If you don't often use USB flash drive/removable hard disk, buy UD3P. Save it in 200 yuan. After two years, there are more USB3.0 devices, and then we will change the motherboard. It is estimated that 350 won't be needed then. We don't know the power supply mode of these two boards. We can only decide according to the real thing. There are two kinds of power supply: "voltage regulation" and "switch", the latter is better.