Aurora R8, gaming 6-10 hours, will it overheat?

So I am looking forward to buying this pc (Alienware Aurora R8 gaming desktop). But I need to know what to do when it overheats and how long it takes to overheat? The reason I need to know is because I play on laptop as of right now and I really play for long periods of time. I’m talking around 6-10 hours of gaming. That’s why I need to know.

Also I need to know how long to play you know since I play for so long. Anyways, I play fortnite and the graphics are amazing and the FPS gets to around 500 to almost 600 which is way more than I thought. That’s why I’m looking forward to buy this gaming pc. Thank you Alienware if you see this and reply I just need to know when to stop playing and how long it takes to overheat and also what to do. Thank you so much Alienware again for inventing this amazing product.