When I run game on my laptop cpu used going to 70 to 80% why ?

[15-r237ne]

Intel Core i7-5500U (5th Gen)
NVIDIA GeForce 820M (2gb)
8 gb ram
DDR3 1600 Mhz

When I am start the game my CPU used going to 70 to 80% in task manager 

I don't know why I have a good configuration

I am check already checked background applications and disable

So please help me what I need to do do I need to upgrade the RAM ?

[banhien]

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@15-r237ne wrote:

... When I am start the game my CPU used going to 70 to 80% in task manager

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@15-r237ne

Games require all a lot of resource of machine from CPU, GPU, RAM, fans .. That why CPU will shot up when you start a game and that is normal.

In your case, machine uses the Intel Graphics first. Upgrade RAM may help but CPU will not go down much.

Hope this makes sense,

Regards.