Performance Tests Continued
AS SSD
In our last synthetic benchmark, we use the AS SSD benchmark. Here is where I experience the pain. AS SSD simulates a much more intensive workload than the others and the HDD takes a long time to bench. The Kingston seems to again slightly outperform the Samsung on read speeds, although the write speeds again drop the ball from the 850 Evo. The WD Black puts in a heroic performance (as do I!) and after what must be an hour or more spits out a measly score!
What’s interesting here is that the lead for the Kingston in the Read score is enough to give it an overall points victory over the Samsung according to AS. This must mean that the score is heavily skewed towards the 4k-64Thrd test (which is referring to a 4k size read with a stack of 64 such requests at once).
Transfer Speed
Copying a single 30GB (shadowplay at 4k, what can I say??) file from the 850 Evo to the Kingston M.2, we see what we broadly expect from the benchmark results. After an initial burst of keeping up with the incoming data, the Kingston becomes the slight bottleneck in the copy process and the Samsung (Disk 0 in the Task Manager) is never particularly pushed hard to keep data flowing while the Kingston (Disk 2) is at capacity.
Samsung to Kingston disk usage...
Where things get really surprising, is in the next test. I wondered how the Kingston would manage feeding data to the (benchmarked) faster Samsung if I reversed the copy. So I deleted the source directory on the 850 Evo and copied the directory back.
What a startling result!
Initially, the Samsung does as expected and starts writing data at a higher rate than the Kingston did. Both drives are basically at maximum capacity (both read and write). However, a little over halfway through the test, the Samsung drops the ball. Where by the end of the test, the Kingston was still getting rates roughly representative of its benchmark results (316MB/s in the screenshot), the Samsung rate nosedives down to 254MB/s!
As you can see from the task manager, Disk 2 (Kingston) usage drops off massively while the Samsung is still showing max usage.
Kingston to Samsung
Contents
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About the author: Run Product Management for Aquis stock exchange. Designed, built and managed several market making, algorithmic and aggregation trading systems for most exchange traded asset classes including Equities, FI, FX and Commods cash and derivatives markets as well as multi-venue FX spot. Massive PC gamer!
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