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OC 7900x - 2 cores 30°C hotter than lowest

Hi there,

According to Core Temp and HWinfo cores 2 and 8 (which i guess is 3 and 9?), hit 30°C higher than the lowest core under stress testing (Prime95, 12K FFT), after about 90 seconds. They idle around 17°C and don't go above 20°C until 10%+ load. Does this sound like a problem with my thermal paste you think?

OC is currently at 4.5GHz and voltage set to adaptive. Core 2 is taking 1.274V and core 8 is taking 1.298V (93 and 96°C, respectively). For comparison, core 9 (10?) is taking 1.337V and at 79°C. I'm happy with the pressure on the CPU block being even, although i have no way to test save for tighness of nuts. I'm going to reseat the CPU when the new paste arrives but i'm wondering if this sounds indicative of poor paste application?


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Community Manager

Hi isbobtaken: Thank you very much for contacting the Intel® communities. We will do our best in order to provide the information that you are looking for.



In regard to your inquiry, it is expected for each core on the processor to have different temperature values, that is why the temperature is seeing as a general value for the processor itself, in this case the T-junction for your processor is 95°C, under normal conditions, any value below that measure is considered as expected:

Now, since you are doing overclocking on it, it is expected to have overheating problems that might not be related to the thermal paste, remember altering clock frequency or voltage may damage or reduce the useful life of the processor and other system components, and may reduce system stability and performance. Product warranties may not apply if the processor is operated beyond its specifications We recommend to use the processor under stock configuration with the default BIOS settings. We also advice to keep the processor voltage within the ranges you will see on the link below, that way the processor should work just fine, pages 46, 47 and 48:

Additionally we can also run the Intel® processor diagnostics tool that does an overall test in the processor, including a temperature test:



Any further questions, please let me know.





Alberto R