Thermal grease with the 64 cpus?

Ok ive seen pictures of the 64 bit cpus and they have the little metal piece on them and soon in the future I might build one. But what I wanted to know do you still use thermal grease and if so do you just put it in the center or on the whole thing. Cause you used to only put in on the center core right?

 

You'll want to apply it to the surface that contacts the heat sink. It won't take a whole lot, so when applying it make sure that it isn't going to squeeze out all over the rest of the processor.

 

http://www.arcticsilver.com/arctic_silver_instructions.htm

Take a look at the instructions for the A64...