AMD announces Radeon RX 6800 series GPUs at the same time，also launchedSmart Access Memory (SAM) function，As a technology to increase the available video memory of the CPU。Smart Access Memory is based on AMD's implementation of the Resizable BAR Capability feature in the PCI Express specification.。Originally announced as only available on 500 series motherboards，and when using AMD Ryzen 5000 series CPUs and AMD Radeon RX 6800 series GPUs，Only Smart Access Memory is available，It is an exclusive feature of a 500 series motherboard。
For many AMD users who use 400 series motherboards，Upgrading to a Ryzen 5000 series CPU and Radeon RX 6000 series graphics card without changing the motherboard is a very reasonable option，After all, the motherboard is not in urgent need of replacement.，But it cannot enjoy the Smart Access Memory function of the 3A platform like the users who use the 500 series motherboard.，It's a bit of a nuisance。
Taking into account the needs and rationality of users，As reported by TECHPOWERUP，AMD may decide to expand Smart Access Memory functionality to 400-series motherboards。Recently AMD released the new AGESA v2 1.1.0.0 update，By updating the BIOS，It should be possible to implement Smart Access Memory support on B450 and X470 motherboards。
AMD's use of Smart Access Memory has expanded recently，We have previously reported，When the relevant person in charge of AMD was interviewed by the media, he had already stated that he would cooperate with Intel and NVIDIA，Future Radeon RX 6000 series GPUs will perform the same functions as Intel's latest CPUs and their companion motherboards，In addition, the NVIDIA Gefore series GPU will also introduce the Smart AccessMemory function，For use with Ryzen 5000 series CPUs。
It is still unclear if the support for Smart Access Memory will be implemented on the B450 and X470 motherboards.，Is the actual performance gain comparable to using a 500 series motherboard?。
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