This is the Cooling Fan for Yoga C740-15 laptop series, 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, attaches to your existing heatsink. Compatible Part Number(s): DFS1507053H0T FLMU Compatible FRU: 5H40S19962 Direct Current: DC 5V / 0.5A, 2.25W Power Connection: 4-Pins 4-Wires, Plug-in Reference list of compatible with models: - Yoga C740-15IML (Type: 81TD) series: 81TD0003US, 81TD0005US, 81TD0007US, 81TD001YUS, 81TD0006US, 81TD0008US, 81TD0020US, 81TD0063US, 81TD0078US, 81TD0077US, 81TDCT01WW and more... What's in the box: 1x CPU & GPU Cooling Fan 2x Thermal Greases