I have an EVGA GTX 780-ti 3GB card Quadro modded with a toggle switch on the back (at the exit vents) - there is plenty of air movement, toggle switch is small such that the card mounts as normal, and other than the switch, there is nothing different from stock visible externally.
The mod was done as has been described here extensively (18K resistor on the EEPROM pins between SCLK / VCC), with a toggle switch to allow choosing GTX / Quadro as you need it. Flip the switch and you have a (as far as the BIOS reports) Quadro K6000 which will run Quadro drivers and work with various pro CAD applications, flip it back and you have a GTX 780ti (you have to boot after switching between modes, ofcourse).
Using PCI-passthrough in KVM / QEMU the modded Quadro is able to run natively in a Windows VM using the Quadro Drivers.
I no longer need the card and am going to put it up on eBay. For a non-EEVBlog user the added benefit of a cleanly Quadro modded GTX 780ti is probably entirely lost, hence I'm asking here if there would be any interest in this card.