Bios old version


salim

salim

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windows 11
Hello,
I am looking for an old BIOS version for the Lenovo Legion 7-15IMH05. On Lenovo's official site, I only see the latest BIOS version.
However, I need the old BIOS version in order to undervolt my laptop.
I have searched the internet, but unfortunately, I couldn’t find anything.
Could you perhaps help me?
Thank you in advance!
 
Windows Build/Version
Windows 11

My Computer My Computer

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windows 11
OS
windows 11
Computer type
Laptop
If it's not available on Lenovo site, even if I found it elsewhere, I would hesitate to use it. It's up to the OEM whether a bios is downgradable or not, and some of them are not. If a particular bios addressed a security DSA, usually the OEM prevents it from being downgraded to an earlier bios version. You might contact Lenovo but I wouldn't hold my breath expecting them to help since the last bios listed is dated 10/22.

May I ask what your need is to undervolt.
 

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glasskuter said:
If it's not available on Lenovo site, even if I found it elsewhere, I would hesitate to use it. It's up to the OEM whether a bios is downgradable or not, and some of them are not. If a particular bios addressed a security DSA, usually the OEM prevents it from being downgraded to an earlier bios version. You might contact Lenovo but I wouldn't hold my breath expecting them to help since the last bios listed is dated 10/22.

May I ask what your need is to undervolt.
Click to expand...
Thank you for your message and information.
I want to undervolt my CPU because I want to make it more efficient and faster, and also to lower the CPU temperature.
 

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windows 11
OS
windows 11
Computer type
Laptop
salim said:
I want to undervolt my CPU because I want to make it more efficient and faster, and also to lower the CPU temperature.
Click to expand...

Please post references about CPU efficiency and speed in relationship to voltage.

What method had you used in the attempt to undervolt?

What was the error message?

How do you know that an older BIOS version will allow you to do what you're seeking?


 

My Computer My Computer

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Windows 10Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz16 GB Total: Manufacturer : Samsung MemoryTyp...NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
OS
Windows 10
Computer type
Laptop
Manufacturer/Model
HP
CPU
Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
Motherboard
Product : 190A Version : KBC Version 94.56
Memory
16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
Graphics Card(s)
NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
Sound Card
IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
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Model Hitachi HTS727575A9E364
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Microsoft Defender
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Mobile Workstation
Lenovo will stop listing older BIOS files on their support page, but they're still available if you know the filename.

For example:
Code: 
https://download.lenovo.com/consumer/mobiles/egcn27ww.exe
https://download.lenovo.com/consumer/mobiles/egcn29ww.exe
https://download.lenovo.com/consumer/mobiles/egcn34ww.exe
https://download.lenovo.com/consumer/mobiles/egcn39ww.exe
 

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Windows 7
OS
Windows 7
salim said:
I want to undervolt my CPU because I want to make it more efficient and faster, and also to lower the CPU temperature.
Click to expand...
Have you considered opening the laptop, cleaning all dust from vents and fan and replace thermal paste on cpu.The paste does harden over time causing it to run hotter.
 

My Computers My Computers

System One System Two

  • At a glance

    Windows 11 Pro 25H2 26200.8655i9-10900 10 core 20 threads32 gbnone-Intel UHD Graphics 630
    OS
    Windows 11 Pro 25H2 26200.8655
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 7080
    CPU
    i9-10900 10 core 20 threads
    Motherboard
    DELL 0J37VM
    Memory
    32 gb
    Graphics Card(s)
    none-Intel UHD Graphics 630
    Sound Card
    Integrated Realtek
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    2x1tb Solidigm m.2 nvme /External drives 512gb Samsung m.2 sata+2tb Kingston m2.nvme
    PSU
    500w
    Case
    MT
    Cooling
    Dell Premium
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    so slow I'm too embarrassed to tell
    Browser
    #1 Edge #2 Firefox
    Antivirus
    Defender+MWB Premium

  • At a glance

    Windows 11 Pro 24H2 26200.8457AMD Ryzen 7 6800U32 gbintegrated
    Operating System
    Windows 11 Pro 24H2 26200.8457
    Computer type
    PC/Desktop
    Manufacturer/Model
    Beelink Mini PC SER5
    CPU
    AMD Ryzen 7 6800U
    Memory
    32 gb
    Graphics card(s)
    integrated
    Sound Card
    integrated
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Crucial nvme
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    still too embarrassed to tell
    Browser
    Firefox
    Antivirus
    Defender
    Other Info
    System 3 is non compliant Dell 9020 i7-4770/24gb ram Win11 PRO 26200.8457
Only reason you can't find old version of BIOS is because you will have trouble downgrading BIOS firmware version from newest to old.
 

My Computer My Computer

At a glance

Windows 11AMD Ryzen 7 5700GMicron Technology DDR4-3200 16GBNVIDIA GeForce RTX 3060
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1
garlin said:
Lenovo will stop listing older BIOS files on their support page, but they're still available if you know the filename.

For example:
Code: 
https://download.lenovo.com/consumer/mobiles/egcn27ww.exe
https://download.lenovo.com/consumer/mobiles/egcn29ww.exe
https://download.lenovo.com/consumer/mobiles/egcn34ww.exe
https://download.lenovo.com/consumer/mobiles/egcn39ww.exe
Click to expand...

How do you find the file names for non-displayed BIOS versions each time that another Lenovo computer is checked?
 

My Computer My Computer

At a glance

Windows 10Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz16 GB Total: Manufacturer : Samsung MemoryTyp...NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
OS
Windows 10
Computer type
Laptop
Manufacturer/Model
HP
CPU
Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
Motherboard
Product : 190A Version : KBC Version 94.56
Memory
16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
Graphics Card(s)
NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
Sound Card
IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
Hard Drives
Model Hitachi HTS727575A9E364
Antivirus
Microsoft Defender
Other Info
Mobile Workstation
FreeBooter said:
Only reason you can't find old version of BIOS is because you will have trouble downgrading BIOS firmware version from newest to old.
Click to expand...
Wrong. I have successfully downgraded Lenovo BIOS'es before. You have to disable a BIOS setting which only allows installing a newer firmware. There are BIOS enthusiast sites, and even Tom's Hardware threads that cover in more detail the process. In some instances you can't go directly back a step, but you must first flash a much older version before moving up to another version in the release history.
 

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Windows 7
OS
Windows 7
garlin said:
Wrong. I have successfully downgraded Lenovo BIOS'es before. You have to disable a BIOS setting which only allows installing a newer firmware. There are BIOS enthusiast sites, and even Tom's Hardware threads that cover in more detail the process. In some instances you can't go directly back a step, but you must first flash a much older version before moving up to another version in the release history.
Click to expand...
What setting did you disabled?
 

My Computer My Computer

At a glance

Windows 11AMD Ryzen 7 5700GMicron Technology DDR4-3200 16GBNVIDIA GeForce RTX 3060
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1
zbook said:
How do you find the file names for non-displayed BIOS versions each time that another Lenovo computer is checked?
Click to expand...
Lenovo has a standardized scheme for naming their driver or download files, and will increment the version number. Occasionally, they will switch entire filenames.

I'm assuming if the OP knows enough that they need to downgrade, they've found an article on a BIOS enthusiast forum explaining which file to use. My point is most Lenovo users don't realize the download files are still there, just no longer referenced.
 

My Computer My Computer

At a glance

Windows 7
OS
Windows 7

My Computer My Computer

At a glance

Windows 11AMD Ryzen 7 5700GMicron Technology DDR4-3200 16GBNVIDIA GeForce RTX 3060
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1
garlin said:
Lenovo has a standardize scheme for naming their driver or download files, and increments the version number. Occasionally, they will switch entire filenames.

I'm assuming if the OP knows enough that they need to downgrade, they've found an article on a BIOS enthusiast forum explaining which file to use.
Click to expand...

When BIOS versions are viewed the older versions / history are very easily found for HP.
Dell, Asus, AsRock, MSI, etc. are readily available.
Lenovo is often not displayed.

What websites do you use to find them?
 

My Computer My Computer

At a glance

Windows 10Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz16 GB Total: Manufacturer : Samsung MemoryTyp...NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
OS
Windows 10
Computer type
Laptop
Manufacturer/Model
HP
CPU
Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
Motherboard
Product : 190A Version : KBC Version 94.56
Memory
16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
Graphics Card(s)
NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
Sound Card
IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
Hard Drives
Model Hitachi HTS727575A9E364
Antivirus
Microsoft Defender
Other Info
Mobile Workstation
I start by searching the Lenovo community forums, Tom's Hardware and then BIOS mod sites. Lenovo likes to pretend no other BIOS versions exist. Usually someone remembers which one of the older versions to use. It's hit or miss, but better than nothing.

After you find the missing filename, the URL's are under the same path.
 

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Windows 7
OS
Windows 7
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