I'm pretty happy with my 950 PRO NVME. It hits 2.5GB/s read (256KB), 1.5GB/s write (128KB) in ATTO. Random (IOPS) are 276k read, 95k write as reported by Samsun

I'm pretty happy with my 950 PRO NVME. It hits 2.5GB/s read (256KB), 1.5GB/s write (128KB) in ATTO. Random (IOPS) are 276k read, 95k write as reported by Samsung Magician. And these numbers are all with a fairly full drive. My biggest issue is that it's only a 512, the biggest available at time of purchase (mid 2016; I only replace my systems every 5-6 years or so; 6850k/32gb mem was my limit then). Also, doing benchmarking stresses loads up the thermals and when it hits 70c after a little while perf is throttled down somewhat; this doesn't happen in normal use, but nevertheless I've ordered a NVME heatsink which I hope will be good for it. I see the Optane is a PCIE solution. Seeing as my m2 slot is filled, and noone makes u2 drives (the only other spare slot for such things my motherboard has), that'd make it the perfect upgrade extension for myself if I can fit it in between the GPU and SB card - hopefully it'll come down in price a bit over time.