EPTThe Haswell overclocking thread - Page 6
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Cyro
United Kingdom20326 Posts
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Military
32 Posts
For the stability testing people are looking at, a 10x pass on high or very high on IBT should get you past the 1st gate. A 12 hour run on p95 (blend or 8Ks, blend if you have overclocked RAM, 8Ks if you know that RAM/GPU is stable and CPU is the only unknown factor) will get you past the 2nd gate. Play a game for a few hours and check it out (make sure it is on the highest settings and a fairly new game, not Doom 3 quality) will get you past the 3rd gate. Then you can try folding, which should check it out whether or not the overclock is completely stable. Of course, a run of p95 + some gaming should do the trick for normal usage so you don't have to go through all the hassle of taking that long. Here are some links to contribute: This link gives detailed information on the architecture and the adventures of a Haswell overclock: http://www.overclock.net/t/1401976/the-gigabyte-z87-haswell-overclocking-oc-guide This link talks about the benefits of Haswell and the amazing performance that you can get from your $50 ram kit: http://www.overclockers.com/3step-guide-to-overclock-intel-haswell | ||
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Cyro
United Kingdom20326 Posts
Thanks for the post With a very good air cooler or all-in-one water cooler, you’re looking at a heat limited voltage cap of about 1.25 V. At that voltage with air or AIO cooling, you’ll be seeing temperatures in the upper 80′s to lower 90′s (°C) range under normal full processor load. I don't like that second link a lot, it misses out a lot of specifics and that temperature range seems like they are testing for avx1 (but not avx2 or normal loads) | ||
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Military
32 Posts
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Cyro
United Kingdom20326 Posts
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Antoine
United States7481 Posts
On August 15 2013 20:44 Military wrote: Not really sure what you can add to the OP other than some links as to some guides on how to overclock a Haswell or cooling/temps. For the stability testing people are looking at, a 10x pass on high or very high on IBT should get you past the 1st gate. A 12 hour run on p95 (blend or 8Ks, blend if you have overclocked RAM, 8Ks if you know that RAM/GPU is stable and CPU is the only unknown factor) will get you past the 2nd gate. Play a game for a few hours and check it out (make sure it is on the highest settings and a fairly new game, not Doom 3 quality) will get you past the 3rd gate. Then you can try folding, which should check it out whether or not the overclock is completely stable. Of course, a run of p95 + some gaming should do the trick for normal usage so you don't have to go through all the hassle of taking that long. Here are some links to contribute: This link gives detailed information on the architecture and the adventures of a Haswell overclock: http://www.overclock.net/t/1401976/the-gigabyte-z87-haswell-overclocking-oc-guide This link talks about the benefits of Haswell and the amazing performance that you can get from your $50 ram kit: http://www.overclockers.com/3step-guide-to-overclock-intel-haswell Yeah man, like Cyro said I see almost no benefit in running hours of straight cpu stress tests with prime95 or anything similar. You can run a very quick one if you're just trying a new OC, but just playing a game or running a x264 will reveal issues almost right away. | ||
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Military
32 Posts
I think with the RAM, Haswell's performance relationship with RAM is similar to APUs from AMD. | ||
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Cyro
United Kingdom20326 Posts
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Aylear
Norway3988 Posts
+ Show Spoiler [Hardware] +
I've thoroughly read Overclock.net's Haswell Overclocking Thread and The Gigabyte Z87 Haswell OC Guide, meticulously following all advice, and I'm starting off with a basic 42x template, very conservative. I've also watched and followed this and this for a basic overview of the BIOS and some example settings. Right now I'm running Prime95 in Large FFT mode. It's been going for about 40 minutes so far, and this (screenshot taken like half an hour ago because I'm busy with other stuff as well) is the current output. It all looks fine to me, but if someone can take a look at my monitors to make sure there's nothing amiss I would appreciate it. Also, what other benchmarking software do you guys recommend? Edit: Following this guide I was able to determine that my CPU is quite handily in in the top 50th percentile group. It booted in 4.6GHz, 1.20V, and it is currently Prime95ing away using Large FFT @ 4.6GHz (4.2 Uncore) 1.25V, reaching 75 degree temperatures. If I were to use IntelBurnTest the temperatures would increase pretty dramatically, though. Edit 2: AIDA64 is weird. The interface in AIDA claims the temperatures are a stable ~60 with peaks (spikes) of 76. HWMonitor flails rather wildly from value to value, from 63 to 72 to 59 to 78. Edit 3: After an hour+ of prime95 and then another hour with AIDA64, my CPU seems stable as hell at 4.6GHz. I will mess with it a bit more tomorrow, but the temperatures are approaching 85° even on my Noctua NH-D14 (with the system pushed to 1.260V because of AIDA64), so I'll probably just be looking for ways to reduce the temps more than I am trying to squeeze some more MHz out of the system. Any information you guys can give me would be appreciated. | ||
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Military
32 Posts
On August 18 2013 16:40 Aylear wrote: So I'm finally in the process of overclocking my i7-4770K. + Show Spoiler [Hardware] +
I've thoroughly read Overclock.net's Haswell Overclocking Thread and The Gigabyte Z87 Haswell OC Guide, meticulously following all advice, and I'm starting off with a basic 42x template, very conservative. I've also watched and followed this and this for a basic overview of the BIOS and some example settings. Right now I'm running Prime95 in Large FFT mode. It's been going for about 40 minutes so far, and this (screenshot taken like half an hour ago because I'm busy with other stuff as well) is the current output. It all looks fine to me, but if someone can take a look at my monitors to make sure there's nothing amiss I would appreciate it. Also, what other benchmarking software do you guys recommend? Edit: Following this guide I was able to determine that my CPU is quite handily in in the top 50th percentile group. It booted in 4.6GHz, 1.20V, and it is currently Prime95ing away using Large FFT @ 4.6GHz (4.2 Uncore) 1.25V, reaching 75 degree temperatures. If I were to use IntelBurnTest the temperatures would increase pretty dramatically, though. Edit 2: AIDA64 is weird. The interface in AIDA claims the temperatures are a stable ~60 with peaks (spikes) of 76. HWMonitor flails rather wildly from value to value, from 63 to 72 to 59 to 78. Edit 3: After an hour+ of prime95 and then another hour with AIDA64, my CPU seems stable as hell at 4.6GHz. I will mess with it a bit more tomorrow, but the temperatures are approaching 85° even on my Noctua NH-D14 (with the system pushed to 1.260V because of AIDA64), so I'll probably just be looking for ways to reduce the temps more than I am trying to squeeze some more MHz out of the system. Any information you guys can give me would be appreciated. Priming on Large FFTs isn't a good way to use P95. Prime on 8Ks or Blend for a few hours. Then you need to play games, different types for an hour or two per game and see if the CPU fails. I don't really think your CPU is stable with such light stress testing. | ||
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udgnim
United States8024 Posts
typical timeframes for when I've seen BSODs using P95 blend are <1 hour, 3-4 hours, 5-6 hours the stress tests are more for trying to find your max overclock speed ASAP for whatever max voltages you are willing to feed into the CPU imo or you can just just overclock to what you think is "stable" and use your computer for real world activities. if you don't get any instability for 1 week, then increase speed by 100 MHz. if you experience instability, then increase voltages or decrease OC speed. you can also run a mix of stuff to see if that will produce any kind of instability like Cinebench Uniengine 3dMark http://www.primatelabs.com/geekbench/download/windows/ any any other type of benchmark stuff out there | ||
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mav451
United States1596 Posts
I used to bother with Unigine in the past, but considering I've had x264-unstable OCs easily pass on these, I would not waste my time with this in the end. If you're x264-stable, you're probably more stable than most overclocks on the Net. People who think Linpack/IBT represent stable overclocks are being silly. These are fast ways to check, but will consistently fail in P95 and eventually in real-world use. | ||
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Military
32 Posts
On August 19 2013 03:32 mav451 wrote: Small FFT is alright, but as it doens't stress RAM/IMC, it's fairly academic in nature. Read - not really useful for 24/7 OCing. It's for this reason that I still value Large FFT more than small, but only to augment custom blend. I usually start with Large FFT followed by overnight Blend. However - I would still follow-up both of this with x264 work at the very end; as x264 stresses the CPU differently than P95. I used to bother with Unigine in the past, but considering I've had x264-unstable OCs easily pass on these, I would not waste my time with this in the end. If you're x264-stable, you're probably more stable than most overclocks on the Net. People who think Linpack/IBT represent stable overclocks are being silly. These are fast ways to check, but will consistently fail in P95 and eventually in real-world use. If he isn't overclocking his RAM, or he knows that his RAM is stable... few hours of small FFTs + few hours of blend would be the better combo than large FFTs. That's if he is not OC'ing his RAM or he knows it is stable. If he is also overclocking his RAM or does not know if it is stable or not, then he can do blend for a longer time. Priming + x264 + play games + folding will pretty much tap into almost every little corner of different types of calculations that the CPU will ever need to do and decide if it is 99.9% stable or not. | ||
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mav451
United States1596 Posts
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Military
32 Posts
On August 19 2013 03:47 mav451 wrote: I did say 'augment' in my post. Since the advent of the IMCs, I've felt that small FFTs have not had much if any relevance for stress-testing. Real world loads (gaming or x264) will be moving and utilizing lots of RAM. Small FFTs will basically only test your CPU/cache - what good is that for real-world relevance? :p Honestly, it does nothing when it comes to real-world usage. I mean, that's pretty much every synthetic stress test algorithm. None of us will be crunching the same algorithm endlessly (at least most of us won't be). | ||
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Cyro
United Kingdom20326 Posts
If he isn't overclocking his RAM, or he knows that his RAM is stable With haswell if you leave the secondary voltages as they are, you can become unstable because of a RAM setting just by changing your core multiplier, it's not as simple as that. Also, i think prime95 with avx is a really terrible stress test for Haswell Aylear, your VIN (VRIN) is far too high, apply LLC and manual it to 1.75 if you don't know what to do with it and you'd be stable on less vcore, especially for the lower clocks Your uncore is also at 39x, probably on auto ring voltage, which can present instability ESPECIALLY if you are pushing core clock up so i'd always suggest to just manual it to like 34x/30x (not 35x) and manually set 1.15 ring voltage or something like that for OC Both of those are really important. You should really keep ram/uncore down and mess with core for a while - lots of testing, and bring stuff up slowly. I tried like you to throw up core/uncore/ram, passed a ton of stress tests and was laughing but actually not stable in the loads i actually wanted to use the system for (gaming and x264) until i spent weeks revising overclock It'd be easier to help with OC if we could discuss and try settings etc, if you want to do that | ||
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mav451
United States1596 Posts
On August 19 2013 04:00 Military wrote: Honestly, it does nothing when it comes to real-world usage. I mean, that's pretty much every synthetic stress test algorithm. None of us will be crunching the same algorithm endlessly (at least most of us won't be). I don't know why you're so stuck on using small-FFTs. My point is that anything not testing the IMC will have 0 real-world relevance. You are welcome to waste your time using small FFTs, but I imagine most users will want to be as efficient with stress-testing as possible. *This is also EXACTLY why I don't recommend IBT or LinX (or its equivalents) as being useful stress testers. They don't touch the IMC at all, and guess what, once you start using your PC for actual applications (games or encoding), your IMC is going to get stressed hard. So unless you play games that can fit into JUST your CPU cache (e.g. SuperPI), then you are wasting your time. | ||
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Ropid
Germany3557 Posts
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mav451
United States1596 Posts
I've never seen IBT/LinX as anything more than quick thermal tests. Thermal testing is important of course, but I wouldn't classify them as anything more useful than that. | ||
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Aylear
Norway3988 Posts
On August 19 2013 04:00 Cyro wrote: It'd be easier to help with OC if we could discuss and try settings etc, if you want to do that I'm game. Do you want to do it through the forums, or Skype or whatever? | ||
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