The new SAPPHIRE R9 290 Tri-X 4GB OC  features the latest GCN (graphics core next) architecture from AMD with 2560 stream processing units and an enhanced engine clock of up to 957Mhz. It is equipped with 4GB of the latest high performance GDDR5 memory on a 512-bit interface and now clocked at 1250 MHz (5.0GHz effective) delivering higher bandwidth than earlier models.The new SAPPHIRE R9 290 Tri-X 4GB OC is built on a SAPPHIRE original pcb design with the power design upgraded to a 6-phase VDDC power design. Two 8-pin power connectors ensure adequate system power is available (up to 375 Watts total including PCI-Express power).