AMD SMART ACCESS MEMORY

Sapphire Toxic Radeon RX 6900 XT

Combine an AMD Ryzen 5000 Series processor or a select AMD Ryzen 3000 Series processor with an AMD Radeon RX 6000 Series graphics card to boost your system’s performance, thanks to AMD Smart Access Memory technology. AMD Smart Access Memory enables AMD Ryzen processors to harness the full potential of the graphics card memory. Enjoy increased performance with all-AMD in your system for the ultimate gaming advantage.

Resizable BAR is an optional PCI Express interface technology. The PCI SIG first documented the ability with PCIe 3.0 which is now almost a decade old. The motivation was to deal with memory management issues with 64-bit operating systems which can handle much larger amounts of RAM.

Earlier NVIDIA introduced their resizable bar. Essentially AMD’s Smart Access Memory and the NVIDIA resizable bar are the same thing. It a long time coming tht AMD and NVIDIA started supporting 64-bit systems and the full PCIe 3.0 standard. Windows 11 is 64-bit only.

As you move through a world in a game, GPU memory (VRAM) constantly transfers textures, shaders and geometry via many small CPU to GPU transfers. The DMA/MMU/IOMMU handle the transfer relieving the CPU for other tasks. Fully memory mapped VRAM would allow direct access to load game assets and code for execution directly.

In conventional Windows-based PC systems, processors can only access a fraction of graphics memory (VRAM) at once, limiting system performance. With AMD Smart Access Memory, the data channel gets expanded to harness the full potential of GPU memory, utilizing the bandwidth of PCI Express to remove the bottlenecks and increase performance.

msi x570-a pro pci subsystems

Most AMD AM4 motherboards have a BIOS update to enable the Resize Bar and above 4G decoding which is suitable for 64-bit systems. The MSI X570 is typical for single video card slot the x16 lanes is best. The resize bar support and above 4GB memory were added with BIOS update back in January in line with the NVIDIA announcement but AMD announced their solution with COMDEX.

AMD’s Radeon RX 6000 will also support the DirectStorage API, which reduces game load times, and it’s possible that explosive latency-reducing storage tech could benefit from the Smart Memory Access feature, too, giving AMD yet another advantage. But we’ll have to wait to learn more details.

Keep in mind AMD, Intel, and NVIDIA are working hard to bring versions of all these features to PC gamers no matter the mix of hardware they’re using, and the near future may look wildly different in terms of what GPUs and CPUs can and cannot do together. PC gamers are a motley crew at the best of time with a staggering range of components. Hardware designs have changed many times making it even more complicated.

The low cost R5 3600 is a basic 6 core 12 thread CPU and it is suitable for Smart Access Memory. The AMD B350, X470, B550 and X570 widely have a BIOS update to enable Smart Access Memory.