in the last month，This site reported that Scott Herkelman, vice president of AMD and Radeon business group, said，Enable NVIDIA graphics card to use SAM，At the same time, it also proposed to open SAM technology to Intelwill。Now，Some motherboards using Intel platform can already use SAM technology。
With AMD Radeon RX 6000 Smart Access Memory (SAM for short) technology launched together with a series of graphics cards，Allows the CPU to directly access all display memory，To improve computing performance，brighten the eyes of the outside world。Interestingly，SAM is not limited to AMD CPUs or motherboard chipsets。
strictly speaking，The technical principle of SAM is the implementation of the Resizable BAR function in the PCIe specification，It's just that AMD put the name of SAM on it to promote marketing。AMD followed by Zen 3 Microarchitecture Ryzen 5000 series processors start，Support Resizable BAR at the hardware level。Interestingly, Intel from 2014 Haswell microarchitecture since，has been included in the relevant support，ahead of the opponent 6 year。
in other words，Start SAM on Intel platforms，In fact it is perfectly feasible。therefore，ASUS has recently targeted several Z490、H470、B460 Motherboard，Provides optional Resizable BAR feature BIOS update，If enabled with Radeon RX 6000 graphics card，The performance gain brought by SAM technology can also be obtained。also，MSI also announced that it will release updates for its console version in the future，Allow consumers to freely choose the Resizable BAR function。
As for whether SAM (Resizable BAR) is PCIe 4.0 Exclusive? NVIDIA has already given a negative answer to this point，Even if a graphics card that supports SAM is installed in the PCIe 3.0 slot，Computing performance can also be improved。
In addition, NVIDIA also stated that，They will launch a solution using Resizable BAR technology in the future，Like AMD's SAM。NVIDIA highlights，Existing GeForce RTX 30，That is to say, the Ampere series products are ready for support in terms of hardware.，Only need to update the driver in the future，to enable this feature。
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