Temperature Testing
On this page, we are going to investigate the Intel Core Ultra 9 285K and Intel Core Ultra 5 245K temperature. We are going to look at this two ways, first running an all-core, full-load stress-test scenario, and then we are going to look at CPU temps while gaming. All readings are taken with HWiNFO64. We are using the exact same AIO for all temperature testing, an MSI MEG CORELIQUID S360 AIO Cooler using the default mounting hardware.
Temperature – Cinebench R23

In this graph above we are pushing all-cores in Cinebench R23 as a stress-test at full-load. There has been an improvement in temperatures, we can see the Intel Core Ultra 9 285K is running about 4-5 degrees cooler than the Intel Core i9-14900K, about a 5% difference for this maximum workload. The AMD Ryzen CPUs still run cooler though, the new Ryzen 9 9950X runs 10% cooler, or an 8-9 degrees difference.
The Intel Core Ultra 5 245K is also running much cooler than the Intel Core i5-14600K, which is the largest improvement in temperatures. The 245K is around 19 degrees cooler than the 14600K or 28%, which is quite the difference in temps. This puts the 245K on par with the temps of the 9900X. The 9700X and 9600X ran the coolest.
Temperature – Gaming

The temperatures above are what we experienced while playing Cyberpunk 2077, using a manual run-through in-game. The Intel Core Ultra 9 285K ran at around 70c, which is an improvement over the previous generation Intel Core i9-14900K at 79c while gaming, which is about a 13% reduction in temps. This puts the 285K on par with the temps of the 9900X, the 9950X does run about 8% warmer, but again there is a big performance difference with the 285K not performing well.
We also see the gaming temps with the Intel Core Ultra 5 245K improving quite a bit compared to the Intel Core i5-14600K. The 245K sees a 16-degree or 28% difference compared to the 14600K. In fact, these temps are the lowest on the graph and are close to the 9700X in temps.