I've been struggling for a week to enable Resizable BAR (ReBAR) on my RTX 3070. I've already disabled Compatibility Support Module (CSM), enabled Above 4G encoding, updated my motherboard BIOS to the latest version, and made sure all drivers are up to date. I've done everything I could find, yet it still shows as disabled in both GPU Z and the Nvidia app. Any help would be appreciated!
2 Answers
Resizable BAR isn't actually a feature of the GPU; it's dependent on your motherboard and CPU. What motherboard and processor are you using?
Make sure you actually enable Re-size Bar Support in your BIOS settings. After my last BIOS update, I got a prompt to disable CSM and reboot to switch to UEFI. Once I did that, I found I could enable both Above 4G encoding and Re-size Bar Support without issues. It might help to check if your motherboard has a similar requirement after updates!
I did enable that setting too, but it still shows up as 'Disabled' in GPU Z.
Sorry for the confusion! I'm using a Ryzen 5 5500 with an MSI B550M Pro VDH.