80mm 12V Brushless DC Cooling Fan 80x80x20mm Low Speed Sleeve Bearing Dynatron (Top Motor) DF128020SL or DF1208SL 80x80x20 mm 80-mm ( 8-cm ) System Fan FN-8020-xxx-SL-DY 1.      2.      3.      4. 5.      6.      7.      8. Power Connector Options: 1. DF128020SL (DF1208SL 20mm) + 3-pin & 4-pin Combo to Power Supply or Mother Board 2. DF128020SL (DF1208SL 20mm) + 4-pin to Power Supply Connection 3. DF128020SL (DF1208SL 20mm) + 3-pin to Mother Board Connection 4. DF128020SL (DF1208SL 20mm) + 3-pin 2.54mm-pitch SL Crimp Housing 5. DF128020SL (DF1208SL 20mm) + 3-conductor bare wires 6. DF128020SL (DF1208SL 20mm) + 2-conductor bare wires 7. DF128020SL (DF1208SL 20mm) + 2-pin #3.96 Plug 8. DF128020SL (DF1208SL 20mm) + 4-pin to Power Supply & 3-pin Data Wire ( subject to inventory ) Size: 80x80x20mm Bearing System: Sleeve Bearing Rated Voltage: 12V Speed: 2200 +/- 10% RPM Air Flow: 21.50 CFM Noise Level: 23.00 dBA click here for Dynatron / Top-Motor Item Numbers Comparison Chart