All the documentation I've read says K1 or K2 only, so I'd rather try to figure out how to get the 3rd byte to a B in the hard strap.
Also, you noticed what happened in the drivers when I set it to a Tesla, so I'm not sure if there's a way for the drivers to detect the hacked cards, or not, but the K2, the way the card is currently set, seems to work OK on native Windows.
Is there anything you can suggest I can try with the resistors, or should I experiment?
Update: I noticed my card has two extra resistors by the EEPROM that aren't in the pics shown for the 680 mod. I then noticed pics online for this board are version 3.0 which matched the pics, mine is version 4.0. They changed the board! The two resistors are very low... 6ohm (not even 1k) and are labeled R779 and R780. Should I try to jump one of them and remove the resistor?
I will try to take a pic but my camera is poor quality.
Update2: I added the 25k ohm resistor back and made it a Tesla K10, having the same issues as before. Now, I modified the BIOS AND strap to make the DeviceID 0x1184, with success... it installed the driver for the GTX 770, and is fully operational on bare metal Windows 8.1. This finding tells me that the K10 (which doesnt have any display outputs) was changed in the driver to not link the DVIs to the GPU (The DVIs came up as Microsoft Displays, see above). Changing the soft strap allowed the GTX 770 driver link the DVI to the GPU, fully enabling the card.