why does my games all of a sudden lag so much?

[Someguy22]

Hey guys I have been wondering why does my pc lag so much I haven't installed any new hardware just a few new games and i have games that are old and wont work well i even have games date since the 90s they lag too my pc overheats too much and usually I doesn't

Pc Specs
Windows 7 64bit SP1
Intel Core i7-4770
CPU @ 3,40 GHz
8 GB of ram
Geforce GTX 670 but i dont know why but it says Intel hd graphics 4600

 

[coastie65]

You are running from the Integrated graphics on the processor and the reason it is Showing that. Go into your Device Manager and make sure the HD4600 has been disabled and the GTX 670 has been enabled.