Dell Precision T7400 (Late 2007) - Manual (Page 183)

Adding and Replacing Parts 183
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.
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.
8 Press out the securing clip at each end of the module connector on the
memory riser card into which you are installing memory.
NOTICE: Full-length heat spreaders (FLHS) are required for any memory in a
memory riser and for 667 MHz DIMMs.
1 memory riser cards 1 and 2 2 memory riser cards 3 and 4
2
1