Rear FanConnector2. Lift the rear fan air baffle up and rotate it back out of the way.3. Disconnect the fan power cable from the system board.4. Grasp the fan cage by the top edges.5. Pull the retention pin out and slide the fan cage toward the PCI expansion slots;then, pull the cage toward the front of the server and lift it out.To install the rear fan cage, complete the following:1. Rotate the air baffle out of the way.2. Align the clips on the back of the fan cage with the mounting holes in the rear ofthe chassis.3. Insert the clips through the holes and push the fan cage toward thepower-supply cage until it stops. The retention pin clicks into place when the fancage is in place.4. Connect the rear fan power cable to the connector on the system board.5. Rotate the air baffle into the closed position.Memory moduleThe following notes describe the types of dual inline memory modules (DIMMs) thatthe server supports and other information that you must consider when you installDIMMs:v The server supports 667 MHz, 1.8 V, 240-pin, PC2-5300 double-data-rate (DDR)II, fully buffered synchronous dynamic random-access memory (SDRAM) witherror correcting code (ECC) DIMMs. These DIMMs must be compatible with thelatest 5300 SDRAM Fully Buffered DIMM (FBD) specification. For a list ofsupported optional devices for the server, see http://www.ibm.com/servers/eserver/serverproven/compat/us/.66 IBM System x3500 Type 7977: Problem Determination and Service Guide