Need advice on OC'ing Asus Sabertooth Z77 with i7 3770K

I've just hit 9hrs stable.

EDIT 10hrs!
common please 2 more hours :D!
I can see it has passed where it failed last time already.

EDI 11hrs not failed - it HAS DONE a full cycle now (checked the logs) - starts at 1024K ends at 4096K
 
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Right it finally failed:
[Oct 3 20:58] Test 10, 6500 Lucas-Lehmer iterations of M12451841 using FFT length 896K.
[Oct 3 20:59] Self-test 896K passed!
[Oct 3 20:59] Test 1, 6500 Lucas-Lehmer iterations of M12451839 using FFT length 768K.
[Oct 3 21:00] FATAL ERROR: Resulting sum was 11192333986365.84, expected: 1029130637661035
[Oct 3 21:00] Hardware failure detected, consult stress.txt file.
[Oct 3 21:00] Torture Test completed 494 tests in 10 hours, 42 minutes - 1 errors, 0 warnings.
[Oct 3 21:00] Worker stopped.


Honestly don't know if I want to try and make it run fully stable - I'll leave the PC cool down for several days, as it has been going on non-stop, trying to get this OC working.

Considering it has gone full circle. It leads me to believe it is pretty much stable.
Any recommendations based on this test result?
 
Azcam11 said:
did prime crash at 1.295v? 1.295 seems to high for me. I was reluctant to go over 1.275. With llc set to high my voltage under load was 1.264. I steered clear of X.M.P profile aswel.
Click to expand...

I steered clear from XMP too - I'm on manual, as it seems more stable/lower temps

1.275, 1.28, 1.285 have already proven to crash
The HIGHER I go in voltage, the more stable it gets (7hr, 9hrs, 10:30hrs - which was at 1.3v) - on 4.4ghz

So I don't know what it is.
I'm now have gone LOWER than my previous 1.3 10hr result, because maybe 1.295 might be the sweet spot.

But I don't know - apart from voltages, how's everything else look like?
 
Azcam11 said:
temps are a tad high in my personal opinion. Other than my 1.275v, i have left everything else to auto. Any reason you have changed PLL? to be honest, you could just have a bad chip. Hows 4.4ghz on 1.295?
Click to expand...

Yeah temps are a little high for me too.
I was told to change the PLL that's why I changed it from auto.
As for the bad chip thing...the only thing that was off-putting was the fact that I got a broken motor fan with my i7.

And never tried 4,4 on 1.295
 
Azcam11 said:
bit of a lottery with then chips mate according to the interweb. I regard my temps at 4.6 to be pretty shocking considering i spent around £600-£800 on watercooling.

Id whip it down to 4.4ghz, try 1.295 and if stable, reduce voltage by .005. Try to put LLC on high instead of ultra. Ive read that its not always best for it. From what i can gather, aslong as your drop is around 0.010 of your set voltage under load then you should be good to go. (please anyone jump and correct me if im wrong)
Click to expand...

Wow - That's quite a bit! lol

An thanks for the advise - if this fails, I do that.
I don't mind clocking it down even further to be honest, I'm just going for 4.4-4.5 simply because that's what I would deep a "worthy" OC, anything lower is a little pointless in some respect.
 
4.5ghz OC so far stable for just over 6hrs.
7hrs later:

[Oct 5 01:20] Test 7, 2500 Lucas-Lehmer iterations of M26738689 using FFT length 1536K.
[Oct 5 01:21] Test 8, 2500 Lucas-Lehmer iterations of M26738687 using FFT length 1536K.
[Oct 5 01:23] Test 9, 2500 Lucas-Lehmer iterations of M26138689 using FFT length 1536K.
[Oct 5 01:24] FATAL ERROR: Resulting sum was -6.699295120618038e+072, expected: 5104644912677053
[Oct 5 01:24] Hardware failure detected, consult stress.txt file.
[Oct 5 01:24] Torture Test completed 378 tests in 7 hours, 58 minutes - 1 errors, 0 warnings.
[Oct 5 01:24] Worker stopped.
 
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Right now I'm trying:
4.5ghz with:
-XMP profile
-1.31 cpu v
-1.5 dram
Rest on auto

CCL now on HIGH (Temps are much lower now)

Other settings are the same as before.

EDIT:
That failed within 4mins.

Back to manual over XMP then
 
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Krono5 said:
these are my offset settings. You should start at 43* multiplier and 0 offset and then work your way up using the lowest offset you can to keep it prime stable. PLL overvoltage is important for 4.5Ghz and over from what i've found and I needed to turn some c-states off to get 4.6Ghz stable.

IIRC the high VCCSA was needed to get my RAM stable at ultra low timings so you can probably leave that on auto. LLC is very important and should be on atleast 75%. I just put mine on the max as that as what stopped all vdroop when using a fixed voltage and helps manage the gap between full load and idle voltage. Some of the other Dig+ settings are quite high but it all seemed to help stability for me, you should probably experiment with them.

With these settings cpu-z says 1.312v voltage at full load, 1.088v when idle. Voltage isn't really important due to the thermal limits, so over 1.4v which starts getting to a point that may damage the chips lifespan on air the temps would be insane. I just ensured it didn't go above 85c during the summer when it was about 30c ambient in the room under Prime small fft's. 80c is imho the safe thermal limit for these chips.















Click to expand...

Right I've gone for these settings, but with 4.2ghz.
Offset at o.o5
Dram at 1.5
Llc on high
And cpu capacity to 130%
 
EDIT:
Failed after 17hrs...but 17hrs is a long time.
I'll go to 4.5, and change the offset.


I have a stable - so far - 4.2
Offset at o.o5
Dram at 1.5
Llc on high
And cpu capacity to 130%

Temps are also extremely good at around 65c:



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