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Fresh Install from USB Installer El Capitan 10.11.1 Beta Build 15B38b on Skylake i7 6700 + Gigabyte Z170-HD3


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Was able to downgrade to earliest bios on Z170-deluxe and it does indeed work :D INCLUDING my amd GPU which wasn't working before.

 

If you guys need another debugging/testing mule let me know. I'm available all day.

For what it's worth, I downgraded an Asus Z170M-PLUS to the earliest BIOS (215) and it's bricked.  Asus says send it back.  So you roll your dice and you take your chances, I guess.

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Looks like AMIBCP does see the option for IOAPIC on the gigabyte bios.   I'll modify this for the Z170X-UD5 when I am out from work.

 

Ah man. If only I had a clue how to work that tool myself. I'm on Gigabyte Gaming 3, F4 here. It would be helpful to know where to start.

 

And if these are the kind where you must dump then mod your own version of the BIOS, or if they can be modded of the orginal BIOS file (and shared for everyone).

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For what it's worth, I downgraded an Asus Z170M-PLUS to the earliest BIOS (215) and it's bricked.  Asus says send it back.  So you roll your dice and you take your chances, I guess.

How did you flash though? That really sucks... it didn't give me any issues using USB bios flashback.

 

 

As I'm writing this from my working install, my fresco logic USB3 controller arrives... lol

 

http://i.imgur.com/3Kcuhsl.png

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Ah man. If only I had a clue how to work that tool myself. I'm on Gigabyte Gaming 3, F4 here. It would be helpful to know where to start.

 

And if these are the kind where you must dump then mod your own version of the BIOS, or if they can be modded of the orginal BIOS file (and shared for everyone).

If I am able to modify and flash the bios successfully with the tool I can give modifying the bios for your motherboard.  Sad part is I am still at work for another 1 1/2 hours

how's this tool works? directly with bios on board or with flash images?

Just run it and open the bios file that you download from Gigabytes website.  I couldnt get it to save on the windows 10 vm I was running on my macbook pro.   I'll try when I get home on my Windows 7 machine and hopefully be able to successfully mod the bios.

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How did you flash though?

 

From the EZ-Flash tool within the BIOS, same as I had done about 5 other BIOS releases.  But after going back to the earliest BIOS, the board powers on and fans spin, but there's no video output (either integrated or with GPU).  Tried CMOS reset, tried the CrashFREE BIOS, no joy.  Bummer that they'd post a BIOS that kills the board.

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From the EZ-Flash tool within the BIOS, same as I had done about 5 other BIOS releases.  But after going back to the earliest BIOS, the board powers on and fans spin, but there's no video output (either integrated or with GPU).  Tried CMOS reset, tried the CrashFREE BIOS, no joy.  Bummer that they'd post a BIOS that kills the board.

wow that really sucks... Does your bios have a USB bios flashback button though? That flashes the bios without booting the system, so you -should- be able to flash back to a working version if you do.

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[r.e. this setting in the GIGABYTE Skylake Z170 BIOSes] Ah right so it's hidden menu (menu item not implemented). I am guessing a lot here but presumably we just load up manufacturer's stock bios file, switch it to 'always on' by modifying the value setting in the "Failsafe" column from "Disabled" --> "Enabled". Then resave the general file like you say.

 

I would caution also that re-saving a BIOS with the generic suppliers tool may fail to write back all necessary (e.g. Gigabyte-BIOS) specific extra bits. If the tool did not read / understand all bits when loading the file. Which can result in brick / failed boot. Not sure how risky it might be.

 

Sometimes it's a good idea to save out twice, the off + on, then diff the hex, find the bit that changed. Then patch that back into the original manufacturer's (e.g. Gigabyte's original file). It depends as often compressed / extracted etc. Of course I know very little about this stuff and may not be applicable here. That's just what I've heard / read about in theory / hearsay.

 

[EDIT] There also often checksum / when bits changed.

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Actually if you go under chipset in AMIBCP and change the access/use of IOAPIC 24-119 Entries to user instead of default the setting should appear in the bios and be able to be set there.  I just tried to do it for you guys, but it crashes the program when I go to save.  I am curious if this is just on my machine or everyones?  Anyway let me know if you guys have questions.  I only have windows currently on one machine so I cant try it on another.  I also don't have a z170 board yet, ive been waiting to buy one until we had some sort of OSX support going on.  I hope this helps someone!

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Actually if you go under chipset in AMIBCP and change the access/use of IOAPIC 24-119 Entries to user instead of default the setting should appear in the bios and be able to be set there.  I just tried to do it for you guys, but it crashes the program when I go to save.  I am curious if this is just on my machine or everyones?  Anyway let me know if you guys have questions.  I only have windows currently on one machine so I cant try it on another.  I also don't have a z170 board yet, ive been waiting to buy one until we had some sort of OSX support going on.  I hope this helps someone!

I was getting the crash as well when trying to save.  Maybe it is the version of amibcp.  I'll try on a windows 7 machine after dinner to try and modify the bios.

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Use the MMTool Aptio 5.01.0014 ( 32 or 64 bit version, depending what OS you have). I've successfully managed to modify the BIOS file ( F4 for Gigabyte Gaming 5).
But now the Qflash updater refuse to take this one....(says Invalid File )

 

 

Hello. I would strongly suggest someone go and be requesting this feature to the guys on TweakTown forums. Who already know how to make modified Gigabyte CFW BIOS. They seem to have the relevant expertise there and may figure it out a bit more quickly.

 

I've also put in a request to Gigabyte eSupport Direct. But that may take ages / if ever. So I am thinking that on TweakTown is really the best bet now.

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You can also use uefitool to extract the setup module and change the hex values to enable menus, but this is a PITA.  I can do this, but I'm currently working on an assignment for my CS class so it will have to wait.  I tried an older version of AMIBCP, but it doesn't show the bios options correctly so thats a no go.  I really don't understand why computer manufacturers choose to lock down features in the hardware that we paid for, maybe its just me....

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Yeah I'm trying that now, so far no luck but I have a sinking feeling I'm messing something up. If I continue having issues I'll make a separate thread about it.

 

 

EDIT: Because I'm super impatient I'm temporarily using VoodooHDA, which works fine. It also confirms that I'm not doing something right.

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Use the MMTool Aptio 5.01.0014 ( 32 or 64 bit version, depending what OS you have). I've successfully managed to modify the BIOS file ( F4 for Gigabyte Gaming 5).
But now the Qflash updater refuse to take this one....(says Invalid File )

 

Same, let me know if you figure it out.

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Where did you get that version of AMIBCP if you don't mind me asking, that is much later then what I have, and I would hazard to guess that is why we are having issues with the gigabyte boards!

There you go mate : http://www.mediafire.com/download/irxk9p1m43kfk68/AMIBCP_v5.0.1.7Z

 

Also, a SUPER noob question, what tool should i use to flash the .rom file on my MSI mobo? I can't find like... anything.

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I usually use a dos boot usb and afudos of the right variant, thank you very much for the AMIBCP!


I can conform that AMIBCP 5.01 lets you save modifications to the gigabyte bios, now for someone to test it, I am sending the modified rom to the person that requested it.

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