What is the normal temperatures for laptops?

im using a desktop with only the processor fan and the power supply one, im getting readings of 37° -42°

how does this compare to laptops? are they a lot higher?

 

What are you measuring? CPU and HDD on a notebook do run hotter.

 

GPU should be the hottest one.

 

yeah um, i think the one in my desktop is integrated..so do i just look at the motherboard's temp?

 

It depends on the GPU and CPU. Some can run much hotter than others.
A cpu from the T7 series and above and equivalent AMDs are safe up until 70-75C, whereas some GPUs can work nicely up to 85-90C, but a safe zone is anything below 80C.
For Integrated GPUs, they run much cooler, so below 70C should be ok.

 

dosen't running at such a high °C lowert he lifespan?

 

It`s not high, T series CPUs from Intel are mostly rated safe until 100C.
Higher temps means less lifespan, true , but from 70C to 100 is like 50% more heat So 70C is actually pretty healthy,and it`s not like it will run 100% load all the time to hit that temp.
Some GPUs can go as far as 120C(the 8600M GT ddr3)

 

Varies greatly... I had an old mobile Pentium 4 that would run at around 80C and start frying components. My T7500 reached around 79C before undervolting which was perfectly fine, but now it maxes at around 66C during gaming. If doing simple media encoding, I peak at 61-62C. GPU is 65-70C.

Then there's the Asus laptop that makes testicle hush puppies it's so hot, can't remember the model off the top of my head.

 

My T7500 also reached 79 with Orthos and I`ve undervolted, now stays below 65 when stressed and at about 55-60C when gaming hardcore
My GPU also stays below 65C , but it`s not really relevant.
The G1S for example withstands amazingly high temps, 95C for the GPU, so does the m15x.

 

I guess it's all depends which laptop. ie my MBP cpu stayed at 60C when idle, but the new 5793 never passed 54C even I OC to 2.9Ghz 100% load.

 

I think my GPU is what contributes to my high CPU temps when gaming. When doing a CPU stress test, I get lower temperatures than my peaks during gaming. Probably the way my system is physically assembled. (My undervolt is .9875 @ highest multiplier).

 

One thing to note, it may not be your case, but some laptops have only 1 fan, even with dedicated GPUs/
My NX9420 for example with an Ati X1600 has a fan only for the CPU, so the gpu tends to get hotter.

 

Well I know mine only has 1 fan, that's why even when at intensive media encoding, it runs cooler because I have a 45C GPU instead of 80% CPU usage during gaming with a 65C GPU.

 

So I think the fan is beneath the CPU?! It would make sense to be so...since CPUs cool off and heat up really really fast.

 

They are quite a bit lower.

Laptops are tested by the manufacturers for environmental operating temps, but thats a different thing. Furthermore, each individual part (CPU, GPU, HDD, RAM) are rated by their manufacturers (AMD, Intel, Hitachi, Intel, etc) so that customers know the exact specifications of the product, and what to expect from these products.