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Lenovo Y500 GPU battery problem

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Hello everybody,

I have problem. When i plug out DC jack from my y500, gpu underclocks down to 135Mhz even if i set High performance. I sometimes want to play a game on battery, but almost any game is lagging due this problem.

Thank you for your help.

Vratislav Rusz

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Hello everybody,

I have problem. When i plug out DC jack from my y500, gpu underclocks down to 135Mhz even if i set High performance. I sometimes want to play a game on battery, but almost any game is lagging due this problem.

Thank you for your help.

Vratislav Rusz

It's normal.

Battery can't provide enough power to GPU so GPU down clock itself by default when you're on battery and if you force the GPU to run at full speed on battery, it's likely that you notebook will shut off or your battery will be fried or explode.

Well if you want to force it. I used to see someone post that you can use nvidia inspector to force it.

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It's normal.

Battery can't provide enough power to GPU so GPU down clock itself by default when you're on battery and if you force the GPU to run at full speed on battery, it's likely that you notebook will shut off or your battery will be fried or explode.

Well if you want to force it. I used to see someone post that you can use nvidia inspector to force it.

Battery doesn't last very long at all if you are doing anything intensive anyhow......almost have to have it plugged in to do anything worthwhile.

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As everyone said before, it's just a matter of the GPU(s) just take too much power to even warrant using the battery.

I'm wanting to update to the custom BIOS so that I can use the integrated graphics while I'm on battery.

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As everyone said before, it's just a matter of the GPU(s) just take too much power to even warrant using the battery.

I'm wanting to update to the custom BIOS so that I can use the integrated graphics while I'm on battery.

Modded BIOS won't give you access to iGPU, it's locked out at the hardware level.

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As far as i know, it should be possible to utilize the GPU at full power while using the battery. Might cause more heat, and shorten its lifetime, but it should be possible. Im about to try it aswell.

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As far as i know, it should be possible to utilize the GPU at full power while using the battery. Might cause more heat, and shorten its lifetime, but it should be possible. Im about to try it aswell.

It's not possible on this laptop. You can overclock the lower P-states a bit in Nvidia Inspector but you'll never get full power on battery.

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True, the only workaround i found is: Purchasing a external battery, to charge the laptop. That way, it works. But that requires a external battery :D

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What if we made an adaptor to connect the battery via the dc Jack port? I know the laptop can run on charger without battery in, but not sure if the battery would have enough juice to power it through that jack.

RB8720

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i am an owner of Y400, and i can say that i tried tons of way to overcome the automatic throttling GPU from battery but none ever works. You can only control the CPU via the power management but not the GPU. Hope that help.

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So how does the laptop determine to throttle or not. By voltage supply available? I'll right up a test adapter and see how it works.

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