Motherboard Asus M4A79T Deluxe support AMD phenom 9950 BE

You do NOT want a 9950BE. Tell us what your budget is and we can suggest a decent cpu. 9950BE is a slow crappy cpu.

You should be looking at Athlon II X4 or Phenom II X4. Keep in mind you'll likely need to update your bios with the old cpu, before installing the new one.