Question While playing certain games, computer screen goes a random color and makes a buzzing noise ?

[riomonst4r]

Hello recently while I was playing VALORANT and Roblox and randomly while I'm playing, my pc would just make the display go black then a random color but when i play other games that run hard on my computer like apex legends or fortnite it seems to work fine.
I am very confused and frustrated when this happens because i have to manually turn the pc off buy the power button .

my Pc specs are:
CPU: i5-2400
RAM: 12gb
GPU: GTX 760 4gb vram
PSU: MWE white 550 230v
Mobo: H61M/U3S3 asrock

 

[Nine Layer Nige]

Things might be getting hot. Maybe that old GTX 760 need a repaste/de-dusting ?
How are your temps ?

 

[riomonst4r]

Things might be getting hot. Maybe that old GTX 760 need a repaste/de-dusting ?
How are your temps ?

thank you for the suggestion I just got a new case with far better air flow and good cooling the problem does not seem to happen any more .