In fact, we may need to investigate further on this.
Could you please post the system report from the system you are using:
Intel(R) Rapid Storage Technology (Intel(R) RST) | System reports
In addition, could you please provide the full model of the power supply installed, part number and manufacturer of the memory sticks you have tested with? BIOS version installed in the motherboard, and the part and Serial number number in the motherboard.