Dell Precision 690 - Manual (Page 117)

7. Grasp the memory riser card 3 at each corner and lift memory riser card 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 from which you are removing memory.
9. Grasp the module and pull up to lift the memory module from the memory riser card.
If a module is difficult to remove, gently ease it back and forth to remove it from the connector.
10. Ensure that memory riser card 3 is above system-board connector DIMM_3 and memory riser card 4 is above system-board connector DIMM_4.
Align the notch on the bottom of each riser card with the crossbar in each system-board connector.
11. Insert the riser cards into the connectors until both riser cards snap into position.
12. Connect the power cables to memory riser cards 3 and 4.
13. Ensure that memory riser card 1 is above system-board connector DIMM_1 and memory riser card 2 is above system-board connector DIMM_2.
Align the notch on the bottom of each riser card with the crossbar in each system-board connector.
1 power connectors (4)
2 memory module connectors (4)
3 securing clips (2)
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.
NOTE: If a memory-riser power cable is not plugged in, the system will not boot.
1 power connectors
2 connector
3 securing clips (2)