A Closer Look
Normally, RAM isn’t much to look at. What it amounts to is a long, thin PCB with a single row of chips along either side, and a bunch of gold connectors along one edge. If it’s high performance memory, it may have heat spreaders bonded to the sides, usually with the company logo.
Crucial has done something interesting with the Ballistix Tracer memory, though. They’ve bonded a series of LEDs to the top and bottom of the PCB. The top LEDs alternate between red and yellow, and flash in a repeating sequence according to memory activity. The bottom LEDs are all blue, and emit a constant glow down near the connector pins. The effect is rather mesmerizing in action, as you can see:
Odd as it may sound, this bit of inbuilt flash is actually useful, in a small way. Since the top LEDs flash according to memory activity, you can tell how busy the system is by watching the LEDs in action. The system was at idle when the video was taken, when under load it flashes two to three times faster.