i5 vs i7 3rd gen. thermal issues

[tarmiricmi]

Hello,
I'm using Lenovo Thinkcentre M92p with i5 3550. I've upgraded CPU to i7 3770. Nothing is overclocked.
With i5 I get 25C idle temp, with i7 30-35.
i5 load temps are 45-50, i7 55-65.

All parameters of the machine being completely the same. Same thermal paste properly applied. Case is well maintained without dust.

Why the i7 develops higher temperature? Performance wise, it is somewhat better, but maybe 5-10% at best.

 

[dudeman509]

Hyperthreading. Slightly higher clock/turbo speed. Sounds normal.

 

[Supahos]

Yes that's about what I'd expect. Max temp of those CPUs is 100C you're fine

 

[tarmiricmi]

Well according to specifications they both have 77w tdp.
Would it help to install heat-pipe cpu cooler (currently there is Lenovo aluminium one, a little larger than Intel's stock)?

 

[Supahos]

They just throw a number on them when it comes to tdp. Did you upgrade the CPU and reuse the same cooler?

 

[tarmiricmi]

They just throw a number on them when it comes to tdp. Did you upgrade the CPU and reuse the same cooler?

Yes, same cooler.
When I turn off the HT, temps go back 5-10 degrees, which is ridicolous because they're just logical, not real cores.

 

[Supahos]

They aren't "logical" in the sense that they aren't really there and really doing work. That produces heat. Did you reapply thermal paste when you changed the CPU.

 

[tarmiricmi]

They aren't "logical" in the sense that they aren't really there and really doing work. That produces heat. Did you reapply thermal paste when you changed the CPU.

Thermal paste is reapplied properly.
If I were sure that the another CPU cooler would lower the temps, I would invest in that.

 

[Supahos]

The stock cooler is never the "best option" but the temps you're describing are a long way from unsafe. I'd just let it stay as is

 

[KirbysHammer]

As others have said I can confirm you're fine.

HT is basically a way to force the CPU to do more work with the same components. Therefore it produces more heat and uses more power.