ASUS 4GB Memory Video Graphic Cards GTX680-DC2-4GD5 l 4G memory size offers perfect gaming experience at extremely high resolutions 20% cooler and 3X quieter performance with ASUS exclusive DirectCU II thermal solution l ASUS uses 6+2 phase power design and 25 capacitors in DIGI+ VRM and Super Alloy Power technology for precise digital delivery and enhanced overclocked headroom. (compared to 4+2 phase in reference card)