The correct unit of DRAM R/W bandwidth?

5950X 3800Mhz 16Gx4, when OCCT Memory SSE+Fixed+32Threads stability test, get 29.4R/17.8W reading form HWiNFO. Recently added from 2 to 4 stick then get random WHEA BSOD when idle, probably undervolting CPU Core too much. But your software should depend on official document, aka where you read that number from. Also better use GiB/s, because GB/s might mean GiB/s in some uses but GiB always mean GiB.