Inspecting the Card
As we mentioned earlier, the Gigabyte GV-NX79X512DB-RH doesn't stray very far from NVIDIA's reference design and specifications. In fact, this board was equipped with the very same BIOS revision as the reference GeForce 7900 GTXs we tested back in March of this year. About the only thing on the GV-NX79X512DB-RH that differentiates it from a reference board is the "Gigabyte" sticker smack dab in the middle of its cooling fan.
The GV-NX79X512DB-RH is powered by NVIDIA's G71 GPU and 512MB of GDDR3 memory. By default, the GPU is clocked at 650MHz and the memory is clocked at 1.6GHz (800MHz DDR). If you'd like a more detailed description of the technologies employed in the G71, we recommend taking a look at this article. We explain what makes the G71 tick there.
The Gigabyte GV-NX79X512DB-RH is equipped with a two-slot cooler, similar to the one used on the Quadro FX 4500 and 512MB GeForce 7800 GTX. The cooler has a large copper heat-plate in the center and is flanked by two large banks of aluminum fins. Connecting the heatsink's fins to the heat-plate are four liquid filled heat-pipes (two per side). In the center of the cooler is large, variable speed fan that blows air over the heatsink's fins, where its then exhausted from the system through vents in its mounting plate.
This card sport dual, dual-link-DVI outputs and a video output, along with the same SLI connector found on other SLI enabled GeForce cards. Gigabyte, however, includes a small cover presumably to keep the SLI connector safe. The DVI and TV outputs can be used to power dual independent displays simultaneously, or four displays should two 7900 GTX cards be installed in a single system.