[SOLVED] - Detecting type of memory installed?

[phil_r]

Does anyone know of a utility that can scan and report on the type of memory installed (DDR, SDRAM, memory speed etc)? I've got a couple of machines I want to upgrade and trying to avoid the hassle of opening them up first

[alex.blackbit]

i believe the windows software cpuz has such capabilities, but i don't know any linux app or library for that.
but when you know the chipset of the mainboard (lspci) you can at least "guess" the type of memory.

[eccerr0r]

You could install lm-sensors and use the eeprom module through i2c/smbus to read your DIMM data with decode-dimms.pl . It's not always accurate and depends on your motherboard hooked up properly but it's a start.

[energyman76b]

you also need the right smbus module loaded for decode-dimms. But if everything is loaded, it works surprisingly well.

[potatoface]

try

Code: Select all

sys-apps/lshw

it lists some information on your hardware...
when you emerge it with USE="gtk" you get a nice gui

regards,
potatoface

[timeBandit]

try [sys-apps/lshw]
it lists some information on your hardware...
when you emerge it with USE="gtk" you get a nice gui

++
The reported memory info is fairly complete, for example:

Code: Select all

id:             bank:2
description:    RIMM RDRAM RAMBUS 400 MHz (2.5 ns)
physical id:    2
slot:           RIMM3
size:           512MB
width:          16 bits
clock:          400MHz (2.5ns)

[energyman76b]

that is cute.

Now compare with decode-dimms:
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 (0x37)
# of bytes written to SDRAM EEPROM 128
Total number of bytes in EEPROM 256
Fundamental Memory type DDR2 SDRAM
SPD Revision 1.2
Memory Characteristics
Maximum module speed 800MHz (PC2-6400)
Size 1024 MB
Banks x Rows x Columns x Bits 4 x 14 x 10 x 64
Ranks 2
SDRAM Device Width 8 bits
Module Height 30.0 mm
Module Type UDIMM (133.25 mm)
DRAM Package Planar
Voltage Interface Level SSTL 1.8V
Refresh Rate Reduced (7.8 us) - Self Refresh
Supported Burst Lengths 4, 8
tCL-tRCD-tRP-tRAS 6-5-5-18
Supported CAS Latencies (tCL) 6T, 5T, 4T
Minimum Cycle Time at CAS 6 (tCK min) 2.50 ns
Maximum Access Time at CAS 6 (tAC) 0.40 ns
Minimum Cycle Time at CAS 5 2.50 ns
Maximum Access Time at CAS 5 0.40 ns
Minimum Cycle Time at CAS 4 3.75 ns
Maximum Access Time at CAS 4 0.50 ns
Maximum Cycle Time (tCK max) 8.00 ns
Timing Parameters
Address/Command Setup Time Before Clock (tIS) 0.17 ns
Address/Command Hold Time After Clock (tIH) 0.25 ns
Data Input Setup Time Before Strobe (tDS) 0.05 ns
Data Input Hold Time After Strobe (tDH) 0.12 ns
Minimum Row Precharge Delay (tRP) 12.50 ns
Minimum Row Active to Row Active Delay (tRRD) 7.50 ns
Minimum RAS# to CAS# Delay (tRCD) 12.50 ns
Minimum RAS# Pulse Width (tRAS) 45.00 ns
Write Recovery Time (tWR) 15.00 ns
Minimum Write to Read CMD Delay (tWTR) 7.50 ns
Minimum Read to Pre-charge CMD Delay (tRTP) 7.50 ns
Minimum Active to Auto-refresh Delay (tRC) 57.50 ns
Minimum Recovery Delay (tRFC) 105.00 ns
Maximum DQS to DQ Skew (tDQSQ) 0.20 ns
Maximum Read Data Hold Skew (tQHS) 0.30 ns
Manufacturing Information
Manufacturer AENEON
Manufacturing Location Code E
Part Number AET760UD00-25DB97X
Revision Code 0x0100

Manufacturing Date 2007-W20

Assembly Serial Number 0x01023620



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 (0x37)
# of bytes written to SDRAM EEPROM 128
Total number of bytes in EEPROM 256
Fundamental Memory type DDR2 SDRAM
SPD Revision 1.2
Memory Characteristics
Maximum module speed 800MHz (PC2-6400)
Size 1024 MB
Banks x Rows x Columns x Bits 4 x 14 x 10 x 64
Ranks 2
SDRAM Device Width 8 bits
Module Height 30.0 mm
Module Type UDIMM (133.25 mm)
DRAM Package Planar
Voltage Interface Level SSTL 1.8V
Refresh Rate Reduced (7.8 us) - Self Refresh
Supported Burst Lengths 4, 8
tCL-tRCD-tRP-tRAS 6-5-5-18
Supported CAS Latencies (tCL) 6T, 5T, 4T
Minimum Cycle Time at CAS 6 (tCK min) 2.50 ns
Maximum Access Time at CAS 6 (tAC) 0.40 ns
Minimum Cycle Time at CAS 5 2.50 ns
Maximum Access Time at CAS 5 0.40 ns
Minimum Cycle Time at CAS 4 3.75 ns
Maximum Access Time at CAS 4 0.50 ns
Maximum Cycle Time (tCK max) 8.00 ns
Timing Parameters
Address/Command Setup Time Before Clock (tIS) 0.17 ns
Address/Command Hold Time After Clock (tIH) 0.25 ns
Data Input Setup Time Before Strobe (tDS) 0.05 ns
Data Input Hold Time After Strobe (tDH) 0.12 ns
Minimum Row Precharge Delay (tRP) 12.50 ns
Minimum Row Active to Row Active Delay (tRRD) 7.50 ns
Minimum RAS# to CAS# Delay (tRCD) 12.50 ns
Minimum RAS# Pulse Width (tRAS) 45.00 ns
Write Recovery Time (tWR) 15.00 ns
Minimum Write to Read CMD Delay (tWTR) 7.50 ns
Minimum Read to Pre-charge CMD Delay (tRTP) 7.50 ns
Minimum Active to Auto-refresh Delay (tRC) 57.50 ns
Minimum Recovery Delay (tRFC) 105.00 ns
Maximum DQS to DQ Skew (tDQSQ) 0.20 ns
Maximum Read Data Hold Skew (tQHS) 0.30 ns
Manufacturing Information
Manufacturer AENEON
Manufacturing Location Code E
Part Number AET760UD00-25DB97X
Revision Code 0x0100

Manufacturing Date 2007-W20

Assembly Serial Number 0x030232F8



Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/0-0052
Guessing DIMM is in bank 3
SPD EEPROM Information
EEPROM Checksum of bytes 0-62 OK (0x37)
# of bytes written to SDRAM EEPROM 128
Total number of bytes in EEPROM 256
Fundamental Memory type DDR2 SDRAM
SPD Revision 1.2
Memory Characteristics
Maximum module speed 800MHz (PC2-6400)
Size 1024 MB
Banks x Rows x Columns x Bits 4 x 14 x 10 x 64
Ranks 2
SDRAM Device Width 8 bits
Module Height 30.0 mm
Module Type UDIMM (133.25 mm)
DRAM Package Planar
Voltage Interface Level SSTL 1.8V
Refresh Rate Reduced (7.8 us) - Self Refresh
Supported Burst Lengths 4, 8
tCL-tRCD-tRP-tRAS 6-5-5-18
Supported CAS Latencies (tCL) 6T, 5T, 4T
Minimum Cycle Time at CAS 6 (tCK min) 2.50 ns
Maximum Access Time at CAS 6 (tAC) 0.40 ns
Minimum Cycle Time at CAS 5 2.50 ns
Maximum Access Time at CAS 5 0.40 ns
Minimum Cycle Time at CAS 4 3.75 ns
Maximum Access Time at CAS 4 0.50 ns
Maximum Cycle Time (tCK max) 8.00 ns
Timing Parameters
Address/Command Setup Time Before Clock (tIS) 0.17 ns
Address/Command Hold Time After Clock (tIH) 0.25 ns
Data Input Setup Time Before Strobe (tDS) 0.05 ns
Data Input Hold Time After Strobe (tDH) 0.12 ns
Minimum Row Precharge Delay (tRP) 12.50 ns
Minimum Row Active to Row Active Delay (tRRD) 7.50 ns
Minimum RAS# to CAS# Delay (tRCD) 12.50 ns
Minimum RAS# Pulse Width (tRAS) 45.00 ns
Write Recovery Time (tWR) 15.00 ns
Minimum Write to Read CMD Delay (tWTR) 7.50 ns
Minimum Read to Pre-charge CMD Delay (tRTP) 7.50 ns
Minimum Active to Auto-refresh Delay (tRC) 57.50 ns
Minimum Recovery Delay (tRFC) 105.00 ns
Maximum DQS to DQ Skew (tDQSQ) 0.20 ns
Maximum Read Data Hold Skew (tQHS) 0.30 ns
Manufacturing Information
Manufacturer AENEON
Manufacturing Location Code E
Part Number AET760UD00-25DB97X
Revision Code 0x0100

Manufacturing Date 2007-W26

Assembly Serial Number 0x050A127B



Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/0-0053
Guessing DIMM is in bank 4
SPD EEPROM Information
EEPROM Checksum of bytes 0-62 OK (0x37)
# of bytes written to SDRAM EEPROM 128
Total number of bytes in EEPROM 256
Fundamental Memory type DDR2 SDRAM
SPD Revision 1.2
Memory Characteristics
Maximum module speed 800MHz (PC2-6400)
Size 1024 MB
Banks x Rows x Columns x Bits 4 x 14 x 10 x 64
Ranks 2
SDRAM Device Width 8 bits
Module Height 30.0 mm
Module Type UDIMM (133.25 mm)
DRAM Package Planar
Voltage Interface Level SSTL 1.8V
Refresh Rate Reduced (7.8 us) - Self Refresh
Supported Burst Lengths 4, 8
tCL-tRCD-tRP-tRAS 6-5-5-18
Supported CAS Latencies (tCL) 6T, 5T, 4T
Minimum Cycle Time at CAS 6 (tCK min) 2.50 ns
Maximum Access Time at CAS 6 (tAC) 0.40 ns
Minimum Cycle Time at CAS 5 2.50 ns
Maximum Access Time at CAS 5 0.40 ns
Minimum Cycle Time at CAS 4 3.75 ns
Maximum Access Time at CAS 4 0.50 ns
Maximum Cycle Time (tCK max) 8.00 ns
Timing Parameters
Address/Command Setup Time Before Clock (tIS) 0.17 ns
Address/Command Hold Time After Clock (tIH) 0.25 ns
Data Input Setup Time Before Strobe (tDS) 0.05 ns
Data Input Hold Time After Strobe (tDH) 0.12 ns
Minimum Row Precharge Delay (tRP) 12.50 ns
Minimum Row Active to Row Active Delay (tRRD) 7.50 ns
Minimum RAS# to CAS# Delay (tRCD) 12.50 ns
Minimum RAS# Pulse Width (tRAS) 45.00 ns
Write Recovery Time (tWR) 15.00 ns
Minimum Write to Read CMD Delay (tWTR) 7.50 ns
Minimum Read to Pre-charge CMD Delay (tRTP) 7.50 ns
Minimum Active to Auto-refresh Delay (tRC) 57.50 ns
Minimum Recovery Delay (tRFC) 105.00 ns
Maximum DQS to DQ Skew (tDQSQ) 0.20 ns
Maximum Read Data Hold Skew (tQHS) 0.30 ns
Manufacturing Information
Manufacturer AENEON
Manufacturing Location Code E
Part Number AET760UD00-25DB97X
Revision Code 0x0100

Manufacturing Date 2007-W24

Assembly Serial Number 0x02051FC0



Number of SDRAM DIMMs detected and decoded: 4

[eccerr0r]

I don't even know if RDRAM had SPD eeproms on them, I suspect they do...

Some noname brands of RAM do not bother (or clear out) the SPD EEPROM, thus will return you invalid or incorrect values.

'lshw' unfortunately does not seem to report much data for me:

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     *-memory
          description: System memory
          physical id: 1
          size: 1012MiB

I have to use decode-dimms.pl to tell that I have two 512MB DDR DIMMs in this machine. However it can't tell that the board being capable to use either SDR xor DDR DIMMs.

[alex.blackbit]

yes of course. what a shame. i forgot about those tools.

[timeBandit]

that is cute.

Now compare with decode-dimms:
...
Module Height 30.0 mm

Bah, what utter rubbish, it doesn't even report the color of the ID label.

(Very cool tool.)

[phil_r]

Thanks guys, some useful apps there. Hadn't thought of lm-sensors (always good for a backup I suppose) and I'll give the other apps a shot and see what happens. Thanks a lot!