X299 CPU model 1 W with TDP and XMP support (Intel i7 7820X stock version)
X299 CPU model 1 W with TDP and XMP support (Intel i7 7820X stock version)
Hi, when you turn on XMP on your PC, the power settings list shows your CPU drawing only 1.2W to 1.9W, while it should handle up to 140W. This seems unusual—your specs are decent, but maybe the XMP profile isn’t optimized or there’s a power delivery issue. It could also indicate a problem with your power supply or cooling. Your Cinebench score is good, so power delivery doesn’t appear to be the main concern. Let me know if you want help checking your PSU or BIOS settings.
It displays the power usage once the system is completely loaded. The value provided may not always be precise. The CPU speed during Cinebench R23 can be checked with CPU-Z, and your score seems reasonable given you aren’t pushing the CPU beyond its limits.
When the 7820X is fully loaded and not overclocked, WikiChip indicates it should operate at 4000 MHz. Your system is functioning at its intended speed, so the main issue lies with power consumption data which isn't being reported correctly. Intel CPUs typically don't provide precise power usage metrics—they only offer estimates. This appears to be a retail CPU or an ES/QS engineering sample. Have you installed the most recent BIOS version? The problem might have been resolved in the latest microcode release. This bug doesn't seem to affect performance, and your R23 score aligns with expectations for a 7820X at standard specifications.
I'm using the 3105 model from August 7, 2020. The BIOS that came with the motherboard doesn't support XMP, so I updated it myself. It's a retail CPU, and without XMP the power usage changes based on how it's being used. Now that it runs correctly, why does the power data seem to behave differently only with XMP? Thanks for the help! Also, it has 3200MHz RAM—could that be affecting the readings?
The package's power usage information is meant solely to manage the Intel Turbo Boost function. Altering the precision of this data can trick the CPU into continuously utilizing full turbo boost without limits. The developer of the BIOS for your motherboard likely considered this a useful strategy. Companies frequently employ questionable methods like this. Gaining an edge in performance reviews through such tricks can significantly impact sales. To ensure reliable power consumption readings, you may need to manually adjust memory timings and skip XMP mode.
No one can foresee the future. In the long run, this shouldn't affect your CPU performance. If you're worried, turn off XMP settings. I'd keep it as it is. As long as your CPU remains below the 99°C thermal limit, everything should work okay. https://ark.intel.com/content/www/us/en/...0-ghz.html