Download GP-100% power Consumption 30% During the games?

After any game will not close properly. Ie if I close it via task Manager or it simply will fly, then launch the game will be Zagruzka GP 100%, energopotreblenie a maximum of 30%.
The temperature is kept at 30 grodash, thus strongly falls FPS, stable 20-25 fps. Checked for viruses, nothing found.
Updated the driver, I endured did not help. What's the problem?
P. s This problem is treated by reboot of the computer. If she's out(the Game) that will start all the same