The manufacturer showcased the Mars III, a dual-GPU graphics card based on two GK104 GPUs in SLI. The images shown below seem to depict a GeForce GTX 690 on steroids, as ASUS has done everything it could to make the card as fast as possible. The PCB is of ASUS' own design and is significantly larger than that of Nvidia's GTX 690. Although the large heatsink prevents us from seeing exactly what the additional space is used for, a stronger power design is undoubtedly present. The three eight-pin PEG-connectors give a good indication of the power this behemoth requires.
Clock frequencies have not been announced, but they're likely to exceed Nvidia's reference GTX 680 speeds. In order to game on multiple screens without limitations, ASUS has doubled the amount of memory from 2 GB to 4 GB per GPU. This means that the card has a record total of 8 GB GDDR5 memory. The back of the card is covered by a large black metal backplate, which functions both as cooling and reinforcement. The back of the card also shows an SLI connector, meaning true die-hards can even use two of the cards in an SLI configuration for maximum performance.
The two-headed beast uses a dual-slot cooler containing three fans. The center fan is kept larger than those on the sides. The plastic hood on top of the heatsink provides an optimal airflow for maximized cooling capacity. Nvidia's GTX 600 series also supports gaming on four screens, resulting in three DVI outputs and a mini-DisplayPort connector. ASUS Mars III will be available in limited quantities, like the previous Mars graphics card, which used two GF110 chips (double GTX 580). It's very likely that the exclusive card will cost more than £800.
ASUS Mars III (source: Techpowerup)
More photos of ASUS' Mars III (Source: VR-Zone)