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(MSI G66 Stealth 3080 laptop 95 -> 155W TDP VBIOS Flash 20% perf boost) DisplayPort over Alt Mode stopped working. Share a VBIOS rom please?

zorrobyte

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Howdy!

I flashed a 155W TDP VBOIS on my MSI G66 Stealth 3080 16GB and ever since, Displayport over Thunderbolt 3 "DisplayPort over Alt Mode" has stopped working.

I've tried multiple USB to Displayport dongles, multiple cables, and multiple monitors. It just doesn't work, even after a clean reinstall of Windows 10. I've also tried flashing the original VBIOS with no luck.

I'm loving the performance, I'm getting 20%+ higher framerates and after a repaste, the tempatures of the CPU and GPU are very nice. There's no doubt in my mind that this laptop can handle the 155W TDP, even the power delivery and MOSFETs are actively cooled by the heatsink. The adapter is 230W and GPUz is showing that I'm being limited by "pwr" which I'm assuming is the power brick, or power delivery.

However, I'm stuck at 60hz refresh on my ultrawide now with an HDMI cable. MSI doesn't offer another 3070/3080 laptop with Thunderbolt 3 with DisplayPort over Alt Mode, but I would be happy to try a VBOIS from a 3080 that does.

Sadly, my original VBIOS backup got deleted after updating the BIOS, the RAID array gets corrupted and a clean reinstall is required if using a NVME RAID 0 array every single time. Could someone share a backup of their G66 3080 VBOIS, or maybe I'm missing something? I would have thought that the factory VBIOS from MSI's website would have fixed it.
 
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System Name Whonock
Processor Amd 3200g
Motherboard A320m-h
Cooling Wraith Stealth
Memory 2x 8g ddr4 2666mz
Video Card(s) Msi Gaming x 1060 6g
Storage 5.5 tb hd 220 g ssd
Display(s) Normal moniter
Case Deepcool smater
Does ut gave a bios switch?
 
Joined
Sep 2, 2020
Messages
853 (2.91/day)
System Name Whonock
Processor Amd 3200g
Motherboard A320m-h
Cooling Wraith Stealth
Memory 2x 8g ddr4 2666mz
Video Card(s) Msi Gaming x 1060 6g
Storage 5.5 tb hd 220 g ssd
Display(s) Normal moniter
Case Deepcool smater
I don't understand. No, the laptop doesn't have a BIOS switch that I'm aware of.
i was unaware it was a laptop thought it was prebuilt
 

tjflash

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May 7, 2021
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howdy sir! I think we can help each other out! although I don't have a 155w bios I do have a working gs66 bios and it has a working display port. On another note do you mind linking or telling me where you got a working 155w bios. I would love to try it out!
 
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zorrobyte

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May 6, 2021
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howdy sir! I think we can help each other out! although I don't have a 155w bios I do have a working gs66 bios and it has a working display port. On another note do you mind linking or telling me where you got a working 155w bios. I would love to try it out!
Perfect!

First off you’ll need a patched version of NVFlash.

This overrides the pci mismatch.
Second, you can flash any MSI vbios with a 3080 https://www.notebookcheck.net/Compr...U-along-with-corresponding-TGPs.517977.0.html

I’m using this one: https://www.notebookcheck.net/MSI-GE76-Dragon-Tiamat-10UH.534384.0.html

Your turn could you share a vbios backup from GPU-Z?
 

zorrobyte

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May 6, 2021
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hey bud I guess i need your permission to access the file but I got you covered. here is the link to the rom file! https://drive.google.com/drive/folders/1GzrV65DD-Yqi2V1s6Ixn1dbgM4ESeXNt?usp=sharing also if you ever lose your file I think msi has access to them on their support page.
Thanks!

For whatever reason even with the Vbios on their website and flashed stock, the DisplayPort over thunderbolt no longer works. Just keep this in mind before you experiment if that’s important to you. I’d love to hear of your results!
 
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