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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 684

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post #6831 of 9531
I just got my 3770k stable @ 4.5 @ 1.24v. I used the same profile from my old 3570k a booted in the first try. prime for few hours and ibt. Now I want to reach 4.7 stable asap. After that 4.9Ghz to 5Ghz. The only bad side is when OS get's corrupted, The fixing process take too much time.

IBT keeps crash linpack64 what is this unstable OC only app crash.
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post #6832 of 9531
Well this is my post.

First of all thanks for this guide it has been a great help.

Anyway I think I've got my 3570k stable @ 4.8Ghz voltage is reported as 1.224v to 1.232 (Spiked at 1.248v).

However following on from this thread http://www.overclock.net/t/1360404/asrock-z77-series-vcore-reading I've estabished my vCore (using a DMM) is actaully upto 0.060v higher under load. so my actual is 1.284 to 1.292 with spike upto 1.308v. Until I read that thread I thought my OC was too good to be true at such a low voltage (But the temps were way too high for the voltage.)

If any Asrock z77 MoBo owner isn't aware of that thread and it's findings I recommend it, your vCore may actually be up to 0.1v higher than you think.

Anyway I hoping can confirm what I believe, that my overclock is (for now it seems) relatively stable, based my results and tests.

Basically I logged my Core Temps, Vcore (added 0.060v to the read outs) and my Memory Load in the following tests:
  • 2 mins Idle
  • 10 cycles in IBT, all threads, Stress level at Maximum
  • P95 Custom test, Min FFT 8k, Max FFT 1792k, mem to use 14300MB, Each FFT test 5 mins, Ran for 9.5 hrs (would have liked to run to 12hrs but had to turn off comp as I went away for two days may run it again for 12+ hrs at the weekend)

I've plotted the results on graphs and included a screenshot at the end of the test.

So at idle nothing unusual, Core #3 has always idled at 38c-41c however under load it isn't the hottest core and is in line with the others, so I'm not concerned by it.



During the IBT test I achieved a consistent 130 GFlops, max core was 92c which is high, but the test completed successfully. As IBT always returns high temp I'm willing to test further as it peaked at 92c, the vast majority of the time it was below 90c. Vcore around 1.3v



So I left P95 running overnight. I recorded a Max temp 85-86c and Vcore is around 1.3v.



Screenshot under load:

Screenshot just after p95 workers stopped:

As I really only use the PC for Gaming I think it's relatively stable until a game or something crashes that tells otherwise. The temps under P95 and IBT are higher that I might like but for now I will keep an eye on them under normal usage conditions (Would want that under 70c at most prefer under 60c).

I also did not have any WHEA errors at anytime. Ambient Temps were higher than normal as the UK is currently having some hot weather.

If anyone has any other thoughts on this or suggestions that would be great.

My only concern is the temps under load, pulling it back to 4.7Ghz reduces the load temps by around 7c so do people think I should pull it back?

Are my results in line with what can be expected?

EDIT: Think I'm going to see if I can Drop the Additional Turbo Volts a Notch or two (Hopefully reducing Temps to sub 85c in IBT) and last 12 hrs.

Edit2: Ambiant temps are 33c in my living room tonight which resulting in my 4.8ghz get up to 95c... Dropping volts, LLC, and pll is dropping 3c but is not stable. So my stable 4.8ghz is OK but the temps are too high for me.

I've dropped back to 4.7ghz and my Max temp at the moment is 83c (despite it being very hot for the UK) and looking stable. Just goes to show for that extra 0.1ghz it results in +12c with +0.066 extra Turbo volts required, which really isn't worth it.

I will post my logs tomorrow after a P95 overnight test.
Edited by impingu1984 - 8/1/13 at 1:08pm
    
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post #6833 of 9531
Quote:
Originally Posted by Trichael Man View Post

Prime95 was running for at least an hour then it crashed (the program, not my computer), does that mean my OC is unstable? My friends have said that Prime95 crashes randomly too, but I'm not so sure. My Prime95 is set to Blend.

I did not alter the stock settings besides the CPU Multiplier, so I guess the voltages were set to auto.

Is there any way I can improve on this?

PS Changed CPU Multiplier to 4.3, testing out Prime95

Lol your friend is wrong. I've never had p95 crash unless my oc was unstable. If your PC crashes or p95 has a critical error, your PC is unstable.

Never EVER set voltage to auto! Always do a manual over voltage

Sent from my Nexus 7 using Tapatalk 4 Beta
post #6834 of 9531
Quote:
Originally Posted by Trichael Man View Post

Prime95 was running for at least an hour then it crashed (the program, not my computer), does that mean my OC is unstable? My friends have said that Prime95 crashes randomly too, but I'm not so sure. My Prime95 is set to Blend.

I did not alter the stock settings besides the CPU Multiplier, so I guess the voltages were set to auto.

Is there any way I can improve on this?

PS Changed CPU Multiplier to 4.3, testing out Prime95
Quote:
Originally Posted by Cakewalk_S View Post

Lol your friend is wrong. I've never had p95 crash unless my oc was unstable. If your PC crashes or p95 has a critical error, your PC is unstable.

Never EVER set voltage to auto! Always do a manual over voltage

Sent from my Nexus 7 using Tapatalk 4 Beta

Just to reinforce what Cakewalk_S says that if P95 crashes or errors you are not stable. The longer you can run P95 without errors or crashes the Higher the chance you are stable, but no guarantees.

Also I would use a custom test in P95 with 90%+ memory loaded and before that an IBT at stress Level Maximum for at least 10 cycles to check your max temps. Test with more than P95 (like IBT, and normal usage like games you play regularly, video rendering if you do that a lot etc.) including keeping an eye on things when using it normally. In a few weeks if you've had no crashes etc then you could say it's probably stable.

See my tests 2 posts above, I'm still not sure after 9.5hrs P95 and 10 cycles in IBT with 95%+ ram loaded despite having no errors, but recorded temps up to 92c at peak.

Stress test will only give you an indication that might be stable. If the stress test isn't stable you are not stable.
    
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post #6835 of 9531
Quote:
Originally Posted by Trichael Man View Post

Prime95 was running for at least an hour then it crashed (the program, not my computer), does that mean my OC is unstable? My friends have said that Prime95 crashes randomly too, but I'm not so sure. My Prime95 is set to Blend.

I did not alter the stock settings besides the CPU Multiplier, so I guess the voltages were set to auto.

Is there any way I can improve on this?

PS Changed CPU Multiplier to 4.3, testing out Prime95

Follow the guide and setup your voltages with offset and additional turbo voltage. You should always set you voltage when overclocking.

Your overclock is not stable if P95 is crashing. You want to run P95 for 6 + hours
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post #6836 of 9531
Quote:
Originally Posted by kennyparker1337 View Post

Intel Hyper Threading Technology: Enabled
~Setting for Hyperthreading for CPUs like i7-2600k / i7-3770k.
~If you have this setting Disabled, you pretty much wasted $100 as this is the one extra thing you get from i5-2500k / i5-3570k.
~Does disabling hyper-threading increase performance? No.

Just wanted to correct a few statements made here regarding hyperthreading:

- going for a 3770k over a 3570k is not a waste of money, even if you disable hyper threading. Cpu's are binned. That doesn't mean every 3770k will OC better than every 3570k. But the 3770k designated chips have been tested to be better chips in general. The same was true with the 2500k vs the 2600k. However, the binning margin was increased for the ivy bridge chips! Furthermore, having the option of hyperthreading is a great feature to have!

- disabling hyperthreading CAN increase performance!! In a few ways:
1) disabling hyperthreading reduces heat
2) disabling hyperthreading reduces required voltage
3) disabling hyperthreading therefore can lead to higher stable OC's!
4) many games and apps will perform faster with hyperthreading OFF. The reason is that many games are ports or otherwise designed around no more than 2 cores. Some newer games will take advantage of 4 cores. But there are very very few games tha require that! This will change with the ps4/xbox1 coming out, fortunately. But it's also one of the reasons why an equal-speed AMD 8-core chip will lose out to a 4-core intel chip in many tests. While the intel chip is more efficient and does more per core/per ghz, the difference isn't enough to allow 4 of its cores to beat out 8 of amd's cores. However....if an application is not optimized for that many cores....then you won't see as much of an advantage.

Also, hyperthreading isn't additional cores. Think of it as "task delegators." They act as a middleman between applications and your cores. For many applications or games that are designed to use a limited number of cores, you are just introducing an extra step in the chain, while using more power, creating more heat, and limiting each cores maximum speed. A good example of this is something like intelburntest. At 5ghz with hyperthreading, for example, I get about 112gflops. At 5.1ghz which i can hit without hyperthreading, I get around 136gflops.

Hyperthreading is beneficial for some tasks! If you do any video encoding or compression, depending on your codec, you can see an increase of 30-50%. So even though for most games and apps you're happy keeping hyperthreading off, a quick 1 minute reboot to enable hyperthreading can cut off a ton of time from your encoding process!

Also, by having the option of hyperthreading, as I mentioned earlier, you are future proofing your CPU. As the next gen consoles come out and developers release and port games designed to run on 8-core console cpu's, you will see more benefit to having hyperthreading in games!

I had to share that info as I feel it's very important and I wouldn't want anyone to be misinformed when making a decision on their next purchase. Good guide, btw. I will be posting and asking for some assistance in a day or two! I bought a CPU that the owner claims does 5ghz with HT at 1.4v. However, the CPU on a better loop, and while using better thermal compound (indigo extreme), is running whea errors at 5ghz even at 1.52v!

Will post details and hope to get some assistance later! Was really disappointed that the chip didn't perform as I had been led to believe. 5ghz at 1.4v on my loop should have been able to do 5.1-5.2ghz with more voltage. frown.gif
post #6837 of 9531
Alright, thanks guys! I'll update my results when I finish Prime95 with new settings smile.gif
post #6838 of 9531
Quote:
Originally Posted by impingu1984 View Post

Well this is my post.

First of all thanks for this guide it has been a great help.

Blah blah blah (snip)....

My only concern is the temps under load, pulling it back to 4.7Ghz reduces the load temps by around 7c so do people think I should pull it back?

Are my results in line with what can be expected?

EDIT: Think I'm going to see if I can Drop the Additional Turbo Volts a Notch or two (Hopefully reducing Temps to sub 85c in IBT) and last 12 hrs.

Edit2: Ambiant temps are 33c in my living room tonight which resulting in my 4.8ghz get up to 95c... Dropping volts, LLC, and pll is dropping 3c but is not stable. So my stable 4.8ghz is OK but the temps are too high for me.

I've dropped back to 4.7ghz and my Max temp at the moment is 83c (despite it being very hot for the UK) and looking stable. Just goes to show for that extra 0.1ghz it results in +12c with +0.066 extra Turbo volts required, which really isn't worth it.

I will post my logs tomorrow after a P95 overnight test.

Bah... still not got 4.7ghz totally stable. Got a Whea error about an 2 he's in to P95. Be upping the voltage and playing around with pll and maybe level 3 LLC as that seems to reduce temps at load but maybe less stable.

Maybe a happy medium can be achieved. Still a load temp headroom to get 4.7ghz stable Max temp in p95 was 77c and IBT was 86c... and ambient temp was is around 4c higher tonight, it is very warm.
    
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post #6839 of 9531
strange thing 3770k won't like IBT at all with HT on, since I disable it the IBT just passed and here is the result

4.7Ghz
LLC - 2
Offset - +30
voltage spikes between 1.296v to 1.312
IBT Temp - 76 - 85 - 82 - 80
IBT 1024MB test
113 Gflops min
120 Gflops max
temps are high only in IBT

Prime temp are way better
volt spikes 1.288v to 1.296v
65 - 69 - 67 - 67
using this settings and memory using 4096MB


IBT push's it more.

I don't deal with HT since the first i7 first gen I had always used 4 cores only. K was always my option.
any input to get this HT on and passed on IBT?
Edited by skyn3t - 8/1/13 at 5:41pm
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post #6840 of 9531
Read my th
Quote:
Originally Posted by skyn3t View Post

strange thing 3770k won't like IBT at all with HT on, since I disable it the IBT just passed and here is the result

4.7Ghz
LLC - 2
Offset - +30
voltage spikes between 1.296v to 1.312
IBT Temp - 76 - 85 - 82 - 80
IBT 1024MB test
113 Gflops min
120 Gflops max
temps are high only in IBT

Prime temp are way better
volt spikes 1.288v to 1.296v
65 - 69 - 67 - 67
using this settings and memory using 4096MB


IBT push's it more.

I don't deal with HT since the first i7 first gen I had always used 4 cores only. K was always my option.
any input to get this HT on and passed on IBT?

Check out my post a couple up. Explains it.
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