The AMD FX-9590 Black Edition is a 4.7 GHz Vishera 8-core 32nm CPU that uses the AM3+ socket for motherboards. It uses 220W and requires liquid cooling.
Pro Easily overclocked
Being that this chip requires liquid cooling in order to not burn itself into oblivion it is quite easy to overclock the chip in order to get a better performance than the stock speeds. The chip is not locked, meaning it can be overclocked as high as one can get it to go without locking up.
Con Uses a lot of power
Due to how much power this chips need to perform there is only a small selection of compatible motherboards. This means that anyone with an older AMD compatible board will not be able to use this chip. It also means there will be less variety in good boards to purchase.
Using a lot of power also has the downside of a higher electric bill if using the PC a lot as well as more opportunity for the chip to wear itself out early (of which there have been quite a few reports of.
Being that this has a high rate of power consumption there is quite a lot of heat produced by this chip. It runs really hot. Running hot is such an issue that it is highly recommended to use this with liquid cooling, which adds to the overall price of using this chip.