Can't overclock i7-5775C on Z97 Extreme9

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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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Galatian Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 Oct 2015 Status: Offline Points: 9	Post Options Post Reply Quote Galatian Report Post Thanks(0) Quote Reply Topic: Can't overclock i7-5775C on Z97 Extreme9 Posted: 14 Oct 2015 at 3:13am
	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

ASRock Expert Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 Oct 2015 Location: Croatia Status: Offline Points: 220	Post Options Post Reply Quote ASRock Expert Report Post Thanks(0) Quote Reply Posted: 14 Oct 2015 at 3:48am
	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

Galatian Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 Oct 2015 Status: Offline Points: 9	Post Options Post Reply Quote Galatian Report Post Thanks(0) Quote Reply 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.

ASRock Expert Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 Oct 2015 Location: Croatia Status: Offline Points: 220	Post Options Post Reply Quote ASRock Expert Report Post Thanks(0) Quote Reply Posted: 14 Oct 2015 at 2:09pm
	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

Galatian Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 Oct 2015 Status: Offline Points: 9	Post Options Post Reply Quote Galatian Report Post Thanks(0) Quote Reply 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.

ASRock Expert Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 Oct 2015 Location: Croatia Status: Offline Points: 220	Post Options Post Reply Quote ASRock Expert Report Post Thanks(0) Quote Reply Posted: 15 Oct 2015 at 2:45am
	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

Galatian Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 Oct 2015 Status: Offline Points: 9	Post Options Post Reply Quote Galatian Report Post Thanks(0) Quote Reply Posted: 15 Oct 2015 at 3:18am
	Here you go:

ASRock Expert Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 Oct 2015 Location: Croatia Status: Offline Points: 220	Post Options Post Reply Quote ASRock Expert Report Post Thanks(0) Quote Reply 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

Galatian Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 Oct 2015 Status: Offline Points: 9	Post Options Post Reply Quote Galatian Report Post Thanks(0) Quote Reply 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.

parsec Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 04 May 2015 Location: USA Status: Offline Points: 4996	Post Options Post Reply Quote parsec Report Post Thanks(1) Quote Reply Posted: 15 Oct 2015 at 4:42pm
	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- 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 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!