I've acquired a Gigabyte AMD Radeon HD 7750 GPU (GV-R775OC-1GI) To get it to fit in the old Dell I have, I had to remove the head-sink shroud. Then I just attached the fan directly to the head-sink I assume it will have some effect on airflow, but thus far not noticed it. Though I've only played a bit of MOH to test it was working. Something to monitor or no biggie? I've a bar heater of a Q6700 in the box but the case has a big fan and it all seems cool.