I considered watercooling the chip and putting those heatsinks on all the RAM and voltage regulators, but the cost per card would have been prohibitive.
It’s just way cheaper to run the original heatsink and add a fan. I also happen to have a ton of old fans around my house.
Temps in the 60’s are nothing for the Hawaii chips… they run HOT … if you look at people mining and gaming on the R9 290X and 390X, they usually run in the mid 80’s the entire time!
Tell me how the BIOS works… my cards have been rock solid.