HD Tune — Transfer rates
HD Tune lets us present transfer rates in a couple of different ways. Using the benchmark's "full test" setting gives us a good look at performance across the entire drive rather than extrapolating based on a handful of sample points. The full test gives us fodder for line graphs, which we've split up by drive maker. You can click the buttons below each line graph to see how the Extreme II compares to its rivals.
The Extreme II tops the field in HD Tune's sequential write speed test. It's only a few MB/s faster than the contenders nipping at its heels, though.
The same is true in the write speed test, although the field is more spread out. Some of the slowdown in the middle of the pack can be blamed on the peculiar transfer rate profiles illustrated by the line graphs. The write rates of the SandForce- and LAMD-based SSDs oscillate dramatically, lowering their respective averages. There are no such issues with the Extreme II, which maintains a consistent write rate from start to finish.
HD Tune runs on unpartitioned drives, with no file system in place, which might explain the spikes on some of the SSDs. For another take on sequential speed, we'll turn to CrystalDiskMark, which runs on partitioned drives. We used the benchmark's sequential test with the default 1GB transfer size and randomized data.
CrystalDiskMark doesn't change the equation much for the Extreme II. The SanDisk SSD remains the fastest of the bunch in the read speed test. It slips into fourth place in the write speed test but doesn't stray too far from the leaders.
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