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NVIDIA GeForce RTX 3090 Ti vs. AMD Radeon RX 6950 XT – AMD Smart Access Memory Performance vs. Resizable BAR

NVIDIA GeForce RTX 3090 Ti vs. AMD Radeon RX 6950 XT - AMD Smart Access Memory Performance vs. Resizable BAR

New generations of graphics cards are fast approaching, but before changing the guard, I decided to put together the current flagship again. Most importantly – the final duel of the NVIDIA GeForce RTX 3090 Ti and AMD Radeon RX 6950 XT will also include an additional variant. Both cards will be checked for usability of AMD Smart Access Memory and Resizable BAR technologies, which are essentially identical in functionality. However, the question is which application will bring the greatest benefits? Is it really possible to significantly improve performance by rearranging a single option in the motherboard’s UEFI? This will be verified by a dozen or so games…

Author: Sebastian Oktaba

AMD Smart Access Memory And the sized bar Promoted by NVIDIA, however, it’s not among the latest technologies that have been introduced to current generations of graphics cards. The mechanism they use is a publicly available part of the PCI-Express standard, but it was only recently implemented. The first initiative came from AMD, adding support to the Radeon RX 6000 family, then NVIDIA joined in with the launch of the GeForce RTX 3060 (older cards require a BIOS update). The operating principle of AMD Smart Access Memory and Resizable BAR is identical, so in theory the differences in performance should be marginal. The technology itself revolves around the possibility of expanding the base address register, where instead of the current 256MB blocks, the central processor gets the full capacity of VRAM. This would significantly reduce or completely eliminate the bottleneck when transferring data between components, because the processor coordinates the work of the graphics system.

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NVIDIA GeForce RTX 3090 Ti vs. AMD Radeon RX 6950 XT – AMD Smart Access Memory Performance vs. Resizable BAR on Flagship

NVIDIA GeForce RTX 3090 Ti vs. AMD Radeon RX 6950 XT - AMD Smart Access Memory Performance vs. Resizable BAR [nc1]

Hardware Acceleration in Video Processing and Display Software – NVIDIA GeForce and AMD Radeon Graphics Performance Test

Official hardware requirements for AMD Smart Access Memory and NVIDIA Resizable BAR technology differ slightly from reality. Manufacturers on websites indicate that the latest generations of graphics cards are compatible, which is, of course, an excuse to increase their sales. However, in practice, it all depends on what platform and BIOS is loaded, because many motherboard manufacturers have released updates for old chipsets. Officially, AMD Smart Access Memory requires AMD Ryzen 3000/5000 family processors (except 3000G), AMD 500 chipset and Radeon RX 6000 chipsets, but it also works on AMD B450 chipsets as well as the Radeon RX 570. NVIDIA refers to the AMD Ryzen 5000 processor. with a set of chipsets. AMD 400/500, 10/11/12 Intel Core processors with Z490/H470/B460/H410 chipsets or equivalent.

AMD Smart Access Memory sized bar
Supported Systems Radeon RX 6000 GeForce RTX 3000
AMD processor required Ryzen 3000/5000 Ryzen 5000
AMD chipsets required 400/500 400/500
Intel processor required Core 10/11/12 years
Intel chips are required 400/500/600

AMD Smart Access Memory turned out to be a fundamentally closed standard, intended only for the AMD platform, but after activation it should work in each address. Turns out NVIDIA’s Resizable BAR to make a change would be more expensive, but it would only be active in select PC games (depending on the driver). The reason is the precautions of greens, because not every implementation leads to increased efficiency, but in extreme cases it can cause destabilization. Of course, the Resizable BAR can be played manually in almost any production by editing the profiles. For comparison purposes, I chose the leader in the offerings of both manufacturers – ASUS TUF GeForce RTX 3090 Ti Gaming Card OC And the Sapphire Radeon RX 6950 XT Nitro Pure. This will allow you to highlight the differences in the implementation of AMD Smart Access Memory and Resizable BAR as closely as possible.

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