So I've had a Samsung 830, 256GB in my 2012, 15" MBP for about 6 months now, it's been ok until the last few days. I noticed that after waking the computer from sleep the menu bar at the top was giving me the spinning beach ball when I hovered over it. So I done a disk speed test with black magic and my SSD was getting TERRIBLE read/write speeds, like 150/write and 170/read. After a restart the beach ball problem seems to have went away, but the reads/writes are still not what they used to be at all (see screenshot). I haven't enabled any Trim hacks, nor is the SSD even remotely close to being full, it's about half full. The strange thing is that the write speeds start off at about 350mb/s then drop off to less than 200, the read speeds never get above 200mb/s. (testing with 5gb on black magic) What should I do? This computer is vital for work I do so I can't have any downtime.