Incorrect indication about ReBAR in newest version of GPU-Z.

[michalj82]

I have GTX 1660 Super and after the update to newest version of GPU-Z it shows in Advanced section that my GPU supports ReBAR while it doesn't, obviously. I guess it's just a matter of correcting a typo in GPU-Z code.

 

[W1zzard]

Thanks for reporting. This is definitely a bug, will fix asap

 

[R-T-B]

Reminds me of a similar bug I reported earlier on my thinkpad egpu setup.

 

[W1zzard]

[GPU-Z Test Build] Resizable BAR shows as "Yes" when Supported but Disabled

Please test and feedback

www.techpowerup.com

Please test

 

[:D:D]

@michalj82 Your GPU does have resizable capability, just that it's limited to 64MiB, 128MiB and 256MiB sizes without user intervention.

 

[michalj82]

@michalj82 Your GPU does have resizable capability, just that it's limited to 64MiB, 128MiB and 256MiB sizes without user intervention.

No it isn't. In any previous version of GPU-Z it says that there's no GPU Hardware support and there's no option to enable ReBAR in BIOS with newest BIOS for motherboard and graphic card.

 

[:D:D]

@michalj82 See HWiNFO for clarification.

See GPU-Z version history / release notes.

For reason

 

[michalj82]

If it's supported then why I can't enable it in BIOS?

 

[Solaris17]

If it's supported then why I can't enable it in BIOS?

They are not one and the same. Both the mobo and the GPU must support rebar.

 

[michalj82]

NVM I guess my Ryzen 5 2600 is the issue here.

 

[:D:D]

CPU isn't an issue but your GPU architecture is a special case requiring straps to be set (can be done by register on GPU) for using more than 256MiB as well as needing to set the size using Resizable BAR capability register which is also on the GPU card. Usually if using more than 1GiB size then addressing below 4GiB will not work.

 

[W1zzard]

For Turing there's a community project that enables Resizable BAR for actually meaningful BAR sizes (i.e. bigger than 256 MB).

while technically "Resizable BAR" means "resizable", for 99% of users it actually means "BAR size == VRAM size == performance improvement"

GPU-Z showing "Yes" is a bug. "Yes" is not even a designed output for the value, there's a coding bug that the beta build is supposed to fix

 

[DarkDreams]

[GPU-Z Test Build] Resizable BAR shows as "Yes" when Supported but Disabled

Please test and feedback

www.techpowerup.com

Please test

Since I also have a 1660 Super I tested the new build:
While Resizable Bar says "Disabled" now, GPU hardware support is still saying "Yes". That should not be the case, right?

 

[W1zzard]

GPU hardware support is still saying "Yes".

The Turing GPU supports Resizable BAR: https://www.techpowerup.com/320175/...sizable-bar-support-through-nvstrapsrebar-mod