The Intel 750 SSD is primarily a data center SSD solution and is optimized as such. It's not at all an SSD that's meant for us mere mortals to be using in our desktop machines, it's an SSD meant to be shoved into a server in a data center and left alone.
Yes, you should return that Intel 750 and get the Samsung 950 Pro or even the cheaper 850 Pro. Unless you know for darn sure that you are going to be saturating a SATA 6 data channel, the Samsung 850 Pro and EVO will be more than most people will be needing for a long time to come.
For a vast majority of people, NVMe is a solution looking for a problem. Unless you're going to be pushing high bandwidth applications like real-time audio and video encoding, high performance database and/or file servers, and other various applications that will need extremely high performance data transfer speeds, SATA 6 will be more than enough for most people's needs for years to come.
Edited by trparky - 10/26/15 at 1:12pm