Technical Product Specification

Intel® Server Boards S5520HC, S5500HCV, and S5520HCT TPS Functional Architecture
Revision 1.9
Intel order number E39529-013
31
Table 3. Memory Running Frequency vs. Processor SKU
DIMM Type
DDR3 800
DDR3 1066
DDR3 1333
Processor Integrated
Memory Controller
(IMC) Max.
Frequency (Hz)
800
800
800
800
Memory Running Frequency
(Hz) = Fastest Common
Frequency of Processor
IMC and Memory
1066
800
1066
1066
1333
800
1066
1333
Table 4. Memory Running Frequency vs. Memory Population
DIMM Type
DIMM
Populated
Per Channel
Memory Running Frequency
(Y/N)
Command/Address
Rate
Ranks Per DIMM
SR: Single-Rank
DR: Dual-Rank
QR: Quad-Rank
Description
800MHz
1066MHz
1333MHz
RDIMM
1
Y
Y
Y
1N
SR or DR
All RDIMMs run at the fastest
common frequency of
processor IMCs and installed
memory: 800MHz, 1066MHz,
or 133MHz
RDIMM
1
Y
Y
N
1N
QR only
All RDIMMs run at 800MHz or
1066MHz when Quad-Rank
RDIMM is installed in any
channel.
RDIMM
2
Y
Y
N
1N
SR or DR
All RDIMMs run at 800MHz or
1066MHz when two RDIMMs
(Single-Rank or Dual-Rank)
are installed in the same
channel.
RDIMM
2
Y
N
N
1N
QR only
All RDIMMs run at 800MHz
when two RDIMMs (either or
both are Quad-Rank RDIMMs)
are installed in the same
channel.
UDIMM
w/ or w/o
ECC
1
Y
Y
Y
1N
SR or DR
All UDIMMs run at the fastest
common frequency of
processor IMCs and installed
memory: 800MHz, 1066MHz,
or 1333MHz.
UDIMM
w/ or w/o
ECC
2
Y
Y
N
2N
SR or DR
All UDIMMs run at 800MHz or
1066MHz when two UDIMMs
(Single- or Dual-Rank) are
installed in the same channel.
1N: One clock cycle for the DRAM commands arrive at the DIMMs to execute.
2N: Two clock cycles for the DRAM commands arrive at the DIMMs to execute.