You really need to get a better cooler. The stock cooler is not efficient when overclocking.
54 degrees is not deadly, but it's not the optimum temperature you want. Most people's temperatures idle are around 25-30 and under full load it's in the 40's.
I'm user the Cooler Master Hyper 212+. It's only $30 and it does an excellent job with overclocked CPUs.