We have improved the resolution, high count-rate performance and quantum efficiency (QE) of the Vortex silicon drift detector (SDD) by integrating it with new front-end electronics and by increasing the thickness from 0.5 mm to 1.0 mm. A series of tests indicates excellent results: a QE that matches theoretical values and enhancement of the throughput at practical dead time (DT) operation. An output count rate of 1.6 Mcps at 2.0 Mcps input count rate (20% DT) using the “Quantum Detectors” Xpress3 processor is achieved with an energy resolution of ~200 eV.