I installed Catalina using DosDude1's hack. Everything works great but I just can't get video to output from my Mac Edition GTX 680 over DisplayPort. Only HDMI works but I need DisplayPort for 60hz with my 4K monitor. I used the default DosDude1 settings. I guess I could roll back to Mojave, but man what a drag. Did I do something wrong? Today I have flashed a GTX 680 4GB with a Mac BootScreen, but I do not know how to test the Bootscreen. Do you have any idea how I can make my 15' MBP 2018 to boot from the eGPU? It's always booting from the internal display @goalque, you know a lot about those things. Do you have a tip?
RocknRollaDE
New Member
first things first
this card wasnt mine before.
i've made a cheap deal on ebay.
im looking around for a few days till now but i wasnt able to find any working answers.
looks like the prevous owner flashed the bios of a gtx 680 on it.
im trying to repair this little bitch.
the probelms..
ive tried every version of nvflash i could find.
none of these seems to work.nvflash recognized the card as 680 and it recognized the eeprom amic a25L020
im not able to dump the bios successfully.
Geforce Gtx 680 Mac Edition
nothing changed when i flashed the original 660ti bios on it.
nvflash --check
NVIDIA Firmware Update Utility (Version 5.134)
Adapter: GeForce GTX 680 (10DE,1180,19DA,1280) H:--:NRM B:02,PCI,D:00,F:00
The display may go *BLANK* on and off for up to 10 seconds during access to the
EEPROM depending on your display adapter and output device.
Identifying EEPROM..
EEPROM ID (37,3012) : AMIC A25L020 2.7-3.6V 2048Kx1S, page
nvflash -r
NVIDIA Firmware Update Utility (Version 5.134)
Adapter: GeForce GTX 680 (10DE,1180,19DA,1280) H:--:NRM B:02,PCI,D:00,F:00
The display may go *BLANK* on and off for up to 10 seconds during access to the
EEPROM depending on your display adapter and output device.
Identifying EEPROM..
EEPROM ID (37,3012) : AMIC A25L020 2.7-3.6V 2048Kx1S, page
Setting EEPROM software protect setting..
Remove EEPROM write protect complete.
nvflash -4 -5 -6 Zotac.GTX660Ti.2048.120722.rom
NVIDIA Firmware Update Utility (Version 5.134)
Checking for matches between display adapter(s) and image(s)..
Adapter: GeForce GTX 680 (10DE,1180,19DA,1280) H:--:NRM B:02,PCI,D:00,F:00
WARNING: None of the firmware image compatible PCI Device ID's
match the PCI Device ID of the adapter.
Adapter PCI Device ID: 1180
Firmware image PCI Device ID: 1183
PCI Device ID override detected.
(This is usually only needed for very special circumstances.)
Are you sure you want to continue?
Type 'YES' to confirm (all caps):
YES
Overriding GPU mismatch
Current - Version:80.04.4B.00.14 ID:10DE:1183:19DA:1280
GK104 Board - 20040001 (Normal Board)
Replace with - Version:80.04.4B.00.14 ID:10DE:1183:19DA:1280
GK104 Board - 20040001 (Normal Board)
Update display adapter firmware?
Press 'y' to confirm (any other key to abort): y
The display may go *BLANK* on and off for up to 10 seconds or more during the up
date process depending on your display adapter and output device.
Identifying EEPROM..
EEPROM ID (37,3012) : AMIC A25L020 2.7-3.6V 2048Kx1S, page
Clearing original firmware image..
.
Storing updated firmware image..
....
Verifying update..
Update successful.
it really looks like that nvflash isnt able to successfully write to the eeprom.
the thing i want to try out is program this little bitch with an external programmer.
but i dont understand how since the bios dump is only 179kb and the eeprom has 256kb of space.
another way i was thinking about was to edit the device id.
but i dont know how.
How To Flash Gtx 680 For Mac Windows 10
the 660ti is '10DE 1183'the 680 is '10DE 1180'
so.. does anybody in here got an idea or can tell me how to write the 179kb bios file to the eeprom ?
Hmmm, i didnt try the gtx 680. But .. it should work.
I own a flashed gtx 980 ti in my mp 2010/5.1, this one works perfect.
Gtx 680 Mac Edition
Unflashed grafic cards for windows systems should work, but they dont show the booting screens, until osx has fully loaded. So in case of booting problems you will not see any error screens, and the osx boot volume selection screen (where you choose between osx and boot camp) cannot be displayed.
Flashed grafic cards will show you the boot screens too.
How To Flash Gtx 680 For Mac Catalina
Facebook message recovery tool for mac. Have a look at http://www.macvidcards.com/, they have a wide variety of grafic cards, from low cost up to high end. And they have a flashing service for many pc cards.
greetings from germany, Chris
Aug 31, 2017 10:59 AM