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My Old Memory Modules

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army_ant7   06-02-2009 at 11:34:20 AM

I have two old memory modules. I don't understand somethings written on them.
I find these on label stickers on the module:
What is AM1? (It's written on both the chips and labels.)
What is UNB?
What is NCTI 06- 04?

These ones I found on the RAM chips themselves:
What is 9LA and9LZ?
What is 22561615M-6B?
What is 16Mx16?
What is DDR-7-T? (I know what DDR means, but what's -7-T?)

I also can't find the manufacturer. Where is that usually located on the RAM?

Sorry for all the questions. If you you could answer all, I would be eternally grateful! LOL! Thanks :P

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zipzoomflyhigh   06-02-2009 at 03:56:48 PM
- 0 +

The manufacturer of the chips puts their name right on the chip itself. (MT (micron technologies), nanya, samsung, etc.)

The 06-04 is obviously the date of man.
22561615m-6b probably means 256mb
DDR-7-T probably is the timing 7T or Cas 7
16M x 16 means it has sixteen 16mb chips, (probably double sided) meaning theirs chips on both sides of the dimm. (16mbx16=256mb)

The rest is probably manufacturer jibberish, item number, part numbers, etc.


Message edited by zipzoomflyhigh on 06-02-2009 at 03:57:17 PM
------------------------------ P965/Q6700@3.2 8MB HD4850 OC Edition
4GB Corsair XMS 800
Vista64/Win7
Fatality 550w/Antec 300
 Reply to zipzoomflyhigh
army_ant7   06-03-2009 at 11:45:00 AM
- 0 +

But the RAM is 128MB. Anyway thanks dude.

Does anyone know what AM1 and UNB mean?

Reply to army_ant7
zipzoomflyhigh   06-03-2009 at 12:53:39 PM
- 0 +

It cant be 128mb, 16mb x16 = 256mb, Also the number 256 is in the part number, not 128.

Maybe the two sticks are part of a 256mb kit. Therefore labeled as 256. (2- 128mb sticks)

UNB stands for unbuffered, who knows what AM1 means.


Message edited by zipzoomflyhigh on 06-03-2009 at 12:54:24 PM
------------------------------ P965/Q6700@3.2 8MB HD4850 OC Edition
4GB Corsair XMS 800
Vista64/Win7
Fatality 550w/Antec 300
 Reply to zipzoomflyhigh
TheDraac   06-03-2009 at 07:27:22 PM
- 0 +

Can you post a picture of exactly what your looking at....

Reply to TheDraac
army_ant7   06-03-2009 at 08:50:51 PM
- 0 +

Here:

http://img190.imageshack.us/img190/5903/image003kgn.jpg

http://img193.imageshack.us/img193/7430/image002qqr.jpg

They're kinda dark, but you can still see the AM1. The UNB is in the lower-left corner of the label.

Reply to army_ant7
TheDraac   06-03-2009 at 11:07:52 PM
- 0 +

I can't really see in your pics.... but I believe your chips are marked as follows....

AM1 9LA
22561615M -6B
??????? DDR-7-T

AM1 = Apacer Technologies, Manufacturer of the chips
9LA = Manuf code... date, run, lot (not sure, no specifics)
22561515M = chip id, model number
-6B = Usually the chips "speed grade"
????? , not sure what's there... is it the 16Mx16???
16Mx16 = Internal chip memory configuration. 16Meg bits x 16 bits
DDR-7-T = DDR, double data rate, -7-T = could be timing??? Not sure.

NCTI 06-04 = not sure where your reading that, anyway, I'm not sure... Manuf codes.

And finally UNB on the label = Unbuffered, the type of RAM normally used on desktop computers. Buffered memory is almost always used on servers and mission critical computers. Buffered memory data is more reliable.

I'd give you more info but I can't seem to find the needed datasheet on the 22561615m chips.

I will say it is PC2700/DDR333 with a CAS of 2.5.


Message edited by TheDraac on 06-03-2009 at 11:08:57 PM
Reply to TheDraac
army_ant7   06-04-2009 at 01:37:22 PM
- 0 +

Here, I'll try to mimic the label:

_________________________________
| (serial lines) P/N:73.74498.892 |
| (serial lines) S/N:2304255-01153|
| 128MB UNB PC2700 AM1 |

I can't put the under border of the label. LOL!

The other information is on the chips themselves... You already stated them.

Thanks for the info... I thought AM1 was something like AM2... LOL! Stupid me.

Thanks a lot though...

Reply to army_ant7
zipzoomflyhigh   06-04-2009 at 02:27:24 PM
- 0 +

Looks like it says 128mb pc2700, of course he failed to mention these numbers in his original post lol.

------------------------------ P965/Q6700@3.2 8MB HD4850 OC Edition
4GB Corsair XMS 800
Vista64/Win7
Fatality 550w/Antec 300
 Reply to zipzoomflyhigh
army_ant7   06-05-2009 at 11:46:21 AM
- 0 +

Yeah... It was just that I already know those. I just wanted to know about the rest of the info... Hehehe...

Reply to army_ant7
wuzy   06-05-2009 at 12:27:15 PM
- 0 +

Quote :

What is 22561615M-6B?


...256... means 256Mbit per chip. Your module has 4 chips so 4x256/8=128Mbyte.
-6B means 1000/6=166.67Mhz (333DDR) and hence PC2700.

Since your module doesn't specify what timing it uses that means it'll default to JEDEC spec. which for PC2700 is 3-3-3-xx 2T. You can overclock and tighten its timing through more vDIMM of course, but your luck may vary.


Message edited by wuzy on 06-05-2009 at 12:28:06 PM
------------------------------ GTL Ref Tweaking Guide - PM for detail
Brand is for the weak-minded, only product matters.
Resilient to marketing.
http://farm3.static.flickr.com/2520/3850950213_aea6bbbcfe_o.jpg
 Reply to wuzy
army_ant7   06-06-2009 at 04:50:53 AM
- 0 +

WOW! So that's what the -6B means. And I didn't think of the x4 chips part. No wonder it adds up to 128 MB. Hehehe... I have a low I.Q. you see. LOL!!!

Reply to army_ant7
army_ant7   06-06-2009 at 05:15:53 AM
- 0 +

Here are some clearer pictures of my RAM's:

http://img294.imageshack.us/img294/780/image004j.jpg


http://img223.imageshack.us/img223/3539/image005llc.jpg


http://img176.imageshack.us/img176/3752/image006m.jpg


http://img34.imageshack.us/img34/7201/image007r.jpg


You'll notice that the NCTI is on the label to the side.

Reply to army_ant7
TheDraac   06-06-2009 at 09:29:49 AM
- 0 +

WOW, I was gonna disagree with wuzy on his 4 chip only description. As I've personally NEVER seen only 4 chips on a RAM module, and it was hard for me to notice only four chips in your original pictures.

I was however getting confusing info on the 22561615M -6B chip usage. I was seeing the same chips being used on 256MB modules with 8 chips and the 16Mx16 would in fact indicate 256Meg bit memory chips.

16Mx16 normally means an internal chip configuration of:

4Mbits words x 16bits x 4banks.
4Mbit x 4banks = 16Mbits
16Mbits x 16bits = 256Mbit So 256Mbits x 8 chips (1 byte = 8 bits) = 256 MByte or in your 4 chip module, 128 Mbytes.

So only 4 chips to make a 128MB module makes sense to me now. Wow, I've just never seen that before. 8 chips, 9 chips, 16 and 18 chips, but not just 4.

And you said CLEARER pictures.... My eyes are still buggin.... LOL

As for the NCTI, my guess is it's the module sellers ID label. Can't pin down any info on that tho.

Here's a link to some pictures of a 256MB module from a Chinese website, you can almost make out the printing on the chips.

http://goods.ruten.com.tw/item/show?11080214287162


Message edited by TheDraac on 06-06-2009 at 09:30:26 AM
Reply to TheDraac
army_ant7   06-07-2009 at 01:29:39 PM
- 0 +

LOL! Sorry... I only have a 2 megapixel camera on a cell phone... Hehehe... Sorry for not mentioning the additional info before. And, again, I have to say, thank you to all...

Reply to army_ant7
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