Memory Serial Presence Detect Decoder

By Philip Edelbrock, Christian Zuckschwerdt, Burkart Lingner,
Jean Delvare, Trent Piepho and others

Decoding EEPROM4-00514-0053
Guessing DIMM is inbank 2bank 4
SPD EEPROM Information
EEPROM CRC of bytes 0-125OK (0x328C)
# of bytes written to SDRAM EEPROM384
Total number of bytes in EEPROM512
Fundamental Memory typeDDR4 SDRAM
SPD Revision1.0
Module TypeUDIMM
EEPROM CRC of bytes 128-253OK (0x27DE)
Memory Characteristics
Maximum module speed2400 MHz (PC4-19200)
Size8192 MB
Banks x Rows x Columns x Bits16 x 15 x 10 x 64
SDRAM Device Width8 bits
Ranks2
Rank MixSymmetrical
AA-RCD-RP-RAS (cycles)16-16-16-39
Supported CAS Latencies25T, 20T, 19T, 18T, 17T, 16T, 15T, 14T, 13T, 12T, 11T, 10T, 9T
Timings at Standard Speeds
AA-RCD-RP-RAS (cycles) as DDR4-240016-16-16-39
AA-RCD-RP-RAS (cycles) as DDR4-213315-15-15-35
AA-RCD-RP-RAS (cycles) as DDR4-186613-13-13-31
AA-RCD-RP-RAS (cycles) as DDR4-160011-11-11-26
Timing Parameters
Minimum Cycle Time (tCKmin)0.833 ns
Maximum Cycle Time (tCKmax)1.500 ns
Minimum CAS Latency Time (tAA)13.328 ns
Minimum RAS to CAS Delay (tRCD)13.328 ns
Minimum Row Precharge Delay (tRP)13.328 ns
Minimum Active to Precharge Delay (tRAS)32.375 ns
Minimum Active to Auto-Refresh Delay (tRC)45.703 ns
Minimum Recovery Delay (tRFC1)260.000 ns
Minimum Recovery Delay (tRFC2)160.000 ns
Minimum Recovery Delay (tRFC4)110.000 ns
Minimum Four Activate Window Delay (tFAW)21.000 ns
Minimum Row Active to Row Active Delay (tRRD_S)4.165 ns
Minimum Row Active to Row Active Delay (tRRD_L)5.831 ns
Minimum CAS to CAS Delay (tCCD_L)5.356 ns
Other Information
Package TypeMonolithic
Maximum Activate CountUnlimited
Post Package RepairNot supported
Module Nominal Voltage1.2 V
Thermal SensorNo
Physical Characteristics
Module Height32 mm
Module Thickness2 mm front, 2 mm back
Module Reference CardB revision 0
Manufacturer Data
Module ManufacturerCorsair
DRAM ManufacturerMicron Technology
Part NumberCMK16GX4M2A2400C16



Number of SDRAM DIMMs detected and decoded: 2