Question Why does my cpu only use 40w?

[Marci_06]

My cpu (i3-9100f) when i use it in 100% only use 40w but the processor's tdp is 65W which is (as i know) the normal wattage usage. What's wrong? Here is the picture:

https://imgur.com/a/IZWrURv

View: https://imgur.com/a/IZWrURv

 

[RodroX]

Whats your RAM brand and model and configuration (how many dimms, what size, and dual channel or single channel)?

Also it wont hurt to run https://www.userbenchmark.com/ test and share the full result link with us.

 

[DRagor]

TDP is measurement of how much heat your CPU can generate. It does not mean it will draw same amount of power from PSU.

 

[Nighthawk117]

My cpu (i3-9100f) when i use it in 100% only use 40w but the processor's tdp is 65W which is (as i know) the normal wattage usage. What's wrong? Here is the picture:

https://imgur.com/a/IZWrURv

View: https://imgur.com/a/IZWrURv

What's your clock speed when the CPU is running at 100%?

 

[Marci_06]

What's your clock speed when the CPU is running at 100%?

4.2GHz turbo boost.

 

[Nighthawk117]

4.2GHz turbo boost.

It should be running at 4Ghz on all cores when it's fully loaded. If it's doing that then it's fine. I found my Intel chip undercut Intel's official TDP. Also what load your running will have an impact, if you run an AVX2 stress test then it will consume more power. Not sure if your AIDA64 is doing that.
It's also not clear to me if the 44.77W is the current package power or the maximum it reached during the test.

 

[Deeeeerek]

haha, so it's your laptop right?
The laptop gives a power cap of 45 Watt (Limited power budget due to thermal limitation).

So the Intel's spec is 65W, but computer makers will give another limitation due to thermal limitation.

 

[Nighthawk117]

The i3 9100F is a desktop CPU.

 

[coolraveen]

TDP is measurement of how much heat your CPU can generate. It does not mean it will draw same amount of power from PSU.

So does it applies to GPU also, like my 1650 Super is rated at 100Watts but only reaches 85watts in most gaming?

 

[Deeeeerek]

O, you are right. But 45W looks like a power cap for laptopPC.
Marci_06 you can check the bios, is there any power cap relative settings

 

[DRagor]

So does it applies to GPU also, like my 1650 Super is rated at 100Watts but only reaches 85watts in most gaming?

Nope. I have yet to see GPU specification that would list TDP - and the reason for that is it comes with its own cooling so TDP is irrelevant. It would be meaningful only for those models that are made for custom water-cooling loop (as they don't include cooler).