Building or Upgrading a PC? PC Processors are one of the main components that can improve the performance of your computer drastically. Brands such as AMD or Intel. Choose Processors cache size of 6MB, 9MB, 20MB, or any other size, up to 80MB. With a CPU speed of 3 – 3.2 GHz, 3.5 – 3.6 GHz or 3.7 GHz & up.