Cisco Intel X540 2-Port 10GBase-T UCSC-PCIE-ITG= User Manual

When considering the memory configuration of your server, you should take into account the following: 

■

Each channel has three DIMM slots (for example, channel A = slots A1, A2, and A3).

— A channel can operate with one, two, or three DIMMs installed.

— If a channel has only one DIMM, populate slot 1 first (the blue slot).

■

When both CPUs are installed, populate the DIMM slots of each CPU identically.

— Fill bank 1 blue slots in the channels first: A1, E1, B1, F1, C1, G1, D1, H1

— Fill bank 2 black slots in the channels second: A2, E2, B2, F2, C2, G2, D2, H2

— Fill bank 3 black slots in the channels third: A3, E3, B3, F3, C3, G3, D3, H3

■

Any DIMM installed in a DIMM socket for which the CPU is absent is not recognized.

■

Observe the DIMM rules shown in 

1. Although you can have different DIMM capacities in the same bank, this will result in less than optimal 

performance. For optimal performance, all DIMMs in the same bank should be identical.

DIMM Capacity
RDIMM = 4, 8, or 16 GB
 

 

 

LRDIMM = 32 GB
 

UDIMM = 4 GB

DIMMs in the same channel (for 

example, A1, A2, A3) can have 

different capacities.
 

You cannot mix 32 GB LRDIMMs with any 

RDIMM or UDIMM
You cannot mix 4 GB UDIMMs with any 

RDIMM or LRIMM

For best performance, DIMMs in the 

same bank (for example, A1, B1, C1, 

D1) should have the same capacity.
 

You cannot mix 32 GB LRDIMMs with 

any RDIMM or UDIMM
You cannot mix 4 GB UDIMMs with 

any RDIMM or LRIMM

DIMM Speed 
1866-, 1600-, or 1333-MHz

2

2. Only 1866-, 1600-, and 1333-MHz DIMMs are currently available for the C240 M3 server.

DIMMs will run at the lowest speed of 

the DIMMs/CPUs installed

DIMMs will run at the lowest speed of 

the DIMMs/CPUs installed

DIMM Type
RDIMMs, LRDIMMs, or 

UDIMMs

You cannot mix DIMM types in a channel You cannot mix DIMM types in a bank

See 

 

valid LRDIMM and RDIMM 1 DPC and 2 

DPC memory configurations
UDIMMs run at 1066 MHz at 1.35 V and 

1333 MHz at 1.5 V

See 

 for 

 

valid LRDIMM and RDIMM 3 DPC 

configurations
3 DPC is not supported for UDIMMs