Maximum Surface Temperature

We monitored the surface temperature of the external drives and USB flash drives during their benchmarks. The following chart shows their operating temperature range, from idle to maximum load. Please note that instead of giving you the absolute numbers, we are showing the temperature delta, which is the difference between the actual temperature and the ambient room temperature.

Surprisingly, the OCZ Enyo was the coolest external drive in both USB 3.0 and USB 2.0 modes. It even beat USB 2.0 flash drives with smaller storage capacities. Of course, this is partly due to its much larger aluminium case, which helps in dissipating the heat it produces.

Transfer Rate Profile

When it ran in USB 2.0 mode, the OCZ Enyo was limited to a flat transfer rate of 35 MB/s throughout the entire storage capacity. That said, it is one of the fastest USB 2.0 transfer rates we have seen. Some portable 2.5" hard disk drives, like the 500 GB Seagate FreeAgent GoFlex drive for example, could only deliver a truly pathetic 20 MB/s in its USB 2.0 mode.

When we switched the OCZ Enyo to a USB 3.0 port, it was instantly able to achieve its full potential, delivering a maximum throughput of about 200 MB/s. Although that is a very high speed, it was actually 25 MB/s (11.1%) slower than its rated read speed of 225 MB/s.

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