Question my pc is underperforming massively

May 9, 2020
Hi everyone hope your day is going well I am relatively new to pc and am having trouble with it I can barely get 100 fps on cs and struggle to play other games such as sea of thieves Forza 4 destiny 2 etc I was wondering if someone could try point me in the right direction on fixing this I ran a test on user benchmark and got awful feedback
User Benchmarks: Game 61%, Desk 59%, Work 45%

CPU: Intel Core i7-3770K - 60.7%
GPU: Nvidia GTX 980-Ti - 66.3%
SSD: Intel 520 Series 120GB - 64.8%
HDD: Seagate Barracuda 7200.14 1TB - 110.7%
RAM: Kingston HyperX DDR3 1866 C9 4x4GB - 46.6%
MBD: Gigabyte GA-Z77X-D3H
they are my specs

My issue is I keep getting major fps drops and spikes in games I should be hitting at least 150 to 200 fps on I'm honestly struggling to find out why its underperforming as I've searched everywhere I possibly could for a workaround.

thank you also can provide anything else needed