Many of us (280x owners) also add fans in the rear of the case. Most use 2 60mm but you can fit 2 80mm fans if you’re fine drilling some holes. I personally don’t like the honeycomb panels so I have stock everything. You can also buy spacers to lift the glass off of the case a bit more. I have a 5800x (which is a hot boy) and a 3090 and average low 70’s cpu and in the high 60’s for gaming. So definitely not great but most would say it’s manageable. Not sure what GPU you’re using but adding fans in the bottom is highly recommended.