Updated 09/20/18
my rig:Dell Precision M6700 with i7-3940XM
Finally got Flash Descriptor Region unlocked as I intended after month long researching,which means i have full BIOS dump now.
Here is the problem
1:i believe this BIOS is somehow protected by some sort of checksum or signature verification,which cause me failed when trying to manipulate CPU multiplier by GRUB NVRAM settings.
could someone pls help me disable or get rid of such things metioned above?
2:i've read some thread about enable overclocking on ThinkPad W530 by"prevent MSR 0x194 Bit 20 set to 1".TBH i dont really understand what does it mean,but i'll just paste it here if this rings a bell for experienced bios hacker :)
https://www.bios-mods.com/forum/Thread-R...removal-special
full bios dump downthere,afaik this is an AMI UEFI non-standard BIOS,we need UEFITool or PhoenixTool to do anything with it.
Thanks for any help in advance and have a nice day.

EDIT by Fernando: Thread title customized (was too long and not meaningful enough)

To Fernando:I tried to make the title more specific :)

updated 09/20/18

Here, all three of these changed from default enabled to disabled - flash back using programmer only (Due to lock in place currently)
Otherwise you will have to change SMI + BIOS Lock via grub to 0x0 first, then flash from windows using FPTw.exe -bios -f filename.bin

SMI Lock, VarStoreInfo (VarOffset/VarName): 0x3F >>> Disabled
BIOS Lock, VarStoreInfo (VarOffset/VarName): 0x40 >>> Disabled
BIOS Interface Lock, VarStoreInfo (VarOffset/VarName): 0x42, >>> Disabled << This one locks the BIOS settings


http://www.filedropper.com/dellm6700-mod-removelocks


This is AMI Aptio IV (4) BIOS, but strings are messed up, probably on purpose, that is why you can't edit with AMIBCP

Zitat von Lost_N_BIOS im Beitrag #3

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Here, all three of these changed from default enabled to disabled - flash back using programmer only (Due to lock in place currently)
Otherwise you will have to change SMI + BIOS Lock via grub to 0x0 first, then flash from windows using FPTw.exe -bios -f filename.bin

SMI Lock, VarStoreInfo (VarOffset/VarName): 0x3F >>> Disabled
BIOS Lock, VarStoreInfo (VarOffset/VarName): 0x40 >>> Disabled
BIOS Interface Lock, VarStoreInfo (VarOffset/VarName): 0x42, >>> Disabled << This one locks the BIOS settings


http://www.filedropper.com/dellm6700-mod-removelocks


This is AMI Aptio IV (4) BIOS, but strings are messed up, probably on purpose, that is why you can't edit with AMIBCP

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Those are not for CPU multiplier. CPU itself lock the amount it can raise up to, BIOS usually does not lock this lower than CPU default.
Main one I changed, last one, should allow you to change BIOS settings now, possibly, but maybe not since we cannot edit in AMIBCP CPU multiplier setting. But main thing is CPU max multi is max multi, no matter what you do.

If you can find BIOS String file, then remove string that is over 400 bytes, and put back, then you should be able to properly open BIOS in AMIBCP 4.55

Zitat von Lost_N_BIOS im Beitrag #5

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Those are not for CPU multiplier. CPU itself lock the amount it can raise up to, BIOS usually does not lock this lower than CPU default.
Main one I changed, last one, should allow you to change BIOS settings now, possibly, but maybe not since we cannot edit in AMIBCP CPU multiplier setting. But main thing is CPU max multi is max multi, no matter what you do.

If you can find BIOS String file, then remove string that is over 400 bytes, and put back, then you should be able to properly open BIOS in AMIBCP 4.55

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OK, that makes sense then! Please show me an image of your current CPU multi option page. No, only with extreme / unlocked / K type CPU's can you raise the CPU multiplier past default, other than that auto turbo may boost on certain systems past max default.

To change NVRAM best way is not grub, best way to do that is dump it via SCEWin and write back once edited. Here, see if you can run any of these versions on your system, if you can send me back the NVRAM.txt output files and I will check to see if you have any good option there (You can check too of course)
I personally do not think you will find what you're looking for in NVRAM, other than possibly unlocking a menu, but that's best done in other ways.
http://www.filedropper.com/scewin

I will check your link too, leaving shortly though so may not be able to get back to you on this again until tonight.

I forgot to add command to write back NVRAM in the text file
SCEWIN_64 /i /s nvram.txt
or
SCEWIN /i /s nvram.txt

Afterwards it's suggested to do a global reset with FPT (Version must be from FPT package matching your ME Version) >> fpt -greset

Zitat von Lost_N_BIOS im Beitrag #7

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OK, that makes sense then! Please show me an image of your current CPU multi option page. No, only with extreme / unlocked / K type CPU's can you raise the CPU multiplier past default, other than that auto turbo may boost on certain systems past max default.

To change NVRAM best way is not grub, best way to do that is dump it via SCEWin and write back once edited. Here, see if you can run any of these versions on your system, if you can send me back the NVRAM.txt output files and I will check to see if you have any good option there (You can check too of course)
I personally do not think you will find what you're looking for in NVRAM, other than possibly unlocking a menu, but that's best done in other ways.
http://www.filedropper.com/scewin

I will check your link too, leaving shortly though so may not be able to get back to you on this again until tonight.

I forgot to add command to write back NVRAM in the text file
SCEWIN_64 /i /s nvram.txt
or
SCEWIN /i /s nvram.txt

Afterwards it's suggested to do a global reset with FPT (Version must be from FPT package matching your ME Version) >> fpt -greset

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Yes, I read that link you gave, seems like you can overclock that way, but not by changing CPU multi, it looked like turbo bins and TDP edits.

What do you mean you can't get files from my link? Use gray download button in middle of page, enter 4 digit shown (If you don't see, disable ad-block and refresh page) and then download gray button again. Do you need another upload to different host?
You wont find SCEWin like I posted, it's not a public tool and I put 4 different versions in there, you may get lucky and find one but you need a bunch of versions in order to get luck and find the one that works for your system.
If you need me to upload to somewhere else, please tell me what file host you like and I can upload there.

Zitat von Lost_N_BIOS im Beitrag #9

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Yes, I read that link you gave, seems like you can overclock that way, but not by changing CPU multi, it looked like turbo bins and TDP edits.

What do you mean you can't get files from my link? Use gray download button in middle of page, enter 4 digit shown (If you don't see, disable ad-block and refresh page) and then download gray button again. Do you need another upload to different host?
You wont find SCEWin like I posted, it's not a public tool and I put 4 different versions in there, you may get lucky and find one but you need a bunch of versions in order to get luck and find the one that works for your system.
If you need me to upload to somewhere else, please tell me what file host you like and I can upload there.

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I thought so, that's what I was thinking was "Turbo Bins" I will unlock those for you in BIOS then you can re-program, but it may also need changed in NVRAM too. On the SCEWin, did the version you get work for your board?

If not, here is few more mirrors for the package I posted, since you did not explain the problem? I can't figure out how to upload and get link at NZ without making accounts
https://nofile.io/f/JGV5NgobY1m/SCEWin-Multi.zip
https://www.sendspace.com/file/yuoaw2

About the freeze after your current attempts, that is why I gave you the initial BIOS I did, unlocked the BIOS Interface lock (That's probably what was stopping you previously). Program that BIOS again before doing anything further, that way those locks are all out of the way and don't need to also be changed.

sry for delayed reply.
i actually unlocked those locks(by GRUB) at a very early stage of my research(and before any manipulation,of course),but still no luck.
i'll try SCEWin you provided this time,tbh i dont think it will make any difference :)
btw i dig into the W530 unlock thread mentioned above,and try to adopt the operation to my BIOS.it turns out i find some module highly suspected related to MSR0x194 settings.you can find it by searching "powermanagement" in UEFITool. the problem is i cant extract assembly code for further editing,maybe i just dont know how to use the tool correctly?
thanks for your reply

Well those need to be either permanently unlocked in BIOS, which is why I gave you modified BIOS, or unlocked by grub and then no BIOS flash after that or they get reset.

SCEWin is for us to look at NVRAM settings and edit if any are related. Did you get NVRAM.txt output from any of the versions?

I am looking at the powermanagement MSR 0x194 for you now, please be patient. May also be in other module instead (Like pchinitdxe), can you find anyone discussing your exact model and x194 unlock, so we can be sure correct module before digging in too deep?

I have found that MSR = 0x1AD in grub - see post #46 - https://forums.anandtech.com/threads/wha....2496647/page-2
See also, here in post #12 (And see #15 for explain) for MSR tool so you can check actual CPU options - https://www.overclock.net/forum/5-intel-...2-3-7ghz-2.html

@DeathBringer - can you help with the MSR 0x194 unlock? Thanks!

Zitat von Lost_N_BIOS im Beitrag #13

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Well those need to be either permanently unlocked in BIOS, which is why I gave you modified BIOS, or unlocked by grub and then no BIOS flash after that or they get reset.

SCEWin is for us to look at NVRAM settings and edit if any are related. Did you get NVRAM.txt output from any of the versions?

I am looking at the powermanagement MSR 0x194 for you now, please be patient. May also be in other module instead (Like pchinitdxe), can you find anyone discussing your exact model and x194 unlock, so we can be sure correct module before digging in too deep?

I have found that MSR = 0x1AD in grub - see post #46 - https://forums.anandtech.com/threads/wha....2496647/page-2
See also, here in post #12 (And see #15 for explain) for MSR tool so you can check actual CPU options - https://www.overclock.net/forum/5-intel-...2-3-7ghz-2.html

@DeathBringer - can you help with the MSR 0x194 unlock? Thanks!

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Thought we'd get lucky, only some versions work on some chipsets, but sometimes OS matters too (Try win7 if you can, best luck for me has been that OS)

I ask a few people to help me on that MSR unlock, hopefully we can find for you! Thank you for the added links, I know how to unlock it for certain things and how to recognize like the 0xE2, but in other modules, I can't seem to find in this one, that is why I thought maybe it's not this module, but it's different lock than normal too so I probably just am not recognizing it.