CPU Temperature 135F normal?

[LordGorzul]

I'm running a 3.0Ghz P4 machine with 1gig Ram, INTEL Motherboard, two 80gig Sata HDDs a 128mb ATI Radeon9800 etc.

For the first time ever I came back to my PC only to notice that it was off, when it went back on I got a message saying that my PC shut down due to high CPU temperatures. My case is 450W PSU with 4 Case fans in addition to the CPU one of course.
The CPU Fan is relatively clean and is functional, so are the rest of them.
In BIOS it says that CPu temperature is 135F - 57C.
That seems a bit high to me, am I right?
And even though I opened the case for 15 minutes, the CPU temp didn't move at all.

Is it high, why is this happenning all of a sudden, and how can it be solved?

Thanks a bunch.

LG.

PS: And by the way, I am not overclocking anythign in there !!

 

[Kakumba]

check your HSF mounting? take it off, give it all a clean and some fresh Artic Silver. if still high - beats me. If you werent overclocking, then I would be surprised if your voltage increased or soemthing...

And yes, that seems a bit too warm for my liking.

 

[BassBomb]

if its a prescott, thats not too high, if its a northwood then yes it is pretty high..

 

[AzNPinkTuv]

load or idle.. my northwood reaches that temp on load but then again i have a sff so its higher

 

[potato28]

What size fans are they?

 

[LordGorzul]

It's the fan that comes with it. The temperature I gave you was idle. Today it seems even higher around 150F - 67C
That is the weirdest thing.
I've done nothing new lately. I've gotten this BurnIn Test Software to test my PC it gets half way thru and restarts my computer.
I can't figure out what wrong. Also, anytime I quit a game like FEAR, my PC restarts on its own.

 

[Arkane13131]

if its idling that hot you need to take off the heatsink clean it.. clean as much thermal compound off of the cpu as you can aswell... reapply (preferably some arctic silver5) and reinstall.

or you can get a can of air duster and blow all the hairballs out of your heatsink.

also check the booted in windows temp using everest or something.

 

[aboothman]

stock intel heatsinks suck, so do not expect your temps to be very low. It does sounds like you have some dust issues tho. Do as Arkana said above.

The suggestion to check your idle and full load temps is a good one too.
If problems persist, try an aftermarket heatsink, such as an XP-90 or a Zalman CNPS 7000 or whatever it is.