Nvidia has started rolling out support for Resizable BAR, a feature of PCI Express that can increase the frame rate in certain games by up to 10 percent. The new RTX 3060 graphics card is the first to include Resizable BAR, which gives certain CPUs access to the entire graphics frame buffer, instead of being limited to reading only 256 MB of blocks. Support for other 30-series GPUs will be available in late March.
You need the right CPU, motherboard and graphics card to use this new feature, and Nvidia is working with both AMD and Intel to provide chipset support. AMD’s Zen 3 processors are supported, along with Intel̵
Like AMD’s Smart Access Memory, Resizable BAR on Nvidia GPUs can increase the frame rate in certain games by up to 10 percent. The boost is really game dependent, and the resolution can also affect how much performance will increase. “In our tests, we have found that some titles benefit from a few percent, up to 10 percent,” says Nvidia. “However, there are also titles that see a reduction in performance.”
Nvidia tested titles and uses special game profiles to activate Resizable BAR only where performance increases. The following games are currently supported:
- Assassin’s Creed Valhalla
- Battlefield V
- Borderlands 3
- Forza Horizon 4
- Gir 5
- Metro Exodus
- Red Dead Redemption 2
- Watch Dogs: Legion
Additional games will be supported at the end of March, when Nvidia launches VIOS updates for the rest of the 30-series GPUs. Nvidia will provide VBIOS updates for all Founders Edition cards in the 30 Series, and tablet partners will also release their own updates. You also need a motherboard update that includes the necessary CPU support, and Nvidia says Asus, Asrock, Colorful, Evga, Gigabyte and MSI have all started supporting Resizable BAR on select motherboards.
Resizable BAR support on the AMD side has been tested a lot, and TechSpot found that some games that use Smart Access Memory could see almost 20 percent boost at 1440p and 4K.