OWC Mercury Helios PCIe Thunderbolt Expansion Chassis Review – Imagine 800MB/s and 150,000 IOPS


We didn’t want to finish off with AS SSD just yet as its Copy Benchmark is integral to the Helios and file transfers.

Unexpectedly, we were very impressed with the speeds of the Accelsiors transfers but, with the 910, this just hasn’t been seen prior with the total transfer time of the ISO being just over 1.5 seconds.To some, this benchmark specifically may be the key to the purchase of the Mercury Helios.


We are going to pull in a new performance benchmark today by the name of QuickBench.  Much like ATTO, Quickbench measures the transfer speeds of a files of different sizes, ranging from 4kb to 1024km.

Our QuickBench results appear to mimic that of our Crystal DiskMark results very closely.


You may not see this for long (and its definitely not common) but you get a freebee simply for reading!  Over the last little while, we have been assisting with beta testing new benchmark software called Anvil Storage Utilities which is an absolutely amazing SSD benchmarking utility.  Not only does it have a preset SSD benchmark, but also, it has included such things as endurance testing and threaded I/O read, write and mixed tests, all of which are very simple to understand and utilize in our benchmark testing.

This is the second time we have observed low IOPS through use of the Accelsior and this has no bearing on the effectiveness of the Mercury Helios, thanks to the Intel 910.  Once again, both units were tested using their ideal data samples and, particularly impressive were the 910 IOPS once again, considering this is comig from an external storage device.


  1. 800 GB/s or MB/s in the title?

  2. While prices remain high, Apple itself sells thunderbolt cables at $10 cheaper than the one you used: https://store.apple.com/us/product/MC913ZM/A/apple-thunderbolt-cable-20-m

  3. hi there be fun having quadrupple 800 mb/s ssd in a ps4 xbox 720 or wii u 2

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