In fact, this feature they have motherboards, and some PCIe SSDs are required, in particular cards capable of handling several SSDs in M.2 format with a PCIe interface and NVMe protocol to deliver infarction transmission speed.
What is PCIe Lane Bifurcation?
In short, if the motherboard has a PCI-Express 4.0 x16 socket (for example), the PCIe Lane Bifurcation is a dual-socket preparation bill, which, instead of behaving like a x16 socket, will behave almost (not physically) with two x8 sockets. This capability is what allows several NVMe SSD cards to make them work as if they are independent devices, since almost every one of them will be present in the same train.
If the motherboard is compatible with PCIe Lane Bifurcation, it should happen manually set to BIOS of the board itself, so we can tell its firmware how that PCI-Express socket should behave.
Of course, it's called «Bifurcation» does not mean that it can only be split into two, because if the socket is X16 it can be split up to forty x4 in appearance, so that we can control and configure the four different physical devices on which the socket is connected.
By the way, even if it's not organized, it usually produces the default factory configuration, too will automatically detect the number of devices connected to the socket Without touching anything.
Why do some NVMe SSDs need this feature?
It is because of how these cards are positioned with several SSDs. Take the case that we have one of these expansion cards that can accommodate 4 SSDs in M.2 format and through the PCIe interface. Of course, each of these SSDs requires a PCIe x4 interface, but if they connect to the x16 socket we have a lot of extra bandwidth that won't be used.
PCIe Lane Bifurcation then lets you use all the bandwidth so that, with one of these cards, we can use four SSDs that support it with a single board socket. It's that simple.
