Power and Temp
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 HWiNFO64 sensor data to record the results. We report on the HWiNFO64 sensor data for “Total Board Power” 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.
Power
The Board Power of the Radeon RX 7900 XT at default is rated at 315W, and in our testing, we got 310W Total Board Power Watts. When we overclocked it, the power increased to 355W, an increase of 45W or 15% higher power utilization. The amazing part is that while overclocked the Radeon RX 7900 XT is sitting at about the power (just a little more) than the Radeon RX 7900 XTX at default. Overclocked, it uses about 50W less power than an overclocked Radeon RX 7900 XTX. The not-so-good part is the efficiency, we are only getting about a 6-8% performance increase, for a 15% higher power increase, and that is not very efficient.
Temperature
The default GPU temperature of the Radeon RX 7900 XT is 63c and the Hot Spot is 78c on the MBA (Made by AMD) reference video card. These are good temperatures, unlike the Hot Spot temperature was on the Radeon RX 7900 XTX when we overclocked it. Overclocking the Radeon RX 7900 XT, with 100% fans, increased the Hot Spot up to 85c, but actually lowered the GPU package temp, again with 100% fans. The GPU package temp is great, but the increase in Hot Spot temp, even with 100% fans, is interesting.
The memory Junction temperature hit 92c at default, and this was actually higher than the Radeon RX 7900 XTX’s 88c at default. When we overclocked with 100% fans the memory was 86c.
HWiNFO64 Screenshots
On the left is HWiNFO64 showing Default settings, and on the right is HWiNFO64 showing our Overclocked settings on GPU and memory.