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Another classic blog post on this topic that I like coming back to: https://www.codeofhonor.com/blog/whose-bug-is-this-anyway - specifically the "Your computer is broken" section. Apparently Guild Wars ran some computations in the background with a known result, and if those computations didn't yield the correct result, the game would inform the user about a potential hardware fault.

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If undervolting is the new overclocking, you'd have to wonder if that changes anything.

For some years I run Win2003 on my home PC, both in overclocked and underclocked modes (Tualeron 1300 if this tells you anything).

In the underclocked variant (cooled only by one 80mm fan pretty far from the CPU) I pretty quickly started to recognize the program crashes from the CPU overheating alone.

In both cases the reason is too much heat undissipated, but underclocking, in some extreme situations, exhibit the same "undef" behaviour as the overclocked systems.

I had the Tualatin Celeron 1300 too (good times!), but I've never heard them referred to as Tualeron until today!

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