To Overclock, edit the config.txt file on the SD Boot card.

Change line 43 #arm_freq=800 to the following...

1.45GHz Overclock

gpu_mem=400
arm_freq=1450
over_voltage=6
sdram_freq=500
core_freq=500
gpu_freq=400

1.4GHz Overclock

gpu_mem=400
arm_freq=1400
over_voltage=6
sdram_freq=500
core_freq=500
gpu_freq=400

1.35GHz Overclock

gpu_mem=400
arm_freq=1350
over_voltage=5
sdram_freq=500
core_freq=500
gpu_freq=400


1.3GHz Overclock

gpu_mem=400
arm_freq=1300
over_voltage=5
sdram_freq=500
core_freq=500
gpu_freq=400


 Original Line:

#arm_freq=800

Thanks to ETA Prime for this info.