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Lenovo Support
support.lenovo.com › us › en › downloads › ds550052-bios-update-for-windows-10-64-bit-ideapad-gaming-3-15ach6
BIOS Update for Windows 10 (64-bit) and Windows 11 (64-bit)- IdeaPad Gaming 3-15ACH6 - Lenovo Support US
December 5, 2025 - WARNING !! Update this BIOS will reset the firmware TPM. Please turn off BitLocker or encryption before you update this BIOS. Or prepare Recovery key in advance if your system enabled BitLocker or an encryption.
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Reddit
reddit.com › r/gaminglaptops › accessing lenovo ideapad gaming 3 15ach6 advanced bios options
r/GamingLaptops on Reddit: Accessing Lenovo Ideapad gaming 3 15ACH6 Advanced BIOS options
February 17, 2023 -

Lenovo has been notorious of not allowing users to access advance bios settings, but recently I have found a way to access this options in the bios menu. I have only tested this on Lenovo Ideapad gaming 3 15ACH6. Steps are as follow:Step 1: Turn off you laptop completelyStep 2 : Press the power button to turn onStep 3 : Spam F2 to enter BIOS menuStep 4 : After entering BIOS, DO NOT PRESS ANYTHING EXCEPT THE FOLLOWING KEYS : Press Fn+R+N for 3 times.Step 5 : Press F10, then enter to save and exitStep 6 : Spam F2 again until you are in BIOSStep 7 : You should now see some hidden options, Enjoy!

WARNING: By doing this, you *may* void your warranty or damage your hardware. Make sure you know what you are doing before changing anything within the BIOS. I soft bricked my laptop twice when messing with the options. I am not responsible for any damage cause by accessing the advance optionsPersonally I only changes the cpu power profile to the 54W profile, along with the use of AATU(aka UXTU) I managed to increase the performance by quite a bit. CinebenchR23 score before tweaking was 8906, but after tweaking the score increased to 11233 while maintaining <95℃. There are options for RAM speed but I didnt use those because I am not familiar with them. I really dont understand why Lenovo have to limit this laptop so much and not give us any easy option to boost the performance, there are plenty of thermal headroom in this machine. And total power isnt a problem as the cpu can run at 50W with gpu at 90W for over 10 minutes without any problem(no throttling no thermal problem). Lenovo why?Credit : I saw this method from https://youtu.be/mmd4Sc5bVcIAATU/UXTU : https://github.com/JamesCJ60/Universal-x86-Tuning-Utility

Discussions

Flash Bios Lenovo Ideapad Gaming 3
Thank you so much! I was worried that the laptop would not be good, but I read this post and thought we should give it a chance. And it worked. I reinstalled an older bios since I couldn't get the bios file for the newer ones. More on reddit.com
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December 24, 2023
What latest Bios version for Lenovo Ideapad gaming 3.
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March 1, 2026
BIOS-not-working-in-my-Lenovo-ideapad-Gaming-3- ...
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March 21, 2023
Re:Lenovo Ideapad Gaming 3 Advanced BIOS
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Lenovo Support
support.lenovo.com › us › en › downloads › ds545103-bios-update-for-windows-10-64-bit-ideapad-gaming-3-15arh05
BIOS Update for Windows 10 (64-bit) - ideapad Gaming 3-15ARH05 - Lenovo Support US
This package provides BIOS Update and is supported on ideapad Gaming 3-15ARH05 and running the following Operating Systems: Windows 10 (64-bit)
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Lenovo Support
support.lenovo.com › us › en › downloads › ds554895-bios-update-for-windows-11-64-bit-ideapad-gaming-3-15iah7
BIOS Update for Windows 11 (64-bit) - IdeaPad Gaming 3 15IAH7, IdeaPad Gaming 3 16IAH7 - Lenovo Support US
This package provides BIOS Update and is supported on IdeaPad Gaming 3 15IAH7, IdeaPad Gaming 3 16IAH7 and running the following Operating Systems: Windows 11 (64-bit)
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GitHub
gist.github.com › c0m4r › 91d0ba66d443f6b7a4e2759bc31589a6
Update Lenovo ideapad Gaming 3 Laptop BIOS on Linux · GitHub
On the second stick, copy just the BIOS update file, i.e. h3cn46ww.exe for ideapad Gaming 3-15ACH6 (look for yours at https://pcsupport.lenovo.com/uu/en -> Browse Product -> Laptops -> Gaming Series Laptops).
Find elsewhere
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Reddit
reddit.com › r/lenovo › flash bios lenovo ideapad gaming 3
r/Lenovo on Reddit: Flash Bios Lenovo Ideapad Gaming 3
December 24, 2023 -

I made this post to help my fellow Brazilian friends. However, if you're interested, the link below directs to the original post that I used to create this tutorial.

https://github.com/nonkerdoob/SmokelessCPU-Guides/blob/main/Guides/BIOS/BIOS_CRISIS.md

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Tutorial de como fazer o Flash da BIOS do Ideapad Gaming 3 15ARH7 (talvez funcione em outros modelos).

>>>>OBS: OS LINKS DIRETOS SÃO PARA O MODELO 15ARH7<<<<

Vamos lá, estou fazendo esse tutorial pois passei um perrengue com o meu computador. Estva eu fuçando na "Advanced BIOS" do meu notebook e eu alterei uma configuração (não lembro qual) e quando o PC reiniciou ele deu tela preta.

Mais precisamente os sintomas eram:

  • Tela preta

  • Coolers giravam

  • Era possível sentir o calor do notebook funcionando

  • Era possível acender e apagar os leds do teclado

  • A luz de POST (led do caps lock) não acendia

Eu tentei entrar em contato com a Lenovo porém, como meu notebook foi comprado em outro país, me negaram assistência mesmo eu estando disposto a pagar por isso.

Após muito pesquisar e vasculhar diversos fóruns e reddits eu encontrei um tutorial no github

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Ferramentas necessárias:

InnoExtract: https://github.com/dscharrer/innoextract/releases

7zip: https://www.7-zip.org/download.html

UEFITool: https://github.com/LongSoft/UEFITool/releases

Link direto para UEFITool: https://github.com/LongSoft/UEFITool/releases/download/A68/UEFITool_NE_A68_win64.zip

HeX Editor: https://mh-nexus.de/en/hxd/

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OBTENDO A BIOS DO SEU NOTEBOOK:

Acessar o site da Lenovo: https://pcsupport.lenovo.com/

Navegar até a página de suporte do produto do seu notebook, no meu caso o Ideapad Gaming 3 15ARH7.

Uma vez na página siga para esse caminho: Drivers e Softwares >>> Atualizar Driver Manualmente >>> BIOS

Fazer o download do arquivo.

Link direto: https://download.lenovo.com/consumer/mobiles/jncn48ww.exe

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EXTRAINDO A BIOS

A maneira mais fácil para extrair a BIOS é executar o arquivo.

Clique em Next >> Aceite os termos >>> Next >>> Selecionar "Extract Only" >>> Extract

A pasta padrão é: "C:\Drivers\Flash\xxxxxxxxxx", onde o xxxxxxx é a pasta final.

Vá até a pasta, haverá um arquivo .exe dentro dela.

Clique com o botão direito e com o 7zip, mande extrair novamente (de preferencia em outro local, pois dá um erro de permissão)

Navegue até a nova pasta que você extraiu os arquivos

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IDENTIFICANDO A IMAGEM DA BIOS

Nesta pasta haverão aproximadamente 15 arquivos

No tutorial original ele diz para procurar por um arquivo cuja extensão é ".fd"

Ao fazer os passos acima, para o meu notebook esse arquivo não existia, porém, existia um arquivo ".rom"

Copie esse arquivo esse arquivo para outra pasta (o do meu note o arquivo se chama "HLG52208.rom")

No próximo passo, você irá descobrir o nome para renomear esse arquivo

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DESCOBRINDO O NOME DA SUA BIOS

Aqui eu apenas irei reproduzir o passo a passo do tutorial original

Abra o arquivo ROM no UefiTool

Procurar a cadeia de caracteres Unicode "PcdSmmDxe"

Haverá apenas um resultado: clique duas vezes sobre ele

Agora clique na seção bruta do e extraia-o como corpo "PcdSmmDxe"

Abra o arquivo extraído com o editor hexadecimal

Procurar a cadeia de caracteres UNICODE/UTF-16.bin

Haverá apenas uma partida

O fileName a ser usado está lá, neste caso, é , ignore o ponto, entre cada letra como é o preenchimento UTF16 (0x00 byte)EUCrisis.bin

>>>OBS: ESSE NOME PODE VARIAR, O DO MEU NOTEBOOK ERA JNCN.BIN<<<

Abaixo uma lista de possíveis nomes:

BIOS Type Crisis Name

EUCN EUCrisis.bin

BHCN BHCrisis.bin

H1CN h1cn.bin

GKCN gkcn.bin

KWCN kwcn.bin

JNCN jncn.bin

APÓS DESCOBRIR O NOME DA SUA BIOS, VOCÊ IRÁ RENOMEA-LA E TROCAR A EXTENSÃO PARA ".BIN" CASO SEJA OUTRA.

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CRIAR UM PEN DRIVE

Formate um pen drive em FAT32, GPT (O jeito mais fácil é usar o Rufus e criar uma imagem com o FreeDos, após isso, vá no pen drive e apague os arquivos)

Depois de formatado, copie a imagem ".bin" já com o nome correto para dentro do pen drive

No meu caso, o pen drive só contém um arquivo nele "jncn.bin"

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FLASH NA BIOS

Com o Note desligado e desconectado da tomada

Insira o pen drive

Aperte "FN + R" e segure (você irá segurar por uns 2 a 5 minutos)

Insira o cabo de energia no note e ligue o note (continue segurando "FN + R")

Você irá reparar que o note liga com o Led do botão power desligado

Quando você ouvir um beep (é alto) pode soltar as teclas "FN + R"

O computador irá ficar beepando por uns 5 a 8 minutos (pelo menos o meu)

Ele irá reiniciar sozinho (demora mais uns 5 minutos até aparecer a logo da Lenovo)

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CONCLUÍDO

Eu refiz esse compilado pois eu não encontrei nenhuma informação sobre como fazer isso corretamente na internet, ou então as informações estavam em inglês, ou incompletas.

Espero que isso facilite a sua vida

Todos os créditos para o autor original SmokelessCPU.

Caso queira fazer uma sugestão de melhoria no post, fique a vontade :)

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Reddit
reddit.com › r/lenovolegion › what latest bios version for lenovo ideapad gaming 3.
r/LenovoLegion on Reddit: What latest Bios version for Lenovo Ideapad gaming 3.
March 1, 2026 -

Hello, as the title I'm currently using an Ideapad Gaming 3 laptop and I'm experiencing some errors that are causing my computer to display a blue screen. I've asked around and they say it's due to Windows switching between the graphics card when it's idle and when it's active. I checked on PC Support and only found the FCCN21WW version from 2024 onwards before that I was using FCCN10WW. I want to ask if this is the latest version? Thank you.

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Win-Raid
winraid.level1techs.com › bios/uefi modding › bios modding/flashing tools
[Request] Unlocked Lenovo Ideapad Gaming 3 15IMH05 BIOS - BIOS Modding/Flashing Tools - Win-Raid Forum
November 29, 2025 - hi guys! Can someone help with my BIOS? I want to unlock the advanced options in BIOS on the laptop Lenovo Ideapad Gaming 3 15IMH05. im currently on the EGCN41WW
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Reddit
reddit.com › r/lenovo › how to unlock advanced bios on an ideapad gaming 3 15imh05 81y4?
r/Lenovo on Reddit: How to unlock advanced bios on an Ideapad gaming 3 15IMH05 81Y4?
May 30, 2023 -

Bios: EGCN36WW
(Had seen an newer version, 40ww on support.lenovo.com, but Vantage doesn't seem to recommend it when searching for updates)

I had read somewhere on the net that there are power saving options that maybe available in the advanced bios. Planning to take a look at the options and try them if they are safe.

I have tried the Fn + R+ N (x3) option after pressing F2(ending up in the screen with the option to change the boot order of drives). Have also tried it after clicking on more settings there and entering the bios settings.

Thanks in advance.

Top answer
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If the methods floating around the internet don't work, it's likely the option is disabled on your model. Most Lenovo laptops have it disabled. As for power saving options, you're better off using Throttlestop to change your power targets and boost behaviour or something like QuickCPU to modify your Windows power plan settings. Do your research before you attempt either method.
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Hi, u/Ashenthen . We apologize for the delayed response. Here's the link on how to go to BIOS https://lnv.gy/43v3Y8o If you have the BIOS version updated (to update BIOS, download it using this link: https://lnv.gy/43vk7ea ) and see that there is no option for advanced bios settings, then it means that it is not meant for users so it is not available for access as intended. Your machine's BIOS is a standard BIOS for consumers, hence, there is no option at all nor any kind of configuration that you can access any advanced tab. In your case, there are no advance BIOS settings. However, If you still wish to proceed o have advanced BIOS settings. You need to get these instructions from a 3rd party website like the ones discussed in the Community Forums as using a modeled BIOS will void your warranty. We do not support BIOS configuration for the advance option. You may view this link for instructions https://lnv.gy/3OYc2tM If you are after power-saving options, Aside from Battery conservation mode in Lenovo Vantage. You may try this guide as well https://lnv.gy/42yB31L . Hope this helps. You can message us anytime if you have any other issues. Thanks! Kate_Lenovo
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Win-Raid
winraid.level1techs.com › bios/uefi modding › bios modding requests
[Request] Unlocked Lenovo Ideapad Gaming 3 15IMH05 - BIOS Modding Requests - Win-Raid Forum
December 23, 2020 - Hello, friends! Can someone help with this? I need unlock bios on the laptop Lenovo Ideapad Gaming 3 15IMH05. The latest version bios of EGCN29WW, you can download it from the link: link Result of write bios of FPT: FPT Operation Passed.