PowerColor's HD7990 will soon have some competition as HIS (Hightech Information System) is also going to release a graphics card powered by two AMD Tahiti chips. Dubbed Radeon HD 7970 X2 (apparently HIS doesn't want to use '7990'), this new dual-GPU card features a three-slot, dual-fan cooler, three 8-pin PCIe power connectors, a Lucidlogix PCIe switch (the PowerColor HD7990 uses a PLX bridge), a GPU clock of 1050 MHz, and 6 GB of GDDR5 memory set to 6000 MHz.
HIS' HD 7970 X2 also has dual-DVI and quad mini DisplayPort outputs. Pricing and availability are still unknown.
Source: Tom's Hardware