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Warning, J3455B/J3455-ITX/J4205-ITX BIOS brick !
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Gorbush View Drop Down
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Joined: 15 Apr 2018
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Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gorbush Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2018 at 7:29pm
Can someone check if the newest BIOS for this Apollo Lake CPU provide microcode update (version 2E) to support protection against Spectre and Meltdown threat?

You can do this with inSpectre tool (http://www.guru3d.com/files-details/download-inspectre.html) from Guru3D or preferably SpeculationControl PowerShell script from Microsoft (https://www.powershellgallery.com/packages/SpeculationControl/1.0.7).

Are you protected from BOTH?
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McLeft View Drop Down
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Originally posted by Gorbush Gorbush wrote:

Can someone check if the newest BIOS for this Apollo Lake CPU provide microcode update (version 2E) to support protection against Spectre and Meltdown threat?

J3455B 1.70:

System is Meltdown protected: NO!
System is Spectre protected: YES
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Gorbush View Drop Down
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Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gorbush Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 2018 at 3:17pm
Thanks McLeft. I've got similar result.
It is very strange that BIOS update (CPU microcode) seems to protect against Meltdown. Even when Intel's employee says so: https://communities.intel.com/thread/122453. That's why Windows doesn't activate KVAShadow protection.


Edited by Gorbush - 16 Apr 2018 at 3:18pm
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wilnel View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wilnel Quote  Post ReplyReply Direct Link To This Post Posted: 19 Apr 2018 at 7:09am
mine came pre-bricked 3 motherboards and none worked off the bat. no help from anyone in the forum or from this company..and to top that off I spent 2 months sending back and getting another one, sending back getting another one.
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gen_angry View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gen_angry Quote  Post ReplyReply Direct Link To This Post Posted: 30 Apr 2018 at 5:30am
Hello, where did you find these later BIOS images?

I have the J3455B-ITX in my HTPC and the latest BIOS I could find was 1.30 released in 2017. 

Thank you.
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McLeft View Drop Down
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Points: 16 		Post Options Post Options   Thanks (0) Thanks(0)   Quote McLeft Quote  Post ReplyReply Direct Link To This Post Posted: 30 Apr 2018 at 7:33am
Originally posted by gen_angry gen_angry wrote:

Hello, where did you find these later BIOS images?

It can be found on theirs FTP: ftp://asrock.cn/BIOS/CPU/
But i would stay with 1.30
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tgellen View Drop Down
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Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tgellen Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jul 2018 at 8:59pm
I have a J4205-ITX on 1.4 and I'm getting MCE errors in Linux and wanted to flash to 1.5 or 1.6 via Instant Update from a USB stick to see if this fixes the issue. Will it only brick if I use the Windows/DOS version. (I don't have either Windows or DOS on this board!)

Is it safe to flash 1.5 or 1.6 via Instant Update?

Cheers.
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kped View Drop Down
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kped Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2018 at 2:49pm
Hello to All,

I am having some issues with my J3455B-ITX @ 1.70
It is not bricked but it will give me 5 short beeps after every restart and there will be no video output during POST. Board keeps booting normally and video resumes as soon as the windows driver is loaded. However video will not resume after sleep whenever the 5 beeps have been heard on startup. When the system is turned on after a shutdown everything works normally (i.e no beeps, video during POST and video resumes after sleep in windows). All these problems started after I updated to 1.7.

I want to downgrade to 1.3 as I had no problems with the system whatsoever back then. Instant Flash will not detect the BIOS image for 1.3 on my flash drive. I have already tested two different FAT32 formatted flash drives and I know for sure that the BIOS file is the correct one. I assume that the board does not allow BIOS downgrading for some reason.

Moreover the DOS way of updating does not work for me. The flashing process does not start after the restart for some reason.

Does anyone have any suggestions on how I could downgrade the BIOS back to 1.3?

Thank you very much in advance.

Regards,
kped.
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gen_angry View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gen_angry Quote  Post ReplyReply Direct Link To This Post Posted: 06 Aug 2018 at 10:27am
Hello again,

Is the J455B-ITX 1.70 image safe to instant-flash now? It's been a few months since this post.

Thank you.


Edited by gen_angry - 06 Aug 2018 at 10:27am
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Mad_Max_Belarus View Drop Down
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Points: 1 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mad_Max_Belarus Quote  Post ReplyReply Direct Link To This Post Posted: 16 Aug 2018 at 12:45am
hello! i need dump bios j3455b-itx
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