Dell Precision 690 - Manual (Page 113)

4. Disconnect the power cable from memory riser card 1 and 2.
5. Grasp the memory riser card 1 at each corner and lift memory riser card 1 and attached card 2 from the DIMM_1 and DIMM_2 slots on the system board.
If a card is difficult to remove, gently ease it back and forth to remove it from the connector.
6. Disconnect the power cables from memory riser cards 3 and 4.
7. Grasp the memory riser card 3 at each corner and lift memory riser cards 3 and attached card 4 from the DIMM_3 and DIMM_4 memory module
connectors on the system board.
If a card is difficult to remove, gently ease it back and forth to remove it from the connector.
8. Press out the securing clip at each end of the module connector on the memory riser card into which you are installing memory.
9. Align the notch on the bottom of the module with the crossbar in the connector.
10. Insert the module into the connector until the module snaps into position.
1 power connectors (4)
2 memory connectors (4)
3 securing clips (2)
1 memory riser cards 1 and 2
2 memory riser cards 3 and 4
CAUTION: Fully-buffered memory modules may become very hot during normal operation. Ensure that memory modules have had sufficient time
to cool before you touch them.
NOTICE: Full-length heat spreaders (FLHS) are required for any memory in a memory riser and for 667 MHz DIMMs.
NOTE: Align the memory module carefully to ensure that it is facing the correct direction; FBDs on memory riser cards 1 and 2 face a different direction
than those on riser cards 3 and 4.
1 cutouts (2)
2 memory module
3 notch
4 crossbar
NOTICE: To avoid damage to the memory module, press the module straight down into the connector while you apply equal force to each end of the
module.