Bios Mods -The Best BIOS Update and Modification Source

I managed to update microcode for CPU 206A7 (Sandy Bridge) from Rev 1B to Rev 29


It may or may not let your Lenovo work with the i5-2520M but at least its updated.

I have attached it below, run flash.bat in DOS

Please report back

PS, @1234s282, it is VERY easy to update microcode.

Simpy open the BIOS in UEFITool then press Ctrl + F to search, type "A7 06 02 00" in the hex tab, extract that module, update its microcode then rebuilt with UEFITool.

DO NOT Hex Edit the actual ROM file as it will invalidate the checksum (Resulting in a brick) but UEFITool corrects the checksum when you modify a module.

Thanks for the heads up - turns out I didn't have UEFITool! - Doh!

Yeah UEFITool is great!

Unfortunately did not boot with the modified BIOS
Anything else I could try?

Lenovo documentation says that the following CPUs should be supported:

i7-2820QM
i7-2720QM
i7-2630QM
i7-2620M
i5-2540M
i5-2520M
i5-2410M
i3-2310M

Which one would be safest without unsupported versions? Some of these are a bit difficult to find in Europe, though.

Although its not stated, you should be able to run ivy bridge CPU's (3rd gen) as its the same socket

I'd recommend the i5-3210m or i7-3612QM

It maybe that the CPU you have is to high a wattage, make sure its the same

Try this mod at own risk, this should allow you to use Ivy Bridge CPU's, might also allow your 2520m to work - I have implemented my own Lenovo's microcode module, so it should add:

Sandy Bridge (i3/i5/i7-2***)
Ivy Bridge (i3/i5/i7-3***)

Please report back

Regards

Well. I flashed this SandyIvy BIOS and the system does not boot any more with the Celeron B810. I guess it should.

Yes, so now Ivy bridge CPU's should now work, It WILL work with i5-3210M as that is the CPU in my Lenovo, but any ivy bridge CPU should do

i5-2520M does not boot either. You say Ivy bridge should do?