Dell EMC PowerEdge R940xa Installation and Service Manual

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System board connectors

System board connectors — Figure 1. System board connectors

Table 1. System board connectorsSystem board connectors and jumpers.
Item	Connector	Description
1	D7, D1, D8, D2, D9, D3	Memory module sockets for CPU 4 DIMMs — Channels 0/1/2
2	J_ODD	Optical drive power connector
3	CPU4	CPU 4 processor and heat sink module socket—with dust cover
4	J_BP_PWR0	Backplane B power connector
5	J_BP_SIG1	Backplane B signal connector (rear)
6	D6, D12, D5, D11, D4, D10	Memory module sockets for CPU 4 DIMMs — Channels 3/4/5
7	C7, C1, C8, C2, C9, C3	Memory module sockets for CPU 3 DIMMs — Channels 0/1/2
8	J_FAN4U_4	Cooling fan 4 connector
9	CPU3	CPU 3 processor and heat sink module socket—with dust cover
10	J_BP2	Backplane A signal connector (front)
11	C6, C12, C5, C11, C4, C10	Memory module sockets for CPU 3 DIMMs — Channels 3/4/5
12	J_BP_PWR1	Backplane A power connector
13	SATA A	PCIe signal M3
14	SATA B	PCIe signal M1
15	SATA C	PCIe signal M2
16	CPU2	CPU 2 processor and heat sink module socket—with dust cover
17	B3, B9, B2, B8, B1, B7	Memory module sockets for CPU 2 DIMMs — Channels 0/1/2
18	B10, B4, B11, B5, B12, B6	Memory module sockets for CPU 2 DIMMs — Channels 3/4/5
19	J_PIB_SIG1	Power Interposer Board signal connector 1
20	J_RISER2	PCIe riser 2 connector
21	J_PIB_PWR 4	Power Interposer Board power connector 4
22	J_PIB_PWR 3	Power Interposer Board power connector 3
23	J_PIB_PWR 2	Power Interposer Board power connector 2
24	J_PIB_PWR 1	Power Interposer Board power connector 1
25	U_USB_RECONN	USB Client power management
26	J_BATT_PWR	NVDIMM battery power connector
27	J_BATT_SIG	NVDIMM battery signal connector
28	J_TPM_MODULE	TPM connector
29	CMOS Battery	CMOS coin cell battery connector
30	J_SLOT7	PCIe x16 connector — slot 7
31	J_SLOT6	PCIe x16 connector — slot 6
32	J_USB_INT	Internal USB connector
33	J_SATA_1	NPIO connector1 for x8 Backplane
34	J_NDC	Network daughter card connector
35	J_RISER1	PCIe riser 1 connector
36	J_SATA_2	NPIO connector 2 for x8 Backplane
37	J_PWRD_EN	Reset BIOS password
38	J_NVRAM_CLR	Clear NVRAM
39	J_FRONT_VIDEO	Front video connector
40	J_SATA_3	SATA C connector—Optical drive SATA connector
41	A3, A9, A2, A8, A1, A7	Memory module sockets for CPU 1 DIMMs — Channels 0/1/2
42	A10, A4, A11, A5, A12, A6	Memory module sockets for CPU 1 DIMMs — Channels 3/4/5
43	CPU1	CPU 1 processor and heat sink module socket—with dust cover
44	SATA D	PCIe signal M5
45	SATA E	PCIe signal M4
46	SATA F	PCIe signal M6