sigh,......the sm951 IS A PCI-E x4 SSD
please take the time to read the specs on a item before commenting
https://www.amazon.com/SAMSUNG-SM951-MZHPV256HDGL-256GB-Internal/dp/B00VELDBJ6
- M.2 Interface: PCIe 3.0 x4 lanes, up to 32Gb/s
- Sequential Read: 2150MB/s, Sequential Write: 1500 MB/s, Random Read (QD=4): 90K IOPS, Random Write (QD=4): 70K IOPS
- 512MB LPDDR2 DRAM Buffer Memory
- Works with most motherboards and notebooks with a compatible M.2 PCIe interface slot
- Supports Standard AHCI driver, APM and L1.2 Power Saving Mode, End-to-End Data Protection, Supports TRIM Command, RoHS Compliant, Halogen-Free Compliant