This /\, there is a reason the Toxic, Devil, Gaming and DC II cost more. They are all custom built cards from the PCB up. Better memory controllers and chips, better quality chokes and a better layout for heat control along with the heat-sink and fans. All of this and more makes these cards able to clock higher as a rule. There will be exceptions as there always is but as a whole the high end custom built cards can clock higher with less heat.