SPD EEPROM

http://en.wikipedia.org/wiki/Serial_Presence_Detect
http://www.simmtester.com/page/news/showpubnews.asp?num=101

$ sudo /usr/bin/decode-dimms

# decode-dimms version 5164 (2008-03-26 14:48:21 +0100)

Memory Serial Presence Detect Decoder
By Philip Edelbrock, Christian Zuckschwerdt, Burkart Lingner,
Jean Delvare, Trent Piepho and others


Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/0-0050
Guessing DIMM is in bank 1

---=== SPD EEPROM Information ===---
EEPROM Checksum of bytes 0-62 OK (0xC1)
# of bytes written to SDRAM EEPROM 128
Total number of bytes in EEPROM 256
Fundamental Memory type DDR SDRAM
SPD Revision 0.0

---=== Memory Characteristics ===---
Maximum module speed 400MHz (PC3200)
Size 512 MB
tCL-tRCD-tRP-tRAS 2.5-3-3-8
Supported CAS Latencies 2.5T
Supported CS Latencies 0
Supported WE Latencies 1
Minimum Cycle Time at CAS 2.5 5 ns
Maximum Access Time at CAS 2.5 0.6 ns

---=== Manufacturing Information ===---
Manufacturer Undefined
Part Number M2S9JA8APS9F081KA-
Manufacturing Date 2007-W40
Assembly Serial Number 0x5295048B


Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/0-0051
Guessing DIMM is in bank 2

---=== SPD EEPROM Information ===---
EEPROM Checksum of bytes 0-62 OK (0xC1)
# of bytes written to SDRAM EEPROM 128
Total number of bytes in EEPROM 256
Fundamental Memory type DDR SDRAM
SPD Revision 0.0

---=== Memory Characteristics ===---
Maximum module speed 400MHz (PC3200)
Size 512 MB
tCL-tRCD-tRP-tRAS 2.5-3-3-8
Supported CAS Latencies 2.5T
Supported CS Latencies 0
Supported WE Latencies 1
Minimum Cycle Time at CAS 2.5 5 ns
Maximum Access Time at CAS 2.5 0.6 ns

---=== Manufacturing Information ===---
Manufacturer Undefined
Part Number M2S9JA8APS9F081KA-
Manufacturing Date 2007-W40
Assembly Serial Number 0x2A93048F


Number of SDRAM DIMMs detected and decoded: 2