Upon installing of Ubuntu, it says my CPU temp sensor is unreliable - do I just ignore this and keep going? CPU seems just fine, and the heatsink isn't very hot to the touch. and monitoring the temp in the bios returns a reasonable temperature of 41c-50c.
(I bought a MOBO that included some ram and this Phenom CPU for like $15 on ebay, claimed to be fully working. However this is ebay, you never know.)
Your question seems to be “does this claim of an unreliable sensor signify a deeper problem?” Might need specifics for that one.
With a price that low it may depend on what you are doing with it. It’s not a sensor who’s behavior I would necessarily trust which could affect its behavior with failsafes that read it. Perhaps best not to push it very hard.