Fast Computer Started Running Slow After Changing Displays,

[WaddleDoo]

Hello! My computer is a custom computer that I built, and it has been running extremely fast until last night. I moved it downstairs to attach it to the television, and upon doing so, things started running very slow. Now it is back upstairs and on its original display, but it is still running extremely slow. I tested my theory by playing a game that I had just played the day before, running flawlessly at 60fps, now when launching the game, I cannot even get past the menu screen because of lag. What might've happened and how can I fix it, please help!!

 

[rgd1101]

full system spec?

 

[WaddleDoo]

full system spec?

System Name DESKTOP-USOHPM0
System Manufacturer MSI
System Model MS-7922
System Type x64-based PC
System SKU To be filled by O.E.M.
Processor Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz, 4000 Mhz
BIOS Version/Date American Megatrends Inc. V10.4, 4/15/2015
SMBIOS Version 2.8
Embedded Controller Version 255.255
BIOS Mode Legacy
BaseBoard Manufacturer MSI
BaseBoard Model Not Available
BaseBoard Name Base Board
Platform Role Desktop
Secure Boot State Unsupported
PCR7 Configuration Binding Not Possible
User Name DESKTOP-USOHPM0\Micah Schultz
Time Zone Central Daylight Time
Installed Physical Memory (RAM) 8.00 GB
Total Physical Memory 7.89 GB
Page File C:\pagefile.sys
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware Yes
Hyper-V - Data Execution Protection Yes

 

[WaddleDoo]

I believe Ive fixed the issue!
I accidentally connected my monitor to the default back panel and not to my graphics card