I always remove (cut out) my exhaust fan grill for unrestricted airflow. Your exhaust grill seems very dense and restrictive. Otherwise a higher pressure exhaust fan could help too. Perhaps even repasting the cpu?
I use an SD card reader, since my case doesn't have front 5.25" or 3.5" bays.
Delock PCI Express Card > 1 x external SDXC Slot (91743)
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