TOXIC SAPPHIRE X1900 XTX Specifications TOXIC Liquid Cooling System Pure Copper Water Block for superior heat conductivity Pure Copper Radiator for great heat dissipation Speed adjustable transparent blue LED fan (18/26dBA at 2000/2500RPM) RADEON™ X1900 XTX core (675MHz) 512MB GDDR3 onboard memory PCI Express x16 Dual DVI Video-In and Video-Out 2 Sapphire Select Unlock keys