First, it's not 4.5, it is 4.2. This can be overclocked too, and dhl costs as I said. I think bot devices are expensive, but that is on the market, take it or leave it
This is my first post here, and I'm totally newbie How fast can be in percentage? What can be changed, voltage or MHz, or both? Does the heat related with HW errors after overclock or it doesn't metter, even if it's cold?