I'm using a Gateway PC (dual core, 4 gigs ram, 10,000 rpm drives in a raid array) firewire out to an MAudio Firewire Solo, to Monarchy DIP, into Musical Fidelity XDac V3 w/XPSU3, Revelation Audio umbilical, nordost digital cable, into Cayin A50T tubed intergraded, nordost red dawn IC, shunyata diamondback with B&W 685 speakers.