4 x 4 slot ✓ 4 Port PCIe SATA III Controller Card

4 x 4 slot x4 means 4 lanes, and x8 means 8 lanes Taking the ADATA LEGEND 960 MAX as an example, this SSD is PCIe Gen4 x4 PCIe devices use lanes to transmit and4 x 4 slot Sonnet 4x4 and McFiver PCIe Cards

4 x 4 slotAdd up to four NVMe SSDs using only one PCIe slot ⦁ Designed for use with 2280 form factor SSDs ⦁ Compatible with PCIe motherboards and backward

4 x 4 slot You can check this by entering BIOS and looking for an option to change slot whatever to x4x4x4x4 mode 4x or even 1x slot That