Dell EMC PowerEdge R940 Installation And Service Manual page 157

Figure 100. Processor expansion module (PEM) connectors
Table 45. Processor expansion module (PEM) connectors
Item Connector
1 D7, D1, D8, D2, D9, D3
2 D6, D12, D5, D11, D4, D10
3 C7, C1, C8, C2, C9, C3
4 C6, C12, C5, C11, C4, C10
5 CPU3
6 IO_RISER2
7 J_IORL_PWR
8 RM_UPI_C
9 RM_UPI_B
10 J_PEM_CLK
Description
Memory module sockets
Memory module sockets
Memory module sockets
Memory module sockets
CPU3 processor heat sink module socket
Riser 2 connector
Left expansion card riser power connector
UPI cable connector "C"
UPI cable connector "B"
PEM clock connector
Jumpers and connectors 157