Lenovo ThinkEdge SE455 V3 User Manual page 76

b. Remove all the PCIe assemblies. If the configuration comes with PCIe riser 2 and internal
drives, remove all the internal drives, and lift the internal drive backplane before removing PCIe
riser 2. See
Note: For the configurations with GPU power cable, disengage all the GPU power cables from
the processor air baffle before removing PCIe riser assembly.
Step 2. Grasp the air baffle and carefully lift it out of the chassis.
Attention: For proper cooling and airflow, reinstall the air baffle before turning on the server.
Operating the server with the air baffle removed might damage server components.
Figure 43. Removing the air baffle for 1U heat sink
68 ThinkEdge SE455 V3 User Guide
"Remove the PCIe riser assembly" on page 141.