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Improved overclocking for Haswell with updated microcode (+ update CPU microcode through software)

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post #1 of 279 (permalink) Old 11-29-2017, 07:16 AM - Thread Starter
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Hello fellow Haswell/Devil's Canyon overclockers!

I made posts in various threads on this topic but have decided to make a thread to keep information and testing from getting buried.

Summary: The latest CPU microcode 22 (released in 2017) improves overclocking for Haswell over previous microcodes. I found this out accidentally, but have found the improvement over previous microcodes to be 100% reproducible, and another user has posted similar results. To update your BIOS' microcode and try for yourself, follow the simple steps in the spoiler below.

So far this has been replicated multiple times by myself, LostParticle, several users on reddit and users in this thread. Reported voltage reduction for a given clockspeed varies from 0.04 to 0.01v with an average of 0.02v, depending on CPU and initial overclock stability. For some this is enough to increase their clockspeed beyond what was possible before, for others it means running the same clocks at lower voltages and temperatures.

For me, I went from 4.7GHz to 4.8 at the same voltage of 1.3v, and got [email protected], a clockspeed that originally crashed with my motherboard BIOS' stock microcode 19 on starting a x264 stress test. I even found 5GHz to be within stable reach.

Steps for updating microcode: Warning: Spoiler! (Click to show)
DISCLAIMER: This involves flashing your motherboard with an edited BIOS. If you don't feel comfortable with this, don't attempt it. I take no responsibility for failed BIOS flashes.

This simple process is done through the UBU tool and instructions found in this guide: https://www.win-raid.com/t154f16-Tool-Guide-News-quot-UEFI-BIOS-Updater-quot-UBU.html. Either use the extensive guide found on the thread, or use the guide below.


1. Download the latest UBU tool from the linked thread.

2. Download MMTool.exe and put it into the folder with the UBU.bat file. A copy can be found here under the link MMTool (aptio 5): http://voltground.com/haven/threads/13/

3. Acquire a copy of your BIOS from the manufacturer's product support site or otherwise.

4. Run UBU.bat and select your saved BIOS file. Once all the modules have loaded, navigate to the CPU microcode section by pressing 7 and enter.

5. Press 1 and enter to navigate to the list of microcodes, type 17 for the latest broadwell microcode (makes no difference what you choose for broadwell) then type 22 for the Intel microcode (19 says it's the best for overclocking, but my testing says otherwise).

6. Hit 0 to exit, then hit 1 to save it with a USB BIOS Flashback compatible name. If you don't have an ASUS board it will let you keep the original BIOS name or leave it as bios.bin to be renamed as necessary.

7. *Back up your BIOS settings/profiles before flashing!* Flash the updated BIOS with your preferred method. While some motherboards allow the edited BIOS to be flashed conventionally, ASUS users must use USB BIOS Flashback to get around safety checks. Check online to see how best to update your motherboard's BIOS.

If you have an ASUS board without USB BIOS Flashback, the only known working method to flash your BIOS is with an SPI programmer (£4 on amazon) following this guide.

You could also try updating your microcode in software and bypass the need to edit your BIOS, detailed below.

Newest Haswell Microcode 23 (20/11/17) - worse OC potential than with 22 but protects against spectre hack:
Warning: Spoiler! (Click to show)
Killkernel found and tested an even newer microcode, 23 dated 20/11/2017 that is not currently included in the UBU package. His testing found greater improvements over 22, check out his post for instructions on where to find it. You can use the newer microcode by specifying the file through the UBU menu (make sure there are no spaces in the filepath leading to your microcode file, or in other words, put the microcode file on the desktop and go from there).

So far I have found overclocking with 23 to be on-par or possibly a little worse than with 22, with no additional headroom.

LostParticle observed a clear regression in overclocking headroom with microcode 23 over the previous 22.

Update microcode through software for Intel systems after sandy bridge - Needs more testing!:
Warning: Spoiler! (Click to show)
If BIOS flashing doesn't work for your board, try updating your microcode through windows instead. It will load the updated microcode at kernel load, so just as your computer starts to load into windows from the BIOS. It will override the BIOS' microcode so long as the BIOS' microcode version is older. It works with any SkyLake, Kaby Lake, Haswell, Ivybridge or Xeon equivalent motherboard/cpu running windows, but has not yet shown overclocking improvements in testing.

In my own testing I so far have not found software updated microcode to offer overclocking improvements as updated BIOS microcode does.

A one-click tool to do this can be found here, along with links to guides to do it without the tool.

Thanks to THEBOSS619 for the incredibly easy to use updating tool.

Motherboards reported as successfully flashed (this serves as a general guide - similar motherboards will most likely work too): Warning: Spoiler! (Click to show)
ASRock Z87 Extreme6

ASRock Z97 Extreme4

ASRock Z97 OC Formula

ASUS Z97-P

ASUS Maximus Hero Z87

ASUS Maximus VII Impact

AW17 R1/Ranger/R5

EVGA Z97 Classified

Gigabyte Z87X-UD4H

MSI Z97 MPOWER MAX AC

MSI Z87-GD65 Gaming

MSI Z97 Gaming 5

MSI Z97 G45 Gaming

I haven’t seen this microcode talked of anywhere else. I suspect it's because people lost interest in testing Haswell microcode by 2017 when 22 was released. In particular, this seems to be the reason why microcode 19 is stated to be the best for overclocking in the UBU tool, as not enough testing occurred to show 22's improvements. Good luck and happy overclocking! smile.gif

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post #2 of 279 (permalink) Old 11-29-2017, 09:11 AM
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im not afraid to experiment! only question i have is if it doesnt workout for me should i be able to flash back to the original bios without a hitch?

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post #3 of 279 (permalink) Old 11-29-2017, 09:15 AM
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Sub'd. Might try this with my Max VI Gene soon. If anyone does so before me, let me know!

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post #4 of 279 (permalink) Old 11-29-2017, 09:19 AM - Thread Starter
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Quote:
Originally Posted by SgtRotty View Post

im not afraid to experiment! only question i have is if it doesnt workout for me should i be able to flash back to the original bios without a hitch?

Hey smile.gif It is absolutely reversible, just flash with a stock BIOS and any updated modules (including microcode) will be overwritten.

I would add though - Back up your BIOS settings, because flashing your BIOS will most likely reset them/delete presets.

Happy testing to you and xioros!

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post #5 of 279 (permalink) Old 11-29-2017, 09:21 AM
 
 
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I also posted in the Haswell Overclocking Guide thread about it, but I'm gonna see how low I can go with VCore for 45x in comparison to before, and then afterwards see how much VCore 46x needs to be stable.

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post #6 of 279 (permalink) Old 11-29-2017, 09:39 AM - Thread Starter
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Quote:
Originally Posted by gonX View Post

I also posted in the Haswell Overclocking Guide thread about it, but I'm gonna see how low I can go with VCore for 45x in comparison to before, and then afterwards see how much VCore 46x needs to be stable.

Good luck you big benevolent-looking dragon person! smile.gif

It'll be interesting to see whether this improvement is on standard Haswell chips as well as devil's canyon. I really doubt it'd just be devil's canyon, but who knows (they are, after all, so very incredibly different /s). If only they made changelogs for their microcodes!

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post #7 of 279 (permalink) Old 11-29-2017, 02:05 PM
 
 
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So the results I'm getting so far is that my temperatures are much higher on the new microcode compared to the previous "best overclocking" one - enough of a difference that I am throttling hardcore on Blender.
The CPU wattage numbers reported in HWiNFO64 are about 7-8 watts higher than previously.

I'm gonna try resetting the BIOS to see if I accidentally changed some other setting.

/edit: BIOS reset and same voltage settings applied - temperatures and wattages are back to "normal" again. False alarm!

/edit2: it should be noted that I was tinkering with x46 as well, really pushing the voltages. Once I couldn't even get a shade of stability on x46 I went back to x45, but VCore, VRIN, VRing, VSA, VIOA and VIOD were set to the exact same values.

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post #8 of 279 (permalink) Old 11-29-2017, 03:36 PM
 
 
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So I think we might be on to something here. I'm now at 0.02v less than before, at a setting that would previously give me a 0x124 BSOD within minutes of x264, but it has now run for almost an hour without crashing.

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post #9 of 279 (permalink) Old 11-29-2017, 08:19 PM
...and you'll FLOAT TOO!!
 
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Just flashed my Z87-GD65, so far nothing is on fire, which is always in the plus column.... thumb.gif I'll have to do some testing to see if I'm reaping any benefit, but the goal should be lower voltages, correct?

UPDATE: At this moment, it looks like I was able to reduce my core voltage by about .01v, reducing by .04v resulted in a WHEA BSOD. I'll try to do more testing in the upcoming days though....
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post #10 of 279 (permalink) Old 11-29-2017, 11:10 PM - Thread Starter
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Okay! So improvements, but maybe not as dramatic as a 0.04v decrease for some. GonX, that sounds like the exact kind of improvement lostparticle and I had! Even if it is 0.02v that’s still less voltage required for free smile.gif

And blaze2210, I’m glad you’re trying it out! One goal is to run the same clocks at lower voltages, the other is to see if higher clockspeeds are now possible to achieve. I hope you can get more than 0.01v but if that’s the improvement you see it’s the improvement you see. Maybe have a go at getting 100mbz higher with slightly higher/the same voltages you’re running now.

EDIT

What kind of stress tests are people running? I’d recommend the x264 stress test found under the ‘stressing’ spoiler in Darkwizzie’s thread: https://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics

With my 4790k I run it with 16 threads at normal priority. It gets really unstable OCs within minutes, and an overclock stable overnight in that is one hatll be stable in games too. In my experience anyway!

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