Corsair MM300 Extended Anti-Fray Mouse Pad | Edifier C2 2.1ch Sound System | XBOX One S Controller | XBOX 360 Wireless Controller for Windows | APC SUA1000i Smart-UPS | PS4 Slim 500GB [Region 1 - USA]
I'd go for a neutral airflow. I have two 90mm Vantec fans, one in the front bottom and one in the top rear below the power supply in my case. One brings cool air in and the other takes it right out. Best setup ever! If you don't know what the airflow ratings are for your two fans, I'd go with a negative airflow in your case. Take the two fans and run them together and see (or feel ) which one has more suction/airflow. Then, take that fan and place it in the back.
But make sure that if it's your 120mm fan, it can fit in the back.
My Computer
At a glance
Windows 7 Ultimate x64AMD Athlon 240 II @ 2.8-4.004 ghzSuperTalent 4gb DDR3ATI Radeon 3000HD
