Example memory module SPD data |

Detailed Memory module SPD data is available in a level 2 activity trace log file. This includes information such as the memory module timings. An example extract from a level 2 activity trace file is shown below: Memory Total Physical Memory: 2047MB Available Physical Memory: 623MB Memory devices: Slot 1: - 1GB DDR2 SDRAM PC2-6400 - Corsair CM2X1024-6400 - SSTL 1.8V, Clk: 400.0MHz, Timings 5-5-5-18 (@ Max. freq.) Slot 2: - Not populated Slot 3: - 1GB DDR2 SDRAM PC2-6400 - Corsair CM2X1024-6400 - SSTL 1.8V, Clk: 400.0MHz, Timings 5-5-5-18 (@ Max. freq.) Slot 4: - Not populated Memory SPD: DIMM#0 Memory type: DDR2 SDRAM SPD revision: 1.2 Manufacturer: Corsair Manufacturing date: Year: 0, Week: 0 Serial number: 00000000 Part number: CM2X1024-6400 Clock speed: 400.0 MHz Memory size: 1024 MB Number of banks: 8 Row address bits: 14 Column address bits: 10 Bus width: 64 bits Device width: 8 bits Number of ranks: 1 ECC: No Module voltage: SSTL 1.8V Minimum clock cycle time (tCK): 2.500 ns Supported CAS latencies: 4 5 Minimum CAS latency time (tAA): 12.500 ns Minimum RAS to CAS delay time (tRCD): 12.500 ns Minimum row precharge time (tRP): 12.500 ns Minimum active to precharge time (tRAS): 45.000 ns Supported timing at highest clock speed: 5-5-5-18 Minimum Row Active to Row Active Delay (tRRD): 7.500 ns Minimum Active to Auto-Refresh Delay (tRC): 55.000 ns Minimum Recovery Delay (tRFC): 105.000 ns Data access time from clock (tAC): 0.400 ns Minimum Write Recovery time (tWR): 15.000 ns Minimum Write to Read CMD Delay (tWTR): 7.500 ns Minimum Read to Pre-charge CMD Delay (tRTP): 7.500 ns Address/Command Setup Time Before Clock (tIS): 0.180 ns Address/Command Hold Time After Clock (tIH): 0.250 ns Data Input Setup Time Before Strobe (tDS): 0.050 ns Data Input Hold Time After Strobe (tDH): 0.130 ns Maximum DQS to DQ Skew (tDQSQ): 0.200 ns Maximum Read Data Hold Skew (tQHS): 0.240 ns Supported Burst Lengths: 4 8 Refresh Rate: Reduced (7.8us) Supports Partial Array Self-Refresh: No Module Height: 30.0 mm DIMM#2 Memory type: DDR2 SDRAM SPD revision: 1.2 Manufacturer: Corsair Manufacturing date: Year: 0, Week: 0 Serial number: 00000000 Part number: CM2X1024-6400 Clock speed: 400.0 MHz Memory size: 1024 MB Number of banks: 8 Row address bits: 14 Column address bits: 10 Bus width: 64 bits Device width: 8 bits Number of ranks: 1 ECC: No Module voltage: SSTL 1.8V Minimum clock cycle time (tCK): 2.500 ns Supported CAS latencies: 4 5 Minimum CAS latency time (tAA): 12.500 ns Minimum RAS to CAS delay time (tRCD): 12.500 ns Minimum row precharge time (tRP): 12.500 ns Minimum active to precharge time (tRAS): 45.000 ns Supported timing at highest clock speed: 5-5-5-18 Minimum Row Active to Row Active Delay (tRRD): 7.500 ns Minimum Active to Auto-Refresh Delay (tRC): 55.000 ns Minimum Recovery Delay (tRFC): 105.000 ns Data access time from clock (tAC): 0.400 ns Minimum Write Recovery time (tWR): 15.000 ns Minimum Write to Read CMD Delay (tWTR): 7.500 ns Minimum Read to Pre-charge CMD Delay (tRTP): 7.500 ns Address/Command Setup Time Before Clock (tIS): 0.180 ns Address/Command Hold Time After Clock (tIH): 0.250 ns Data Input Setup Time Before Strobe (tDS): 0.050 ns Data Input Hold Time After Strobe (tDH): 0.130 ns Maximum DQS to DQ Skew (tDQSQ): 0.200 ns Maximum Read Data Hold Skew (tQHS): 0.240 ns Supported Burst Lengths: 4 8 Refresh Rate: Reduced (7.8us) Supports Partial Array Self-Refresh: No Module Height: 30.0 mm