First photos of the upcoming liquid-cooled Sapphire Radeon HD 7990 Atomic dual GPU Graphics Cards have appeared online. The card features a pair of Tahiti XT2 Graphics Processing Units interconnected with PLX PEX8747 PCI-E 3.0 bridge.
The card is fed through three 8-pin PEG connectors. Each GPU has 6+2+1 (Vcc+VDDCI+MVDD) power supply. Main phases consist of two chokes per phase, driver MOSFETs. Card is equipped with Tantalum, as well as a few standard solid capacitors. Each Tahiti XT2 GPU is connected to 3GB of GDDR5 memory, which is kind of disappointing considering that HD 7970 Atomic came with 6GB of GDDR5 VRAM. Not that there's any way to make use of such high amount of memory at this point.
Connectivity consists of six mini DisplayPort connectors. Card supports CrossFireX Quad-GPU configuration with any other HD 7990. The card has a dual BIOS switch.
Most interesting part about Sapphire Radeon HD 7990 Atomic is its cooler. The card comes with a slim full-coverage waterblock connected to a separate water pump and a very thick 120x240 mm radiator with two 120 mm fans spinning at up to 1200 RPM.
Sources: Expreview
