More water in the pool for us.

as for firmware upgrading, I've not dove into them very deep. I just learned last night how to change the clocking speeds. I lowered them all from freq 400 to freq 393.75. They seem to be getting better speeds with cooler temps, so they're not being overworked in that aspect anymore.
They were running way to high. 393.75 is pushing them hard, 400 is pretty crazy to run them that high. The max I've done is 381. Higher than that and they become unstable or throw lots of hardware errors.