Compatibility upgrade kit for Haswell-ULT i7 4500U processor.
Compatibility upgrade kit for Haswell-ULT i7 4500U processor.
Hi everyone!~ I recently noticed my laptop's CPU downcloks hard under full load. It is NOT Thermal throttling, both the CPU And GPU don't go pass 65 C under full load. From what i've been able to find, it seems like it has some form a power limit at 15W and i was wondering if there is any way to do a power mod, like many people do with the Apollo Lake & Gemini Lake Celerons. Thanks in advance~ Laptop : Acer Aspire E1-572G-7450161TMnll Specs: -CPU : Core i7 4500U -GPU: AMD Radeon R7 M265 -RAM: 16 GB DDR3 @1600 CL 11 -HDD: WD10JPLX 1TB
Assume 800MHz and verify Bi-Directional PROCHOT activation. If the limit is 15W, investigate activating cTDP level 2 through Windows power controls. Reducing core and cache voltage can improve throttling efficiency. IMON scaling adjustments may mislead power perception; they’re risky with batteries. IMON might need hardware tweaks if a design exists. Disabling SVID communications prevents accurate power estimation, letting software limits slip. Confirm power caps are also controlled via MCHBAR+0x59A0/A4—check PECI through the embedded unit. Some knowledge of 8051 systems would be beneficial. Generally, the firmware checks CPU TDP and sets PL1 quickly (often ≤28s), so exceeding it usually requires firmware changes or the methods above.
I really grasped nothing beyond undervolting, but thanks for the response.
Consider starting with simpler adjustments. Run Throttlestop and lower core and cache voltages, plus try setting a configurable TDP (cTDP) to level 2 if available—this could boost performance up to 25W unless blocked by memory-mapped registers or PECI. For further guidance on Throttlestop, feel free to ask the community at http://forum.notebookreview.com/threads/...de.531329/, where helpful contributors are active and knowledgeable.
It's just a configuration to ensure TS (ThrottleStop) can modify it without restrictions, as long as it remains unlocked. I think TS also offers a way to restrict memory-mapped limits. By the way, your HWiNFO image already displays cTDP at level 2 and it's active. The EC (Embedded Controller) can manage this via PECI, which uses a single-wire communication method.
Hello, your question is clear—your processor still shows a high TDP of 25W at 1.8GHz, even though you're on a different system. It might be related to BIOS settings or configuration differences between the two setups. This could definitely be specific to your BIOS version. Let me know if you'd like help checking or adjusting it!
Several Dell laptops from this time period experience significant throttling issues. ThrottleStop serves as a useful tool for diagnosing and resolving typical throttling challenges. https://www.techpowerup.com/download/tec...ottlestop/ The cTDP value indicates the standard frequency, not the boost frequency. Your 4500U operates at 1.8 GHz as the base when TDP Level 0 is active. At TDP Level 2, the base remains at 1.8 GHz. Some U-series CPUs raise the base to 2.0 GHz during higher TDP activation. It seems the 4500U lacks this adjustment. In low power TDP Level 1, the base frequency falls to 800 MHz. For boost frequencies, CPU World reports a maximum of 3.0 GHz with one core running, dropping to a peak of 2.7 GHz when both cores are engaged. https://www.cpu-world.com/CPUs/Core_i7/Intel-Core i7-4500U Mobile processor.html If the CPU hits power limits or thermal constraints, its top speed will drop. Please share many screenshots of ThrottleStop for guidance on achieving optimal performance. Enable the Log File feature and test with a game or Cinebench to observe your system’s behavior. https://www.techpowerup.com/download/maxon-cinebench/