A very simple and compact cooling system is installed on the card; it looks more like a cooler for a mainstream or even an entry-level product.
The cooler consists of a copper base with a glued copper ribbing. The whole arrangement is covered with a plastic air-directing casing and is completed with a small blower about 45mm in diameter. The fan consumes 0.19A which may mean too much noise considering its tiny size. The fan’s blades are made of UV-reactive plastic and shine in ultraviolet light. The cooler is secured on the card by means of four spring-loaded screws.
We’ve got the familiar dark-gray thermal paste in between the heatsink and the GPU die. The memory of the GeForce 7900 GT is not cooled at all notwithstanding its rather high clock rate. Previously we only met 500 (1000) MHz memory without any cooling, but the new chips in 136-pin packages are probably less hot. Anyway, proper ventilation inside your PC case is a must if you are going to use a GeForce 7900 GT, and you may want to replace its standard cooler with something more efficient if you are going to overclock it.
Such a simplistic cooler is an indication of the low power consumption of Nvidia’s new graphics processor. For example, the reference cooler on the GeForce 7800 GTX, although single-slot in design, was a rather intricate thing with heat pipes and intelligent fan speed control. But the GeForce 7800 GTX graphics processor worked at a lower frequency: 430MHz as opposed to 450MHz.
We have already tested the power consumption in heat dissipation of the GeForce 7900 graphics cards family in our previous article called Nvidia’s Repartee: GeForce 7900 GTX Graphics Card Review.