I haven't really monitored the voltages in my computer too much, but recently, I've noticed through Speedfan that my system's Vcore jolts from 0.91V to a maximum of 1.19V when under load. I don't know if this is normal or not, as I haven't really looked at this stuff before (I've only built my first computer around two months ago), so I was wondering if this should concern me or not.
The following was what I saw on Speedfan. The increases only occurred when I ran something like Google Earth.
the cpu will require less power (thus voltage) when it isnt being run hard. and usually things arent a perfectly constant load, there may be a little fluctuation. your pc is too new to be suffering from bad capacitors, so i think your pc is fine, as long is it is operating normally. is it?
Okay, well, that's a little more settling. However, I've been looking at the +12v measurements on Speedfan, too, and while it usually detects 11.51V, I've seen it drop to 11.45 a couple of times on the chart, too. Unfortunately, I didn't take a screenshot of that chart, but I was wondering if that fluctuation is nearing dangerous territory, as I've heard that the threshold for straying from that 12V is +/-5%. This fluctuation happened as I was playing Starcraft II.
speedfan is a nice litle program but its really unreiable and inaccurte for any voltage measurements. break out a multimeter and actually measure the real voltage coming out of the ps (at a molex plug)