Intel Motherboards : Can't Detect 960 EVO SSD on H270M-Pro4

It's really unfortunate I can't get this working. I originally suspected an issue with the SSD, and sent it back to the retailer for RMA. However, they returned it to me saying it is fully functional.

I currently have Win 10 Education installed on a HDD. However, when I followed Xaltar's instructions to clear CMOS, I ensured that the drive was disconnected from the board. Could installing Windows on the HDD have affected the SSD in any way?

Thanks

~ xiexingwu