@FuBaNaToR .....little more help for you.....i have used more then a few of the new M.2 drives as i build computers on the side to the tune of doing a 98 complete computers this year alone!!!....yes in the last 7 months i have built that many....
this is a great place to start as it has a heat sink that really works and only cost 50 bucks....only problem is its only 256gb so you will only get 2 to 5 games on it with OS depending on game sizes....this will give you 3200mb read speeds and up to 2100 write speeds claimed (i saw 3100ish read speeds and 1900 to 2000 write speeds with a ryzen 2600 CPU)
https://www.newegg.com/plextor-m9pe-256gb/p/N82E16820249109
this samsung is a little faster and is double the size at 512gb BUT its 3 times the price at 150 ON SALE!!! so may not be a option but i can tell you like sammy SSD drives so i am putting in the list to look at it.....read speed is 3500mb and write speeds on this 1 are 2700mb A SECOND!!!!!
https://www.newegg.com/samsung-970-pro-512gb/p/N82E16820147693
budget option with a ton of space and 3 1/2 times the speed of sata based would be this one....a 1tb drive is only a 100 bucks BUT it only reads at 2000mb and writes at 1700mb....a 500gb at these speeds will only set you back 60 bucks.....these are the great value for dollar option to get way faster then SATA based SSD drives but they are not even close to being the fastest on the market.....(i like these for budget builds and even used them for faster storage on editing rigs as they beat the snot out of 2 15,000 RPM harddrives in raid)
https://www.newegg.com/crucial-p1-500gb/p/N82E16820156200
i have used ALL of these drives on builds i have done in the last 3 months so i am current in understanding their speeds....ALL of these drives ^^^^^ have a 5 year warranty on top of it.....you cant really go wrong with any of them, its just how much do you want to spend and what size would you like the drives to be....FYI in loading BF4 the Plextor will load full maps in about 8 seconds and in fallout 4 i cant even get the textures to load for the pictures in the loading screen before it drops me in game....the samsung will be FASTER but costs a ton were as the Crucial will load a little slower but take a shit ton more games as you have more space for your money.....
food for thought....let me know if you need help or just want to bounce ideas off me.....
oh and FYI the FASTEST SATA based SSD drive is only reading at 550mb in the BEST of conditions.....so even the slowest Crucial is still at least 3 to 4 times faster, with the faster samsung being 7 times faster!!!!