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Haswell Overclock Thread
- Thread starter Wucked
- Start date
Yeah definitely, I'd be disappointed now If I couldn't get a stable 5ghz, it's way beyond my initial expectations though, I'm upgrading from a Q6600 @ 3.5 and would've been more than happy with a 4.3 -4.5 Haswell.
L311B515.
Same as mine! 4.8ghz at 1.2v, But with air its hitting 95c so I had to turn it off 20mins into it!
Coming from an i7 920 my experience of Haswell has been positive.
Without delidding mine is prime stable at:
4.4Ghz 1.140V 65°C
4.5Ghz 1.2V 70°C
4.6Ghz 1.272 78°C
4.7Ghz 1.332 90°C
For perspective my i7 920 used to require 1.275v to hit 3.8Ghz and under full load would quickly be pushing north of 80°C. It wasn't 100% stable either, at any voltage.
I run my 4770k at 4.4Ghz for 24/7 usage and its cool, quiet, relatively power efficient and a great performer. Noticeably more powerful than my previous CPU. Yet I'm regularly told that its evil because of rose tinted sandy bridge, and therefore I've made a bad purchase.
If cpu frequency is your primary focus then stay with sandy, otherwise for balls-out multi threaded performance you've got sandy-E / ivy-E at double the cost. Either way the reality is that Intel's focus is shifting, and unless AMD do something spectacular with their next release we're going to be stuck here for a while.
After that little rant though I will say that I'm not entirely satisfied yet, and that I plan to delid soon. I just haven't gotten around to it yet.
Without delidding mine is prime stable at:
4.4Ghz 1.140V 65°C
4.5Ghz 1.2V 70°C
4.6Ghz 1.272 78°C
4.7Ghz 1.332 90°C
For perspective my i7 920 used to require 1.275v to hit 3.8Ghz and under full load would quickly be pushing north of 80°C. It wasn't 100% stable either, at any voltage.
I run my 4770k at 4.4Ghz for 24/7 usage and its cool, quiet, relatively power efficient and a great performer. Noticeably more powerful than my previous CPU. Yet I'm regularly told that its evil because of rose tinted sandy bridge, and therefore I've made a bad purchase.
If cpu frequency is your primary focus then stay with sandy, otherwise for balls-out multi threaded performance you've got sandy-E / ivy-E at double the cost. Either way the reality is that Intel's focus is shifting, and unless AMD do something spectacular with their next release we're going to be stuck here for a while.
After that little rant though I will say that I'm not entirely satisfied yet, and that I plan to delid soon. I just haven't gotten around to it yet.
Soldato
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^^ Any advice for a stable 4.4Ghz OC.
What bios settings do you use? Do you disable features etc?
What bios settings do you use? Do you disable features etc?
Are you having stability problems?
Off the top of my head XMP, static vcore, C3 state and EIST enabled instead of offset. There are a few other tweaks I made that I can't remember atm. I'll take a look when I get home and post later.
Off the top of my head XMP, static vcore, C3 state and EIST enabled instead of offset. There are a few other tweaks I made that I can't remember atm. I'll take a look when I get home and post later.
Last edited:
Soldato
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Yeah clocking these seems a lot different compared to Sandy / Ivy. I'm not heat limited at 4.4Ghz and the voltage seems fine @ 1.25v. Random lockups with Intel burn test. Tbh anything apart from stock seems to cause problems with it. Be cool if you could post your bios settings if you get time later. Will try your settings, see if works.
8pack scurries off to the stores Lol. Heh 8pack - if you find any , save me one please.
Mark
Soldato
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Hey bud, can you explain what 39 cache multiplier is? Any help with getting my chip @ 4.4Ghz 24/7 would be appreciated.
The CPU clock and cache clock (often called uncore) multipliers can be set distinctly. Many guides recommend to keep it to x1 to x3 below the CPU clock, though in my experience it can also be lowered a bit, so you can use a lower cache voltage and thus generate less heat. Doing so may also help stability. The cache multiplier doesn't matter much for performance either, so keeping it lower is quite okay.
Soldato
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Thanks, if someone could post a screenshot of their bios setup would be helpful. So many options lol.. Right now I'm running the CPU @ stock. Aiming for 4.2Ghz - 4.4Ghz 24/7 use..
I'm not sure how well settings translate from one board to another ... available settings do vary a bit, and what the settings are named is quite inconsistent. Rather than throwing settings your way I'll paste this here instead which I wrote a while ago over at Tweaktown, I hope it's helpful:
Other than going by the info in 3 Step Guide to Overclock Your i7 / i5 Haswell Platform | Overclockers, what I've found to be a good way to get to a stable overclock on my Haswell 4770K on the AsRock Z87 Extreme 6 is this:
- Get your memory to default (slower) settings, no overclocking yet!
- Choose a default OC profile in UEFI based on the clock you determined using the 3-step guide above, and boot into Windows. If it won't boot into Windows, pick the next lower OC preset.
- For your initial OC settings and as per the 3 step guide, you probably want to use the "override" voltage setting, as you have only one value to work with which simplifies things a little.
- Using Intel® Extreme Tuning Utility (Intel® XTU), lower the voltage, run a stress test for 5-10 min, if it's stable save that profile, lower voltage again, etc. Repeat this until you start crashing, and you should now have an overclock with basic stability. On each step, lower the voltage by about 20mV (.020V) or so. I used 10mV, but that was a lot of repetition to get to the lower voltage. Make sure the CPU doesn't start throttling; if it does, you probably have too much voltage (the CPU is getting too hot). Once it starts throttling the speed penalty is massive, so you don't want any throttling. If the voltage can't be lowered while still keeping it stable, you'll have to lower the clock.
- Use the AIDA64 Stability Test to determine whether the overclock is still stable. If you lowered the voltages etc as far as you can with XTU, you'll probably crash at this stage as AIDA64 seems a bit more aggressive. You'll have to up the voltage a little, and do so until AIDA64 is stable as well. You'll probably see higher temperatures from AIDA64 stability testing than from XTU stress testing, but you won't see these temperatures in regular day to day use.
- Finally, encode a feature length movie with Handbrake. It is likely this will crash you again, but if it doesn't, you've most likely reached good stability at the given clock. Again if it crashes, increase the voltage a bit and try again.
- Now that you found the settings to use through XTU, you can take a note of these (through either your saved profile on hwbot on another computer or phone, or write them down) and dial them in to the bios accordingly.
- At this point you could work on getting the maximum out of your memory as well, though you won't see major benefits there.
- If you still see crashes after, nudge the voltage up a little again. You may also want to play with the "uncore" (CPU Cache multiplier) frequency, the general recommendation is to keep it at around 0.3GHz to 0.1GHz lower than the core clock. Mine is currently at 43x with a 46x clock.
You can also try importing my 4.6 OC (adaptive voltage) profile from XTU and work with that for the steps above, you can find it here: http://hwbot.org/xtu/download/2667 ... you'll likely need to tweak to get stable.
Finally, I also posted a set of screenshots from my UEFI settings over at Tweaktown: http://forums.tweaktown.com/asrock/53271-asrock-z87-extreme-6-uefi-1-90-a-3.html#post45990
Other than going by the info in 3 Step Guide to Overclock Your i7 / i5 Haswell Platform | Overclockers, what I've found to be a good way to get to a stable overclock on my Haswell 4770K on the AsRock Z87 Extreme 6 is this:
- Get your memory to default (slower) settings, no overclocking yet!
- Choose a default OC profile in UEFI based on the clock you determined using the 3-step guide above, and boot into Windows. If it won't boot into Windows, pick the next lower OC preset.
- For your initial OC settings and as per the 3 step guide, you probably want to use the "override" voltage setting, as you have only one value to work with which simplifies things a little.
- Using Intel® Extreme Tuning Utility (Intel® XTU), lower the voltage, run a stress test for 5-10 min, if it's stable save that profile, lower voltage again, etc. Repeat this until you start crashing, and you should now have an overclock with basic stability. On each step, lower the voltage by about 20mV (.020V) or so. I used 10mV, but that was a lot of repetition to get to the lower voltage. Make sure the CPU doesn't start throttling; if it does, you probably have too much voltage (the CPU is getting too hot). Once it starts throttling the speed penalty is massive, so you don't want any throttling. If the voltage can't be lowered while still keeping it stable, you'll have to lower the clock.
- Use the AIDA64 Stability Test to determine whether the overclock is still stable. If you lowered the voltages etc as far as you can with XTU, you'll probably crash at this stage as AIDA64 seems a bit more aggressive. You'll have to up the voltage a little, and do so until AIDA64 is stable as well. You'll probably see higher temperatures from AIDA64 stability testing than from XTU stress testing, but you won't see these temperatures in regular day to day use.
- Finally, encode a feature length movie with Handbrake. It is likely this will crash you again, but if it doesn't, you've most likely reached good stability at the given clock. Again if it crashes, increase the voltage a bit and try again.
- Now that you found the settings to use through XTU, you can take a note of these (through either your saved profile on hwbot on another computer or phone, or write them down) and dial them in to the bios accordingly.
- At this point you could work on getting the maximum out of your memory as well, though you won't see major benefits there.
- If you still see crashes after, nudge the voltage up a little again. You may also want to play with the "uncore" (CPU Cache multiplier) frequency, the general recommendation is to keep it at around 0.3GHz to 0.1GHz lower than the core clock. Mine is currently at 43x with a 46x clock.
You can also try importing my 4.6 OC (adaptive voltage) profile from XTU and work with that for the steps above, you can find it here: http://hwbot.org/xtu/download/2667 ... you'll likely need to tweak to get stable.
Finally, I also posted a set of screenshots from my UEFI settings over at Tweaktown: http://forums.tweaktown.com/asrock/53271-asrock-z87-extreme-6-uefi-1-90-a-3.html#post45990
Soldato
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^^ Thanks will have a look through that now 
What Uncore speed and what DRAM speed you running. You dont show the memory tab which with Haswell is also important.
Shari seriously no need!!! Just use your PC to see if its stable for what you do!!! All that stability testing who care!!! when it may well crash opening a browser or a game. Your Uncore recommendation is spot on at 4.6/4.3 is fine, 4.4 ideal at 5ghz you want 4.6/4.7.
Been having a play with my new 4770K and it is definitely better than the first one .
It's no where near as good as others have been posting in this thread but at least I can get a stable 4.5ghz at 1.35v. Will need to delid though to run daily as temps soar above 85c in seconds under stress.
.It's no where near as good as others have been posting in this thread but at least I can get a stable 4.5ghz at 1.35v. Will need to delid though to run daily as temps soar above 85c in seconds under stress.
i do suspect that a lot of the 'amazing' chips are run at 39 cache. so its not a level playing field in that regard. and to people overclocking properly, they shouldn't judge their chips based on people who leave their cache at stock.
Been having a play with my new 4770K and it is definitely better than the first one
It's no where near as good as others have been posting in this thread but at least I can get a stable 4.5ghz at 1.35v. Will need to delid though to run daily as temps soar above 85c in seconds under stress.
what kind of stress? if its p95 etc then dont bother reducing. i bet it wont get near that in normal use.