ANV15-51 Problem with i5 13420h throttling for no reason

The problem is quite easy to detect, I simply start playing anything and after a certain amount of minutes, about 2 or 3, the CPU simply locks at 30W or less. The clocks drop to 3200 or 3000MHz and the CPU doesn't have extravagant temperatures, mostly 70 degrees, and before making the sudden drop it works at about 78-80 degrees while playing, which is a normal temperature and is fully functional. I've tried everything to solve it and nothing. I wanted to know if it could be a problem with the charger. The original is 135W and maybe it can't supply all the power needed by both the CPU and graphics, which are about 60W and 75W separately.

Together, the most I've seen they reach is 30W and 70W, so I also thought they would be limited to a combined consumption of 100W, which is stupid because it's impossible, I can't take advantage of the capacity. Please, I need help with this now. I don't know what else to do and it's very ANNOYING, I've updated the BIOS and I've done everything and nothing solves the problem.

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hanzel0208

Note and emphasize that the performance loss is HUGE, removing the E cores helps but it still locks at 30w and after a while the performance is also reduced, is there any way to solve this forever without having to fiddle with throttlestop every so often or having to disconnect and connect the charger for it to restart and the cpu returns to its normal state

unclewebb

Post a screenshot of the ThrottleStop TPL window so I can see your settings.

Clear the Disable Controls box and check the MMIO Lock box in the TPL window. This can help with some power limit throttling problems. Turn on the ThrottleStop Log File option so you have a record of your computer's performance and any reasons for throttling. You can copy and paste the log file data to,

www.pastebin.com

Diya1811

Ensure your laptop is set to High Performance in Power Options to prevent unnecessary power limitations. Check PredatorSense or Acer Control Center for any settings restricting CPU or GPU performance. Observe your charger’s behavior during demanding tasks to see if it overheats or fails to provide stable power. If the problem persists, contact Acer Support, especially if your laptop is under warranty, for further diagnosis or replacement options.

Click on "Yes" if it answers your question or Click on "Like" if you find my answer useful

hanzel0208

https://community.acer.com/en/discussion/comment/1337346#Comment_1337346

I have made my CPU work at a maximum of 50w to avoid overheating, but at a certain point in gaming it simply locks at 30w. I have seen that it is a common problem in these laptops but I do not know how to give it a definitive solution, locking the TPL in throttlestop helps and improves something, but it is quite annoying since sometimes I have to restart the pc several times. I have also realized that from yesterday to today a new mode has appeared in nitrosense called turbo. I have put it and it has not trothled the cpu but I do not know if it is because of throttlestop or because of the turbo mode.

hanzel0208

https://community.acer.com/en/discussion/comment/1337346#Comment_1337346

I restarted the laptop and the turbo mode disappeared hahaha

Axxo

Resolution

Make sure that the thermal solution being used is compatible and correct for the specific CPU. ...
Verify proper installation of the processor thermal solution. ...
Make sure to apply the right amount of thermal interface material (TIM).
Check system fan operation.
Check air ventilation.

hanzel0208

https://community.acer.com/en/discussion/comment/1337402#Comment_1337402

For example on this case with e cores activated the CPU is chill, is only using 20w, I have to disconnect and connect the charger to see an improvement on cpu performance

And as you can see here am almost Lossing a 30%

hanzel0208

The only way I managed to solve the problem was to disconnect and connect the charger; otherwise, it is impossible to solve it. That's why I asked if it could be a bad decision on Acer's part to provide a 135W power supply from the factory with these laptops.

hanzel0208

The other thing is, after I unplug and plug in the charger, the laptop starts to run at full power, and I start to lose charge.

Anyway, I'm thinking of ordering a 180W charger and repasting the CPU to avoid the 88 degrees it reaches at full power, and see if I can fix this.

Nicolaship

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!

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