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 speeding up its spindle)
- 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.
A solid state drive has no platters to spin up, so their power consumption is very low from the very start, even if you compare them with 2.5-inch HDDs. The Corsair requires only two thirds of the current that the other SSDs need.
The Corsair is twice more economical when idle. On the other hand, all SSDs consume very little – less than 1 watt – in comparison with 2.5-inch 5400rpm HDDs.
The power consumption grows up when there are random requests to be performed. However, the SSDs all remain within 1 watt at random reading, the Corsair again being twice as economical as the Intel SSDs.
When we switch from reading to writing, the SSDs increase their power consumption because the controller is working more actively and the memory cells need more power. The Corsair is still the most economical drive, consuming a little more than 1.5 watts. The 80GB Intel X25-M needs about the same amount of juice. The other two models from Intel consume more than 2 watts but less than 2.5 watts. Of course, we don’t think that someone will use such high-performance SSDs over USB, but anyway.
If linear operations are substituted with sequential ones, the SSDs consume less at writing and more at reading.