🦾Plastic case instead of ceramic

We know how power efficient ARM chips are. In fact, it has been a USP for ARM based CPU designs.

The ARM chip was also designed to run at very low power. Wilson explained that this was entirely a cost-saving measure the team wanted to use a plastic case for the chip instead of a ceramic one, so they set a maximum target of 1 watt of power usage.

Tools for power estimation were primitive, designers knew it, so not to overshoot power budget, they were conservative will every design detail. Simplicity of design and low clock rate results in actual power draw of 0.1 watts.