HiI am starting using a DE0 nano SoC, but about 5 or 10 minutes after power it up, the board is hot, maybe 45°C. Compared with DE0 nano (not SoC), this is much hotter. I don't know if this is a problem or it is a normal range or temperature for this board. Thanks.
I have not measured the temperature on the DE0-Nano-SoC board before, but it is definitely not hot to the touch. You should check if the current reading indicates any short on the hardware.