The ARM chip is very hot

Hello.

I'm not very well to english.

I connect the USB or the external power (12v) and without programming the Arduino Due ARM Chip (The chip, not the regulator) heats a lot.

I put an radiator, but it's very very hot (50ºC~).

I can program and works Ok, but it's a little strange. All arduino due has the same problem?

Thank you.

There is something wrong, the ARM chip shouldn't get hot.