Fujitsu PRIMERGY RX2540 M4 Upgrade And Maintenance Manual page 367

Adhesive memory pads
Figure 244: Adhesive memory pads
Figure 245: Assembly rules for the adhesive memory pads
All sides of the memory modules that point to a cooling fin (see arrows) of a
memory cooling unit (1) must be covered with an adhesive memory pad, see
figure above.
I
For Japan:
Product and spare part are shipped attached with the adhesive memory
pads on both sides of the memory module. Regardless of the memory
position, use the memory modules as they are (with two adhesive
memory pads) when installing or replacing a memory module.
RX2540 M4
Upgrade and Maintenance Manual
Liquid cooling (LC)
367