Power Usage and Temperatures
For some people, performance is the only thing important, but for others, power usage and temperatures also play a role so we do take a look at both of those as well. This is especially important in SFF or even just smaller mid-sized builds and it affects the components you need to get for your system as well as your PSU and cooler. To take a look at power usage I ran three different tests. I noted the idle power draw of our entire system then I took a look at the load wattage of the system using two different workloads. One was wPrime and the second was AIDA64 using their FPU workload which is extremely demanding. At idle the testbench with the 7950X3D pulled 115 watts which was similar to what I saw with the other 7000 Series CPUs with its high idle power usage. With the lower 120-watt TDP however it is notably better when put under load than the other 7000X CPUs. With wPrime, the system pulled 245 watts which was still 48 watts more than the 13900K but 88 watts lower than the Ryzen 9 7950X. With AIDA64’s FPU stress test as the workload the system with the 7950X3D inside pulled 233 watts. The 13900K here pulled 101 watts more in this situation and this was 72 less than the base 7950X as well.
With the initial 7000X Series Ryzen CPUs we saw that all of the CPUs in addition to having a higher power draw also would ramp their clock speeds up and keep the CPU running at 90c and higher no matter the cooler you were running. The 7950X3D does that same thing, but AMD has toned things down with the TJMax at 89c from 95c on the other X CPUs. With the wattage being 50 watts lower as well the 7950X3D ends up performing similarly to the Non-X Ryzen 7000 Series CPUs with it peaking at 79c in my testing which puts it in the middle of our chart and right with the 13900K which runs 1 degree warmer.