Recommended signal trace length matching requirements can be found in Table 10-4 and Table 10-5. When length matching traces, the longer signals should be routed in a serpentine fashion, keeping the number of turns to a minimum and the turn angles no sharper than 45 degrees as opposed to running long traces over large areas of the PCB.

Signals in Table 10-4 should be routed for data rate operation at up to 3.2 Gbps. Layer changes for these signals should be minimized, the number of vias should be minimized. Avoid sharp turns and layer switching while keeping lengths to a minimum. When layer changes are necessary, GND vias should be placed around the signal vias to provide a signal return path. The distance from one pair of differential signals to another shall be at least 2 times the distance within the pair.