I read somewhere that it is not a good idea to connect a Fob38 to the CPU_FAN connector on the A7V Mobo because it draws to much current and could damage the Mobo. Would POWER_FAN connector be better? Anyone knows if this one has a higher capacity
I don't like to connect it directly to one of the power connectors coming from the power supply because it is not monitored that way.
I believe that all of of the fan connectors on the mainboard can deliver the same amount of current, so I'd say that it doesn't matter which one you use.
I am pretty sure that the A7V is a pretty good board when it comes to high power consumption levels. If the board, against all odds, gets permanently damaged you should be able to get a new from your vendor.
Be sure to check first though.