[TOOL] Lenovo (H20) Bios Unlocker and Locker

Thanks a lot for the answers. So, Can I changue the timings in the BIOS? And the RAM clock? I am more interested in the timings.

Doesn’t work on my Legion 5 - 15ACH6H (type 82JU, BIOS GKCN58WW) :frowning:

I would like to upgrade my RAM to Kingston Fury Impact 32GB [2x16GB 3200MHz DDR4 CL20 SODIMM]. Can someone tell me if that RAM will be working at 3200MHz without problem or 2666MHz only? (KF432S20IBK2/32 - single rank)

“This mod on the Legion 5 AMD 15ACH6H stops working from BIOS version GKCN53WW.”

And yes, I’ve had the same exact laptop with that Ram Nd it runs at 3200MHz CL20

on 4800H, both timing and clock editing work, I successfully ran my
4800H on stock kingston at 3600Mhz+ CL20-20-20-don’t remember (Stock are 3200Mhz CL22)

fantastic crack, you have helped me a lot. Happy New Year.

Thank you.

How can you compare stock 16GB RAM to this Kingstones? Is it worth 100$?

Doesn’t make enough difference to be worth, in my opinion.

I have Lenono legion 5i 17imh05h. bios efcn45ww. It will work?
In advanced Bios is possible to disable Nvidia grx 1660ti?


While mssing around the bios, i bricked my system, tried everthing from flash to disconecting all the batteries, etc. I would like the file for the spi flash. Here is my dump (8mb). S/N PF37HA9B
dump.zip (2.2 MB)

Lenovo Legion 5 15ACH6H Ryzen 7 5800H here. I have strong indications my
laptop has been Bootkit’ed. Would using this hack allow unfettered write access to the EC and Bios regions similar to using a SPI hardware flasher, i.e. to bypass any write protects on the bios and SPI flash regions?

Anyone with a similar model care to point me to where the bios chip is? I’m guessing I have to completely tear it down…

Legion 5 17ACH6H - GKCN49WW- 2xKingston Fury KF3200C20S4/16G Cl 20 - everything works