More exotic processor approaches
IRAM (intelligent RAM) or PIM (processor-in-memory) approaches couple processor execution with large, high-bandwidth, on-chip DRAM banks.
Reconfigurable computing devices replace fixed hardware structures with reconfigurable ones in order to allow the hardware to dynamically adapt at runtime to the needs of the application.
Asynchronous processors remove the internal clock. Instead of a single central clock, all parts of an asynchronous processor work at their own pace, negotiating with each other whenever data needs to be passed between them.