Hello folks,
I own this MB since long years, but I never intent to use the 2nd BIOS embedded.
Yesterday, I've try to have a look on it by switching the dipswitch from 1 to 2 and boot my computer.
The computer try to boot only for an half second, I see the fan starting and perform an half cycle then everything switch off and 3 seconds later, it start again and stop; all of this in loop.
I've try to clean the CMOS, no change. I've remove the battery for a minute then when pressing PWR button, it have perform 3 cycle of boot attempt and then it start, but the POST was stuck at 04 (Southbridge init before µcode loading).
After 3 try of this boot, the MB seem to go in security mode and doesn't start at all; the power button on the MB is Green but all other leds are off and push start doesn't make anyhting. I had to unplug the PSU for 1 hour and remove the battery to recover it.
 
Rollback to BIOS 1 work well but (and it's normal) all settings are lost.
 
Today, I use FTP to have a look on both BIOS.
Everything is OK with BIOS 1:
 

C:\Users\Coin-Coin\Desktop\E097_flashtool_208\FPTWIN\64>fptw64.exe -I
Intel (R) Flash Programming Tool. Version: 9.1.2.1000
Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.
Platform: Intel(R) C610 Series Chipset
Reading HSFSTS register... Flash Descriptor: Valid
--- Flash Devices Found ---
GD25B128C ID:0xC84018 Size: 16384KB (131072Kb)
--- Flash Image Information --
Signature: VALID
Number of Flash Components: 1
Component 1 - 16384KB (131072Kb)
Regions:
Descriptor - Base: 0x000000, Limit: 0x000FFF
BIOS - Base: 0x800000, Limit: 0xFFFFFF
ME - Base: 0x003000, Limit: 0x7FFFFF
GbE - Base: 0x001000, Limit: 0x002FFF
PDR - Not present
Master Region Access:
CPU/BIOS - ID: 0x0000, Read: 0xFF, Write: 0xFF
ME - ID: 0x0000, Read: 0xFF, Write: 0xFF
GbE - ID: 0x0118, Read: 0xFF, Write: 0xFF
Total Accessable SPI Memory: 16384KB, Total Installed SPI Memory : 16384KB
FPT Operation Passed

 
But with Windows booted, when I switch to BIOS 2 and I try to perform a dump of the config, I see that error :

C:\Users\Coin-Coin\Desktop\E097_flashtool_208\FPTWIN\64>fptw64.exe -I
Intel (R) Flash Programming Tool. Version: 9.1.2.1000
Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.
Platform: Intel(R) C610 Series Chipset
Reading HSFSTS register... Flash Descriptor: Valid
--- Flash Devices Found ---
Error 103: There are no supported SPI flash devices installed. Please check connectivity and orientation of SPI flash device.

I precise, I NEVER touch the BIOS in Bank 2, and I have only update the BIOS in Bank1 in the whole MB life.
Current BIOS in Bank 1 is 0208 (the latest I think), and I think the bank 2 contain the factory one.
 
My config is: 
-MB: EVGA X99 FTW-K
-CPU: Intel 6950x
-32Gb of Kingston HyperX Savage (KHX2400C12D4/8GX)
-GFX: NV 3080ti FE
-PSU : an old and wise OCZ 1200W
 
Anyone already faced an issue like it or have an idea on how to resolve it ?
 
Thx and kindly regards from  Toulouse, France
 
Morhue (Rémi)

I tried several times to flash the BIOS in bank 2. It didn't work.
Finally, I successfully perform an ident of the bios and the flash was OK after letting the computer up during several hours...
I don't understand why.
After that, I've boot on the bios in bank 2  without any problems.
Maybe a whim of the diswitch....
BTW, Thx a lot for your support.
 
Kindly regards,
 
Morhue

ZoranC

Morhue
Finally, I successfully perform an ident of the bios and the flash was OK after letting the computer up during several hours...
I don't understand why.

 
Maybe CR2032 battery got low and requires replacement?

Thx Zoran for your remark. I've replaced it. I don't think it make a difference as the MB work like a charm right now, but after 5 years it's a good idea to replace it.