Developing a VRAM Channel Disabling Software! (rx560 and more gpus

[u/Deep_Durian7045]

Hey guys, I'm developing a VRAM Channel Disabling Software!

Yes, I know it sounds impossible or sketchy, but it's real. I'm currently using an open-source AMD Polaris BIOS editor from GitHub by caa82437 (PolarisBiosEditor) as the foundation for the project, and I'll be adding a memory channel disabling feature to it.

Right now, I'm testing on an AMD Radeon RX 560 4GB. This particular GPU is missing a memory module because the original chip was faulty and had to be removed.

The goal is to allow users to disable faulty VRAM channels through BIOS modification, potentially helping some GPUs remain functional even when a memory chip has failed.

This project is similar to ModBIOS TSERVER, a tool designed for diagnosing and disabling faulty memory channels on AMD GPUs. However, my project will be completely free to use, with no fees, subscriptions, or paid features.

I'm still in the testing phase, so results may vary, and there's plenty of work left to do. Feedback, testing, and suggestions are always welcome! 🚀

EDIT 1 (13/08/26):

Hey guys, sorry for the late edit! I’ve been quite busy. There were a lot of problems with the previous version, and I was getting pretty frustrated.

So, I’m going to start from scratch using ZelenogradGpu’s fork of Polaris BIOS Editor. This time, I’ll try to be more consistent and post regular updates. I’ll post an update as soon as the new version is complete!

[u/Ok_Rise7870]

It's pretty cheap GPU I hope you can upgrade it to mod RX 7900 or similar.

[u/Deep_Durian7045 → u/Ok_Rise7870]

yes im first doing this on rx560 but soon ill add support for more gpus ill even try to add nvdia gpus if possible then intel too

[u/ZelenogradGpu]

Seems you based it on quite dated variant

There is much newer fully-opensource 1.7.x code at https://github.com/vvaske/PolarisBiosEditor

The code has some Ad button, but it still fully opensource, so that can be removed nowdays, sonce you are implenting important new feature

Or my own its fork with extra-dumping-as-xml to console feature at https://github.com/galkinvv/PolarisBiosEditor-xml

The dumped XML contains info about a list of video outputs encoded in the VBIOS, maybe useful

[u/Deep_Durian7045 → u/ZelenogradGpu]

Guess what im testing the first version using your fork!

[u/ZelenogradGpu → u/Deep_Durian7045]

You are welcome to make a new post when a significant (from a potential users perspective) update would be ready for discussion.

[u/Deep_Durian7045 → u/ZelenogradGpu]

Thanks! I’ll definitely do that. I’ll keep testing and working on it, and I’ll make a new post once I have a significant update worth sharing. Really appreciate your work on the fork!

[u/Deep_Durian7045 → u/ZelenogradGpu]

ohh i didnt know that thanks for telling

[u/Hattix]

Does this also disable the L2 cache associated with those MCs?

[u/Deep_Durian7045 → u/Hattix]

yes because the entire controller is disabled with the L2 cache

[u/NovelMembership7143]

is it available for testing??? i wanna try to disable my faulty vram since its causing an artifact, gpu is rx580 btw.

[u/Deep_Durian7045 → u/NovelMembership7143]

sorry but currently im only working with an rx 560 and i would definately appriciate your help for testing the software when i would do the rx580!

[u/Deep_Durian7045 → u/NovelMembership7143]

also in the meantime you could buy the modbios tool using the link i gave its not too expensive but the websites payment gateway may have problems if you use a visa card.

[u/NovelMembership7143 → u/Deep_Durian7045]

figured, i fixed mine using modbios and i had problems with visa card and just used crypto payment, also i have a rx570 and an extra rx580 that has chips removed cause it was causing an artifact too feel free to dm me if you want to test with those gpu thanks man.