Do you have a power problem?

I dont know how to check if it power problem or something else,
but i fount out that the routerboard still running till i start downloading or when many ap s connect
i mean transferring big quantities of data

i have rb 433ah it works from 1 2010 properly but i noticed that it started rebooting every 2 or 3 minutes about 2 weeks, but a few days ago it restarts every 10 or 20 seconds, an it become very hard to use internet i have reset it and re configure it several times but still reboots what can i do so...

i have mikrotik 3.2 server and RouterBoard 443ah + xr2 Access Point the ping becomes 3000ms (wireless)when i start downloading or when hosts becoms more than 4 note:ping still normal when i connect directly to the server i think that the problems in wireless configuration i have just made: bridge (w...