hello you all, i've got a imac 27" 2017 5k, i've upgraded the cpu to i7 7700k and need to upgrade ssd, before i've only upgrade to 256go and the speed is only 2,0Ghz, please see pictures of my ssd, i saw apple store has a ssd blade 2to but speed 3,0GB/s, could anyone tell which one ssd...