Review on 💾 Xiwai Low Profile PCI-E 3.0 x1 Lane M.2 NGFF SSD Adapter Card - Boost Nvme AHCI Performance with PCI Express Integration by Chris Walker

This factory/company has no quality control. The "compression nut" is 1mm larger than the hole it fits into. Don't buy it unless you have a Dremel (or other grinding/sanding tool) and have about 30 minutes to fix it. The board itself is solidly built and looks well made. Screen printing/solder mask is ok. The card is pretty much a direct-through converter. I've seen 800Mbps on a saturated PCIe 3.0 1x slot (it shares a bus with another NVME, so that's to be expected). When connected to a PCIe 4.0 16x slot, I saw full speeds.