AMD/ATI has launched Radeon HD 4550 and Radeon HD 4350 graphics cards, both targeted to low-end graphics card segment. Radeon HD 4550 works internally at 800 MHz, has 80 stream processors, access its 512 MB at 800 MHz (1,600 MHz DDR) through a 64-bit interface and costs USD 55. Radeon HD 4350 works internally at 600 MHz, has 80 stream processors, access its 256 MB at 500 MHz (1,000 MHz DDR) through a 64-bit interface and costs USD 39. Both cards are PCI Express 2.0, support DirectX 10.1 and will reach the market next month.