OEM Cooling Fan for the ROG Zephyrus GX551 2021 series laptop, this is the cooling fan for CPU processor and GPU Graphics card. If your PC fan is running very loud or not functioning then a replacement may be needed. The fan uses an integrated flex cable to connect to the motherboard. The cable connects via 4-pin connector making it a plug and play replacement module, NO soldering is required. CPU Compatible Part Number(s): 13NR04N0P02011, FN86 DFSCK22D05883J GPU Compatible Part Number(s): 13NR04N0P03011, FN85 DFSCK221151819 Direct Current: DC 12V / 1.0A Wire Length approx: 2.80 cm/1.20-inches Power Connection: 4-pin 4-Wires, Wire-to-Board NOTE: The Screw NOt included, Please retain the original screw for the installation of this part. Reference list of compatible with models: - ROG Zephyrus GX551 series: GX551Q, GX551QM, GX551QS, GX551QR ..... - ROG Zephyrus GX551QS series: GX551QS-XS98, GX551QS-XS99, GX551QS-R9XR3080, GX551QS-HF012T ... - ROG Zephyrus GX551QR series: GX551QR-XS98, GX551QR-HF006T, GX551QR-XB98 ... - ROG Zephyrus GX551QM series: GX551QM-ES96, GX551QM-ES76, GX551QM-HF003T ... What's in the box: 1x 12v CPU Cooling Fan (Left side) 1x 12v GPU Cooling Fan (Right side) 2x Thermal Greases