Thank you for contacting the Intel Communities.
I understand that you would like to know why your processor is working harder than your friends processor.
As per the information provided, your system is running the Intel HD graphics, no dedicated GPU in the system.
The processor is the one handling graphics with that configuration (no GPU), this would be the reason why your processor is working harder than your friend's which has a dedicated GPU.
For more information regarding Intel HD graphics, refer to the links below.
Do not hesitate to advise me if you have further questions or concerns,
Hello X0du$ :
If a dedicated GPU is added to the system, the processor would stop providing with graphics to the computer, which would reduce the usage of the processor.
You can play video games that this CPU can run alone without having any trouble or damage, if the temps are under the TCase (72.72°C) they are ok and shouldn't harm your processor.
More information about your CPU: Intel® Core™ i5-4440 Processor (6M Cache, up to 3.30 GHz) Specifications