Can't overclock i7-5775C on Z97 Extreme9
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=1018
Printed Date: 23 Dec 2024 at 6:35am
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Topic: Can't overclock i7-5775C on Z97 Extreme9
Posted By: Galatian
Subject: Can't overclock i7-5775C on Z97 Extreme9
Date Posted: 14 Oct 2015 at 3:13am
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Hey, I recently switched from a i7-4790K to a i7-5775C on a ASRock Z97 Extreme9. I'm trying to overclock the processor (like I did with the i7-4790K) but it seems there is some kind of hard TDP limit, as the processor will downclock to stay within it's 65W envelope. How can I circumvent this problem? All I can see is a "Long Duration Power Limit" and a "Short Duration Power Limit" , as well as a "Primary Plane Current Limit", but whatever value I enter, it seems to have to affect to my problem. What exactly do I need to change to get the Broadwell CPU properly overclocked. Best
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Replies:
Posted By: ASRock Expert
Date Posted: 14 Oct 2015 at 3:48am
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Did You update Your EFI to 1.70? You can experiment with the 1.60 too. http://www.asrock.com/mb/Intel/Z97%20Extreme9/?cat=Download&os=BIOS ------------- 990FX Extreme 9 MOD P1.70 AMD FX 8120 4GHz 1.25V Thermalright HR-02 Patriot Viper 2x4GB 2133MHz Samsung 850 EVO 250GB MSI R7970 TFIII 3GB CORSAIR VX550W LanCool K62 Dragonlord ASUS Xonar D2X |
Posted By: Galatian
Date Posted: 14 Oct 2015 at 1:09pm
| Yes I did. Bios 1.70. No new version available for me. Resseted the Bios several times to no avail as well. I mean I can see the options that need to be changed (the power limits mentioned) but changing the values has no effects. I think the Bios is simply broken and there are too few users with the i7-5775C. |
Posted By: ASRock Expert
Date Posted: 14 Oct 2015 at 2:09pm
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Try the 1.60, it only cost some time, besides that, its free. ------------- 990FX Extreme 9 MOD P1.70 AMD FX 8120 4GHz 1.25V Thermalright HR-02 Patriot Viper 2x4GB 2133MHz Samsung 850 EVO 250GB MSI R7970 TFIII 3GB CORSAIR VX550W LanCool K62 Dragonlord ASUS Xonar D2X |
Posted By: Galatian
Date Posted: 15 Oct 2015 at 2:13am
| I tried both the p1.60 BIOS you recommended and a L1.81 that the ASRock Support sent me. To no avail. The CPU overclocks to the set multiplier, but will soon downclock to whatever multiplier needed to stay within it's 65W power envelope. |
Posted By: ASRock Expert
Date Posted: 15 Oct 2015 at 2:45am
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Put an USB stick to an USB2.0 port on the MBO, enter the UEFI and with the F12 - take screenshots of every menu and submenu - I don't have an Extreme9 at the moment, so I can't lookup the UEFI options. Post the images in this topic, so I can see what options are awayable in this MBO. Today I worked with an Z97 Extreme6 and a 4790K, OC-ed fine with the L2.00 and L2.10. ------------- 990FX Extreme 9 MOD P1.70 AMD FX 8120 4GHz 1.25V Thermalright HR-02 Patriot Viper 2x4GB 2133MHz Samsung 850 EVO 250GB MSI R7970 TFIII 3GB CORSAIR VX550W LanCool K62 Dragonlord ASUS Xonar D2X |
Posted By: Galatian
Date Posted: 15 Oct 2015 at 3:18am
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Here you go: http://postimg.org/image/55fdv4wmj/" rel="nofollow">  http://postimg.org/image/88g3yibl7/" rel="nofollow">  http://postimg.org/image/auvmfg2sr/" rel="nofollow">  http://postimg.org/image/9yz4zzt4b/" rel="nofollow">  http://postimg.org/image/5to8e2vcb/" rel="nofollow">  http://postimg.org/image/ar1sz6xbf/" rel="nofollow">  http://postimg.org/image/hnvzbptm3/" rel="nofollow">  http://postimg.org/image/hmm1iarsb/" rel="nofollow">  http://postimg.org/image/bbgu1vqjv/" rel="nofollow">  http://postimg.org/image/4mevzluln/" rel="nofollow">  http://postimg.org/image/f0b4f3pyj/" rel="nofollow">  http://postimg.org/image/4oyrmfy97/" rel="nofollow">  http://postimg.org/image/za8fu8r3f/" rel="nofollow">  http://postimg.org/image/s9kg1gpbf/" rel="nofollow">  http://postimg.org/image/vhoxeibl7/" rel="nofollow">  http://postimg.org/image/ugoopduln/" rel="nofollow">  http://postimg.org/image/8b4kz34mj/" rel="nofollow">  http://postimg.org/image/3rscdkmqz/" rel="nofollow">  http://postimg.org/image/6r3ueflm3/" rel="nofollow">
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Posted By: ASRock Expert
Date Posted: 15 Oct 2015 at 3:40am
Try this - save, and then re-enter and try overclocking:  ------------- 990FX Extreme 9 MOD P1.70 AMD FX 8120 4GHz 1.25V Thermalright HR-02 Patriot Viper 2x4GB 2133MHz Samsung 850 EVO 250GB MSI R7970 TFIII 3GB CORSAIR VX550W LanCool K62 Dragonlord ASUS Xonar D2X |
Posted By: Galatian
Date Posted: 15 Oct 2015 at 12:53pm
| This did not help. Temperature is not a Problem. It's trying to stay within it's 65W TDP envelope. What doesn't seem to work is the override for the short and long duration power limit. No matter what value I enter it will still clock down. |
Posted By: parsec
Date Posted: 15 Oct 2015 at 4:42pm
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Try this: Download and install the Intel Extreme Tuning Utility (IXTU), found here: https://downloadcenter.intel.com/download/24075/Intel-Extreme-Tuning-Utility-Intel-XTU-" rel="nofollow - https://downloadcenter.intel.com/download/24075/Intel-Extreme-Tuning-Utility-Intel-XTU- Open the main over clocking control screen, which will contain some of the same controls in the UEFI/BIOS. You must have the Intel Management Engine software for your board installed to allow you to change the settings in IXTU. You'll find the long and short duration power limit settings in IXTU, as well as the maximum current allowed to be applied to the processor. You can change the core multipliers, BCLK, and CPU voltages. In the lower right side of the screen, there are many processor attributes that can be monitored, including TDP. Most of them are not shown by default. Click on the little wrench icon within the display box, and a list of all the options will appear. Check those you want to monitor, particularly the TDP readings. IMO, IXTU is a great tool, but it might also give you some bad news. For Broadwell processors (I don't have one) IXTU should display a Configurable TDP control. That will not appear for other processors, since their TDP cannot be adjusted, and their TDP is not limited to the rated TDP. Either the configurable TDP option (if it exists, I hope it does) or the TDP reading shown in the monitoring options, will likely tell you if you will be able to exceed and/or adjust the specified TDP. That will be the good or bad news. Intel refers to the configurable TDP as "Configurable TDP-down". That worries me, since it implies that the TDP may only be adjusted lower. See that for yourself on your processors Specification page: http://ark.intel.com/products/88040/Intel-Core-i7-5775C-Processor-6M-Cache-up-to-3_70-GHz" rel="nofollow - http://ark.intel.com/products/88040/Intel-Core-i7-5775C-Processor-6M-Cache-up-to-3_70-GHz If you find some options displayed by grayed or dimmed compared to the others, those options are not adjustable with your processor. It is rare for every option to be open to modification, so don't be to concerned if you see a few of the options like this. Please let us know what you can or cannot do within IXTU with your Broadwell processor. We don't have many Broadwell users that have posted their experience with them here. At least I am very interested in what they are all about. I wish you luck in your over clocking quest!  ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
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Posted By: Galatian
Date Posted: 15 Oct 2015 at 10:29pm
| That worked! I have no TDPup or down option, but I can set the Turbo Boost Power Wattage and the Current Limit, which is exactly what I needed. Now I can see that the ASRock Settings do not actually work, so ASRock has to update their BIOS. Not sure if they are actually reading this though... |
Posted By: buyback
Date Posted: 17 Oct 2015 at 4:26am
| BTW same issue on Z97M Killer - only Intel XTU can raise the TDP to keep CPU from power throttling my Broadwell (I5 5675C) |
Posted By: parsec
Date Posted: 17 Oct 2015 at 10:22am
Great, glad that worked for you. I don't know personally if the UEFI Power and Current Limit settings on your board for a Broadwell processor cannot be set beyond a certain level. I'm not saying you are wrong, I just don't have a Broadwell processor. Just to be clear, you had set the Power and Current Limit settings in the UEFI to their maximum allowable values, and then found you could increase them beyond that in IXTU, right? When you run IXTU from a cold start/boot of the PC, and have not changed those limits in IXTU, or applied an IXTU profile, you should be able to see what their values were set to in the UEFI. Do you recall what those were? The maximum Power and Current Limit settings in the UEFI might be the Intel recommended max values for normal use of a Broadwell processor. While the these Broadwell 'C' processors can be over clocked, they are not a standard 'K' type processor. The TDP of the Skylake i7-6700K and i5-6600K CPUs is 91W, vs the 65W of the i7-5775C. The unique feature of Broadwell processors is their TDP can be configured to a lower value than their stock maximum. That also tells us IMO that they are not a typical 'K' type processor. Yes, IXTU lets you change the limits, but IXTU warns you that any OC is at your own risk. Perhaps ASRock does not want to risk damage to Broadwell processors, if users do so and then claim ASRock let them do that with UEFI settings. I'm just trying to explain why the limit options in the UEFI have the maximum set lower than for 'K' processor. I'm not saying you are wrong... or right to be honest.  Could you be more clear about which options "do not actually work", or are "broken"? Really meaning in what way do they not work, or are broken? ------------- http://valid.x86.fr/48rujh" rel="nofollow">
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Galatian wrote:Posted By: buyback
Date Posted: 19 Oct 2015 at 1:26am
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I know its unrelated to the OP motherboard but also lowering the TDP targets on v1.80 BIOS and Z97M Killer does not work (stays at the processors default Values on my i5-5675C) XTU works both ways. |
Posted By: buyback
Date Posted: 20 Oct 2015 at 5:05am
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Bios 1.90 released today fixes this issue on my Z97M Killer. TDP can now be set above (Asrock EZ OC sets this to 1000W shown in IXTU). Also setting a lower TDP like 40 works in BIOS to lower the TDP and power throttling kicking in earlier as expected. So all is well here now with the latest BIOS. 1.90 Also release for the OP Z97 Extreme 9 today - please try and report. Due to the microcode update I also hope it will fix the low multiplier speedstep bugs present in Broadwell where it was crashing speed stepping on low load before sometimes. Intel did release a microcode update for that and I just hope it was included here. Finally the broadwell seems to work (also OC to 4.1 on all cores 1.25v is now stable for my 5675c where it was only 4.0 before) Thanks Asrock ps: still no EDRAM multiplier clock setting available like on gigabyte and MSI :)
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Posted By: Galatian
Date Posted: 22 Oct 2015 at 2:44am
| Nope that did not help me at all. Still having the same issue. I can see the default values of Broadwell (roughly 80W as Short Time Power Limit and 65W as Long Time Power Limit; the only thing that apparently does get changed is the Ampere limit). |