I repasted one of the chips, because I had pried open the heatsink to take a picture.
Arctic Silver 5 is not a conductive thermal compound so you are good.
Arctic Silver 5 is not a conductive thermal compound so you are good.
Not Electrically Conductive:
Arctic Silver 5 was formulated to conduct heat, not electricity.
(While much safer than electrically conductive silver and copper greases, Arctic Silver 5 should be kept away from electrical traces, pins, and leads. While it is not electrically conductive, the compound is very slightly capacitive and could potentially cause problems if it bridges two close-proximity electrical paths.)
Here is what it should look like after:
This is the mess that was before:
