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Haswell Overclock Thread
- Thread starter Wucked
- Start date
indeed!
- Joined
- 9 Apr 2012
- Posts
- 13,166
My chip does 4.5ghz 1.275v with Ddr3 2400mhz c10 tuned, temps rocket the 85c as soon as I start p95 but a Delid will remedy that
Much better than mine
. 80 degrees at 3.9GHz and at stock voltage. Won't even post with your settings.I've had poor clocking 4770k, got a little luckier third time around. There's just so much variance in ability. My first chip wouldn't post 4.4ghz at 1.4v, yet this one is stable at 1.2v for 4.4ghz.
One thing I would love is for 8 pack to do a memory overclocking guide for z87, there's just so many options I just don't know what combination works well. Primary and secondary timings I'm good with but tertiary timings are just wayyyyy beyond what z77 offered.
One thing I would love is for 8 pack to do a memory overclocking guide for z87, there's just so many options I just don't know what combination works well. Primary and secondary timings I'm good with but tertiary timings are just wayyyyy beyond what z77 offered.
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Over the weeks I have had time to push my overclock further. I bought an Asus z87 Gryphon and intel 4670k on launch day btw.
The below is a summary of voltage and clock scaling. I overclock using adaptive voltage and quoting the load turbo voltage only.
CPU Clock and Voltages | Cache Clock Voltage:
4.3ghz - 1.156v | 4.0ghz - 1.060v
4.4ghz - 1.200v | 4.0ghz - 1.060v
4.5ghz - 1.238v | 4.3ghz - 1.100v
4.6ghz - 1.275v | 4.5ghz - 1.185v
I haven't tired pushing for 4.7 yet. My max self imposed voltage ceiling is 1.3 volts. I usually test with Intel Extreme Tuning Utility first for two hours. Then leave it at that and play some games / PCSX2 / Dolphin and adjust voltages if required. I dont bother with synthetics because if its stable for me on the software I use then I'm happy.
I dont understand why people would use synthetics and then complain about temperatures. Real World things never get that hot.
The below is a summary of voltage and clock scaling. I overclock using adaptive voltage and quoting the load turbo voltage only.
CPU Clock and Voltages | Cache Clock Voltage:
4.3ghz - 1.156v | 4.0ghz - 1.060v
4.4ghz - 1.200v | 4.0ghz - 1.060v
4.5ghz - 1.238v | 4.3ghz - 1.100v
4.6ghz - 1.275v | 4.5ghz - 1.185v
I haven't tired pushing for 4.7 yet. My max self imposed voltage ceiling is 1.3 volts. I usually test with Intel Extreme Tuning Utility first for two hours. Then leave it at that and play some games / PCSX2 / Dolphin and adjust voltages if required. I dont bother with synthetics because if its stable for me on the software I use then I'm happy.
I dont understand why people would use synthetics and then complain about temperatures. Real World things never get that hot.
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Damnit... 
This is the *THIRD 4770k* I've had in my machine, and STILL I can't get 4.4Ghz stable. Either I'm doing something very, very stupid, or I'm having incredibly bad luck with CPUs.
This chip is definitely the coolest running of the three (runs at about 62-66C at 4.3Ghz with 1.28v in Prime95), but I can't get 4.4Ghz stable at any voltage. Even tried 1.38v, which gives me temps in the high 80s, but Prime95 and IBT always crash after 2 mins or so. Adding extra Vcore doesn't seem to have any appreciable effect - I get roughly the same level of stability (1-3 mins on Prime or IBT) at anything from 1.2v right up to 1.38v.
Anyone have any bright ideas or things I might have overlooked? I've tried all the usual tricks (wide range of chipset voltage, adjusting BCLK to 125 stepping, different RAM, different BIOSes etc). The board is a Gigabyte UD4H. I used this RAM and motherboard to win 8-Pack's 4Ghz super-pi challenge, so I know that they can be pushed... Just the CPU that doesn't like to run quickly.
This is the *THIRD 4770k* I've had in my machine, and STILL I can't get 4.4Ghz stable. Either I'm doing something very, very stupid, or I'm having incredibly bad luck with CPUs.
This chip is definitely the coolest running of the three (runs at about 62-66C at 4.3Ghz with 1.28v in Prime95), but I can't get 4.4Ghz stable at any voltage. Even tried 1.38v, which gives me temps in the high 80s, but Prime95 and IBT always crash after 2 mins or so. Adding extra Vcore doesn't seem to have any appreciable effect - I get roughly the same level of stability (1-3 mins on Prime or IBT) at anything from 1.2v right up to 1.38v.
Anyone have any bright ideas or things I might have overlooked? I've tried all the usual tricks (wide range of chipset voltage, adjusting BCLK to 125 stepping, different RAM, different BIOSes etc). The board is a Gigabyte UD4H. I used this RAM and motherboard to win 8-Pack's 4Ghz super-pi challenge, so I know that they can be pushed... Just the CPU that doesn't like to run quickly.
My second 4770k was just like yours, it just wouldn't be stable above a certain voltage. My current 4770k is stable at 4.5ghz 1.28v but only when I increased vring to 1.35v and vrin to 1.85v. Any lower on those voltages and it's unstable. Any higher on vrin and it's also unstable.
I think you've got a bad chip, if it needs 1.28v for 4.3ghz then the jump up in voltage for the next multi might be rather high. My chip will boot 4.6ghz but so far I can't get it stable even with an extra 0.1v vcore.
I would try playing with vrin and vring, proved important for me at 4.5ghz.
I think you've got a bad chip, if it needs 1.28v for 4.3ghz then the jump up in voltage for the next multi might be rather high. My chip will boot 4.6ghz but so far I can't get it stable even with an extra 0.1v vcore.
I would try playing with vrin and vring, proved important for me at 4.5ghz.
Interesting... I haven't pushed Vring quite that high. I'll give it a go
Regarding 4.3Ghz, I may be able to get away with lower voltages - I've been focusing on 4.4Ghz so far. Each of my three chips has been able to manage 4.3Ghz stable at some voltage or other, but none of them have been able to manage 4.4.
Getting a bad chip I can understand (it happens to everyone at some point). But three bad chips out of three?! This one has great temps (a clear 10C cooler than the other two chips I tried), but still can't seem to manage the high frequencies. Which is a little odd.
...BTW this is the chip that 8-Pack sent with the pi-thread loot. Thanks again for that 8-Pack
Regarding 4.3Ghz, I may be able to get away with lower voltages - I've been focusing on 4.4Ghz so far. Each of my three chips has been able to manage 4.3Ghz stable at some voltage or other, but none of them have been able to manage 4.4.
Getting a bad chip I can understand (it happens to everyone at some point). But three bad chips out of three?! This one has great temps (a clear 10C cooler than the other two chips I tried), but still can't seem to manage the high frequencies. Which is a little odd.
...BTW this is the chip that 8-Pack sent with the pi-thread loot. Thanks again for that 8-Pack
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There is no magic formula.
HW just doesn't overclock well.
You will have to keep buying chips till you get one that is an OK clocker.
Even then when you have a 'good one' it will not run heavy loads for long periods.
It is frustrating as I see great gains in number crunching power over IVY but I cant use it.
Clock for clock I am seeing gains of 35-40% over IVY running AVX code.
However I have to run very modest clocks in comparison to IVY/Sandy.
When pushed with AVX code HW blue screens with insufficient voltage or shuts down when you up the vcore to keep it stable.
This issue with AVX code is known about and some attempts have been made to fix it.
ASUS boards set on adaptive increase the core voltage massively when AVX code is run to try to stop the crashing but in reality all it does is make the VR's panic and shut the chip down.
In a nutshell Haswell is not suitable for heavy loads when Overclocked.
I take it you don't subscribe to the. just run normal stuff and never test for stability school.
I guess not, or you would just post AIDA screenies at 4.8
HW just doesn't overclock well.
You will have to keep buying chips till you get one that is an OK clocker.
Even then when you have a 'good one' it will not run heavy loads for long periods.
It is frustrating as I see great gains in number crunching power over IVY but I cant use it.
Clock for clock I am seeing gains of 35-40% over IVY running AVX code.
However I have to run very modest clocks in comparison to IVY/Sandy.
When pushed with AVX code HW blue screens with insufficient voltage or shuts down when you up the vcore to keep it stable.
This issue with AVX code is known about and some attempts have been made to fix it.
ASUS boards set on adaptive increase the core voltage massively when AVX code is run to try to stop the crashing but in reality all it does is make the VR's panic and shut the chip down.
In a nutshell Haswell is not suitable for heavy loads when Overclocked.
I take it you don't subscribe to the. just run normal stuff and never test for stability school.
I guess not, or you would just post AIDA screenies at 4.8
I've got mine under water, delidded and temps are still insane. I wouldn't go higher than 1.35v vring mind, that was my own limit and it worked . Vrin I messed with a bit, lowering it to 1.7v, increasing it to 2.1v, 1.85v works best for me.
I've also had 3 4770k, first was awful, second not much better, 3rd one is better, not great but will suffice.
Temps aren't going to limit your overclocking, delidding hasn't given me any extra headroom, just much better temps.
4770k seem random in quality, very unfortunate to get 3 consecutive bad ones though.
. Vrin I messed with a bit, lowering it to 1.7v, increasing it to 2.1v, 1.85v works best for me. I've also had 3 4770k, first was awful, second not much better, 3rd one is better, not great but will suffice.
Temps aren't going to limit your overclocking, delidding hasn't given me any extra headroom, just much better temps.
4770k seem random in quality, very unfortunate to get 3 consecutive bad ones though.
<snip>
I take it you don't subscribe to the just run normal stuff and never test for stability school.
I guess not, or you would just post AIDA screenies at 4.8
I would love to, but I'll be using the machine to run simulations on a fairly regular basis (as part of my work). While the CPU loads won't quite compare to stress testing, they can get to well over 90% load on all four cores. I'd rather know that the system is "stable" to give me confidence in the results. A half hour of Prime95 is generally what I consider to be "stable", but I'm a long way off that right now.
As for the rest - yeah it's a pain. I'm not going to buy any more chips though... I'll just stick with what I have now and wait to see what Broadwell brings to the table.
This CPU is a little odd as well... the default Vcore in BIOS is 1.36v (??).
Caporegime
- Joined
- 18 Sep 2009
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- 30,505
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- Dormanstown.
Is broadwell actually going to replace Haswell on 1150? On the roadmap it just says Haswell refresh, then there's rumours of Broadwell just being mobile.
Well with X79 coming to a end have decided to go Haswell or should it be renamed Hades as its Hotter than Hell, lol.
But dreading the silicon lottery got my all my components listed including my custom loop.
I have no idea... I'm working on old information (I keep up to date with GPU developments but not so much CPUs). I guess I'll look at whatever the Haswell replacement is (which should be a process shrink by Intel's tick-tock approach).
Well with X79 coming to a end have decided to go Haswell or should it be renamed Hades as its Hotter than Hell, lol.
But dreading the silicon lottery got my all my components listed including my custom loop.
X79 isn't finished yet
IB-E launches shortly and with the benefit of hindsight the money I spent on HW would have been better spent on a 4930K.
supposed to be yes and for desktop too,it will be meh compared to what skylake brings though