First off, please clean your machine - excellent videos on YouTube and make sure you have a copy of your system/motherboard manuals.
You may wish to review performance of your video card against benchmarks, but I couldn't find it ... being precise when asking for help is really useful, you know.
Need full description of system. Maker, model number and version.
OS
Motherboard
CPU (plus frequency)
RAM (plus amount)
PSU (plus wattage)
GPU (plus amount VRAM)
Monitor(s)
Storage (types, sizes)
Also need list of key games you wish to play and at what speed (30, 40-50 or >60 fps) .
Please provide a rough idea of where you are and what you can afford. That way we won't recommend something that costs a year's income or requires transport through hostile territory.