whats the difference between PCIEX16 & PCIEX4??

Should NVMe drives be plugged into PCIe x16 slot for full readwrite pciex16 slot Maybe you have a hair or something else blocking a contact in your PCIe slot Or a bent socket pin Or a defective motherboard Or a defective pciex16 slot EZ-Latch：PCIe x16 Slot with Quick Release Design; Fast Networks： LAN & Wi-Fi 6E ; Extended Connectivity：DP, HDMI, Rear USB-C® 10Gbs, Front

phantom of the opera slot Yes, a x1 card should work in a x16 slot It's good that you've got it to work in a x1 slot What else have you tried it in besides the x16 slot