Identifying how many megs a RAM stick has

8bitbubsy · 22 April 2011, 01:11

I have a box full of old EDO RAM sticks, and I want to identify how many megs each of them are without the good old "insert into a machine and check" trick. Almost none of them have size on the stickers.
How can I do this? I guess I have to count how many chips it has got and interpret from the chip ID? I have no clue how I am supposed to "read" the chip ID...

prowler · 22 April 2011, 01:23

At this site you can just enter the RAM chip part numbers to find out the manufacturer and specifications:
http://www.chipmunk.nl/DRAM/ChipManufacturers.htm

dirkies · 22 April 2011, 02:29

I just google any reference found on the pcb of the stick, always find the specs on some site

8bitbubsy · 22 April 2011, 03:51

Well, many of my RAM sticks doesn't even have any serials or "brand" on it... Just on the ICs themselves.

pandy71 · 22 April 2011, 06:06

each IC have name - own unique number - search for IC - capacity of module will be direct capacity of all chips - short modules are 8 bit (+sometimes parity bit however it is not important) long 32 bits (4 bits parity sometimes - can be used to store additional data if parity not used but usually are not used)

Loedown · 22 April 2011, 07:40

Part numbers will give you data capacity but not ram geometry, I will be honest here, I cheat, I have a ram tester.

http://en.wikipedia.org/wiki/Memory_geometry

I haven't done the sums and technology changes all the time, confusing terms and no standards, I love the computer industry.

Jope · 22 April 2011, 12:22

This has come in handy over the years:

http://jope.fi/conversionchart.htm

I pilfered it from some site that has long since disappeared.

pandy71 · 22 April 2011, 22:09

Quote:

Originally Posted by Loedown

Part numbers will give you data capacity but not ram geometry, I will be honest here, I cheat, I have a ram tester.

http://en.wikipedia.org/wiki/Memory_geometry

I haven't done the sums and technology changes all the time, confusing terms and no standards, I love the computer industry.

Oh no, lot of modules are easy to discover only based on memory chips (size, organization, amount) - industry standarized this quite well - only rare modules for non-PC's, servers can b different.

22 April 2011, 01:11	#1
8bitbubsy Registered User Join Date: Sep 2009 Location: Norway Posts: 1,715	Identifying how many megs a RAM stick has I have a box full of old EDO RAM sticks, and I want to identify how many megs each of them are without the good old "insert into a machine and check" trick. Almost none of them have size on the stickers. How can I do this? I guess I have to count how many chips it has got and interpret from the chip ID? I have no clue how I am supposed to "read" the chip ID...

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22 April 2011, 01:23	#2
prowler Global Moderator Join Date: Aug 2008 Location: Sidcup, England Posts: 10,300	At this site you can just enter the RAM chip part numbers to find out the manufacturer and specifications: http://www.chipmunk.nl/DRAM/ChipManufacturers.htm

22 April 2011, 02:29	#3
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,297	I just google any reference found on the pcb of the stick, always find the specs on some site

22 April 2011, 03:51	#4
8bitbubsy Registered User Join Date: Sep 2009 Location: Norway Posts: 1,715	Well, many of my RAM sticks doesn't even have any serials or "brand" on it... Just on the ICs themselves.

22 April 2011, 06:06	#5
pandy71 Registered User Join Date: Jun 2010 Location: PL? Posts: 2,879	each IC have name - own unique number - search for IC - capacity of module will be direct capacity of all chips - short modules are 8 bit (+sometimes parity bit however it is not important) long 32 bits (4 bits parity sometimes - can be used to store additional data if parity not used but usually are not used)

22 April 2011, 07:40	#6
Loedown Precious & fragile things Join Date: Feb 2009 Location: Victoria, Australia Posts: 1,946	Part numbers will give you data capacity but not ram geometry, I will be honest here, I cheat, I have a ram tester. http://en.wikipedia.org/wiki/Memory_geometry I haven't done the sums and technology changes all the time, confusing terms and no standards, I love the computer industry.

22 April 2011, 12:22	#7
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,916	This has come in handy over the years: http://jope.fi/conversionchart.htm I pilfered it from some site that has long since disappeared.

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