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Lenovo laptop with Intel CPU remains at lowest clock

JJone20
Beginner
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I have an Lenovo T440p with an Intel Core i5 4300M CPU. 8GB RAM, SSD running with Windows 7 (preinstalled).

The only thing I did not like about this laptop was the screen, which I replaced (the whole LCD unit - including the hinges) with a full-hd version. It was rather easy; I did not have to remove the CPU/GPU.

Recently I noticed is that the laptop has become really slow, especially running VMs. In task manager I can see that the CPU is many times at 100% on all cores. CPU-Z is reporting that the CPU is running at the lowest possible clock:

  • Core Speed: 798.85 MHz
  • Multiplier x8
  • Bus Speed 99.87 MHz
  • Core Voltage of 0.659 V

(full details at the end)

I have set Windows already to "Maximum Performance" in the energy settings. I have also taken out the battery and am running with the power adapter. I also set the Lenovo Power Manager to maximum performance. Sadly, no improvement.

What else can I try?

CPU-Z TXT Report ------------------------------------------------------------------------- Binaries ------------------------------------------------------------------------- CPU-Z version 1.72.1.x64 Processors ------------------------------------------------------------------------- Number of processors 1 Number of threads 4 APICs ------------------------------------------------------------------------- Processor 0 -- Core 0 -- Thread 0 0 -- Thread 1 1 -- Core 1 -- Thread 0 2 -- Thread 1 3 Timers ------------------------------------------------------------------------- ACPI timer 3.580 MHz HPET timer 14.318 MHz Perf timer 2.533 MHz Sys timer 1.000 KHz Processors Information ------------------------------------------------------------------------- Processor 1 ID = 0 Number of cores 2 (max 8) Number of threads 4 (max 16) Name Intel Core i5 4300M Codename Haswell Specification Intel(R) Core(TM) i5-4300M CPU @ 2.60GHz Package (platform ID) Socket 947 rPGA (0x4) CPUID 6.C.3 Extended CPUID 6.3C Core Stepping C0 Technology 22 nm TDP Limit 37.0 Watts Tjmax 100.0 °C Core Speed 799.0 MHz Multiplier x Bus Speed 8.0 x 99.9 MHz Stock frequency 2600 MHz Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, VT-x, AES, AVX, AVX2, FMA3, TSX L1 Data cache 2 x 32 KBytes, 8-way set associative, 64-byte line size L1 Instruction cache 2 x 32 KBytes, 8-way set associative, 64-byte line size L2 cache 2 x 256 KBytes, 8-way set associative, 64-byte line size L3 cache 3 MBytes, 12-way set associative, 64-byte line size FID/VID Control yes Turbo Mode supported, enabled Max non-turbo ratio 26x Max turbo ratio 33x Max efficiency ratio 8x O/C bins none Ratio 1 core 33x Ratio 2 cores 32x Ratio 3 cores 32x Ratio 4 cores 32x TSC 2596.8 MHz APERF 794.7 MHz MPERF 2581.1 MHz IA Voltage Mode PCU adaptive IA Voltage Offset 0 mV GT Voltage Mode PCU adaptive GT Voltage Offset 0 mV LLC/Ring Voltage Mode PCU adaptive LLC/Ring Voltage Offset 0 mV Agent Voltage Mode PCU adaptive Agent Voltage Offset 0 mV Temperature 0 55°C (131°F) [0x2D] (Core # 0) Temperature 1 59°C (138°F) [0x29] (Package) Power 0 11.12 W (Package) Power 1 1.54 W (IA Cores) Power 2 0.24 W (GT) Power 3 9.34 W (Uncore) Power 4 0.88 W (DRAM) Voltage 0 0.66 Volts (VID) Voltage 1 +0.00 Volts (IA Offset) Voltage 2 +0.00 Volts (GT Offset) Voltage 3 +0.00 Volts (LLC/Ring Offset) Voltage 4 +0.00 Volts (System Agent Offset)
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JJone20
Beginner
653 Views

Ok, i could fix the issue after some trail and error.

Turns out, if I take out the battery (even though plugged into the wall charger), the CPU will be throttled to minimum frequency. Sadly, there is no way to turn this off. So I have to leave the battery inside the laptop to get reasonable performance.

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JJone20
Beginner
654 Views

Ok, i could fix the issue after some trail and error.

Turns out, if I take out the battery (even though plugged into the wall charger), the CPU will be throttled to minimum frequency. Sadly, there is no way to turn this off. So I have to leave the battery inside the laptop to get reasonable performance.

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Allan_J_Intel1
Employee
653 Views

Good to hear your computer is working again.

Allan.

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