I own an Intel 600p and it runs nicely, but reviews say that it is the slowest of the NVMe SSDs. I've seen good speed info for the OCZ RD400, but don't recall any reviews on it. Everyone knows that Samsung makes great SSDs and the 950 PRO is no exception, so if you can afford it, I would totally go with the Samsung. If you can find and afford the 960 PRO or the 960 EVO, they are supposed to be even better/faster than the 950 PRO.