GeForce7: Battle for the Watts
As is known, the reduction of the graphics chip power consumption was one of the goals the GeForce7 developers tried to achieve when they were working on this solution. This way, a much faster GeForce 7800 GTX consumes only 3W more power than the GeForce 6800 Ultra. And what about GeForce 7800 GT?
Since the market our today’s hero is targeted at is much more sensitive to the PC component pricing, it would be very logical to suppose that the system intended for NVIDIA GeForce 7800 GT is less likely to have a pricy and powerful PSU. According to NVIDIA, GeForce 7800 GT requires a 350W power supply unit, which is not an extraordinary specification nowadays.
While generally our power consumption measurements are very precise, this time we would recommend to consider them cautiously, as NVIDIA GeForce 7800 GT graphics card behaved very strangely during the measurements. Our multimeter, indicated that the graphics card consumes nearly nothing from 3.3V lines (about 2.1W), which is something that we see for the first time. Still, power consumption of approximately 57W seems to be correct, as the GeForce 7800 GTX that has more pixel and vertex pipelines enabled and operates at higher clock-speeds consumes about 80W.
We also attempted to measure power consumption of the GeForce 7800 GTX with 20 pixel and 7 vertex processors activated and set to operate at the clock-speeds of the GeForce 7800 GT. It is interesting to note that power consumption of such emulated GeForce 7800 GT (marked with asterisk on the graph) consumes more than the real GeForce 7800 GT, which probably means that voltage settings of the 7800 GTX model are higher compared to the 7800 GT version.