Need a power supply for a m810 v7.5a motherboard

check the main power connector, it can have 20 or 24 pins, that's all you have to know, any PSU will do the job. that board is not very power hungry and if you need special silence it is up to you.
If you look forward for upgrades and stuff, I'm really happy about a Silverstone power supply I have. but you can do with a much cheaper brand and find a solution for about 15-20-25$ or so.

Any AmD compatible power supply