there is an issue with the core speed drop, please assist.
there is an issue with the core speed drop, please assist.
Win7 64 with a Pentium 4790k @4.6 ghz and Gigabyte GA-Z97-D3H. OC runs at 4.6 ghz steadily, dropping to 4.0 ghz under moderate load. Cooling from Noctua is effective, temperatures remain stable. BIOS power management is set to C1E with state support and EIST disabled. Power plan is configured for high performance. BIOS Turbo Boost is turned off, but XTU indicates it is enabled. Please check if the BIOS is saving correctly. Thank you for your assistance.
Before proceeding, verify that your BIOS is current. Turbo boost must be activated for boost speeds to function properly; otherwise, it will operate at a fixed 4Ghz due to the base clock speed. It should remain enabled even when overclocking on Intel platforms starting from Haswell. Even earlier, if I recall correctly, but it hasn’t been a while since I’ve managed a Sandy or Ivy bridge setup for overclocking purposes.
Initially, verify that your BIOS is current. Turbo boost must be activated for the boost speeds to function properly; otherwise, it will operate at a fixed 4Ghz due to the base clock. It should remain enabled when overclocking on Intel platforms starting from Haswell. Even earlier, if I recall correctly, disabling it would be problematic. Nowadays, it’s been a while since I’ve managed a Sandy or Ivy bridge setup for overclocking purposes.
Adjust the main multiplier to 4Ghz. Configure the boost clock multiplier for each core at 4.6Ghz. Avoid setting it to synchronize all cores together. Keep the C-states and Intel enhanced speed step active. Adjust the Windows power plan to performance mode, but lower the minimum processor power state to 8%.
This setup lets the system dynamically adjust core frequency between roughly 800mhz and 4.6Ghz depending on workload. It enables cores to cool down when not in use, which helps maintain lower package temperatures in most cases and can further decrease specific core temperatures during less demanding tasks. This approach also seems to extend CPU lifespan by mitigating thermal damage known as electromigration.
There are several variations of this method, but based on years of overclocking experience, these insights have become clear.
For more details, refer to: https://www.overclock.net/forum/5-intel-...stics.html
Attempt to activate turbo boost while adjusting the CPU clock ratio to 46. Configure all C states to Auto mode. Ensure Intel speed step is enabled. In the control panel, select Performance as the power plan, but define the minimum processor power state at 8% and keep the maximum at 100%. Test it and observe the results. Expected outcome includes a reduction in idle frequency to around 800mhz and a controlled increase to 4.6Ghz under load without automatically setting all cores to that speed. Avoid disabling power-saving features. The response time in milliseconds is extremely quick, making any noticeable impact on performance negligible. Make sure each core's maximum turbo boost is also set to 4.6Ghz to prevent self-limitation. This guide appears to be the most comprehensive for Haswell overclocking, surpassing what you'd typically find online.
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Hey there. I hope everything is resolved for you and you found something helpful on your journey. Wishing you success!