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  1. #1
    ROG Enthusiast Array 0neWinged PC Specs
    0neWinged PC Specs
    Laptop (Model)Asus G75VW-BBK5
    MotherboardAsus G75VW (Intel HM77) W/ Custom BIOS
    ProcessorIntel Core i7 3610QM @ 2.3Ghz
    Memory (part number)32GB (F3-1600C9S-8GRSL)
    Graphics Card #1NVIDIA GeForce GTX 660M 2GB
    Sound Card5.1 VIA HD Audio
    Monitor17.3" 1080P Matte LED
    Storage #1240GB Sata III Intel 535 SSD (SSDSC2BW240H601)
    Storage #2Western Digital Black 7200RPM 1TB HDD (WD10JPLX)
    CPU CoolerAsus Cooling Heatsink (13N0-MBA0601)
    CaseASUS G75VW w/Custom Intake Mod and Carbon Fiber Vinyl Wrap
    Power SupplyASUS 180W Power Supply (AC 100-240V, 50-60Hz, DC 19V 9.5A)
    Keyboard ASUS Built In Keyboard w/Red LED backlight Mod
    Mouse ASUS ROG GX950 Laser Mouse
    OS Windows 10 Pro X64
    Network RouterASUS RT-AC3200 Tri-Band Wireless-AC3200
    Accessory #1 Upgraded Intel Dual Band Wireless-AC 7260 Plus 4.0 Bluetooth
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    Question G75VW VBios Help

    Alright so I have an Asus G75vw with a GTX 660m. I bought a GTX 780m and heatsink from a G750jh. I did some chassis modifications and managed to get everything to fit. Flashed new bios with vbios of 660 and 780.
    I turned off UEFI prior to flash, turned UEFI off prior to card swap. Laptop fired up, but boots to Asus boot logo screen, (where you would normally access bios) but gets stuck. I cannot access bios. Trouble shooted a few things, but still no luck. Even swapped back to the 660m and boots passed the boot screen. So I then re flashed to my stock bios, and tried swapping to 780m to see if it wouldn't show the boot screen, but it does the same thing.
    So.. From what I am told it is trying to load the VBIOS onboard of the 780M PCB. Also was told It definitely is a module regarding PEG control. This should be in the unlocked "Chipset" tab, but as I've mentioned a while back, this is where things can bjork the boot block and even the recovery block if a setting you enable is deep BIOS disabled.. (no supported callback module) meaning, ICSP programmer is the only way out of it. (Don't want to brick or have to find a ICSP programmer).
    Any insight would be appreciated. I also have this up at WIN RAID forum as well, but figured it can't hurt to have more eyes and brains.
    In the end, I just want this thing to recognize the 780 as its card and boot. I already have modified drivers, just need a successful boot.
    Anyone willing to help with this modification will be highly highly appreciated.
    Thanks!
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    Last edited by 0neWinged; 06-11-2016 at 06:55 PM.

  2. #2
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    Hi. As I remember correctly G75 series has vbios inside of main system bios. Correct me if I am wrong. Did you remove completely 660m vbios from bios or just added 780m vbios on top?
    Did you tried 780m with UEFI enabled?
    Where did you got 780m vbios you inserted inside bios?
    Is it asus 780m vbios?
    Last edited by jmhdj; 06-12-2016 at 11:44 AM.

  3. #3
    ROG Enthusiast Array 0neWinged PC Specs
    0neWinged PC Specs
    Laptop (Model)Asus G75VW-BBK5
    MotherboardAsus G75VW (Intel HM77) W/ Custom BIOS
    ProcessorIntel Core i7 3610QM @ 2.3Ghz
    Memory (part number)32GB (F3-1600C9S-8GRSL)
    Graphics Card #1NVIDIA GeForce GTX 660M 2GB
    Sound Card5.1 VIA HD Audio
    Monitor17.3" 1080P Matte LED
    Storage #1240GB Sata III Intel 535 SSD (SSDSC2BW240H601)
    Storage #2Western Digital Black 7200RPM 1TB HDD (WD10JPLX)
    CPU CoolerAsus Cooling Heatsink (13N0-MBA0601)
    CaseASUS G75VW w/Custom Intake Mod and Carbon Fiber Vinyl Wrap
    Power SupplyASUS 180W Power Supply (AC 100-240V, 50-60Hz, DC 19V 9.5A)
    Keyboard ASUS Built In Keyboard w/Red LED backlight Mod
    Mouse ASUS ROG GX950 Laser Mouse
    OS Windows 10 Pro X64
    Network RouterASUS RT-AC3200 Tri-Band Wireless-AC3200
    Accessory #1 Upgraded Intel Dual Band Wireless-AC 7260 Plus 4.0 Bluetooth
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    Quote Originally Posted by jmhdj View Post
    Hi. As I remember correctly G75 series has vbios inside of main system bios. Correct me if I am wrong. Did you remove completely 660m vbios from bios or just added 780m vbios on top?
    Did you tried 780m with UEFI enabled?
    Where did you got 780m vbios you inserted inside bios?
    Is it asus 780m vbios?
    Ah the man I've been waiting to hear from!! Lol
    Yes G75 does have vbios inside of main system bios.
    I have been working with Dreamonic up to this point and talking with him on his site voltground. I dumped my bios and I uploaded to him. Which has 660m and 670m vbios. He removed 670m vbios and replaced with 780m. So the newly modified bios has 660m and 780m vbios.
    I did try 780m with UEFI enabled, still same result, stuck at ROG boot logo.
    Dreamonic had the 780m vbios and I'm almost positive he used Asus 780m vbios.
    Im worried to flash only 780M Vbios as I may get stuck trying to revert due to the fact I cant access bios or boot menu with 780M installed and probably not be able to access bios or boot menu with 660M installed

    Ill inform him of this thread so he can pitch in too. Hes smarter than I am on this bios mod subject and would be able to provide better details than me. Ill have out convo points uploaded as they are PM and not a thread so I can provide a link. Ill also provide links for all bios/vbios .rom files that were used.



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  4. #4
    ROG Guru: Yellow Belt Array
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    Dont know what to say as I havent mod anything beyond asus G73 models. You would have better chance for help from dreamonic if you could take whole bios dump. Only way to get whole dupm is to desolder bios chip and read it with soic reader.
    What could be another route is to see if there are different revisions of asus 780m vbios.

  5. #5
    ~¦ Noesis ¦~ Array Dreamonic PC Specs
    Dreamonic PC Specs
    Laptop (Model)ASUS GX800VH-XS79K
    MotherboardASUS GX800VHK (Intel CM238/IDA154) w/Custom BIOS
    ProcessorIntel Core i7-7820HK @ 4.7Ghz (+150mV) FCBGA 1440
    Memory (part number)64GB (PC4-22400) @ 18-18-18-38-53 (76.D305G.D060B)
    Graphics Card #1NVIDIA GeForce GTX 1080 8GB (GP104) OC @ +225/+750 w/Custom VBIOS
    Graphics Card #2NVIDIA GeForce GTX 1080 8GB (GP104) OC @ +225/+750 w/Custom VBIOS
    Sound CardVANTEC 7.1 External Audio Adapter
    MonitorASUS PG348Q 34" 3440x1440 @ 100Hz w/G-SYNC (mDP-to-DP)
    Storage #13x Samsung 512GB NVMe SSD RAID0 (S316NY0HA00959)
    CPU CoolerASUS GX800VHK Water Cooling Dock
    CaseASUS GX800VHK Chassis
    Power SupplyASUS 2x 330W Power Adapter (AC 100~240V, 50/60Hz, 16.9A/19.5V)
    Keyboard ASUS ROG Claymore Core
    Mouse ASUS ROG Spatha
    Headset ASUS STRIX 7.1 Gaming Headset
    Mouse Pad ASUS ROG Whetstone
    Headset/Speakers Altec Lansing Octane 7 (VS4621) 2.1 Speakers
    OS Windows 10 Pro x64 / Arch Linux w/KDE Plasma
    Network RouterASUS RT-AC87U w/Merlin
    Accessory #1 Kensington 4 Port USB 3.0 Hub (K33978WW)
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    It is indeed the ASUS 780M VBIOS and no, flashing with just the 780M OROM isn't going to help at this point as the VBIOS onboard the 780M is definitely being used. My guess is it's either PEG control/BUS interface as the system BIOS callback is to the OROM for the GPUs in the G75 unlike the G750. However, with just the 780M installed with nothing else done, the display still actually works too. The fact it's preventing BIOS access leads me to believe it's certain callback modules that the G750 has for read/write (0xFF) access to the BIOS chip onboard its PCB through ASUS MXM structure as faults have been detected. I believe those correct modules are the LegacyRegion2 (G750) and PciExpressDxe (G75) modules and a couple others. It's now getting to a point where it can potentially corrupt the boot block and recovery block should it not succeed (requires HW programmer) through experimentation.

    EDIT: Now I understand jmhdj, you've done the G73JH that has only the ATI GPU HW callbacks with the G73SW that has only the NVIDIA GPU callbacks. This I understand. What is strange with our modification is the MXM GPU > OROM > System BIOS in the G75 to the MXM GPU > GPU VBIOS (onboard) > System BIOS (no OROM) in the G750. Since one reads differently than the other yet the display is still being initialized... that's the part I'm trying to figure out. That means the VBIOS is correct but modules in the system BIOS are not configured for it.
    Last edited by Dreamonic; 06-12-2016 at 06:09 PM.

  6. #6
    ~¦ Noesis ¦~ Array Dreamonic PC Specs
    Dreamonic PC Specs
    Laptop (Model)ASUS GX800VH-XS79K
    MotherboardASUS GX800VHK (Intel CM238/IDA154) w/Custom BIOS
    ProcessorIntel Core i7-7820HK @ 4.7Ghz (+150mV) FCBGA 1440
    Memory (part number)64GB (PC4-22400) @ 18-18-18-38-53 (76.D305G.D060B)
    Graphics Card #1NVIDIA GeForce GTX 1080 8GB (GP104) OC @ +225/+750 w/Custom VBIOS
    Graphics Card #2NVIDIA GeForce GTX 1080 8GB (GP104) OC @ +225/+750 w/Custom VBIOS
    Sound CardVANTEC 7.1 External Audio Adapter
    MonitorASUS PG348Q 34" 3440x1440 @ 100Hz w/G-SYNC (mDP-to-DP)
    Storage #13x Samsung 512GB NVMe SSD RAID0 (S316NY0HA00959)
    CPU CoolerASUS GX800VHK Water Cooling Dock
    CaseASUS GX800VHK Chassis
    Power SupplyASUS 2x 330W Power Adapter (AC 100~240V, 50/60Hz, 16.9A/19.5V)
    Keyboard ASUS ROG Claymore Core
    Mouse ASUS ROG Spatha
    Headset ASUS STRIX 7.1 Gaming Headset
    Mouse Pad ASUS ROG Whetstone
    Headset/Speakers Altec Lansing Octane 7 (VS4621) 2.1 Speakers
    OS Windows 10 Pro x64 / Arch Linux w/KDE Plasma
    Network RouterASUS RT-AC87U w/Merlin
    Accessory #1 Kensington 4 Port USB 3.0 Hub (K33978WW)
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    I wonder if shorting (prior to boot - temporarily) the 780M BIOS chip to bypass it would allow the read of the OROM (VBIOS inserted) instead...
    Last edited by Dreamonic; 06-12-2016 at 06:17 PM.

  7. #7
    ROG Guru: Yellow Belt Array
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    Sounds like logical and probably correct diagnosis. As for which modules inside system bios are responsible your gues is better than mine
    Wish you best luck further.
    Will watch over this thread and if I get any ideas will post them.

  8. #8
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    Quote Originally Posted by Dreamonic View Post
    I wonder if shorting (prior to boot - temporarily) the 780M BIOS chip to bypass it would allow the read of the OROM instead...
    It cant hurt at all, as long as he dont short something other

  9. #9
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    If I remember long time ago other guy tried to upgrade his G53 with asus 780m gpu and we found that asus 780m is mechanicaly different from standard mxm 3.0 gpu's.
    Will check on this as I am not sure my recolection is good.

  10. #10
    ~¦ Noesis ¦~ Array Dreamonic PC Specs
    Dreamonic PC Specs
    Laptop (Model)ASUS GX800VH-XS79K
    MotherboardASUS GX800VHK (Intel CM238/IDA154) w/Custom BIOS
    ProcessorIntel Core i7-7820HK @ 4.7Ghz (+150mV) FCBGA 1440
    Memory (part number)64GB (PC4-22400) @ 18-18-18-38-53 (76.D305G.D060B)
    Graphics Card #1NVIDIA GeForce GTX 1080 8GB (GP104) OC @ +225/+750 w/Custom VBIOS
    Graphics Card #2NVIDIA GeForce GTX 1080 8GB (GP104) OC @ +225/+750 w/Custom VBIOS
    Sound CardVANTEC 7.1 External Audio Adapter
    MonitorASUS PG348Q 34" 3440x1440 @ 100Hz w/G-SYNC (mDP-to-DP)
    Storage #13x Samsung 512GB NVMe SSD RAID0 (S316NY0HA00959)
    CPU CoolerASUS GX800VHK Water Cooling Dock
    CaseASUS GX800VHK Chassis
    Power SupplyASUS 2x 330W Power Adapter (AC 100~240V, 50/60Hz, 16.9A/19.5V)
    Keyboard ASUS ROG Claymore Core
    Mouse ASUS ROG Spatha
    Headset ASUS STRIX 7.1 Gaming Headset
    Mouse Pad ASUS ROG Whetstone
    Headset/Speakers Altec Lansing Octane 7 (VS4621) 2.1 Speakers
    OS Windows 10 Pro x64 / Arch Linux w/KDE Plasma
    Network RouterASUS RT-AC87U w/Merlin
    Accessory #1 Kensington 4 Port USB 3.0 Hub (K33978WW)
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    They do have their own proprietary PCB design but the MXM connection shouldn't have changed according to this:

    MXM Version 3.0 Technical Brief
    MModule Concept

    The MXM version 3.0 specification allows system designers the flexibility to customize the module
    in a OEM shipping configuration. The MXM version 3.0 specification achieves this goal by allowing
    the freedom to use OEM-specific, non-compliant, modules in an MXM version 3.0 compliant system.
    Common scenarios are:

    Form Factor

    OEM modules are allowed to use non-standard form factors as long as the system can
    accommodate MXM version 3.0 standard modules.

    VBIOS ROM

    OEM modules are not required to have a ROM chip as long as the system can correctly
    operate using a standard MXM version 3.0 module with on-board VBIOS ROM.

    Power

    OEM modules can rely on additional voltages supplied by the motherboard. OEM reserved
    pins are provided by the specification. All MXM version 3.0 compliant modules will not connect
    these pins.

    Extra Signals

    OEM modules are allowed to use extra signals provided by the motherboard. OEM
    reserved pins are provided by the specification. All MXM version 3.0 compliant modules will not

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