ByAdeline Belluz 2019-05-26 1358
PCIe 4.0 (PCI Express Gen 4.0) should already have reached the market, but it has been delayed. It will offer higher performance than the current PCIe 3.0, increasing the number of channels through which the signal passes to double the bandwidth up to 16 Gigatransfers per second. It will also offer lower latency, higher RAS capabilities, improved I/O virtualization, and a smaller physical size of the bus, enabling smaller cards.
Over the past few weeks, motherboard manufacturers have released a steady stream of BIOS/UEFI updates to support the upcoming AMD Ryzen 3000 processors that we will see at Computex. The Gigabyte updates have a special feature and is none other than the activation of PCIe 4.0 on motherboards like the Aorus Gaming Wi-Fi 7 with X470 chipset and other models with the B450 chipset.
Gigabyte has not officially announced PCIe 4.0 compatibility for its 300 and 400 series motherboards, so it is unclear which models will support the new interface or whether there will be limitations. You will also need a processor that supports PCIe 4.0 like the new Ryzen.
AMD will generally enable PCIe 4.0 at the motherboard level on the new 500 series chipset and, as confirmed at CES 2019, will also support it on the 300 and 400 series. AMD will not block the output function; instead, it will be up to motherboard vendors to validate and qualify the fastest standard in their solutions on a case-by-case basis. And that's what Gigabyte has done with this update.
The manufacturers and models of previous boards that will be supported are unknown. And whether it will reach all slots or just the first x16 slot. The good news is that a current owner of an AMD 400 series motherboard will be able to take advantage of PCIe 4.0, as long as he upgrades his processor to one of the new Ryzen.
There is no confirmed date of support for PCIe 4.0 by Intel. Given the tendency of manufacturers to frequently introduce new sockets and new chipsets, support will probably not reach existing motherboards and only new ones. It will be clearer in Computex. We have already updated it.
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