For sale: The legendary XFX AMD Radeon HD 6990 graphics card. This card was considered the most powerful in the world at the time of its release, thanks to its dual-GPU design on a single board. **Specifications:** * **Memory:** 4GB GDDR5. * **Ports:** 4 Mini-DisplayPort and 1 DVI port. * **Condition:** Very clean, as shown in the pictures.