The NVIDIA RTX 3060 is the first gaming desktop graphics card with resizable BAR support, and many laptops with NVIDIA RTX 30 laptop GPUs also support resizable BAR. Even AMD’s Radeon RX 6000 series supports this technology. It would be okay only if NVIDIA’s professional-grade cards support scalable BAR and, with recent discoveries, the RTX A6000 scalable BAR support. Redditor ‘millenia3d’ discovered this feature.
The resizable BAR is available in vBIOS stock for NVIDIA RTX A6000 and will be available for the RTX 30 series in March
In short, the resizable BAR removes the strong restriction on the amount of data that can flow between the CPU and the GPU memory and can sometimes allow for substantial performance increases. The resizable BAR grew in popularity and recognition when AMD implemented smart access memory when you paired a 5000 Ryzen series CPU and a 500 series chipset with an RX 6000 series GPU. The biggest difference here between the implementation of AMDs and NVIDIA is that NVIDIA’s support for ReBAR (scalable BAR) is that it is compatible with many other platforms.
The RTX A6000 is the only Ampere board with a full GA102 GPU with 10752 CUDA cores. The amount of memory on this card exceeds any other card in the RTX 30 series with 48 GB of GDDR6 memory. The reason we don’t see GDDR6X memory is that it is not available in such capacities. The scalable BAR technology will be great for this amount of memory and is available with the standard vBIOS. As for the rest of the RTX 30 series cards, the wait for the resizable BAR is short with compatible vBIOSes made by NVIDIA. NVIDIA and its partners are expected to launch a compatible vBIOS for FE and custom boards in March.
The NVIDIA RTX A6000 is a card that is definitely not for everyone and the price represents that. The A6000 is priced at $ 4,650, which is 3 times the MSRP of the ultra-enthusiastic level board in the GeForce line: the RTX 3090.