Random Write Steady State
With random 4KB steady state writes, we're looking at two things. The obvious first observation is IOPS performance, where a higher number is better. The second variable is how closely bound the minimum and maximum IOPS are in relation to one another. This is what we call performance consistency.
The two 256GB SM951s deliver higher peak random write steady state IOPS than the 850 Pro, but the deviation between low and high marks is larger. Some enterprise products will actually limit random write IOPS in order to deliver a more consistent flow of data for applications that rely on steady performance over peak performance.
If it only resulted in an extra 10% on a real-world test, then it wouldn't make any sense to spend double or more on a NVMe drive. With these solid numbers, though, the massive performance leap will be well worth the cost for those who can afford it.
I wish you guys would of compared this NVMe SSD to the Intel NVMe SSD that just came out.
All three drives were tested in the PCIe test system. They are the only systems setup for testing queue depths beyond 32.