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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 08-23-2004, 11:52 AM   #1
smithtodda
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Determining RAM speed


This might be wishful thinking, but is there a command I can run from the command line that'll return the speed of the RAM in my machine? The mainboard documentation says it'll run 200/266/333/400, but I'd like to know the speed of the stick that's already in there. If it helps, I'm running SuSE 9.1 Pro on an ASUS A7N8X mainboard. Thanks.
 
Old 08-23-2004, 12:47 PM   #2
kilgoretrout
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The easiest way to find out is look in your bios setup.
 
Old 08-23-2004, 12:56 PM   #3
J.W.
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What kind of RAM are you using? Most likely you should be able to find the technical specs for the model number (assuming it's printed somewhere on the stick) -- J.W.
 
Old 08-23-2004, 02:59 PM   #4
smithtodda
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great username, kilgoretrout. i like vonnegut very much myself. i looked in the bios, but couldn't find a reference to the mhz of the memory, just that i'm using one 512mb stick in the first of three slots.

j.w., i haven't cracked the case yet and looked at the stick itself, but i've had little luck with that in the past. i've never understood why they don't print that stuff in layman's terms on the stick itself. would it kill them? anyway, i'll do as you suggest.

btw, i also ran suse's hardware profiler tool (forgot what it's actually called), and while it seems thorough and informative, it also doesn't list this exact information that i need.

thanks to the both of you for your replies.

todd
 
Old 03-21-2014, 11:45 AM   #5
Lyxix
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Easy answer...

I know it's been a while, but I never saw that you got an answer to your question:

dmidecode is your magic weapon. I typically run:

# dmidecode | less

...then I search for /DIMM and it jumps me right to the memory section, where you see:

Handle 0x1101, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: FB-DIMM
Set: 1
Locator: DIMM2
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 533 MHz
Manufacturer: 80AD808980AD
Serial Number: 4070000E
Asset Tag: 010709
Part Number: HYMP564B72BP8N2-C4
Rank: 1

There will be an entry for each of the DIMMs you have in there.

Hope this helps (if not you, then whoever else searches this database).

-Lyxix
 
Old 03-21-2014, 12:43 PM   #6
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dmidecode may be wrong, as it is on a number of my laptops and netbooks. Check the RAM stick itself (the definitive way) or the BIOS for the most reliable answers.
 
Old 03-21-2014, 12:59 PM   #7
johnsfine
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Quote:
Originally Posted by metaschima View Post
dmidecode may be wrong, as it is on a number of my laptops and netbooks. Check the RAM stick itself (the definitive way) or the BIOS for the most reliable answers.
If dmidecode results differs from the label on the ram stick, I would tend to trust dmidecode, rather than the label on the ram stick.

I'm pretty sure the BIOS gets its info the same place dmidecode does. If that differs from both dmidecode and the label, I would guess the BIOS is mixing in some motherboard or setting constraints (and is thus more definitive). If BIOS and physical label agree and dmidecode disagrees (what you seem to be reporting), I don't have a good explanation. I might start to suspect the vendor who packaged the system of having cheated in some way.
 
Old 03-22-2014, 03:16 AM   #8
cascade9
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Quote:
Originally Posted by metaschima View Post
Check the RAM stick itself (the definitive way) or the BIOS for the most reliable answers.
+1, checking the stick is the only way to be sure.

Quote:
Originally Posted by johnsfine View Post
If dmidecode results differs from the label on the ram stick, I would tend to trust dmidecode, rather than the label on the ram stick.

I'm pretty sure the BIOS gets its info the same place dmidecode does. If that differs from both dmidecode and the label, I would guess the BIOS is mixing in some motherboard or setting constraints (and is thus more definitive). If BIOS and physical label agree and dmidecode disagrees (what you seem to be reporting), I don't have a good explanation. I might start to suspect the vendor who packaged the system of having cheated in some way.
It gets rather complicated, but some RAM sticks have odd/nonstandard/wrong SPD (serial presence detect).

Even in cases where the SPD is right, and the RAM settings are on 'auto' in the BIOS, you can still get 'wrong' speed reported.

E.g. this from my system-

Code:
Handle 0x0026, DMI type 17, 27 bytes
Memory Device
        Array Handle: 0x0024
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 4096 MB
        Form Factor: DIMM
        Set: None
        Locator: A1
        Bank Locator: Bank2/3
        Type: Unknown
        Type Detail: None
        Speed: 1333 MHz
        Manufacturer:  
        Serial Number:  
        Asset Tag:  
        Part Number:
KCorsair XMS3 8GB (2 x 4GB) DDR3 1600 CL9, CMX8GX3M2A1600C9. Running @ 1333 (well, not really, but lets not go there now) because that is the max non-overclocked RAM speed for my memory controller.
 
Old 03-22-2014, 02:45 PM   #9
business_kid
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I found the statistics in the top left corner of display on memtest86 fairly good.
 
  


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