Regarding system stability (Vcore and temperature)

I have read some other posts here with regards to vcore varying underload.
But my CPU fluctuates from 1.14V - 1.28 (though 1.28V only lasts for less then 10 seconds). But this happens occasionallly. Normally values are around 1.14V
What about the other voltage readings and temperature values? Are they reasonable for a non overclocked machine

3V rail = 3.33V
5V rail = 5.09V
12V rail = 12.14
CPU temp = 40 Degrees C
MB = 26 Degrees C

Here are my comp specs:

E6600 2.4GHZ
Enerma PSU 535W 34A total on 12V rail
ASUS P5B deluxe motherboard
ASUS EAX1900XT (ATI) graphics card
Antec Nine Hundred Case

Programs used to look at vcore change

ASUS probe 2 v1.04.05 (look at rail voltage readings and temp_
CPU-Z