Originally Posted by chiknnwatrmln
High VRM temps (>80c) can negatively affect overclocks. They can generally reduce stability, and make the card draw more power because the VRM's are much less efficient when hot. For example, my last PC drew about 410w under full GPU load when cold; when fully warmed up (core ~ 60c, VRM 1 ~ 80c) the PC would draw about 430w.
well generally yes, in overclocking you want everything as cool as possible, though VRM efficiency doesn't change as much as the core, but it still increases OC stability from better voltage filtering by keeping them very cool (under water or sub-zero).
saying that though, you don't want your chokes too cold or they stop resisting the right amount of power and you'll overvolt uncontrollably. only really a problem with nitro and helium though.