Gigabyte Radeon HD 5770

"The Gigabyte Radeon HD 5770 uses the RV850 GPU at 850Mhz and has 1GB GDDR5 memory running at 4800Mhz. The Gigabyte Radeon HD 5770 has a 128Bit Memory Interface, 800 Pixel Shaders and DirectX 11."

"The Gigabyte Radeon HD 5770 gave some great performances against the Gigabyte Radeon HD 4770. The Gigabyte Radeon HD 4770 gave a good performance but was never going to beat the Gigabyte Radeon HD 5770. The Gigabyte Radeon HD 5770 offers some advanced features like DirectX11, 1GB of Super Fast GDDR5 Memory and 720 Shader Processors. The Gigabyte Radeon HD 5770 outperforms the Gigabyte Radeon HD 4770 by 19% Overall. Ultimate Hardware Highly Recommends the Gigabyte Radeon HD 5770."