Server CPU Heatsink FRU 46D1407 PN 44X1745 69Y1323, Passive Aluminum CPU Cooler Replacement for IBM Lenovo System X3400 M2, X3400 M3, X3500 M2, X3500 M3 Tower Servers

This is the original standard passive CPU heatsink exclusively engineered for IBM Lenovo System X3400 M2, X3400 M3, X3500 M2 and X3500 M3 tower servers, marked with official part numbers FRU 46D1407, PN 44X1745 and spare part code 69Y1323 for direct one-to-one replacement.

The cooling assembly adopts a composite structure with a high-purity copper bottom base and dense layered aluminum cooling fins. Copper directly touches the CPU surface to rapidly absorb concentrated heat, while stacked aluminum fins expand the heat dissipation area and rely on the servers built-in hot-swap fan module for forced air convection, effectively controlling the operating temperature of Intel Xeon 5500 and 5600 series multi-core processors under full business load.

The integrated locking fasteners are consistent with the original factory specification, which can lock tightly on the server motherboard CPU socket bracket, providing balanced downward pressure across the entire processor IHS. It eliminates common risks such as thermal paste extrusion, local overheating, CPU automatic frequency reduction and unexpected server restart caused by loose or uneven installation of generic coolers.

Strictly compatible with the official Calibrated Vectored Cooling thermal management framework of X3400/X3500 M2/M3 chassis, it does not block internal air ducts and maintains the servers original heat dissipation wind path design, guaranteeing long-term reliable running for file storage, database, virtualization and enterprise application servers.

Widely applied in IT equipment repair shops, enterprise server room maintenance, second-hand server refurbishment and CPU hardware upgrade projects. Each unit is inspected for flat base, intact fins and complete fixing hardware before delivery to ensure plug-and-play installation without modification.