I would say the cause of what seems like freezing to you is in fact the i3 Intel cpu down clocking in speed it is running at, and voltage fed to the V core of the cpu it`s self in an effort to keep the chip cool and to even keep the chip with the stock Intel cooler fitted to it to 75 or 80c.
I3, I5 and I7 Intel cpu`s have a max TDP of the cpu at around 104c as the max where it should thermally force a complete shutdown of the system, to prevent damage to the Cpu.
My advice is if you have a system case, tower based upright system.
To remove the side panel of the system case completely till you get a better Cpu cooler for the i3 chip you have such as a Evo 212 cpu air cooler of a larger size to lower the cpu temps.
It will make a...