Hi,At idle my P4 2.8 CPU shows about 42 degrees C. With FS2002 running this rises to 52 degrees. Is this too hot ? I've heard that the P4 starts to throttle back its speed as the temperature rises. Does anyone know at what temperature that occurs ?Thanks,Pesi

Thats not too hot at all. My Athlon 1.2GHz is at 145F (63C) at idle and can go to about 160F (71C) under heavy load (UD). That is a bit toasty, but for a year+ now at those temps running stable, it don't seem to harm anything.As far as I know, the P4 starts to throttle back if it detects a major change in temperature in a short time (something like fan stopping on the heatsink).

you are both wrong, P4s shut the system down or restart depending on the mobo when they get too hot. and zack, thats wayyy too hot unless you have a thoroughbred core. but that will do damage in the long run. and i have a [email protected] right now, it says 3.4 in my sig, but its summer here so i have it running a bit slower, 50C is what mine gets to and 50C is about the limit many people will say, but 52 isnt too high, if you are a real saftey freak, get better cooling because you could get your load temps down to maybe 46C on a 2.8 if its 2.8 stock that is. if its overclocked thats about right. but get a good heatsink, like an Alpha PAL8942 or a swiftech SLK-900 mmmm, copper, and a high quality fan and your should be ok

Hi,Thanks for the replies. It is a stock P4 2.8 (No OC) with the retail version fan from Intel. I could get better cooling but dont know if it is worth it.Pesi

Zack likes er' hott, donthca' Zack?

Those temps are fine Pesi. The P4's will start to throttle back somewhere in the range of 68-72C (depends on the model). And they will completely shutdown before they self-destruct. You can get the exact information for your CPU from the thermal design specs for the P4 at the Intel website. Unless you're into extreme overclocking the standard Intel heatsink/fan combination is fine. In fact, it's amazingly good. Many of us are running a 500Mhz overclock with the Intel HSI without any temperature issues. As an example, with 100% CPU utilization (as with FS2002) my P4 2.2Mhz runs at 51C with the FSB at the default and 57C when OC'd to 2.7Mhz - not a problem at all.Doug

>you are both wrong, P4s shut the system down or restart>depending on the mobo when they get too hot. and zack, thats>wayyy too hot unless you have a thoroughbred core.Um since when do P4's have a thoroughbred core?? ;( but that>will do damage in the long run. and i have a [email protected] right>now, it says 3.4 in my sig, but its summer here so i have it>running a bit slower, 50C is what mine gets to and 50C is>about the limit many people will say, but 52 isnt too high, if>you are a real saftey freak, get better cooling because you>could get your load temps down to maybe 46C on a 2.8 if its>2.8 stock that is. if its overclocked thats about right. but>get a good heatsink, like an Alpha PAL8942 or a swiftech>SLK-900 mmmm, copper, and a high quality fan and your should>be okInvest in a good case fan or 2 and you can run 46-48 all day long with the stock Intel cooler. My 3.06 never gets above 50 w 100% load w the stock Intel cooler. Unless your OC'ing it there is no need for the noise or exspense involved in putting the Alpha in.Bobby

Thanks for the information. I'll keep things as they are.Pesi

>Um since when do P4's have a thoroughbred core??http://hifi.avsim.net/activesky/images/wxrebeta.jpg

After rereading it a second and third time I finally got the wording correct...Makes more sense now. Although thats hot even for a thoroughbred core. :)Bobby

I would say thats fine Pesi, My 1.6 P4 runs from 35 to 36 at Idle. After hours of heavy flying in FS the highest I have seen it go is 49. I just have the stock fans that came in my HP Pavillion.Chris