[SOLVED] Seeing no performance boosts with ReBAR enabled. why?

[orion_o]

So i recently upgraded my cpu from a ryzen 5 2600x to a ryzen 9 5900x, and i wanted to take advantage of the Resizeable-BAR support. After updating the bios i did see this option and toggled it from 'disabled' to 'auto'.
Checked a few games and did comparisons between with and without rebar enabled, and i literally saw no performance boosts at all.
To be clear, the game that is most positively effected by rebar is probably Forza Horizon 5, and i gained literally nothing in both 1080p and 1440p, in both high and ultra settings (4 test results in total).

After googling to make sure i have rebar enabled via windows, im now not knowing what else to check if its properly enabled or not.

I have included images from speccy, the bios options, the device manager, and Radeon Software.

So, what am i missing here? Is there another test (perhaps even synthetic) that can determine if rebar works properly in my machine?


Speccy screenshot #1
Speccy screenshot #2
BIOS settings
GPU properties via device manager
Radeon Software settings

 

[Lutfij]

Try uninstalling (all)your GPU drivers with DDU then manually reinstall with the latest driver sourced from AMD's support site. Are you working with BIOS version F64b?

 

[orion_o]

Ok so update - now it works.
I have DDU'd the driver and installed the latest version - 22.7.1, and here are the new fps results from FH5 benchmarks..

Pre-rebar:

1080p high - 113 FPS
1080p ultra - 79 FPS
1440p high - 99 FPS
1440p ultra - 69 FPS (nice)


With rebar:

1080p high - 140 FPS (x1.24 uplift)
1080p ultra - 95 FPS (x1.2 uplift)
1440p high - 121 FPS (x1.22 uplift)
1440p ultra - 81 FPS (x1.17 uplift)

Overall an avg of 21% fps uplift in Forza Horizon 5!

As for which bios version im using, its the normal F64 version.