Radeon HD 6990

The Radeon HD 6990 is a dual-GPU graphics card from AMD, launched on March 8, 2011 as the flagship model of the Radeon HD 6000 series. It is built on the 40 nm process node and features two Antilles XT GPU chips, each with 3072 shading units total, operating at a base clock of 830 MHz. The card comes with 4 GB of GDDR5 memory across a 256-bit bus, delivering a memory bandwidth of 320 GB/s. With a board power of 375 W, it requires substantial cooling and power supply. The Radeon HD 6990 uses a PCIe 2.1 ×16 interface. This graphics card was designed for extreme gaming and high-performance computing, offering double the shader count and memory bandwidth of single-GPU cards from the same generation.