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Ryzen BIOS mods + how to update BIOS correctly

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post #1391 of 1401 (permalink) Old 07-07-2019, 05:36 PM
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Ok followed the guide by Lermite to work on B350-F 5008, after using UBU to inject new microcode.

Noticed in hex editing that CPU, DF and UMC were apparently in one section after the hide value. I guess all three might unlock with the single edit?

After generating the new rom file, I realized I hadn't really looked into disabling or making visible Spread Spectrum options.

When I went back to AMIBCP, Sb Clock Spread Spectrum seems to appear in two places: Setup>Main>"Blank Folder", and also under Ai Tweaker.

What happens if it is set to "USER" in say Ai Tweaker, but not in the other location? If I want to set it to default Disabled, I assume I need to change it in both locations as well? Or is this option broken on new bioses anyway?

Also I assume it is safe to use AMIBCP on a rom to change settings after the HxD step, right?

Last bit is about FD44Editor and MAC / UUID stuff. I have tried searching but can't seem to find info for the settings in Data Format. I thought it should be "System UUID only" since checking the UUID via cmd in Windows gives an ID that has the MAC at the end of it. The only guide for this program I found was from 2010 and it just said that if GbE listed "not present" you use ASCII String option instead of GbE Region option. Didn't mention the top option at all. Anybody used this on an Asus B350 board? Read Reous's pdf with his bios where it shows using default System UUID only.

edit: I didn't use the two combo bioses in between, but in 5008 official there is a stupid screen with a blinking cursor in between splash at post. Yesterday when restarting the system, it seemed to freeze on this screen. Ended up hitting reset button. Also had a couple programs hang on close last night (Teamspeak and Origin).

I reflashed 5008 official and pulled the cmos battery. Will see if this happens again. If it does I am less motivated to try my modded 5008, although maybe I can make something better than Asus official.

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Last edited by hazium233; 07-09-2019 at 06:03 AM.
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post #1392 of 1401 (permalink) Old 07-07-2019, 06:06 PM
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Can ryzen 1st and 2nd gen owners on 300/400 Motherboards expect performance increases with new bios/agesa? New pbo features, RAM/IF decoupling and better RAM oc overall?
I saw Amd-Robert saying on reddit that biggest help for RAM oc was better imc but that new imc firmware is a big help too ( https://www.reddit.com/r/Amd/comments/c5mxv1/comment/es42fsl)

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post #1393 of 1401 (permalink) Old 07-11-2019, 08:00 AM
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Would it be possible to mod Asus ROG STRIX B450-F Gaming , BIOS and add DRAM Boot Voltage?

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post #1394 of 1401 (permalink) Old 07-11-2019, 01:54 PM
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Quote: Originally Posted by Unknownm View Post
Would it be possible to mod Asus ROG STRIX B450-F Gaming , BIOS and add DRAM Boot Voltage?
In general, yes.

Poking about in my B350-F bios (5008) I haven't seen it in there though. For things like Spread Spectrum and VDDP you should be able to "unhide" them if you follow one of the guides in the first post. But since I can't see Boot Voltage, I am not sure how to change it.

I would have thought on these boards that they just boot the set voltage, but I have no idea. Your B450 may be different of course, you can look at your bios with AMIBCP and see if it is in there.

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post #1395 of 1401 (permalink) Old 07-13-2019, 09:26 AM
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Another super weird thing I noticed is about the undervolt of my 2700X.
I can take 50mV (nothing more) off of the CPU voltage any day without a single hitch, including super heavy tests like Prime95 and Linpack Xtreme, but sometimes my PC doesn't boot (but I can enter the BIOS). If I shut it down and restart it everything is A-OK (stress tests included). A couple of times I had to set it at -35mV for booting purposes.
Yesterday I tried a bigger UV (-87mV). Everything worked perfectly, temps were lower, all good. Today I tried turning on my PC and still no boot, same after restarting. If I set the BIOS to -50mV everything is as usual. Strangely enough, I can't try it at -87mV, no boot but BIOS.

I am speechless to this inconsistent behaviour.

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post #1396 of 1401 (permalink) Old 07-14-2019, 01:47 AM
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Quote: Originally Posted by apple020997 View Post
Another super weird thing I noticed is about the undervolt of my 2700X.
I can take 50mV (nothing more) off of the CPU voltage any day without a single hitch, including super heavy tests like Prime95 and Linpack Xtreme, but sometimes my PC doesn't boot (but I can enter the BIOS). If I shut it down and restart it everything is A-OK (stress tests included). A couple of times I had to set it at -35mV for booting purposes.
Yesterday I tried a bigger UV (-87mV). Everything worked perfectly, temps were lower, all good. Today I tried turning on my PC and still no boot, same after restarting. If I set the BIOS to -50mV everything is as usual. Strangely enough, I can't try it at -87mV, no boot but BIOS.

I am speechless to this inconsistent behaviour.
If it helps it is consistent with how my 2700x behaves. The main problem seems to be getting the PC to boot at extreme undervolts and be stable when cold booting. Once system has been on a while it does undervolt lower.

I tried to work around this behavour unlocking AMD CBS and changing power states. I tried changing PO, P1 and P2 stock frequency for example setting P2 at 2GHz and P0 at 3.2GHz in order to hopefully get it to cold boot at lower undervolts. I did get some joy but it was still inconsistent.
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post #1397 of 1401 (permalink) Old 07-15-2019, 06:23 AM
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Guys,

Any help with an x370 Taichi - can it be modded at all? Just scouting this thread..

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post #1398 of 1401 (permalink) Old 07-15-2019, 12:18 PM
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Quote: Originally Posted by 0razor1 View Post
Guys,

Any help with an x370 Taichi - can it be modded at all? Just scouting this thread..
Nothing "done" , there is a representive of ASRock "JZ" on the German forums and he does work as a Systems Integrator, if you want to find him
He also accepts any kind of bios feature requests , aka unlocking stuff - as we normally had all the features open on X399

There will be mods after I find out how to trigger flashback on it and repair my semi-bricked taichi
So far I have no board to play with , soo the only person who does design BIOSes is JZ (which i've seen)
* before you mod it, be sure to find and remove the verification capsule, else you'll get problems

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Last edited by Veii; 07-15-2019 at 03:43 PM.
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post #1399 of 1401 (permalink) Old 07-16-2019, 06:14 AM
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If anybody has a modified Gigabyte Gaming 3 B350M bios, with all the unlocked features- let me know!

Last edited by viilutaja; 07-16-2019 at 07:02 AM.
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post #1400 of 1401 (permalink) Old 07-17-2019, 12:28 PM - Thread Starter
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8E38A88A - new AMD_CBS guide for ZEN 2

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How to update BIOS correctly + Unlocked AMD_CBS for Ryzen motherboard
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