AMD introduced a new $50-$60 DirectX 11 graphics card, the Radeon HD 6450. This model uses a 40nm Caicos GPU and has a TDP of 27W. It's expected to become available in retail stores on April 19th.
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.