My 1.2 that I got yesterday has AXIAR, and they Y on the line below. So far I haven't tried to overclock. This is because I can't get the computer to run stable at even the default speed. Fear not though, I think the problem is my MSI KT266 board, and not the chip.
The R might not mean anything though. It's usually the first 4 letters only that refer to the stepping.