What is Letting My PC Down? I have little knowledge of computers and I was wondering whether I need to upgrade my processor or graphics card to allow me to run counter strike go faster, as my pc only handles about 100 fps which is not very good for cs and is currently infuriating me

Processor: Intel Core I7 CPU 870 @2.93GHz 2942Mhz, 4 Cores
Graphics Card: Asus GeForce GTX 760 DirectCU II OC Graphics Card - 2GB
Total Physical Memory: 12Gb

I really don't understand why my computer runs cs so badly now: I used to get 300fps

Thanks in advance