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PCI Express (PCIe) is a high-speed serial computer expansion bus and interconnect standard used to connect devices such as GPUs and SSDs to a host.
… While it's built squarely on PCIe PCIe Gen 5, specifically , CXL offers features that the standard PCI Express bus lacks, such as maintaining memory coherency between the CPU and various attached accelerators. …
SSDs that use the latest PCI Express 5.0 interface are expected to begin appearing sometime in 2022 and beyond . That's good news for fans of fast storage, as they offer double the throughput compared to PCIe 4.0. …
… Image: PCgameshardware.de With those caveats out of the way, the new benchmarks show the wide gulf in transfer speeds between SATA and PCIe drives. None of the GPUs were able to transfer data faster than 2GB/s, whereas the PCIe drives scored between 15 and 16GB/s. …
… It is clarified that you can use PCIe 3.0 drives too, so PCIe 4.0 is not required. …