Thanks for the details Simon.
If the chip is rated for 5years at 500GH, why is the warranty only 10 to 30 days?
Because with open source software, and overclocking we don't know what people will try and push these things to do.
Another quick question.
Regarding the on chip thermal control listed in the blog:
https://hashfast.com/thermal-control/Is this thermal control done inside the chip automatically, or does it require the driver/cgminer to throttle down the chip?
edit: I see my question was already answered by you right above my post. TL;DR - Sensor and driver work in tandem to seek peak performance of the chip.