I brought My PC last year on the 1st of January 2020, however, since then I wasn't really able to play games properly on the pc due to exams and other problem recently I have started playing heavy games on my pc and have noticed severe lag (I have posted a video exhibiting the lag) Link:- GPU usage fluctuating. - YouTube MY PC SPECS ARE:- CPU - I7 3770S GPU- RX 580 HDD- 500GB (Games are running from HDD) SSD- 128GB (OPERATING SYSTEM IS ON SSD) Mobo- H61 Dual slot Ram - 8GB (4x2) Power supply- 550W Silverstone THINGS I HAVE TRIED Reinstalling the windows Updating the drivers ( i deleted them also then reinstalled them) Watched every video on the internet and trying what they say yet of no use 4. Tried playing on different settings like ultra, high, medium, low etc.tried it with VSYNC On and off NOTE:- it happens in all games like horizon zero dawn, assassin's creed origins, Forza horizon 4 etc NOTE:- I have like run GPU benchmarks yet it shows 100% usage in them and it does not fluctuate in them and secondly the frametime also fluctuate when GPU usage spikes MSI AFTERBURNER GRAPHS - HHD (HARD DRIVE) SSD (SOLID STATE DRIVE) Would really Appreciate any type of help. Thank you in advance for taking time out of your life and helping me. PEACE!