 26 May 2014 at 11:44

Thank you, testing with offset will have to wait until the weekend when I have the time to test.

zx128k · 11 Jun 2014 at 22:39

I just found out that my overclock was unstable, it started crashing in prime95 right away. So I switched from one stable over clock profile to another and now I an stable again with the same vcore (a bit lower).

zx128k · 13 Jun 2014 at 01:48

zx128k · 19 Jun 2014 at 02:11

Issue found to be ram related, RAM timings changed and everything is as it should be. Seems to take four weeks plus for the overclock to settle. Upgraded the BIOS to 603, so far no issues at startup and USB hard disks now work.

zx128k · 19 Jun 2014 at 02:21

4.6Ghz appears stable above 1.4volts, go for it or leave at 4.5Ghz?

zx128k · 21 Jun 2014 at 21:27

This morning my overclock fell apart and I could not get 4.5Ghz stable no matter what. Was able to get 4.4Ghz stable, so thought this is it I have degraded the CPU. So I tried everything and found inrush current option very interesting.

So I tried the 4.5Ghz auto overclock to see if it would be stable and bang stable again at 4.5Ghz under 1.4volts. The only real thing that had changed was that the RAM timing were now defaults and not the XMP settings. This is strange as I tested the RAM at the settings they were before and had no issues. I am not really using much above stock for the IMC.

zx128k · 21 Jun 2014 at 21:44

1.65volts to 1.67volts has fixed the issue with ram for now.

zx128k · 23 Jun 2014 at 08:47

I have returned ram to normal and have increased VCCSA to 1.175 and its stable at the moment. Will find out for your when I shutdown and boot up with everything cold. Vcore is now 1.335volts for 4.5Ghz but have yet to ran prime95 for a few hours. Everything seems stable. I have left VTT CPU volts auto which helped a lot.

zx128k · 25 Aug 2014 at 18:54

Motherboard died, new motherboard and CPU. Currently at 4.4GHz at 1.24volts with new kit. Will overclock when I get time, I know this one does 4.6Ghz at 1.4volts but have not got time as working hard atm. Will have to kill stuff at christmas time.

zx128k · 21 Sep 2014 at 20:54

I think the motherboard just stopped liking over-clocking. CPU was okay in the new board and still works. New cpu does 4.5 GHz under 1.35 volts which is nice. Could be 1.3 volts and below but have not primed anything. 4.4 Ghz at 1.24 volts but to busy to over-clock at the moment. Note that at full load the board puts 1.26 volts into the CPU and this is enough for 4.4 Ghz. I was handbrake a lot while over-clocking to death, so guess the motherboard was the first to die.