Airflow upgrade for DELL Optiplex 7020 SFF

Dell Optiplex SFF Airflow upgrade..

Upgraded the CPU from 54W Pentium to a 84W Core i5.
Thought it makes sense to upgrade cooling/airflow additionally.
Here is what I did.

RESULT:
- idle CPU temp around 32C
- full load CPU temp with closed chassis around 82C (prime95 stress test max power/heat option)
- full load CPU (as above) with open chassis around 72C
note: ambient around 23C