I don't know if he still has his, but I have a Quadro K6000 with an EK-FCQ6000 installed I'm going to give the modded bios posted earlier in this thread a shot when I have some time.
The K6000 is in my personal workstation; I currently have it on a bench in the lab where I work... I couldn't justify this machine under any of our existing grants and I didn't feel like chasing a new grant for this system, so I bought the parts and built it myself. If I move on, the lab will either buy the system from me, or I'll take it home or maybe to my next job.
Specs on this system, named "heavenly":
4x Opteron 6386se with an EK supremacy socket G34 waterblock on each
2x HT<->PCI-e chips on the motherboard, each with Koolance water block
Supermicro H8QGL-6F motherboard
Supermicro 748TQ-R1400B case
3x 1400W hotswap PS
16x 16GiB ECC Registered DDR3 (256GiB total)
Quadro K6000 with EK waterblock
Mellanox 10GBe 2 port SFP+ NIC
Onboard 2 port Intel gigabit rj45
Various SSDs with EXT4 filesystems and 5x 5400rpm big disks in RAIDZ1 with ZFS on top
Gentoo Linux with Ubuntu amd64 in a chroot jail with 32-bit compat libs installed for installing steam and other 32-bit stuff without forcing me to enable multilib support in the production Gentoo installation. Kerbal Space Program and Planetary Annihilation run well, and they are 64-bit, of course. It's just steam itself that is 32.