there is no standrd idle temperature of a CPU. The temperature depens on your room temperature, the CPU's VCore and the cooling you use!
My room temperature for example is about 18-20°C, I use and Thermalright SLK800 Heatsink with a Delta 80mm EHE [email protected](~2600 RPM), 4 Sunon 42CFM(rating at 12V) Case 80mm case [email protected] and a 120mm Delta 107CFM(rating at 12V)fan, also @7V.
My idle temperature of my Celeron 1,0 GHz A at 1,33GHz with 1,35V Vcore is about 29-30°C and my full load temp is about 35-36°C!
If you want to passive cool such a Celeron 1,1GHz CPU at it's standard speed, then just keep in mind that you have to lower the VCore to get acceptable temps. For example I can run my Celeorn 1,0 Ghz stable at 1,2V Vcore with very low temps --> it could be passive cooled at that speed and shouldn't exceed temps of approximately 50°C at full load!!! Your idle temp should be about 40°C if you passive cool your Celeron 1,1Ghz @1,2V Vcore, I think.
Thanks for the info Ingo.... I just recalled once reading the idle temps for P2's on a spec sheet on Intel's developer pages.. surely from some point of room temperature.
Nevertheless, it will be an interesting task to passive cool the thing, when I read your temps.
My room temperature is around 20-22 celsius, I've opted for a rather challenging setup for the celeron.
Chieftec Dragon Micro ATX
MSI MS-6368 micro ATX board
Tualatin Boxed... until I find the right cooling profile
Seagate Baracuda 120 Gb (low idle temp according to storagereview)
Its a bit of a challenge I think, due to the fact that its a very small case. But then again it has onboard graphics, nic and such. Oh... btw.. Its supposed to run as a server only... so it probably never will reach 100% CPU load... hardly over 10% under normal circumastances.