Thermaltake Element Q
The last Mini-ITX chassis in this round-up is the Thermaltake Element Q that's been around since 2010. It's a very compact chassis that has room for a standard optical drive, a hard disk, and a fairly long single-slot graphics card.
Since it's older you only get USB 2.0 ports and audio connectors, but the chassis only costs £54 and includes a 220-watt power supply. We're less excited about the sharp edges on the inside, and the lack of active cooling causes the temperature to rise to more than 55 degrees before halting the test. That means you can't put a powerful system in there.