ASUS Graphics Cards GTX680-DC2-2GD5 20% cooler and 14dB quieter performance with ASUS exclusive DirectCU II thermal solution ASUS DIGI+ VRM technology with 8+2 phase Super Alloy Power for precise digital delivery and enhanced over clocked headroom. (compared to 4+2 phase in reference card) VGA Hotwire hardware overvolting and GPU Tweak real-time over clocking.