Power and Temperature
To test the power and temperature we perform a manual run-through in Cyberpunk 2077 at “Ultra” settings for real-world in-game data. We use GPU-Z sensor data to record the results. We report on the GPU-Z sensor data for “Board Power” and “GPU Chip Power” when available for our Wattage data. For temperature data, we report the GPU (Edge Temp of the GPU or Package Temp) as well as Hot Spot (Junction Temperature) when available for our temperature data.
The TDP of the AMD Radeon RX 7800 XT is rated at 263W. According to GPU-Z the board power by default is 254W according to our testing while gaming. When we overclock the AMD Radeon RX 7800 XT the board power rose to 291W which is a 37W increase or a 15% increase. In our review, we saw only a 5-8% performance increase, therefore the power increase for the performance increase is not efficient.
When the Radeon RX 7800 XT is overclocked at 291W, the power difference versus the GeForce RTX 4070 is a whopping 48% difference. The GeForce RTX 4070 is much more power-efficient for the performance it is delivering.
Keep in mind that for the overclocked data you see above, we have both fans on the video card set to 100% fan speed for the overclock. The made-by-AMD Radeon RX 7800 ran at 73c GPU and a very high 94c Hot Spot at default. When we overclocked at 100% fan speeds, that brought the temps down to 59c GPU and 83c Hot Spot. We still found the Hot Spot temp rather warm considering it’s at 100% fan speed.
GPU-Z Sensor Data Overclocked
On the left is GPU-Z sensor data at default, and on the right is GPU-Z sensor data overclocked.