You can refer to our 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
We’ve got fewer participants here because we can’t measure the power draw of a RAID array or PCIe devices. We also do not want to look for any differences in the power consumption of the Vertex 2 with its two firmware versions.
Let’s check out each mode one by one.
The G.Skill and the Agility 2 have the lowest power requirements when staring up. The latter is especially interesting because the similar Corsair Force and Vertex 2 need somewhat more power. The Agility 2 may have fewer memory chips, we guess. The Crucial, with an ARM processor inside, needs a lot of power, but the OCZ Colossus, being actually two SSDs in one case, needs the most.
The Colossus needs twice as much power as the others in idle mode. Among the other products, the Intel and the Vertex 2 have somewhat better results, but such small differences may even be due to inaccuracies in our measurement methods.
The Vertex 2 is the best under random-address load but the others are rather economical, too, even the Crucial. The Intel SSD acts up: its power consumption is almost twice higher at random writing than at random reading. Anyway, it is the OCZ Colossus that takes last place: having two SSDs inside, it just can’t perform any better in this test.
Every SSD needs more power for sequential writing because there are more data to process. The standings haven’t changed, though, except that the OCZ Vertex 2 enjoys a bigger advantage here. If you want a fast and economical SSD, this is the model to choose among SandForce-based products.