Based on the reference model, the two new cards have dual-slot cooling solutios, PCI-Express 2.0 interfaces, CrossFire X support, are equipped with PLX PCI-Express 2.0 bridge chip and boast two PCIe connectors (each) for additional power. In terms of clocks, the R4870X2-T2D2G features a GPU set to 750 MHz and 3600 MHz memory while the OC model has the same memory frequency but a GPU clock upped to 780 MHz.