asus begynder at aktivere begrænset pcie gen 4.0 på amd 400-serien chipset bundkort - Asus

ASUS begynder at aktivere begrænset PCIe Gen 4.0 på AMD 400-serien chipset bundkort

ASUS believes that PCI-Express gen 4.0 support on older socket AM4 motherboards based on the AMD 400-series chipset is technically possible, even if discouraged by AMD. The company's latest series of motherboard BIOS updates that expose PCIe Gen 4 toggle in the PCIe settings, does in fact enable PCIe gen 4.0 to all devices that are directly wired to the SoC. These would be the PCI-Express x16 slots meant for graphics, and one of the M.2 slots that has PCIe x4 wiring to the SoC. Below is a list of motherboards scored by Chinese tech publication MyDrivers, which details the extent of PCIe gen 4.0 support across a number of ASUS motherboards based on the X470 and B450 chipsets.

AMD blokerede tilsyneladende ikke eksplicit PCIe gen 4.0 for ældre chipsæt. Det foreslog blot til bundkortproducenterne at ikke aktivere det, da de nyere AMD 500-serien bundkort er bygget til nye PCB-specifikationer, der sikrer PCIe gen 4.0 signalintegritet og stabilitet. ASUS ønsker at overlade det til brugerne at beslutte, om de vil have gen 4.0. Hvis deres maskiner er ustabile, kan de vælge at begrænse PCIe-version til gen 3.0 i deres BIOS-indstillinger. AMD's specifikationer for 500-serie chipset bundkort foreskriver PCB'er med mere end 4 lag til optimal PCIe og hukommelsesforbindelse. Mange af bundkortene på ASUS 'liste, såsom TUF B450 Pro Gaming, bruger enkle 4-lags PCB'er.

To test that PCIe gen 4.0 is actually enabled, MyDrivers used a PCIe gen 4.0 SSD on the M.2 slot that's directly wired to the SoC, on a TUF B450M Pro Gaming. Crystal DiskMark sequential read speeds of the drive are consistent with the same drive tested on an X570 motherboard - with just over 5 GB/s reads. These speeds are impossible on gen 3.0 x4. In a separate article, MyDrivers reports that AMD isn't too happy with ASUS marketing PCIe gen 4.0 support on its 400-series motherboards, and is reportedly trying to block it in updates to the AGESA microcode. Our recommendation - if your updated ASUS 400-series motherboard is running PCIe gen 4.0, don't update its BIOS. Sources: MyDrivers (main story), MyDrivers (AMD's response)