I have recently boxed my tower unit in a little bit to hide all the wires and make things look neat. I am a little concerned about causing heat problems as the back of the tower unit, which by design is where the hot air escapes and is now more restricted than before.
I do intend over the weekend cutting a hole into the side wall of the unit I have built and fitting a 120mm USB fan to draw the warm air out. I was looking at my graphics card (Nvidia GTA 1080) temperature while running a high intensity VR game and it was up around 75c. That looked very high to me. What temperature should graphics cards run at?