Laptop switches from 165 hertz to 60 hertz randomly when unplugged

[primal arch]

Model: Lenovo - Legion Slim 5 16" Gaming Laptop WQXGA - Ryzen 7 7840HS with 16GB Memory - NVIDIA GeForce RTX 4060 8GB - 512GB SSD

Describe the issue: Whenever my laptop is unplugged, it randomly switches from 165 hertz to 60 hertz, and I can tell by my eyes when looking at the cursor move across my screen, and even in video games I can tell as well. However, when the laptop is plugged I always get 165 hertz, no problems at all. This has not been a problem in the past, all the sudden it's a problem now. I've had this laptop for 6 months and now it has this annoying problem. My FPS does not drop when playing video games, only the hertz change and makes the screen look choppy.

What have you tried already: I already set the windows settings refresh rate to 165, my nvidia control panel power management mode and preferred refresh rate are both at highest performance, I changed my power plan to CoreVeeAir (Khorvie Tech on youtube) which is reliable and should give me the highest performance plan possible. My GPU mode is in dGPU Mode in lenovo vantage.

When did it start producing the issue: Started two days ago, this has never happened before and have tried effortlessly to solve this problem.

Did you install new drivers or software?: All my drivers and software is up to date, I even went on the lenovo website and checked if my bios needed updates and no updates were needed. I checked windows, nvidia, lenovo vantage, all possible software and they are all up to date.

[primal arch]

This is a feature. It’s going to automatically swap to 60 hertz when on battery. Just change it back if you don’t like it.

[fathom grail]

it's actually dropping to 70Hz
the nvidia driver is forcing desktop VRR even if it is disabled elsewhere.
either switch to hybrid mode and use the iGPU, or create a custom refresh rate with CRU e.g. 160Hz that won't use VRR

how much battery life are you even getting with a max perf plan

[primal arch]

this is not normal, it has never been like this when gaming. You didn’t read my post, I said it’s 165 hertz no matter what when on battery.

[primal arch]

I only get like 1 hour 30 minuets when unplugged and not gaming, but the power plan isn’t the issue

[primal arch]

I can’t use hybrid mode because it caps my fps in some games, it’s really bad and i’ve tested iGPU vs dGPU, and dGPU gives a massive fps boost and uncaps fps too

[fathom grail]

what fps are you expecting on battery?
make the custom 160Hz refresh rate then

[primal arch]

i’m expecting good performance on battery, on roblox with iGPU I was capped at 800 fps, then with dGPU I was getting a solid consistent 2.5k fps

[fathom grail]

800 FPS what the hell, this is literally indistinguishable from 2500 FPS on the same refresh rate screen, and iGPU gives you higher refresh rates

you are already getting outstanding performance with the iGPU, the dGPU is overkill for this roblox game

anyways the 160Hz trick works on my end, in case you play a more demanding game on battery.

(any custom refresh rate works. you can use 144Hz if you want a "standard" refresh rate, or 164Hz if you really want to max out frames without triggering desktop VRR)

your monitor's timings may differ. i set timing to CVT-RB, set 160Hz, and then manually changed sync polarity to (-/-)

in my personal opinion, you will get the best battery + performance balance by using the iGPU + capping FPS to 158FPS or lower. slightly more latency but perfect freesync framepacing with 80% less GPU usage

[primal arch]

Too bad it is. Don’t game in battery. Use hybrid mode on battery. There is nothing wrong here. You are trying to use the machine not how it’s intended to be used.

[primal arch]

It literally isn't, tell me why I didn't get this problem when I first got this laptop?