Question regarding power consumptions ???

Software voltage readings are not reliable. If your 3.3V was really at 0V, your computer would not function. You need to measure with a DMM.

Come on guys. Yes the volt meter is the most accurate way to check, but software can give you a rough idea. The problem with speedfan is the lack of updates, so while it took the readings, it put them in the wrong place. He does have a 3.3V reading, its the second Vcore value. (the E6600 has only one power plane, so can't be two vcores.)

Assuming these are at load values, you should be alright. The 12V is a little low, but again if this is at load your not to bad. 11.7 is still within spec. If this is at idle, then I would get a volt meter and check it under load. If it gets near 11.4v, you have a problem.

If these are idle values, your temps are high. My E6600 gets to 45c at load, I've never seen it higher. (idle temp is in the low 30s.) 48c won't kill it, but it seems high to me, very high if this is at idle.

His isn't that off. Anything that off should be double checked. Anything boardline should be double checked. But if the values look good/close, why go through the hassle of confirming?

We've had this argument before, I'm not going into it again. You feel that only volt meters are good enough, I disagree. I'm not saying volt meters can't be used, but I see no reason to use one if the software says all my values are good, and I'm not having any weird issues.