J3455B-ITX Official FW 1.20 No C7-C8-C9-C10 states
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=5980
Printed Date: 06 May 2024 at 7:13am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: J3455B-ITX Official FW 1.20 No C7-C8-C9-C10 states
Posted By: kped
Subject: J3455B-ITX Official FW 1.20 No C7-C8-C9-C10 states
Date Posted: 03 Sep 2017 at 5:59pm
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" rel="nofollow - Hello to All. I have recently purchased an ASRock J3455B-ITX motherboard and I updated the firmware to the latest official (1.20) in order to get vt-d support. However, I notice now that the maximum processor C state that I can select in BIOS is C6 instead of C10. Has this been done on purpose on the newer firmware? Is there something I need to do in order to get the C10 option back? Can you please advise on this issue? Regards, kped.
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Replies:
Posted By: parsec
Date Posted: 03 Sep 2017 at 7:05pm
The 1.20 UEFI/BIOS update contains an Intel processor microcode update, which may be the cause of the loss of C States beyond C6. Or it might be related to VT-d, since the higher C States increase latency of IO devices, which VT-d is said to improve by Intel. If CPU C States Support is enabled in the CPU Configuration screen, then whatever C State option settings that are available should be shown. Did you try setting the Power Gear option in that screen to Eco Mode? I don't know which setting of that option is the default. ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
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kped wrote:Posted By: kped
Date Posted: 03 Sep 2017 at 9:01pm
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Hello parsec and thank you very much for your prompt reply. No matter what option I choose for either vt-d or Power Gear (or any combination between them) the maximum available C state that I get with FW 1.20 is C6. Do not get me wrong, I am perfectly happy with the board and the system's power consumption in general. I just want someone who either has specific knowledge or the same board to confirm that this is indeed the case (C6 being the highest processor C state available) with the new BIOS version and that is not something else that is causing this behavior with my board. Regards, kped.
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Posted By: kped
Date Posted: 06 Sep 2017 at 1:48pm
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" rel="nofollow - BUMP! Anyone from ASROCK care to reply and give a definite answer about the exact behavior of FW 1.20 on this specific board? It shouldn't take more than 60 seconds to test. Is there any other process in place from ASROCK to offer technical support to their customers? Regards, kped.
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