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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 93

post #921 of 3299
I've searched around and can't seem to find
Quote:
Originally Posted by Echoa View Post

The Nitro 480 shouldnt be too locked down, also there is a bios switch you might want to flip to the turbo/not quiet mode. You can edit the bios your self its fairly simple with the tools in OP

Hey, thanks for the reply, I'm actually getting it tomorrow or Wednesday, depending when the mail gets delivered, am working on getting all the tools available so when I get it I can just flash and go. My main change I want to do is max input voltage, as with water, I should be able to cool it pretty good, especially since VRM's are under a block also. I've played around with the bios editor, and it's quite nice, shouldn't be too tough to mess with the voltage table, and I'll play with the timings once I get a baseline OC going.

Cheers
post #922 of 3299
Quote:
Originally Posted by jeb101 View Post

I've searched around and can't seem to find
Hey, thanks for the reply, I'm actually getting it tomorrow or Wednesday, depending when the mail gets delivered, am working on getting all the tools available so when I get it I can just flash and go. My main change I want to do is max input voltage, as with water, I should be able to cool it pretty good, especially since VRM's are under a block also. I've played around with the bios editor, and it's quite nice, shouldn't be too tough to mess with the voltage table, and I'll play with the timings once I get a baseline OC going.

Cheers

You shouldnt be limited its got a decently high voltage threshold on default, just use polaris bios editor to edit it when you get it. Everything you need is in the OP to do it yourself
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post #923 of 3299
I hit 1440/2000 in my msi 480 gaming,i cant oc more stable pc crash,i wonder what must change for better oc,i know to flash bios,any help for bios editing?
post #924 of 3299
Quote:
Originally Posted by gupsterg View Post

@FricoRico

No worries smile.gif, as you have only single bios chip card I wanted to double check before releasing that all the checks I can do are done smile.gif . My buddy has the ROM and should report back soon. I also did some custom ROMs for a RX 470 for another member, so I should have 2 differing cards/motherboard results to know if UEFI/GOP is good to go.

There is a "Digital Signature" in Legacy section, AFAIK a hash of the hashes of data/command tables.

i) Early WIN OS drivers ref it to know the ROM has not been modified from it's factory setup, later drivers will usually stop ref'ing it (N/A to Linux driver). Been like this since HD 7xxx series, as this "Digital Signature" in ROM was discussed for stopping bios mod on that as well early on.

ii) Then this "Digital Signature" is forming part of "Secure boot", ref page 20 of this PDF. AMD ROM is "Hybrid" (ie Legacy section + UEFI/GOP module), I think option 3 is used in context of discussion. Note the PDF is 2011 and HD 7xxx series launched around then.

So what happens is when mobo is in "pure UEFI mode" (CSM=Off) the UEFI/GOP module in VBIOS is authenticating "Legacy Section", as we have modified "Legacy Section" and not updated the "Digital Signature" we will get post issue.

So Lordkag modified the UEFI/GOP module in VBIOS so it's not authenticating "Legacy Section" (my understanding), so now a modified ROM will work with mobo in "pure UEFI mode" (CSM=Off), but as the UEFI/GOP module in VBIOS has been modified and it's "Digital Signature" has not been updated to reflect changes we can't use "Secure boot".

Legacy Section & UEFI/GOP have their own individual "Digital Signature". The "Legacy Section" does not check it self for modification, the UEFI/GOP module in VBIOS does. The UEFI/GOP module in VBIOS does not check it self for modification the motherboard UEFI does (only if "Secure Boot" is enabled).

This is my understanding from reading things and experience with ROM mod, so maybe subject to errors in explanation redface.gif .

Hey man you can make a vbios for me? I have a RX 480 Sapphiere Nitro oc+ 8gb. I modded the bios using polaris bios editor and put the 1625 mhz tiimings and works fine. But as you indicate in your comments i can no longer use the fast boot. Can you fix this for me? You need the original bios o the modded bios? Thanks. thumb.gif
post #925 of 3299
In OP of Fiji bios mod thread, heading Using GOPupd tool to update/add UEFI/GOP module so custom Fiji ROM will work with CSM=Off you will find GOPupd tool with instructions/video on using it thumb.gif .
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post #926 of 3299
Quote:
Originally Posted by gupsterg View Post

In OP of Fiji bios mod thread, heading Using GOPupd tool to update/add UEFI/GOP module so custom Fiji ROM will work with CSM=Off you will find GOPupd tool with instructions/video on using it thumb.gif .

I have a Polaris Ellesmere architecture is the same? thanks man! biggrin.gif
post #927 of 3299
Quote:
Originally Posted by gupsterg View Post

In OP of Fiji bios mod thread, heading Using GOPupd tool to update/add UEFI/GOP module so custom Fiji ROM will work with CSM=Off you will find GOPupd tool with instructions/video on using it thumb.gif .

I try but dont work:

"You already have the latest available GOP!" Any ideas? Here is the room
https://drive.google.com/file/d/0B-a7uC3WrRwIbVRxd1JyaXBoVUU/view
post #928 of 3299
Sorry I forgot that as Polaris has same version of UEFI/GOP tool will not work doh.gif .

I have manually added the Lordkag UEFI/GOP module to your ROM smile.gif .

RX480_Nitro_OC_GOP_MOD.zip 111k .zip file
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post #929 of 3299
I have no issues in modifying Polaris bioses, without correcting anything else but the 8-bit checksum. Also all of the bioses for RX 460 - RX 480 cards are already UEFI binaries. Why would you tamper with the UEFI section of the bios? I'm not disabling CSM either.
post #930 of 3299
If you have CSM enabled your not even using the UEFI/GOP module in ROM from what I have seen with my mobo smile.gif . If you're not disabling CSM then you will not have an issue with modded ROM smile.gif . Disabling CSM creates "pure UEFI" environment from what I understand.

Windows 8/10 from what I saw on my setup will install as "Legacy" bios mode when CSM is enabled. Yep going "pure UEFI" doesn't bring a noticeable difference to "PC usage experience". Reading some things online, depending on mobo, some have odd implementation of UEFI, that if you wish to boot from GPT/EFI partition and have CSM enabled it will not do it and expect MBR/Legacy. Hence if you are in that situation and have modded ROM then your "scuppered".

On my Asus Maximus VII Ranger all Hawaii/Fiji cards did not boot with CSM disabled with modded ROMs. Lordkags UEFI/GOP mod fixed that for me on Fiji (and for other members with other mobos), as I'd sold off my Hawaii cards prior to gaining UEFI/GOP from Lordkag I could not test it on them frown.gif .
Edited by gupsterg - 11/4/16 at 4:05am
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