Are your games running well? If so I wouldn't worry about it, a 600w is easily enough for your computer build. Also download a different temp monitor to be sure. But the idle temp doesn't make sense to me. The lowest it could ever make sense is 23C because that is about room temperature. If you have an air cooler, your cpu literally couldn't be that low.
Unless your case temperature is literally 10c below ambient temperature (you would have to be running a fridge or something next to it), there is no issue with a rig being too cool.
On start-up you can often get very low temps. Occasionally when I start up on a cold day, one of my cores can hit zero. A true idle temp would be 20mins of just looking at the desktop, after its been on for 5min or so.
according to this link having a computer start realy cold can cause
the hardware to fail(is realy cold consider 12C or below?)
If you take a PC that is at freezing temperature and plug it in, it will warm up very quickly, much more quickly than it would if you left it on a table to warm up in its own time. In some cases, you can raise the temperature of equipment from 0 degrees to 150 in only a matter of minutes. As discussed here, thermal stress is a leading cause of premature failure of electronics components. This is bad enough when the components are raised from 70 degrees to 150; when they are raised from 0 to 150 it is much worse.
it seems i found this info from core temp themselves.....
Why is the temperature of my Phenom based processor lower than the ambient temperature?
Starting with the Phenoms, AMD's digital sensor no longer reports an absolute temperature value anymore, but a reading with a certain offset, which is unknown. It is estimated that this offset is between 10 - 20c.
i know mine is FX but could it be the sane issue?
if this is true then my actual temp is 32C which seem smore likely and should i take it like this?
and if thats true then that means my CPU use to run at 70C?