Looking for a fast ROM for your Atrix 4G? If so, you might want to try out the Auora ROM, which comes with Ext4 filesystem (makes your file i/o read and writes much faster) plus 1.3Ghz overclocking. I was getting over 3500 on Quadrant benchmarking, which is a vast improvement over stock.
You will need the updated ClockworkMod Recovery for this ROM so don’t forget to update!
Download ROM here:
Download Aura ROM