Intel BB5520UR Product Specification - Page 45

Intel® Server Boards S5520HC, S5500HCV, and S5520HCT TPS Functional Architecture Table 3. Memory Running Frequency vs. Processor SKU DDR3 800 DIMM Type DDR3 1066 DDR3 1333 Processor Integrated Memory Controller (IMC) Max. Frequency (Hz) 800 1066 1333 800 800 800 Memory Running Frequency (Hz) = Fastest Common 800 1066 1066 Frequency of Processor IMC and Memory 800 1066 1333 DIMM Type Table 4. Memory Running Frequency vs. Memory Population DIMM Populated Per Channel Memory Running Frequency (Y/N) 800MHz 1066MHz 1333MHz Command/ Address Rate Ranks Per DIMM SR: Single-Rank DR: Dual-Rank QR: Quad-Rank RDIMM 1 Y Y Y 1N SR or DR RDIMM 1 Y YN 1N QR only RDIMM 2 Y Y N 1N SR or DR RDIMM 2 Y N N 1N QR only UDIMM w/ or w/o 1 ECC Y Y Y 1N SR or DR UDIMM w/ or w/o 2 ECC Y Y N 2N SR or DR 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. Description All RDIMMs run at the fastest common frequency of processo IMCs and installed memory: 800MHz, 1066MHz, or 133MHz All RDIMMs run at 800MHz or 1066MHz when Quad-Rank RDIMM is installed in any channel. All RDIMMs run at 800MHz or 1066MHz when two RDIMMs (Single-Rank or Dual-Rank) are installed in the same channel. All RDIMMs run at 800MHz whe two RDIMMs (either or both are Quad-Rank RDIMMs) are installed in the same channel. All UDIMMs run at the fastest common frequency of processo IMCs and installed memory: 800MHz, 1066MHz, or 1333MHz. All UDIMMs run at 800MHz or 1066MHz when two UDIMMs (Single- or Dual-Rank) are installed in the same channel. Revision 1.8 31 Intel order number E39529-013