Just make sure you have plenty of airflow being directed to the gfx card! The air is exhausted into the case and has a chance of building up underneath the card. But then again, the Zalman cooling solutions face the same problem. A side fan isn't necessary, but a fan (80-120mm, doesn't matter, as long as it is quiet and provides decent CFM) boosting the airflow from a front intake should clear up any potential problems, but considering you are somehow cooling a 4Ghz Presler, then I guess you already have a good enough airflow through your case. Just to let you know :wink: because once everything's set up nicely, you should get 10C shaved off the load temps.