I recently swapped my pc case from the DeepCool Mattrex 50 to the Corsair 4000D airflow as I was having cooling issues with the Deepcool. The Corsair case is much better but since swapping I seem to be having issues with my rear USB ports. My keyboard and mouse are lagging out and weird stuttering issues in games. It's like I am lagging but I am not. If I move it to the front USB port it is better but still not 100%. On the old case I had a USB header cable but there is only the USB C cable with the Corsair. My motherboard doesn't have this port. Is my case missing a USB header cable or do I need an adapter to use the rear USB ports properly? Or is there something else going on? Sorry if it is a daft question
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