Broken mosfet on 5850oc Gigabyte,i need some help:)

Hello i have a broken mosfet on my card (5850oc from Gigabyte),i tryed to fix it but the broken mosfet does not work,the good thing is that there are two more identical mosfets on the graphic card and i need some help to recognize them,so i will post 2 pictures and maybe someone can help to,to find it so i can buy it.here are the pictures
https://imageshack.us/photo/my-images/832/newma.jpg/
closeup on the mosfet i need
https://imageshack.us/photo/my-images/36/newej.jpg/
and the broken
https://imageshack.us/photo/my-images/137/p6050151.jpg/
the numbers on it are 70,3 and a rotated 5
thnx in advance

here another picture closer one
https://imageshack.us/photo/my-images/36/newej.jpg/

2N7003 in sot23 casing.