TUL Corporation in Taiwan have launched the world's first Radeon HD 7990 graphics card with two Tahiti XT GPUs. The PowerColor Devil13 HD 7990 is a dual-BIOS monster, boasting speeds as fast as the Radeon HD 7970. With an overclocked speed of 1 GHz on the second BIOS, it can run all the latest games and HD movies with high frame rates.
The Devil13 HD 7990 has ten U-shaped heatpipes, five per GPU, with three fans, providing exceptional cooling. It includes 12 + 2 + 2 power phases, giving good stability to the power circuitry, and hence the card as a whole. It also has a digital PWM, which helps to keep the temperatures as low as possible.
The default GPU clock speed is 925 MHz, with BIOS 2 offering speeds of 1 GHz. The 6 GB GDDR5 memory is clocked at 1375 MHz (5.5 GHz effective), with a memory interface of 384 bits per GPU, giving a total bandwidth of 528 GB/s.
The card uses a PCI-E 3.0 interface. It has a Dual-Link DVI-I, Single-Link DVI-D, HDMI, 2 x mini DisplayPort connections. DirectX 11.1 is supported, as is OpenGL. It is possible to use two HD 7990 graphics cards in SLI, to effectively give 4 x Tahiti XT GPUs in crossfire.
The maximum VGA resolution is 2048 x 1536,with DVI offering 2560 x 1600. The DP and HDMI connections offer an output of 4096 x 2160.
The PCB is 12.4 inches (315 mm) long, 5.51 inches(140 mm) high and three slots wide with the cooler attached. It uses 3 x 8-pin PCI-E power connectors, allowing for a maximum power draw of 525 W. For reference, AMD HD 7970 uses a maximum of 250W.