A note regarding the new Resizable BAR information.
This is available for all PCI Express devices (not only GPUs) in the main window - Bus under each device node:
This feature supports individual settings for multiple BARs (Base Address Registers). For AMD BAR0, for NVIDIA BAR1 is of most interest as for GPUs this is the framebuffer memory space that will see a performance improvement when this feature is enabled and properly handled.
The first item (Supported Size) specifies the device capability and is independent from BIOS or drivers. Each device can support different sizes.
The second item (Current Size) specifies the actual setting. This depends on whether the BIOS is supporting this feature and enables it.
On the above GPU example, the 8 GB (maximum) current size means this feature is enabled as it extends the BAR size from legacy 256 MB to 8 GB. When the BIOS doesn't support or enable this feature, the current size would be 256 MB.
This information is also shown for each GPU with a simplified format (BAR0 only):
This shows whether the capability is supported by device and actual state set by BIOS (>256MB is treated as supported).
