Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

NEC Ram Module

Posted on 2000-04-18
7
Medium Priority
?
399 Views
Last Modified: 2013-11-10
I have as NEC memory module with the following markings on each of the two chips: 4218160-70 and 9451AU600.

the back of the board contins the following:P7460 and P10-14B74600.

Can anyone advise me as to the capacity of the module and whether it is parity or not.
0
Comment
Question by:rlpp
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 7

Accepted Solution

by:
frache earned 200 total points
ID: 2727281


4218160 : 1Mb *16 soit 2Mo each chip
Fast page mode ( no EDO ram).

(http://www.necel.com/home.nsf/Main?ReadForm&Memory+Products)

2 chips = 4 Mo

70 = 70 ns : access time
9451 : 1994 - week 51 ( december)

2 chips : no parity ( no bits for parity )


Each module = 4Mo / 70 ns
0
 
LVL 7

Expert Comment

by:frache
ID: 2727330

More details :

1 Mb = 1 000 000 bit
1 octet = 8 bits
16 * 1 M = 16 Mb = 16/8 Mo = 2 Mo

1 module = 32 * 1 Mb = 32 Mb = 32/8 Mo= 4 Mo.

Parity : you need one bit more per octet
-> 4 (8+1) * 1 Mb = 36 Mb ... you have only 32 Mb
ECC    : you need two bits more per octet
-> 4 (8+2) * 1 Mb = 40 Mb ...




0
 

Author Comment

by:rlpp
ID: 2727463
Thanks for your help. This is information which NEC refused to answer.
0
Q2 2017 - Latest Malware & Internet Attacks

WatchGuard’s Threat Lab is a group of dedicated threat researchers committed to helping you stay ahead of the bad guys by providing in-depth analysis of the top security threats to your network.  Check out our latest Quarterly Internet Security Report!

 

Author Comment

by:rlpp
ID: 2730327
Thanks Frache.

Excuse my ignorance, but what is an Mo.
0
 
LVL 7

Expert Comment

by:frache
ID: 2733602

1 Mo = 8 Mb
1 Mb = 1024 bits

-> 1 Mo = 8 * 1024 * 1024 bits.
-> 1 bit = 1 binary data ( 0 or 1).

0
 

Author Comment

by:rlpp
ID: 2734487
Thanks for the clarification.
0
 
LVL 7

Expert Comment

by:frache
ID: 2734636
Ok, have a nice day.
0

Featured Post

NFR key for Veeam Agent for Linux

Veeam is happy to provide a free NFR license for one year.  It allows for the non‑production use and valid for five workstations and two servers. Veeam Agent for Linux is a simple backup tool for your Linux installations, both on‑premises and in the public cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the modern office, employees tend to move around the workplace a lot more freely. Conferences, collaborative groups, flexible seating and working from home require a new level of mobility. Technology has not only changed the behavior and the expe…
On Beyond Tools A conversation I recently had with the DevOps manager of a major online retailer really made me think about DevOps monitoring tools (https://www.onpage.com/devops-incident-management-tool/). The manager and I discussed how sever…
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…

618 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question