You can read more about TweakTown's Storage Product Testing Workstation and the procedures followed to test products in this article.
Today we are testing Silicon Power's Armor A80 USB 3.0 640GB portable HDD. The performance shown today represents the 640GB model, where other capacity sizes will perform a little differently.
ATTO Baseline Performance
Version and / or Patch Used: 2.34
ATTO is used by many disk manufacturers to determine the read and write speeds that will be presented to customers.
The highest speed we have been able to achieve from our GIGABYTE X58A-UD7's onboard NEC USB 3.0 chip has been just over 200MB/s. This was with a USB 3.0 SSD based on the Indilinx Barefoot SSD controller. While testing the Silicon Power Armor A80 I was surprised to see such an abrupt cut off at 100MB/s for both the read and write speeds. This prompted me to break out the ADATA USB 3.0 SSD again to verify that the motherboard was still handling USB 3.0 data the same as it did in my previous USB 3.0 tests.
The end result was the ADATA drive still being able to reach 200MB/s. That means that the Silicon Power Armor A80 is truly limited to 100MB/s read and write speeds. This is a far cry from the claimed speed of 5Gbps and the number one reason why we hate to see a product only being listed with the generic USB 3.0 speed.