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post #931 of 3335
I have to try it, since I've never changed the CSM option from the default.
post #932 of 3335
OK smile.gif , the testing I did was simply based on mobo posting with display when asking Lordkag to help with UEFI/GOP mod.

Case 1

My Fury X from factory had non UEFI ROM. CSM enabled mobo post, CSM disabled mobo not post, which is to be expected as it has no UEFI/GOP in ROM.

Case 2

Flash Fury X with UEFI ROM from AMD community site. CSM enabled mobo post, CSM disabled mobo post, which is to be expected as it has UEFI/GOP in ROM.

Case 3

Flash Fury X with modded ROM with stock UEFI/GOP module. CSM enabled mobo post, CSM disabled mobo no post. Comparing result of case 2 & 3 I came to conclusion UEFI/GOP module has detected modification in Legacy section of ROM.

Case 4

Flash Fury X with modded ROM with modded UEFI/GOP module. CSM enabled mobo post, CSM disabled mobo post. Comparing result of case 3 & 4 supports conclusion drawn from case 2 & 3.

Just be aware:-

i) Windows 7 (regardless of partion type) it will not boot into OS with CSM disabled on my mobo. I'll just sit at the frozen windows logo splash screen. Regardless if install is UEFI mode for OS, Windows 7 can be installed UEFI mode but bit of chore to get it that way, I did do it though.

ii) When using the modded UEFI/GOP you can't have Secure boot enabled, otherwise mobo will detect that the signature in UEFI/GOP module is "broken".
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post #933 of 3335
Quote:
Originally Posted by gupsterg View Post

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

Great, you are the best! thumb.gif You can explain the process to do it? in case i want modify another vbios? Thank you very much!
post #934 of 3335
No worries smile.gif .

So far the Polaris ROMs I've viewed have all had UEFI/GOP module at offset location E600, so below instructions are based on that. If UEFI/GOP is not at that offset location then search for text string GOP in ROM and determine beginning of it. There usually is empty data between Legacy/UEFI sections (ie 00 or FF repeated for varying length).

i) Open the modified ROM I posted in HxD.
ii) Press CTRL+E, in box Start-offset enter E600, in box Length enter E6A9, press OK.
iii) Right click the selected area and copy.
iv) Open the ROM you wish to add modded UEFI/GOP module, press CTRL+G, in box Offset enter E600, press OK, press CTRL+B to do "paste write".
v) You'll see the pasted data in red, if after that there is still old data (ie you see other hexadecimal values instead of FF being repeated) overwrite those Hexadecimal with FF (repeat as required). Note at 0x38000 is SMC firmware (AFAIK) I wouldn't overwrite that.
vi) Save file in HxD, then open file in Polaris bios editor and save to fix checksum and flash file.

Some other info you may like to know (Click to show)
The UEFI/GOP module is universal, at x point AMD implemented this (some info on Fernando's Win-RAID forum). From what I understand as long as it has ID, etc within it for the relevant GPU it will work. The UEFI/GOP module was the version supplied with stock Polaris 10 ROMs, therefore anything up to Polaris 10 it will work IMO.

Right at the beginning of the UEFI/GOP module is a section which must have Device ID matching Device ID as in Legacy ROM section.


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post #935 of 3335
Perfect, i think i got. You explained super easy. Thanks for your time!

BTW Here is my firestrike result modded timing for 1625 pure,,, i need to test yor mix

RX 480 Nitro oc+ 8gb 1400mhz@1150v and mem 2100mhz@950v

http://www.3dmark.com/3dm/15814120

Here core stock 1340mhz@1100v and mem 2100@950v

http://www.3dmark.com/fs/10665918
post #936 of 3335
No worries smile.gif . Sweet result on your RX 480 thumb.gif. You'll gain or lose no performance by using the modded UEFI/GOP. All it is for is low level UEFI "stuff".
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post #937 of 3335
Quote:
Originally Posted by gupsterg View Post

OK smile.gif , the testing I did was simply based on mobo posting with display when asking Lordkag to help with UEFI/GOP mod.

Case 1

My Fury X from factory had non UEFI ROM. CSM enabled mobo post, CSM disabled mobo not post, which is to be expected as it has no UEFI/GOP in ROM.

Case 2

Flash Fury X with UEFI ROM from AMD community site. CSM enabled mobo post, CSM disabled mobo post, which is to be expected as it has UEFI/GOP in ROM.

Case 3

Flash Fury X with modded ROM with stock UEFI/GOP module. CSM enabled mobo post, CSM disabled mobo no post. Comparing result of case 2 & 3 I came to conclusion UEFI/GOP module has detected modification in Legacy section of ROM.

Case 4

Flash Fury X with modded ROM with modded UEFI/GOP module. CSM enabled mobo post, CSM disabled mobo post. Comparing result of case 3 & 4 supports conclusion drawn from case 2 & 3.

Just be aware:-

i) Windows 7 (regardless of partion type) it will not boot into OS with CSM disabled on my mobo. I'll just sit at the frozen windows logo splash screen. Regardless if install is UEFI mode for OS, Windows 7 can be installed UEFI mode but bit of chore to get it that way, I did do it though.

ii) When using the modded UEFI/GOP you can't have Secure boot enabled, otherwise mobo will detect that the signature in UEFI/GOP module is "broken".

Tested it and indeed, modifying the legacy section prevents the system from completing the boot if CSM is disabled. Need to look what it is about biggrin.gif
post #938 of 3335
We touched on it in Fiji bios mod wink.gif .

So either I made no sense or I had been overwhelming with info redface.gif .

Anyhow IMO this is the reason, point 3 page 20 of this PDF.

So basically UEFI/GOP module in VBIOS refs the signature in Legacy section. The UEFI/GOP module in VBIOS has a signature which is only checked by mobo UEFI if Secure boot is on.

AFAIK Lordkags mod to UEFI/GOP module in VBIOS circumvents checking Legacy section signature but as the UEFI/GOP module in VBIOS has no updated signature it will fail check by mobo UEFI if Secure boot is on.

The UEFI/GOP module is compressed within VBIOS IIRC (apologies if you knew that or if I've picked up wrong info), UEFITool & UEFIRomExtract maybe handy, I just did not have a) experience b) time to meddle with this and was grateful when Lordkag provided the modded UEFI/GOP module.
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XPS - R7 1700
(14 items)
 
XPS - i5 4690K
(12 items)
 
XPS - Q6600
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CPUMotherboardGraphicsRAM
Ryzen 7 1700 Asus Crosshair VI Hero Sapphire Fury X@1145/545 G.Skill Trident Z 2x 8GB 3200MHz C14 
Hard DriveCoolingCoolingCooling
Samsung Evo 840 ThermalRight Archon IB-E X2 + 2x TY143 ThermalRight TY-143 2x front case intake Arctic Cooling F12 + 2x F9 as rear case exhaust 
OSMonitorKeyboardPower
Win 7 Pro x64 / Win 10 Pro x64 Asus MG279Q Cherry MX-Board 3.0 Cooler Master V850 
CaseMouse
SilverStone TJ06 Logitech G700S 
CPUMotherboardGraphicsRAM
i5 4690K@4.9GHz 1.255V Asus Maximus VII Ranger Sapphire Fury X@1145/545 HyperX Savage 2x8GB 2400MHz C11 
Hard DriveCoolingOSMonitor
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post #939 of 3335
What's the status on reference RX 480 modding?
Is 1750 strap on 2000 still the best to do in terms of memory?
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post #940 of 3335
Hey everyone hope someone can help me figure out what's going on. I have 2 MSI rx 470 4gb gaming x gpus. I modded the first one when I got it and the bios flash went fine. Now when I install the new one if either of them are flashed with custom bios it doesn't recognize either of them properly and I lose the capabilities to control them in msi afterburner and they wont show up in gpu-z. When they are both with stock rom they work fine and I can overclock that way. I've checked and they both have the same vram so that's not it either and I'm stumped as I'm kinda new to this. Thanks for the help and any advice in advance.
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