ASRock Forums : ASRock B85M-HDS & B85M Pro4 C6/C7 Support https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 15 Apr 2026 23:12:17 +0000 Fri, 11 Mar 2016 04:40:20 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=2057 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[ASRock B85M-HDS & B85M Pro4 C6/C7 Support : I copy what I have posted at overclock.net...]]> https://forum.asrock.com/forum_posts.asp?TID=2057&PID=11261&title=asrock-b85mhds-b85m-pro4-c6-c7-support#11261 Author: softskiller
Subject: 2057
Posted: 11 Mar 2016 at 4:40am

I copy what I have posted at overclock.net long ago:

I don't really understand the C-States of my Asrock B85M Board with latest BIOS and Haswell Xeon E3-1231 v3 CPU.

BIOS says "Enable CPU C States Support for power saving. It is recommended to keep C3, C6 and C7 all enabled for better power saving"

I use tools like ThrottleStop or RealTemp TI to read out the used C-States over time under various loads.


If C3 Enabled, C6 Enabled, C7 Enabled: only C7 is used.

If C3 Enabled, C6 Enabled, C7 Auto: only C6 is used.

If C3 Auto, C6 Auto, C7 Auto: only C3 is used.

If C3 Auto, C6 Enabled, C7 Auto: combination of C3 and C6 is used.

If C3 Auto, C6 Auto, C7 Enabled: only C3 and C7 are used but no C6.

If C3 Auto, C6 Enabled, C7 Enabled: still only C3 and C7 are used.

If C3 Auto, C6 Auto, C7 Auto: only C3 is used.

So it seems: C6 or C7 are only used when set to Enabled and only the highest Enabled one is used - never C6 AND C7.
C3 is only used in combination with C6 or C7 when set to auto but not when set to Enabled.
When C6 and C7 are set to Auto Asrock will not use them at all, even when system is idle.

The goal should be that a combination of C-States is used depending on the load of the system for a good balance of energy saving and processing responsiveness.

Only to use C7 with highest latency even under heavy load like gaming is not perfect. Other faster C-states like C3 must not get ignored and are there for a reason.

I wonder if I should only use C3 or a combination of C3 with C6 OR C7, while C3 with C6 AND C7 is not possible.

(Nothing overclocked)
]]> Fri, 11 Mar 2016 04:40:20 +0000 https://forum.asrock.com/forum_posts.asp?TID=2057&PID=11261&title=asrock-b85mhds-b85m-pro4-c6-c7-support#11261 <![CDATA[ASRock B85M-HDS & B85M Pro4 C6/C7 Support : It just seems that these boards...]]> https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10905&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10905 Author: tualatin
Subject: 2057
Posted: 01 Mar 2016 at 12:38pm

It just seems that these boards just don't allow Haswell processors to enter deeper sleep states. Just tested a Celeron Haswell here, and it's the same. Minimum vCore ~0.816. Looks like an RMA is in order for me. Sad. Looks like I am not the only one experiencing this issue.

Does the ASRock support personnel check these forums at all?


Edited by tualatin - 01 Mar 2016 at 12:46pm]]> Tue, 01 Mar 2016 12:38:08 +0000 https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10905&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10905 <![CDATA[ASRock B85M-HDS & B85M Pro4 C6/C7 Support : All sorts of tools available on...]]> https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10650&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10650 Author: tualatin
Subject: 2057
Posted: 23 Feb 2016 at 11:48pm

All sorts of tools available on the market, that includes AIDA64, CPUID HWMonitor and CPU-Z. Either, ASRock hasn't included C6/C7 support for these server chips or the above monitoring tools are just misbehaving with my combination, in which case I expect some sort of feedback from ASRock.

I've tried to ask for help using the ASRock Contact form but to no avail. Both of my messages have gone unnoticed. Alternatively, I will have to start equipping my builds with MSI boards instead. Have yet to have an issue with their 1150/1151 boards supporting modern power-saving features (C7s, SpeedShift, etc).

In case, you are curious, I am having this problem with the E3-1265L model. Have tried 4 chips so far, 3 different B85 ASRock boards, all sorts of BIOS'es, etc. Nada! And yes, this is a big deal for me. 

Thanks for your reply anyway.


Edited by tualatin - 24 Feb 2016 at 12:00am]]> Tue, 23 Feb 2016 23:48:52 +0000 https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10650&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10650 <![CDATA[ASRock B85M-HDS & B85M Pro4 C6/C7 Support : What are you using to monitor...]]> https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10649&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10649 Author: parsec
Subject: 2057
Posted: 23 Feb 2016 at 11:37pm

What are you using to monitor VCore on the ASRock and MSI boards? The same program on both boards?

I don't have a Xeon on an ASRock Intel 8 series chipset board, but I do on a Z97 board. The Z97 board fully allows the processor to go into the C6 and C7 states, at times showing the seemingly impossible 0.000V VCore. That is the same as I see with the equivalent Haswell 4000 series processors.

You must be careful to monitor the true VCore, rather than the VID. That varies depending upon which monitoring program is being used.
]]> Tue, 23 Feb 2016 23:37:15 +0000 https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10649&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10649 <![CDATA[ASRock B85M-HDS & B85M Pro4 C6/C7 Support : Hi.Do these boards properly support...]]> https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10647&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10647 Author: tualatin
Subject: 2057
Posted: 23 Feb 2016 at 8:45pm

Hi.

Do these boards properly support Haswell ulta-low power modes with a Xeon chip?

I've got a dozen of low power Xeon processors but the idle voltage never goes below the ~0.6-0.7v mark with every C power state ticked in w/ a certified HW PSU, on the latest BIOS as well. On my MSI board for example, I can see the voltage drop down to mV levels quite regularly. Maybe the Xeon isn't fully supported on these boards?

Anyone else experienced the same sort of thing?

Cheers.


Edited by tualatin - 23 Feb 2016 at 8:48pm]]> Tue, 23 Feb 2016 20:45:05 +0000 https://forum.asrock.com/forum_posts.asp?TID=2057&PID=10647&title=asrock-b85mhds-b85m-pro4-c6-c7-support#10647