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The 960 Evo 500GB has read/write speeds of up to 3,200/1,800 MB/s, and can do up to 330k IOPS (only 14k/50k IOPS at queue depth 1, however).The 960 Evo uses Samsung's new Polaris controller, which has five ARM cores compared to the three ARM cores in the 950's UBX controller.What if you already have an SSD but you still want faster storage?If that's what you're after, look no further than the latest NVMe offerings, which come in a variety of formats.The difference in performance won't be noticed in most situations, unless you pepper the drive with sustained random writes, but the 960 Pro also has a higher endurance rating and a 5-year warranty, compared to 3-years on the 960 Evo.The more important question isn't whether the 960 Evo is fast, it's whether you actually need or will benefit from having such a fast SSD.Faster alternatives were needed, but the interface was only part of the problem.The AHCI (Advanced Host Controller Interface) command protocol was designed for much slower media (ie, spinning magnetic disks).
The 960 Evo is moderately expensive for an SSD, but compared to other fast NVMe drives it's easily the best value.
If price per GB is at all a factor in your storage considerations, or if you're interested in an M.2 drive, the Samsung 960 Evo is the drive to get.
If you're in the market for higher capacities and higher performance, Samsung's 960 Pro is even faster and available with up to 2TB.
For older PCs, we recommend sticking with standard SATA SSDs, which we cover in our Best SSD for gaming guide. The old storage paradigm was built on the idea of spinning disks.
When SSDs hit the mainstream consumer market in 2007, they reset our expectations for storage.