Lexar NM620 1TB Performance Testing
We are moving towards using larger test sizes on our benchmarks, but on several tests, we also used the smaller default-test sizes. This allows us to see the difference between lighter and heavier workloads.
CrystalDiskMark is used as a basic starting point for benchmarks as it is something commonly run by end-users as a sanity check.
My primary philosophy when reviewing SSDs is to judge them against their own advertising first, and against their market peers second. Starting with CrystalDiskMark, the Lexar NM620 utterly fails on both fronts. Sequential performance of 2284 MB/s and 864 MB/s fall far away from the advertised 3300 MB/s and 3000 MB/s numbers. In the context of the rest of our drives on this graph, the Lexar is dead last for writes and nearly at the bottom for reads.
Moving to the larger CrystalDiskMark test actually helps read performance a bit, though not enough to meet the Lexar’s own advertised speeds. Write performance remains terrible, though at least it manages to beat the very poorly performing Crucial P2 1TB in that regard.
ATTO Disk Benchmark
The ATTO Disk Benchmark has been a staple of drive sequential performance testing for years. ATTO was tested at both 256MB and 8GB file sizes.
Keeping to the trend started by CrystalDiskMark, ATTO again shows the Lexar both unable to perform up to its own advertised spec, as well as diving straight down to the bottom of our performance charts. The performance here is even worse than under CrystalDiskMark.
At least moving to the larger ATTO test has little effect on the Lexar NM620 1TB, and as a result, in relative read speed rankings, the drive manages to move up a couple of notches. On the other hand, sequential write speed is still riding the bottom of our chart by a large margin. ATTO is also commonly used to show best, or near-best case sequential performance so failing to come close to advertised speeds here is a major miss.
Anvil’s Storage Utilities
Anvil’s Storage Utilities is a comprehensive benchmark that gives us a very in-depth look at the performance of drives tested. This benchmark was run with both a 1GB and 8GB test size.
Call me a broken record, but the Lexar NM620 1TB is at the bottom of the chart again. Do not expect it to move far for the rest of the review. Terrible sequential read and write speeds continue to plague the drive, and higher queue depth random performance is not doing the drive any favors either.
The best that can be said about the Lexar NM620 is that its performance did not crater when moving to larger test sets. Read speed remains the lowest on our chart, but write speed manages to notch a win versus the Crucial P2.
AS SSD Benchmark
AS SSD Benchmark is another good benchmark for testing SSDs. We run all three tests for our series. Like other utilities, it was run with both the default 1GB as well as a larger 10GB test set.
The Lexar NM620 is at the bottom of our chart again. Poor sequential and random performance, both on read and writes, are responsible for the low scores.
On the larger AS SSD test, write speed manages to again beat the Crucial P2, but only barely. Read speed continues to search for the bottom of the graph.
SPECworkstation, direct comparisons, thermals, and our conclusion are up next.