As part of today’s GeForce Game Ready 465.89 WHQL driver release, NVIDIA has enabled its performance-boosting PCI Express interface technology, Resizable BAR, for GeForce RTX 30 Series graphics cards. While users will require the proper VBIOS/motherboard SBIOS updates and a compatible CPU/motherboard to take advantage of the feature, NVIDIA’s benchmarks show that Resizable BAR is capable of improving performance in select titles such as Codemasters’ F1 2020 by as much as 11.9 percent. Green team admitted that some games actually perform worse with Resizable BAR enabled, however.
In practice, the performance benefits of Resizable BAR can vary substantially from game to game. In our testing, we’ve found some titles benefit from a few percent, up to 12%. However, there are also titles that see a decrease in performance, so NVIDIA will be pre-testing titles and using game profiles to enable Resizable BAR only when it has a positive performance impact. That way you won’t have to worry about bugs or performance decreases, and won’t have to rely on the community to benchmark each title and discover whether Resizable BAR is beneficial in the games you’re playing.
Source: NVIDIA