AfterDark. Constellation Giesemann Xe Extreme Dual 10G SFP+ Ultra Low Latency NICAfterDark. Constellation Giesemann Xe Extreme Dual 10G SFP+ Ultra Low Latency NIC The very first Ulimate Audiophile network card which build in 10M Master Clock Sync Module for Audiophile. We performed real listening test and music playback is approaching perfection, it is so much refine and organic with Xe and Giesemann EVA OCXO Reference Master Clock. The design is based on the unique material on shielding layer, selection on Carbon Fiber, the