[Hardware]AMD SAM Coming to AMD 400 Series Chipsets Soon

[SougarLord]

 

The AMD 400 Series chipset will support Smart Access Memory technology

 

Resizable BAR is a technology devised by HP and AMD itself that was proposed in 2008 and that PCI-SIG, standardizer of the PCIe standard accepted for PCIe 3.0 that same year. In all these years it seems that no one had taken it into account. Now there is a rush to integrate this technology, even rename it.
 
AMD indicated that this SAM technology would only be supported by the Ryzen 5000 and RX 6000 Series, all under the AMD 500 Series chipset. Some manufacturers that were skipping this restriction and of course, AMD has had to give its arm to twist. AMD 400 Series chipped motherboards will support Resizable BAR, but only with Ryzen 5000 processors and RX 6000 Series graphics.

 

Its integration in motherboards with AMD X470 and B450 chipset will be possible with the AGESA v2 1.1.0.0 microcode. AMD has already distributed this new firmware and now it will be the motherboard manufacturers who integrate it. It is possible that in weeks we will begin to see the BIOSes that add support for Resizable BAR.

To give us an idea, the Intel Rocket Lake-S and Tiger Lake-U processors will support Resizable BAR. NVIDIA has also indicated support for Resizable BAR on the RTX 30, but we don't know much else.

 

Resizable BAR technology has the ability to deliver a performance improvement of up to 10%. Basically it is achieved because with this technology the processor has access to all the VRAM of the graphics. The processor instead of loading the tasks in RAM and then looking for that data at the request of the GPU, loads it in the VRAM of the graphics. By reducing the latency of the data request, search and submission process, you gain performance.