I bought a GTX 750 ti single fan from Aliexpress after installing it to my pc, the pc got extremely slow. I installed GPU drivers & restarted PC. It took around 10 mins to boot than I uninstalled the GPU from the pc. after removing GPU the pc was still slow like before while GPU installed, then I removed my Hard disk & reboot the pc (OS is installed on SSD) but this time it worked fine like it was before no hanging nothing else, then I Installed the HDD & GPU again but this time everything worked fine but when I checked the health & performance status the HDD performance dropped to 94% (Check the screenshot below) I am using Hard Disk Sentinel to check status, also pc became a little bit slower as compared to it was before installing GPU for the first time.
PC Specifications:
Core i5 2300 @2.80GHz
Asus P8H61-MX R2.0
2x4GB DDR3 RAM
Kingston 120 GB SSD
500 GB Seagate 7200 RPM HDD
300watt PSU
https://imgur.com/a/zuEhQWV
PC Specifications:
Core i5 2300 @2.80GHz
Asus P8H61-MX R2.0
2x4GB DDR3 RAM
Kingston 120 GB SSD
500 GB Seagate 7200 RPM HDD
300watt PSU
https://imgur.com/a/zuEhQWV