High-performance CPU runs at 9900K during gaming sessions.
High-performance CPU runs at 9900K during gaming sessions.
I own a 9900k with XMP enabled but multi-core turned off. Monitoring shows that during intense gaming sessions, all eight cores stay consistently at 4700MHz in some titles like Modern Warfare and Destiny 2, while others maintain a more variable frequency. For instance, both games keep all cores locked at 4700MHz throughout the game, regardless of menu settings or startup conditions. I explored additional titles such as Red Dead Redemption 2, DMC 5, and Resident Evil 2, and noticed similar behavior—cores aren’t always pinned to 4700MHz like in Destiny or certain games. It seems my setup is functioning as expected, but I’m curious whether this is typical or if there’s something unusual happening.
The 9900K runs with Turbo Boost 2.0. https://ark.intel.com/content/www/us/en/...0-ghz.html In this setting, every active core operates at the identical boost level continuously. Whether idle, partial load, or full load, it stays consistent. If two or more cores are running, they all share the same boost percentage. This is the standard behavior of Intel CPUs. If HWMonitor displays varying boosts for individual cores, that's not realistic. Disregard such readings. Certain tracking tools don't adhere to Intel's guidelines and may falsely indicate boost levels from inactive cores in low-power states. This information is unreliable and offers no real value.
I rely on ThrottleStop to display the average multiplier for each thread. Understanding Intel CPU behavior with Turbo Boost 2.0 helps explain why you might see varying multipliers across threads. This tool is more suited for laptops than high-performance desktops, and it doesn’t fully cover the capabilities of 9th Gen desktop CPUs with eight cores. It should present multiplier data accurately but won’t capture all core states. The graphs provided by Intel XTU are reliable, though the app itself can be cluttered and may not appeal to everyone. Most other monitoring software tends to claim all cores run at different speeds, which isn’t realistic. These processors use just one multiplier at any given time. For instance, a ThrottleStop run on a six-core mobile CPU shows consistent FID values across threads since all cores are active. It aligns with Intel’s recommended monitoring approach. The MSI Afterburner used in gaming also struggles with inactive cores, as they don’t apply any multiplier. In technical terms, inactive cores aren’t counted in the multiplier calculations.
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Additionally, employing AVX might result in reduced clock speeds. At least with the stock 8700K, titles such as Destiny 2 would run under 4.3GHz.