MSI Z490 Gaming Plus - Latest Bios Feb 2021 - Resizable Bar not working (RESOLVED)

centaurius

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Joined
Mar 30, 2021
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2
Hello,

I have a MSI Z490 Gaming Plus with latest BIOS available ( 7C75vA6 - 2021-02-04 ) which gives option to enable Resizable Bar support. I have ENABLED in BIos those 2 options for it:

"Settings > Advanced > PCI Subsystem Settings", enable "Re-size BAR" and "Above 4G memory/Crypto Currency mining", press "F10", to save the settings and reboot.

In Windows 10 it stats Resizable Bar is DISABLED. I have UEFI bios (with CSM disabled). I have retested disbaling and enabling this once and again still with enable or disable Windows always stats Resizable BAR is not enabled (checked via GPUZ / NVIDIA control panel /device manager ).

Anyone has the same problem or any suggestion to enable this?

Thanks and best regards
 
Last edited:

Tikerz

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Sep 22, 2011
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I'm having the same issue with my x570 Godlike. Flashed BIOS on my EVGA card, Re-size BAR enabled in BIOS, UEFI bios. Can't get the GPU to enable Resizable BAR.
 

centaurius

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Mar 30, 2021
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I was able to resolve this issue by upgrading the vBIOS (video bios) of my GPU (rtx 3070), read below for details:

After reading this from NVIDIA site:
https://www.nvidia.com/en-us/geforce/news/geforce-rtx-30-series-resizable-bar-support/
"5. If you have a GeForce RTX 3060, you’re good to go. If you have a GeForce RTX 3060 Ti, 3070, 3080, or 3090, then you may require an updated VBIOS"

And then the detail of their tool to upgrade the vBIOS and each partner tool:
https://nvidia.custhelp.com/app/answers/detail/a_id/5165

Since I also have a MSI GPU I used MSI dragon center (RUN in Administrator Mode), latest version Dragon Center_2.0.106.0 launched today 30-03-2021, which had a VGA BIOS version (under live update advanced scan) and followed instructions, just make sure to close ALL PROGRAMS and disable ANTIVIRUS first. The upgrade of vBIOS flashed the screen and took about 30 seconds and after that a final press of key and system reboot and voila: ReSizable Bar enabled now.

However make sure you have all that is needed as stated in NVIDIA first link, and you will only see improvements on their official list of games. I did a benchmark on SOTR before and after Resizable bar enabled and got same FPS since its not supported at this time.

Cheers!
 

rtx3080

New member
Joined
Apr 27, 2021
Messages
1
Hello,

I have a MSI Z490 Gaming Plus with latest BIOS available ( 7C75vA6 - 2021-02-04 ) which gives option to enable Resizable Bar support. I have ENABLED in BIos those 2 options for it:

"Settings > Advanced > PCI Subsystem Settings", enable "Re-size BAR" and "Above 4G memory/Crypto Currency mining", press "F10", to save the settings and reboot.

In Windows 10 it stats Resizable Bar is DISABLED. I have UEFI bios (with CSM disabled). I have retested disbaling and enabling this once and again still with enable or disable Windows always stats Resizable BAR is not enabled (checked via GPUZ / NVIDIA control panel /device manager ).

Anyone has the same problem or any suggestion to enable this?

Thanks and best regards
Hey, I am hoping you could help me how to disable csm? I am in the mobo BIOS and where exactly do I go to disable it.

Thanks for your help
 
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