Which 24/7 OC would you use?

[Qwinn]

Okay, so I updated to modded BIOS 1801 (thanks Gonzo) which of course led me to retry my overclocks, and for the first time I think I've found an OCCT stable 4.5Ghz overclock. My question is, is there anything safety/degradation wise in the difference between these two overclock settings that would make you prefer the 4.4 Ghz over the 4.5 Ghz settings?

In the list below, I'm listing what I have set in the BIOS, followed in parenthesis what I actually get as the maximum for that value over the course of a 3 hour OCCT run.

Both settings are with my 2666 kit at XMP. I don't plan on ever OC'ing memory.

Both settings have cache set to min 30/max 30 adaptive auto. Actual cache voltage never gets as high as 1v, generally stays around 0.95v.

The super-stable 4.4 Ghz OC Settings:

Ratio/Clock: 44x100
LLC: 7
Total Adaptive Voltage: 1.25v (1.28v)
Input Voltage: 1.9v (1.88v)
Max CPU Package Temperature Spike in OCCT: 74c
Max single CPU core temp in OCCT: 70c

The 4.5 Ghz OC Settings currently under testing, but final stable settings should be very close to this:

Ratio/Clock: 45x100
LLC: Auto
Total Adaptive Voltage: 1.295v (1.33v)
Input Voltage: 1.92v (1.95v)
Max CPU Package Temperature Spike in OCCT: 80c
Max single CPU core temp in OCCT: 75c


The 4.5Ghz OCCT run is still going, but I've passed 2 hours at this point. I'll update if anything like max temp changes during the run. Note that this run is going with Steam minimized, Bitdefender active, and me working on the browser during the run.

Note when evaluating for safety/degradation that this IS fully adaptive, so it'll only be at the higher voltages under load. With my 4.4Ghz OC In Witcher 3 on 3D Vision in 1440p, CPU never seems to go over 62c so I don't expect it to ever reach 70c with the 4.5Ghz settings.

So. Thoughts? Opinions? Are those 4.5Ghz voltages/temps reasonable/safe for a 5930k for 24/7? Any suggestions on how I could increase stability? For the 4.5Ghz run I have CPU Power Phase Control and both DRAM Power Phase Control settings set to Optimized, it seems to have improved stability. The CPU/VRM Spectrum settings are auto/disabled, I thought enabling those were helpful for a bit but, no, not in the long run.

[Qwinn]

OCCT is the only thing I've run that can get my temps that high. Think highest I've seen outside of it is in the high 60s.

[Pleot]

prime is an assassin for haswell-e processors, I run it for abut 5 min and then halt. Anyway if there is serious instability it will fail right away. Tried running it longer but when my temps reached 94 I stopped 😄 On the same conditions Realbench wont go beyond 75

[Qwinn]

Pleot, if you're referring to the AVX issue on adaptive overclocks in Prime, per Raja that only affected Haswell, it was fixed for Haswell-E. I've run AVX on adaptive and can confirm my voltages didn't do anything strange.

Current OCCT run with 3.8Ghz cache is at 9 hours 33 minutes! Woohoo! Max package temp 84c and max core temps 73 74 80 75 75 70, a little toasty but if that's as hot as OCCT can get it, I have nothing to worry about for temps in daily use.

[Pleot]

There are a lot of bad comments running around, the one you refer is another one, some say it draws to much power from the psu and I can confirm in the end that it does heat my cpu like nothing else 🙂 Yes related to the avx instruction...