CPU/GPU temperatures

I bought a Dell Inspiron 17r Special Edition last year around December, i purchased it for mostly gaming and general usage. I recently just bought Battlefield 4 and playing it on medium graphics, along with setting the maximum processor state to about 70% or 75% depending on the need. this is causing the temperatures of my CPU range from 87 degrees Celsius up to a max of 90-91 degrees Celsius.

My question?

temperatures reaching to about 85 degrees Celsius up to 90-91 degrees Celsius and remaining at those temperatures, is it safe for such temperatures to remain for 20 minutes or even in excess of 1 hour or more during game-play.I am concerned about the life expectancy of my CPU and GPU. I am unaware of the loads a 3rd Gen Processor can handle and for how long before it causes damage or will affect the life or performance of my laptop over the upcoming weeks,months or possible years.