HyperX at CES 2018: Predator DDR4 with IR Sensors for Better RGB Sync
 

LAS VEGAS, NV - HyperX announced it has designed IR communication channels into each of their new HyperX Predator DDR4 RGB modules which will allow multiple modules to sync in LED lighting. In other words, each DRAM module has an IR sensor on it in order to detect the stick next to it (during startup, the module furthest away from the CPU is determined to be the ‘master’). If the sensor is blocked, the RGB will be static.

The reason for this method of sync, HyperX says, is because different motherboard vendors have different ways of implementing memory traces, which can affect RGB LED timing. Motherboard vendors typically use either a daisy chain or a T-Topology design rule, which both have pros and cons when it comes to timing - with this IR method, HyperX says they can ensure that no matter what layout, the modules will stay in perfect sync.

https://www.anandtech.com/show/12336...dator-rgb-sync