well, by CPU voltage i assume its the vCore, which is normally 1.22v or so, maybe more if its been overclocked, but increasing the vCore increaes performance of the CPU right, but it also makes it run much hotter
but i mean there must be a mistake in the way nVidia Monitor is reading that voltage because 1.5 is high!! it would surely lead to the computer shutting down because of overheating with stock cooling