The GE9X was selected to power the new Boeing 777X. The GE9X will be the most fuel-efficient engine GE has ever produced on a per-pounds-of-thrust basis, designed to achieve a 10% improved aircraft fuel burn versus the GE90-115B-powered 777-300ER and a 5% improved specific fuel consumption versus any twin-aisle engine at service entry. In addition, the engine will deliver an approximate 10-to-1 bypass ratio, a 60-to-1 overall pressure ratio and margin to Stage 5 noise limits.
The Boeing 787 Dreamliner has the GEnx engine. There are 320 engines in service.
The Boeing 777 has GE90 engine. There were more than 1,675 engines delivered.