The HIS Radeon HD 4700 Series GPUs features the world’s 1st 40nm GPU and most advanced GDDR5 memory, proofing that high performance gaming and price can co-exist without compromise. With 640 stream processors and most advanced GDDR5 memory interface, which previously only available in 4800 series, the HIS 4770 has the brute strength needed to tackle the latest 3D games. Gamers can take advantage of the powerful DirectX® 10.1 engine, which delivers unparallel image quality and blindingly fast performance that only comes with HIS 4770 series premium graphics.