Dell Precision T7400 (Late 2007) - Manual (Page 189)

Adding and Replacing Parts 189
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 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.
1 power connectors (4) 2 memory module connectors (4)
3 securing clips (2)
3
2
1