New Mobo/CPU Tempature question

Just upgraded my system from an athlon 1900+ xp to a new asus p4p800 mobo and a 2.8c p4 cpu and am having a hard time believing my tempatures.
I installed a zalman 7000-alcu heatsink using some artic silver ceramique(sp?), and now asus probe is saying my cpu idling temp is at 25c and mobo temp is 28c

My Athlon used to idle at like 42c with a volcano 7+ jet engine on it, I can't even hear this zalman running so these low temps with no noise are freaking me out, lol. Is that a normal temp for P4's to run at or is asusprobe lying to me?

the ambient temp in my case is reading 84.5 F on my LCD display and I have a side fan blowing directly on the HS

I thought Amd XP's were suppose to run hotter than p4's just didn't think it was this much of a diff.

Anyway,

I just installed motherboard monitor 5 and config'd it for my mobo and it says about the same thing, 26c idle for the cpu and 29c for the case. I ran 3dmark03 a couple times with asusprobe runnin then mbm 5 running and under load cpu hit ~34-35c so I guess the probes are right and its time to overclock it tomorrow =)

I use the same chip (2.8C), the all-copper version of the Zalman & a DFI LanParty Pro875B mobo. My temps are also in the same range. When I reported them here I was told it's impossible. HOWEVER, I've measured temps every way possible & the results are the same. It's good to see someone else reporting the same temps (albeit w/ a different mobo).