What is Dash?
Dash (DASH) is an open sourced, privacy-centric digital currency. It was originally released as XCoin (XCO) on January 18, 2014.
Differences between Litecoin and Dash
With chained hashing, high end CPUs give an average return similar to that of GPUs. Another side effect of the algorithm is that GPUs run at about 30% less wattage than scrypt and 30% to 50% cooler, putting less stress on the computing setup and ensuring lower energy bills for miners.

Currency supply
Estimated 22 million coins maximum, with a 7% decrease in the number of coins generated per year.
Chained hashing
Dash uses a chained hashing algorithm approach called X11. Instead of using the Secure Hash Algorithm (SHA) 256 or Scrypt it uses a sequence of eleven scientific hashing algorithms for the proof-of-work.