100% gpu load

Hello, I am speaking to you here because I have had a problem with my PC for several months, this problem generally occurs after several hours of use. When this happens, my clock at the bottom right of my screen freezes and it is no longer possible to perform any actions on the operating...

I am planing to buy a pc for me to play only dota 2 and csgo. I am tight on my budget so i am going to buy i3 8100 and play dota 2 and csgo with hd 630 I will upgrade my pc later when i have money but for now i am not buying gpu. So i was wondering will i be okay to play dota2 and csgo wih hd...