Acer Nitro V 15 ANV15-51 CPU runs at 0.40 GHz on battery, extremely low performance

Ibo_Can
Ibo_Can Member Posts: 2 New User
edited July 23 in Nitro Gaming
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I'm using the Acer Nitro V 15 ANV15-51. My computer was working as it should a week or so ago, but for the past week, my processor has been running at a constant 0.40 GHz while on battery. Knowing my computer's specifications, I know it should perform better, but I can't use it.

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[Edited the thread to add model name to the title]

Answers

  • Puraw
    Puraw ACE, Member Posts: 18,640 Trailblazer

    Hi Ibo_Can,

    What you're seeing is expected behavior for the Nitro V 15 ANV15-51. The CPU base speed of 2.4 GHz is normal, and the drop to ~0.39 GHz on battery is part of Acer’s aggressive power-saving strategy. This helps extend battery life but severely limits performance — especially on gaming laptops like this one.

    💡 Important Tip: For optimal performance, especially during gaming or heavy workloads, always keep the power adapter connected and ensure the battery is fully charged to 100%. Running solely on battery will throttle the CPU and GPU, making the system feel sluggish.

    This behavior is consistent across Nitro models and is not a defect — it’s by design to preserve battery health and reduce heat.

    Let us know if you’re seeing performance drops even while plugged in — that could point to a different issue like thermal throttling or power delivery limits.

  • Ibo_Can
    Ibo_Can Member Posts: 2 New User

    Hi,

    the problem isn't that it's 0.38 GHz, but that it stays constant at that speed. For example, when I open a browser, I can't navigate pages at normal speed, or programs open five times slower. As you can see, I'd expect a performance improvement based on usage, but it doesn't.

  • AmmadKhan
    AmmadKhan Member Posts: 3 New User

    This issue likely stems from Windows power management settings or a NitroSense configuration locking the CPU in a low-power state to conserve battery, which can happen after a Windows or driver update. For a touchcric-inspired fix to boost your CPU back to its full potential, go to Settings > System > Power & battery > Power mode and set it to Best performance while on battery, then open NitroSense and ensure Turbo or Performance mode is enabled instead of Eco mode. Additionally, update your BIOS and chipset drivers from Acer’s support site for the ANV15-51, and in Device Manager, check under Processors to ensure no driver conflicts are throttling performance. If the issue persists, reset the battery power plan by running powercfg /restoredefaultschemes in Command Prompt (admin mode) and test again.

  • Nicolaship
    Nicolaship Member Posts: 9

    Tinkerer

    There are some BIOS settings that can be changed AT YOUR OWN RISK.
    I have an ANV15-51-57WS and was experiencing many FPS drops. With the help of AI, I checked for possible BIOS tweaks to improve performance, since all other attempts had failed. I’ll leave the changes here in case you want to try them.

    BIOS CHANGES CAN CAUSE INSTABILITY OR RENDER YOUR DEVICE USELESS. RESEARCH AND ASSESS THE RISKS. IF YOU TRY, DO IT AT YOUR OWN RISK!

    Note: My current BIOS version is 1.14. LOOK FOR REFERENCE VALUES FOR YOUR OWN DEVICE.

    1. Power / Turbo

    • Intel® SpeedStep → Enabled (allows dynamic frequency adjustment)
    • Turbo Mode → Enabled (keeps turbo, but will be limited by TDP)
    • Platform PL1 Enable → Enabled – set PL1 = 35 W
    • Platform PL2 Enable → Enabled – set PL2 = 45 W
      (these values limit heat and power; default may exceed 64 W)
    • Power Limit 4 Override → Disabled
    • Config TDP Configurations → Nominal
    • Boot Performance Mode → Max Battery or Max Non-Turbo Performance (prevents spikes at boot)

    2. Thermal Control (TCC / PROCHOT)

    • TCC Activation Offset → 15 (throttling starts at ~85 °C)
    • TCC Offset Clamp Enable → Enabled
    • TCC Offset Lock Enable → Disabled
    • Bi-directional PROCHOT# → Disabled (prevents GPU from throttling CPU and vice versa)
    • Disable PROCHOT# Output → Enabled (CPU doesn’t send signal to other devices)
    • Disable VR Thermal Alert → Disabled
    • PROCHOT Response → Fast
    • ACPI T-States → Enabled

    3. Core and State Management

    • Active Performance-cores → All active (not worth disabling P-cores for gaming)
    • Active Efficient-cores → All active (E-cores help light multitasking without much heat)
    • Hyper-Threading → Enabled
    • C-States → Enabled
    • Enhanced C-States → Enabled
    • C-State Auto Demotion / Un-demotion → Enabled
    • Package C-State Limit → C8 (saves power without stalling CPU response)
    • C6/C7 Short Latency → Default (do not reduce)
    • C6/C7 Long Latency → Default

    4. Prefetch / Efficiency

    • Hardware Prefetcher → Enabled
    • Adjacent Cache Line Prefetch → Enabled
    • Intel® Speed Shift Technology → Enabled
    • Per Core P-State OS Control Mode → HwP Autonomous
    • HwP Autonomous EPP Grouping → Enabled
    • HwP Lock → Disabled

    5. Extras / Security

    • Intel Virtualization Technology → Enabled (does not affect thermal performance)
    • Intel Trusted Execution Technology → Disabled (slight latency gain)
    • AES → Enabled
    • MachineCheck → Enabled
    • PCH Energy Reporting → Enabled
    • PCH Cross Throttling → Disabled (prevents chipset from forcing CPU throttling)

    Practical Effects

    • Reduced power limit → less heat and fewer FPS drops due to thermal throttling
    • Thermal offset ensures CPU never exceeds ~85 °C but keeps turbo active while there’s margin
    • C-States and Speed Shift active → much lower consumption and heat at idle and light loads
    • Prefetchers active → maintains high performance in games and heavy apps
    • Isolated PROCHOT → GPU and CPU don’t throttle each other
    • Active Trip Point 0 → 50 °C / 40–50%
    • Active Trip Point 1 → 65 °C / 75–80%
    • Passive Trip Point → 82–85 °C
    • Passive TSP → 2 s
    • Alert Enable Lock → Disabled (allows adjustments in Windows if needed)

    This makes the fan kick in earlier and prevents the CPU from overheating before it reacts, which helps a lot when you’re already limiting clock and voltage.

    If you want better control of PL1/PL2, you can try ThrottleStop.

    AND ONCE AGAIN, BIOS CHANGES CAN CAUSE INSTABILITY OR RENDER YOUR DEVICE USELESS. RESEARCH AND ASSESS THE RISKS. IF YOU TRY, DO IT AT YOUR OWN RISK!

  • Axxo
    Axxo Member, Ally Posts: 2,271

    The Acer Nitro V 15 (ANV15-51) CPU running at 0.40 GHz on battery is likely due to power management settings, specifically intended to conserve battery life. However, this low clock speed can significantly impact performance. To address this, try adjusting the power mode in Windows settings to "Best performance" while on battery and ensure NitroSense is set to Turbo or Performance mode. Also, check for BIOS and chipset driver updates from Acer's support site and verify there are no driver conflicts in Device Manager.

    Here's a more detailed breakdown of potential solutions:
    1. Power Management Settings:
    Windows Power Mode:
    Navigate to Settings > System > Power & battery > Power mode and set it to "Best performance" while on battery.
    NitroSense:
    Open NitroSense and ensure the mode is set to "Turbo" or "Performance" rather than "Eco" mode.
    2. Driver and BIOS Updates:
    BIOS Update: Check for and install any available BIOS updates from Acer's support website for the ANV15-51, as they may include performance improvements.
    Chipset Drivers: Update chipset drivers from Acer's support site as well.
    Device Manager: In Device Manager, under "Processors," check for any driver conflicts that might be throttling performance.
    3. Other Potential Issues:
    Charger:
    A 45W charger might be insufficient, and using a 90W or 180W charger might improve performance, says Acer Community.
    Battery Health:
    If the battery is old or failing, it may not be able to provide enough power, even when plugged in, and the system might throttle performance to compensate. Consider checking the battery's health or replacing it if necessary.
    Background Apps:
    Reduce the number of background apps, especially those that consume significant resources, as they can impact CPU performance.
    Power Plan Reset:
    Reset the battery power plan in Command Prompt (admin mode) using the command powercfg /restoredefaultschemes, according to Acer Community.
    4. Troubleshooting Steps:
    Test on Battery:
    Try running the laptop on battery power with the power management settings set to "Best performance" and NitroSense in "Turbo" mode. If the issue persists, it's likely not solely related to power management.
    Test While Plugged In:
    Plug the laptop into the charger and see if the CPU clock speed increases. This can help isolate whether the issue is related to the battery or the power supply.
    Monitor CPU Usage:
    Use Task Manager or a monitoring tool to see if any specific processes are consuming excessive CPU resources, which could be causing the slowdown.
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