I have a Toshiba Satellite L755 laptop with an i3 2350M processor; CPU-Z shows the technology as 32 nm. I got this laptop in 2012 and have been using it sparingly since October last year, when I got a new Dell laptop.
The i3 processor has always run between 45 and 50 degrees for as long as I can remember; I don't remember ever seeing it drop below 40 degrees. Sometimes it goes up to 60 and even 70 when under load.
The Dell laptop I bought last year has an i5 4200U processor; CPU-Z shows the technology as 22nm. SpeedFan always shows its temperature at around 30 degrees; the fluctuations are generally + / - 5 degrees, but most of the time its at 29 or 30 degrees.
When I had bought the Dell i5 laptop, I had thought that since it has a more powerful processor, it would run at higher temperatures. Instead, its the other way round.
Is it because it is newer technology? Is it also because Dell does something to bring down temperatures that Toshiba doesn't? I've already run a blower to remove dust from both laptops.
Is the 45 to 50 degree temperature normal for the i3? The reason I'm asking is because I want to download the offline Wikipedia; last time I downloaded it, it was around 9 GBs (compressed file). On the 1 mbps connection I have, it will take many hours, and so I thought I'd download it on the Toshiba laptop since its old and I've busted its battery by using it too much while keeping it connected to the power line. It is only when I ran SpeedFan on both laptops that I noticed that the i5 is cooler.
The dell laptop is having 4200U processor which is ULV processor that runs at 17 watts the processor of thosiba uses a 35w processor . You may feel the toshiba laptop may run hotter as it uses a processor that consumes more power and also its 3 years old and the thermal paste might have hardened and some dust might have accumulated in its fan.