This is the CPU Cooling Fan for Dell Latitude 5540 Precision 3580 laptop series with UMA integrated graphics, attaches to your existing heatsink. 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. Compatible D P/N: 2K1XY, 02K1XY Compatible Part Number(s): EG50060S1-C680-S9A, 023.100T5.0001, BAPA0807R5HY007, 023.100T6.0031 Direct Current: DC 5V / 0.38A, Min. 6.5 CFM 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: - Latitude 5540 (E5540) - Precision 3580 (M3580) What's in the box: 1x CPU Cooling Fan 1x Thermal Greases