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RED BIOS EDITOR and MorePowerTool for Polaris, Navi and Big Navi (Stable Versions)

4. BIOS-Flash

Now comes the last and yet no less important step, namely flashing the newly created BIOS back onto our card. This is necessary, because the Adrenaline driver since 2020 extremely restricts the execution of the SPPT stored in the registry. Whoever sets the PowerLimit, the clock or voltages too high will be punished with a GPU clock of 300 MHz which can no longer be raised. In order to circumvent this deliberately built in hurdle, only the PowerPlayTables, which are permanently stored in the BIOS, help.

Even if the checksum is correct, you still need a signed BIOS in the normal way. Since the RBE cannot provide this, also for legal reasons, we have to use a Flash tool that ignores this signature or does not test it. Furthermore, the graphics card in question must also be technically supported. Currently, only the Radeon RX 5700 and the RX 5700 XT(X) can be flashed with the tool linked here from the WWW. For the RX 5600 XT this flash tool would have to be adapted. Unfortunately, the Radeon RX 5500 XT is still completely excluded from this tools.

You have to download the Flash-Tool linked below. Afterwards start the command line window with “cmd” as administrator. Otherwise it does not work. Then change to the directory where the flash tool and the new BIOS file are located. To be able to flash at all, we first have to unlock the ROM. This is done, shown below, with the call parameter “-unlockrom” and the adapter number (here the first graphics card found is e.g. “0”).

Then we call up the flash tool again with the appropriate parameters and start the flash process. Attention! Flashing is at your own risk and can lead to a bricked BIOS if not done properly or if interrupted during the process. In this case, only a second, additionally operated graphics card will help.

After flashing, the computer must be restarted. We can already admire the new data in GPU-Z. In this case I had set the boost clock a bit higher. Now the value is no longer 1925 MHz, but 2104 MHz. In real terms the card reaches 2050 MHz with the right cooling.

But this is only the beginning, because everyone can still do some fine tuning, because finally I have also set new limits for the Wattman


5. Checking results and overclocking in the Wattman

Let us first look at the initial situation before the BIOS flash. 1250 mV and 2039 MHz were maximum possible with GPU tuning, the power limit was at maximum +50.

Now we look at Wattman after the BIOS Flash and with a little more room in Wattman. 1250 mV at 2121 MHz and 60% power limit. However, I would like to point out again that this is not a replica setting, but only shows exemplarily what would be possible if you proceed according to the terms of use for the software.



We make this software available here as it is and also ask you to refrain from any requests to the editors concerning its functionality and application. For all feedback all readers can use the forum including the active community for free. As a publication we are only the mediator between the R.B.R.T. and the readers of our website. In addition, the tool is available for download exclusively from this website via a special installer and it’s free.

All other sources may contain unauthorized or older versions or even malware. To avoid this, digital distribution of the software available here is explicitly prohibited, especially since this would also constitute a copyright infringement at the same time. Links may only be made to this website, but not to the download links themselves, whose URL we also change periodically.

For legal reasons, we cannot and may not offer the flash software required to flash the individualized experimental BIOSes created in this way for direct download, but we do offer links to versions that have been reported to us by the community as suitable. But also here we can not take any responsibility for the content of third parties. Whoever downloads and uses these programs also does so at their own risk and within the scope of the restrictions listed at the beginning.



The MPT is becoming more and more complex and the number of users is also increasing worldwide. Exactly there, however, registry interventions or the reading of certain parameters are often enough dependent on very many individual settings of the end users and their operating systems. While there are occasional bugs and constructive feedback, some of the newly implemented features are simply too important or special to really guarantee a stable operation on the broadest level right away.

We don’t want to offer you unfinished software and pretend that it’s the end user’s fault if it doesn’t work. That’s why we want to kill two birds with one stone with our beta program, because there you can find the current beta versions, in which you can find all the features that have just been added. Let’s just call it stability program and playground for the curious. If you want to be sure, choose the previous presence, where you can also find the download of the other programs.

Click here for the Beta-Program



Whoever downloads and uses the software linked here automatically accepts the terms of use (“Disclaimer”) listed on page one! If you receive an error message when downloading or starting our installation programs for the MPT or RBE, such as messages from inappropriate antivirus software that our official and licensed installation programs with Online Downloader detect as malware, you can safely ignore this. If in doubt, you should briefly deactivate the AV software during installation.

MorePowerTool (MPT)

– added support for Radeon RX VII
– no selection in Load PPT no longer loads default SPPT
– write button no longer writes zeros into registry if no SPPT is loaded
– some minor GUI fixes

– it is now possible to load SPPT from BIOS file
– some minor GUI and bug fixes

– merged BIOS File button with Load SPPT button
– minor bug fixes

– added Frequency tab
– added save function
– some minor GUI and bug fixes

– fixed VII overclocking

– support for RX 5500 (XT)

– new icon
– PPTable features
– minor bug fixes

– curve override

– more curve stuff

– support for RX 6800 (XT)
– minor bug fixes

– TGP, TDC fixed

– RX 6900 XT, RX 6700 (XT) added
– Radeon VII bug fix
– some minor fixes

– Navi 1X SoC Powersave Freq fixed
– Minor bugfixes

– Navi21 XTXH Support “Ultimate”

– minor fixes, first stable version


Red BIOS Editor (RBE) 1.0.1 Fixed VRAM issue
1.0.2 Fixed unicode problems
1.0.3 Timings were not completely saved (VRAM issue)
1.0.4 Fixed issue with BIOS files > 512 KB
1.0.5 DRAM Timing Editor
1.0.6 Polaris Support
1.0.7 Minor Bugfixes

Navi Curve Helper

This program allows you to calculate 
the offset curve parameters to set the 
“stock” voltages your RX Navi card via MPT.


Flash Tool 2.93+ Win
Works only for RX 5700 and 5700 XT(X)

Mirror #1

Mirror #2

Flash Tool 3.04+ Win
Works for all AMD cards,
please read the instructions first!

Mirror #1 (New!)

Mirror #2

Flash Tool Linux
Works on Linux systems only

Mirror #1

Mirror #2

Lade neue Kommentare



4 Kommentare 0 Likes

Does the Adrenaline 2020 driver still respect SPPT settings When They are lower than stock?
Wondering if I could use the MorePowerTool to get my undervolt & underclock to stick. Getting really sick of opening up RadeonSettings to find it has reset to stock. Considering setting maximum voltage to the auto-undervolt value of 1152.
Or will it continue to use a bad ratio and pair that voltage with a stupidly low clock speed?

Antwort Gefällt mir



19 Kommentare 1 Likes

Please ask him to fix 1mb bios handling. Just make use of first 512k of bios. And save also as 512k.

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21 Kommentare 5 Likes

Thanks a lot. Much appreciated.

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12 Kommentare 7 Likes

Good afternoon! Will RBE work with AMD RX5500XT in the future? We are from a small community of RX5500XT owners, we want to edit timings, but this is not possible right now, please help us)

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12 Kommentare 7 Likes

Or can you tell me how to patch the modified BIOS, if it changed the timings manually?

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325 Kommentare 383 Likes

Sorry, i haven't found the time to implement the 5500XT. Maybe in the future, but there are some differences and this means work.

You can find the timing straps inside the vram info table, but you will have to fix the checksum byte at offset 0x21 in the BIOS header. It is the least significant byte of the checksum of the legacy image, or image 1. The length is found at offset 0x02 right after 55 AA, and it has to be multiplied by 0x200. Any decent hex editor can calculate the checksum. Change the byte at 0x22 so the last byte of the checksum is 0x00.

Antwort 1 Like



12 Kommentare 7 Likes

Thank you for your time, I will definitely thank You! Please tell me how to calculate the checksum, there are a lot of algorithms, and where to write the result of multiplying the length and 0x200? Thanks

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12 Kommentare 7 Likes

Dear developer, our small community of rx5500xt owners is ready to make a donation so that you can add the ability to edit the BIOS) Help us!

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1,463 Kommentare 319 Likes


Do you still need help regarding properly modifying RX 5500 XT?

And please keep your donation for those who need it.

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12 Kommentare 7 Likes

Yes, I will be glad if you can help

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About the author

Igor Wallossek

Editor-in-chief and name-giver of igor'sLAB as the content successor of Tom's Hardware Germany, whose license was returned in June 2019 in order to better meet the qualitative demands of web content and challenges of new media such as YouTube with its own channel.

Computer nerd since 1983, audio freak since 1979 and pretty much open to anything with a plug or battery for over 50 years.

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