ASUS Graphics Cards R9280-DC2T-3GD5 TOP-selected 980MHz cores run 50MHz higher than reference for smoother gameplay All new DirectCU II thermal design with 10mm heat pipe to maximize direct GPU contact achieving 20% cooler and 14dB quieter performance than reference 12-phase DIGI+ VRM power design with Super alloy Power technology offering ample overclocking headroom GPU Tweak utility helps you modify and tune clock speeds, voltages, and fan performance via an intuitive interface - working on up to four cards through AMD CrossFireX