You can refer to our article called Hard Disk Drive Power Consumption Measurements: X-bit’s Methodology in Depth for details on this test. We will just list the specific modes we measure the power consumption in:
- Start (the current the drive consumes when starting up)
- Idle (the drive is not accessed at all, but it is turned on and ready to work)
- Random Read and Write
- Sequential Read and Write
Let’s check out each mode one by one.
The results suggest that the higher the storage capacity of an SSD, the higher startup current it requires. A few interesting facts can be observed. First, some models, e.g. the Vertex Turbo, need a higher current than their cousins. The 60GB Agility needs even more power than the 120GB Agility! It is the Colossus Lite that needs the highest current to start up due to its internal design. The Vertex 2 has low power requirements.
The Colossus Lite needs over 1.5 watts when idle, which is three times as much as the other SSDs need. That’s a terrible appetite.
The Vertex 2 needs more power than the others, too, but its requirements are reasonable at 0.65 watts. The Onyx is the most economical SSD in this test.
When it comes to random-address operations, the Onyx is again the most economical and the Colossus Lite is the hungriest SSD. The 60GB Agility needs a lot of power at writing and the Vertex 2, at reading.
The Vertex 2 is the most economical drive at sequential writing, but is far from brilliant at sequential reading where it is only better than the Colossus Lite which has indecent power requirements. The 60GB Agility consumes an unexpectedly and inexplicably large amount of power when writing.