That shows your CPU's clock speed at 1ghz (1000mhz), and judging by the multiplier, I'm guessing you have Cool N Quiet enabled. Thats all good since all it does is lower your CPU clock speed when you don't need it (and you usually won't unless you fire up a game or an intensive application).
With that in mind, an idle temp for a CnQ AMD64 running @ 1ghz is normal to be very low.
However, @ 2.8ghz the idle temp would be alot higher.
Not only that, but its hard to see how you overclocked your CPU to 2.8ghz with
A) CnQ enabled, since once you've changed voltages or the HTT CnQ is automaticaly disabled
It would seem the memory your using would have a very hard time of reaching 255mhz
C) stock CPU cooling
Either way, what are your load temps @ stock (2.2ghz) or OCed (2.8ghz?), load temperatures are what really matters as it shows what the maximum temperature your CPU is reaching.
Also make sure you have the latest motherboard BIOs so that it is reporting the correct temperatures.
AMD64 3500+ Newcastle
Asus A8V Deluxe
ATI X850 Pro @ X850 XT
NEC 3500 16x DVD
470W Enermax Noisetaker
Viewsonic VP171b 17" 8ms LCD