nRF52 Series SoCs Nordic Semiconductor nRF52 Series SoCs run at 64MHz with a 215 EEMBC Coremark® score, 90 Coremark®/mA, 39µA/MHz (flash) and 30µA/MHz (RAM). The nRF52 Series are built for speed to carry out increasingly complex tasks in the shortest possible time and return to sleep, conserving precious battery power. They have a Cortex-M4F processor and are the most capable Bluetooth Smart SoCs on the market.