The HD 6450 is based on the 40 nm Caicos GPU, it packs twice the amount of shader compute power as the previous generation, packing 160 VLIW5 stream processors, 8 TMUs, 4 ROPs, and a transistor count of 370 million. The 160 stream processors, with a core speed of 625~750 MHz (differs between AIBs), churn out compute power of up to 240 GFLOPs. It packs a 64-bit wide memory interface, that supports GDDR5 (clocks: 3.20 GHz to 3.60 GHz) and GDDR3 (1066 MHz to 1600 MHz). It has an idle board power of 9W, and max board power of 27W. Most implementations are low-profile single-slot, some even passive. The reference board features display outputs that include DVI, HDMI 1.4a, and D-Sub.
Source: TPU