It is about even with my NVMe in loading times using an old 845DC
My 512GB Samsung 950 PRO NVMe blows the windows clean off of my 850 Samsung Pro of the same size (I have several Samsung 840-850 series SSD's), regardless of what I do, on Windows 10 Pro or Linux Mint 17.1. RAPID is disabled for that model, it's not needed, as the near 2,600MB/sec & 1,500+MB/sec writes are
real &
not enhanced by software gimmicks. Yet some fools still believes that their Samsung 250GB EVO with RAPID enabled is still faster than a true NVMe SSD (& not the SATA-3 ones). NVMe SSD's are still kind of new to Windows users & market share is growing, for Linux users, these has out out of the box support since 2012, around the time of two OS's that are approaching EOL (Linux Mint 13 & Ubuntu 12.04 LTS).
Whether gaming, general usage, home office or even a server or heavy Workstation use (some of these applies to the 850 Pro also), the EVO's or anything with RAPID is chicken change when compared to a true NVMe SSD. The 960 PRO takes things to another level, which not only kicked the 256GB model to the curb, Samsung also began offering an EVO SSD for these drives, and these doesn't include (nor need) RAPID.
I'll be honest here, the only difference that I could actually feel with RAPID, was on SATA-2 hardware, where these drives gave the system(s) a much needed boost, yet there's some computers that'll still run kind of buggy with the software, including the one I'm now on. The Optiplex 780 is no pushover, runs Windows 10 like a champ, on a CPU predated the 'i' series, and the best of the business/consumer editions of the Intel Core 2 Quad. Of course there were/are still enthusiast editions that uses a lot more power (130W), way too much for this DT edition of the Optiplex 780 series (mid-choice). Even has a 1GB GDDR5 (UEFI approved) GPU that was transplanted from my XPS 8700, which has been gutted of it's CPU for a 2nd build, where the 512GB Samsung 850 Pro resides. I purchased this PC, which included the Q9650 & Windows 7 Pro (now W10 Pro) for just a bit more than the CPU alone sells for on eBay if from an original owner.
http://speccy.piriform.com/results/Z7HZTfUBSYlX2VexNcECoYx
Yet the specs to my sweetness, all built my my two hands & some specs won't be shown, such as the Fractal Design R5, EVGA Supernova G2 650, Noctua NH-D15 & more is in the below link, where my Samsung 950 PRO is installed. It's going to be later moved to a Intel 6 core build to have more PCIe lanes, plus nearly 2x the L3 cache of the CPU, or may simply purchase a 500GB 960 PRO, depending on funding.
http://speccy.piriform.com/results/gVBJx7ivpIeeuq7ZKUzXZEJ
Have fun gaming with RAPID!
Cat