Hi everyone i had problems with my z370 gaming wifi bios i downloaded the bios from the official site and tried to write it but after verify it gives me that error Chip main memory with the contents are in disagreement i figure out that i need to do something to the bios file first before flashing it but i don`t understand it really i need some help

@dimdim - What is your BIOS chip ID? Read if off the chip, do not rely on what any software tells you.
Not all software version work for all chips. If it is REALLY MX25U12873F then you need 1.8V adapter and to use the version of software in folder of package below named >> CH341A v1.31(1.4) (CH341AFree) Choose correct size and type first
https://ufile.io/p21lj9ck

@Lost_N_BIOS
Hi i was really waiting for you to comment so thx for the fast replay
My chip is the l one its a 3 volt one i connected it without troubles but i forgot to remove the cmos battery is it bad for the chip?
And i tried the free edition 1.4 but i get a strange chip name like cc27 something not my chip mine is mx25l12873f i tried 1.34 in the photo up there it gives me this error and tried asprogrammer and tried to unprotect then erase then blank check still nothing when i write the bios file do i let it as it's there's no. Bin there there's nothing only f15a

You're welcome! You can leave CMOS battery, it's OK
Use the version I mentioned, choose correct chip type (25) and correct chip size (128/16MB) and that is all, then erase, blank check, open BIOS file, write, verify.
Ignore anything on left 24 side, that is not about chip ID, chip ID is not detected or shown to you when doing what you're doing here with type 25 chip

@Lost_N_BIOS
So you mean that i need to use the 1.4 even if it's not showing the right chip id? Just put the chip size and this settings and another question can i flash the backup bios first then flash the main bios after booting with the backup bios? Or i will need to flash the main bios first and thanks for everything
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And what about the bios file do i go flash the official site bios straight or do i need to edit something in it first

@dimdim - Yes, use the version in the folder I mentioned, from the download link I gave above >> CH341A v1.31(1.4) (CH341AFree)
Select 25, then select correct chip size 128/16, then do as I mentioned (you can use "detect" or not, does not matter)

Ohh, sorry about the ID and my comment before, I see what you mean now! I forgot this one does show you the flash ID in hex format >> This is correct for > C2201817 = MX25L12873F (same/same)
You will see that same ID/Info in 1.34 and ASProgrammer too, see your images at post #1 - Well at least for 1.34, ASProgrammer you'd only see if it you scrolled up at the bottom info section >>
Manufacture ID >> C2
Memory Type >> 20
Memory Capacity >> 18
Device ID >> 17

= C2201817

About Main/Backup, just get Main BIOS working first, then worry about backup. If you have a BIOS switch, then you can flip that while in Qflash to flash the backup.
Otherwise, once fixed, you can just choose to also flash backup from Qflash with another BIOS reflash, or by using the /DB switch with EFIFlash.

Sorry, I assumed you already had BIOS ready to program in. Gigabyte does not put serial or UUID in BIOS, but Ethernet LAN MAC ID will need transferred over before you program it in, or you can fix that later with FPT, up to you.
Send me your dump and I will tell you where LAN MAC ID is located, or you can check if you know how to use UEFITool (use 25.0 version) Look in dump and GBE, it should be at beginning of GbE region, but may also be at 1000h of GbE too (both places same)
You can extract GbE from your dumped BIOS, and replace into stock BIOS, then program in. Or, you can fix in OS later once your up and running again via >> FPTw.exe -gbe -f gbe.bin (using the dumped GbE with your MAC ID in it already)

@Lost_N_BIOS unfortunately i couldn`t wait and i flashed both chips with your version without changing my mac so now it`s working thanks to you ofcourse but i have two problems now i my xmp profile won`t turn on and i don`t know if my main bios flashed or not but its working now , if you can (have time) can i upload my bios dump for you so you can give me my mac address and which one that i give you my backup or the main

@dimdim - Well, slow down, always, when it comes to BIOS!! Glad to hear you are now booting
What do you mean you flashed it with "My version"?? My version of what? I didn't post any BIOS here for you, so I'm lost as to what you mean there

Give me dump of MAIN and I will give you MAC address. Or, you can get off sticker on your board Usually it's on side of 24 pin, or near the LAN port (check all sides of metal block), or sometimes on SATA Ports too, or top/bottom side of PCI/PCIE Slots.

XMP issue, probably you need to either reset ME FW state via full 1+ minute power drain (remove 8/24 pin cable, press and hold case power on button for 10 seconds, then wait 1+ minute)
Or, you can issue this command with Intel FPT software if you are familiar with using that and have correct version for your systems ME FW (I think you need V11 ME system tools) >> FPTw.exe -greset
If neither of those help, then you may have corrupted write, or you may just need to clear CMOS then, load optimized defaults in the BIOS, save and reboot, then try again.

@Lost_N_BIOS i meant the ch431a programmer app version :D and yeah i have my motherboard box i will try to do that tonight because i am fixing it from 7 hours i think and i want to sleep :D
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@Lost_N_BIOS for real you saved my day thanks again

@dimdim - Ohh, you mean software version? If yes, OK, I gotcha
MAC ID wont be on the box, it will be on a sticker on the motherboard itself. Or, if you can't find, you can send me ANY previous full BIOS backup you made and then I can tell you the MAC ID
Then, if needed, I can show you how to dump GbE and how to edit to put MAC in there, then how to program it back

You're welcome, happy to be able to help you save your board and sanity
Get some sleep now that you can rest easy!

hey @Lost_N_BIOS i got a sweet 10 hours of sleep after 15 days and thats because of you :D thanks again
for now i did what you said exactly and after i did that i cleared my cmos before i put my 24 pin cable back now its working i have my xmp working again there`s one last thing about the mac address i will send you a photo with 2 numbers i just wanna know which number is my mac address and more info about that FPT i don`t know thing about it