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  • Can you tell DDR and DDR2 apart visually?

    - by Macha
    I'm getting a few old computers to take apart for parts soon. Most of them are defintely using DDR2 RAM, but there is the possibility that one or two of them are using DDR RAM. Since these are quite old, the manuals have since been lost. Is it possible to tell DDR and DDR2 RAM apart visually, and if so how?

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  • 4 GB DDR2 vs 2 GB DDR 3...........

    - by metal gear solid
    I 'm going to purchase new PC. due to my budget limit either i can purchase 2 x 2GB = 4GB DDR 2 or 2 GB Single stick DDR 3. Will 2 GB DDR 3 will give almost same performane compare to 4 GB DDR 2? In future I will upgrade RAM upto 8 GB Which option would be better for me for now and why?

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  • Flushing writes in buffer of Memory Controller to DDR device

    - by Rohit
    At some point in my code, I need to push the writes in my code all the way to the DIMM or DDR device. My requirement is to ensure the write reaches the row,ban,column of the DDR device on the DIMM. I need to read what I've written to the main memory. I do not want caching to get me the value. Instead after writing I want to fetch this value from main memory(DIMM's). So far I've been using Intel's x86 instruction wbinvd(write back and invalidate cache). However this means the caches and TLB are flushed. Write-back requests go to the main memory. However, there is a reasonable amount of time this data might reside in the write buffer of the Memory Controller( Intel calls it integrated memory controller or IMC). The Memory Controller might take some more time depending on the algorithm that runs in the Memory Controller to handle writes. Is there a way I force all existing or pending writes in the write buffer of the memory controller to the DRAM devices ?? What I am looking for is something more direct and more low-level than wbinvd. If you could point me to right documents or specs that describe this I would be grateful. Generally, the IMC has a several registers which can be written or read from. From looking at the specs for that for the chipset I could not find anything useful. Thanks for taking the time to read this.

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  • Upgrading RAM in HP Compaq d530

    - by Mike
    I want to upgrade my hp compaq d530 from 1.2GB to 4GB of RAM. I look at the specs: http://h18000.www1.hp.com/products/quickspecs/11632_ca/11632_ca.html and saw that I could get up to 4GB of RAM that is DDR, PC3200. So, I got 4GB of RAM. I ordered 4 of these http://www.ebay.com/itm/190398777195?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649. When I installed all 4 I get 5 beeps and 5 red blinks which I've concluded means I'm having a memory problem. When I switch back to 1.2 GB it works fine. I was wondering, am I doing something wrong?

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  • PC can't detect second RAM installed

    - by kulwinder
    I have PC with 512 MB RAM installed (motherboard manufacture MICRO STAR, chipset P4M800), pc was running very slow so I decided to upgrade the ram. I installed CPU-Z and check the ram installed on the machine, also had a look at the stick installed. 512 MB PC 3200 400 MHz DDR but my mother supports 200 MHz and it was working ok. So I bought 2GB which I checked on manual that it support upto 2 GB Ram. So I installed 2GB PC 3200 400 MHz same as the old one, I plugged in both eventhough motherboard only support upto 2 GB but system spec only shows 512 (deducts 64 MB shared vga memory) I checked on CPU-Z, it detects both, slot 1 512 MB, slot 2 2048 MB, comparing screen for both slots, both the same, volt 2.5, frequency 166 MHz and 200MHz, only difference on those is 2gb ram shows under timings table 133MHz 166 MHz and 200MHz but 512 MB shows only 166MHz and 200MHz. I checked on Google and can't seems to figure out whats wrong with it. If I only plug in 2GB. Pc doesn't boot up like ram not working.With only 512 MB plugged in seems ok. Please help.

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  • How can I see if my server uses DDRII or DDRIII RAM?

    - by Temnovit
    I have a very newbie question. My server is running out of RAM and it is time to add some. The is located far away, and I need to buy some RAM and drive to install it. How can I determine, whether I need to buy DDRII or DDRIII, having only command line access via SSH? Is there some command that will print witch kind of RAM is supported by the server or I need to go and check the server physically? UPDATE Sorry, forgot to mention: I am using Ubuntu Server 9.04

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  • Can ECC registred RAM 512 MB DDR-400 be used on thinclients - specifically Neoware CA10/CA22?

    - by Ramaswami Murugan
    Can ECC registered RAM 512 MB DDR-400 be used on thin clients - specifically Neoware CA10/CA22? Neoware thin clients (now HP Thin clients e100/e140) have 2 slots for a max of 1 Gb of DDR-400 RAM (184 Pin PC3200). I notice that the price of ECC reg RAM is considerably less than that of non-reg RAM ($10 for ECC reg 512 MB vs $24 for non-ECC reg 512 MB) so this approach is worth it for me to upgrade my memory on numerous thin clients (approx 40). The BIOS is Phoenix E686 and the chipset is VIA 800MHz - 1 Ghz.

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  • ubuntu dmidecode is not functioning properly

    - by Alaa Alomari
    dmidecode is giving irrelevant and conflicted results. it shows that i have two slots while the correct is 8 (the board is Tyan S5350.) uname -a Linux synd01 3.0.0-16-server #29-Ubuntu SMP Tue Feb 14 13:08:12 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux root@synd01:/home/badmin# dmidecode -t 16 dmidecode 2.9 SMBIOS 2.33 present. Handle 0x0011, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 4 GB Error Information Handle: Not Provided Number Of Devices: 2 while root@synd01:/home/badmin# dmidecode -t 17 | grep Size Size: No Module Installed Size: No Module Installed Size: 1024 MB Size: 1024 MB Size: No Module Installed Size: No Module Installed Size: 1024 MB Size: 1024 MB also lshw shows: *-memory description: System Memory physical id: 11 slot: System board or motherboard size: 4GiB *-bank:0 description: DIMM DDR Synchronous 166 MHz (6.0 ns) [empty] physical id: 0 slot: J3B1 clock: 166MHz (6.0ns) *-bank:1 description: DIMM DDR Synchronous 166 MHz (6.0 ns) [empty] physical id: 1 slot: J3B3 clock: 166MHz (6.0ns) *-bank:2 description: DIMM DDR Synchronous 166 MHz (6.0 ns) physical id: 2 slot: J2B2 size: 1GiB width: 64 bits clock: 166MHz (6.0ns) *-bank:3 description: DIMM DDR Synchronous 166 MHz (6.0 ns) physical id: 3 slot: J2B4 size: 1GiB width: 64 bits clock: 166MHz (6.0ns) *-bank:4 description: DIMM DDR Synchronous 166 MHz (6.0 ns) [empty] physical id: 4 slot: J3B2 clock: 166MHz (6.0ns) *-bank:5 description: DIMM DDR Synchronous 166 MHz (6.0 ns) [empty] physical id: 5 slot: J2B1 clock: 166MHz (6.0ns) *-bank:6 description: DIMM DDR Synchronous 166 MHz (6.0 ns) physical id: 6 slot: J2B3 size: 1GiB width: 64 bits clock: 166MHz (6.0ns) *-bank:7 description: DIMM DDR Synchronous 166 MHz (6.0 ns) physical id: 7 slot: J1B1 size: 1GiB width: 64 bits clock: 166MHz (6.0ns) what might cause this conflict and how can i fix it? Thanks

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  • Any dangers in using DDR memory with a higher frequency than the FSB?

    - by raw_noob
    I'm looking to upgrade memory in an older motherboard. The processor is an AMD Sempron 2500+ with a maximum speed of 333/166MHz. The motherboard is an MSI MS-7061 (KV3M-V), which accepts up to 2Gb of DDR memory maximum PC2700 in 2 slots and has a maximum FSB of 333MHz. The board does not have dual-channel support. Existing memory includes a stick of 512Mb PC3200, which seems to be running OK (presumably at PC2700) but is rated 200MHz, which is below the FSB speed. The other stick is 256Mb PC2100/133MHz, again below the FSB speed. (All figures from CPU-Z.) I have a chance to acquire a single used stick of PC3200/400MHz memory very cheaply. Crucial's system scanner seems to suggest that this will be OK with my system, but other sites have suggested that running memory with a higher frequency than the FSB can cause instability. Is this true? Would I be better waiting until I can buy the correct PC2700/333MHz stick? I'm assuming that the mixed memory I have at present is running as 768Mb at 133MHz. Is this a reasonable assumption? If so, would you expect the performance differences between 768Mb/133MHz and 1Gb/333MHz to be very noticeable? If I install the new 1Gb/400 or 333MHz stick in slot 1, am I right in thinking that adding back the existing 512Mb/200MHz stick in slot 2 would pull the whole 1.5Gb system memory speed down to 200MHz? If so, which would be better - 1.5Gb/200MHz, or the single 1Gb stick at the full 333MHz that the FSB permits? Is more headroom more important than extra speed? Any help - or even opinions - gratefully received. I can't find reliable information, and I can't afford to make expensive mistakes.

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  • Only some motherboards can support faster RAM?

    - by Wesley
    This is a question relating to one of my builds. Here are the specs: ECS P4VXASD2+ V5.0 motherboard Intel P4 Northwood 2.8 GHz (533 MHz FSB, 512 KB L2) 2x 1GB PC3200 DDR RAM Maxtor 300GB IDE HDD 16 MB NVIDIA TNT2 Pro AGP OKIA 300W ATX PSU Gigabyte 52x CD-ROM The issue right now is that I'm trying to install Windows XP from the CD drive but the computer randomly restarts partway through installation. My other build was BSODing due to RAM latency errors. This ECS board manual states that memory modules "up to 333 MHz" (i.e. PC2700) is supported. However, I am running PC3200 modules, which is clearly faster than PC2700. Would this be causing the computer from randomly restarting? EDIT 1: I also wanted to mention that my Emachines T2482 is actually running 2x 512MB PC3200 DDR RAM when it should only be supporting PC1600 and PC2100 DDR RAM. Yet there are no issues with it.

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  • [SQLServer JDBC Driver][SQLServer]Could not find stored procedure 'master..xp_jdbc_open2'.

    - by Vijaya Moderator -Oracle
    When connecting to MS SQL Server Database via Weblogic Datasource and using XA jdbc driver, the following error is thrown. <Jun 3, 2014 5:16:49 AM PDT> <Error> <Console> <BEA-240003> <Console encountered the following error java.sql.SQLException: [FMWGEN][SQLServer JDBC Driver][SQLServer]Could not find stored procedure 'master..xp_jdbc_open2'. at weblogic.jdbc.sqlserverbase.ddb_.b(Unknown Source)at weblogic.jdbc.sqlserverbase.ddb_.a(Unknown Source)at weblogic.jdbc.sqlserverbase.ddb9.b(Unknown Source)at weblogic.jdbc.sqlserverbase.ddb9.a(Unknown Source)at weblogic.jdbc.sqlserver.tds.ddr.v(Unknown Source)at weblogic.jdbc.sqlserver.tds.ddr.a(Unknown Source)at weblogic.jdbc.sqlserver.tds.ddq.a(Unknown Source)at weblogic.jdbc.sqlserver.tds.ddr.a(Unknown Source)at weblogic.jdbc.sqlserver.ddj.m(Unknown Source)at weblogic.jdbc.sqlserverbase.ddel.e(Unknown Source)at weblogic.jdbc.sqlserverbase.ddel.a(Unknown Source)  The cause behind the issue is that  the MS SQL Server was not installed with the Stored procedures to enable JTA/XA Solution To connect to SQL Server via XA Driver from WLS Datasource you need to install Stored Procedures for JTATo use JDBC distributed transactions through JTA, your system administrator should use the following procedure to install Microsoft SQL Server JDBC XA procedures. This procedure must be repeated for each MS SQL Server installation that will be involved in a distributed transaction.To install stored procedures for JTA:1. Copy the appropriate sqljdbc.dll and instjdbc.sql files from the WL_HOME\server\lib directory to the SQL_Server_Root/bin directory of the MS SQL Server database server, where WL_HOME is the directory in which WebLogic server is installed, typically c:\Oracle\Middleware\wlserver_10.x.  Note:  If you are installing stored procedures on a database server with multiple Microsoft SQL Server instances, each running SQL Server instance must be able to locate the sqljdbc.dll file.Therefore the sqljdbc.dll file needs to be anywhere on the global PATH or on the application-specific path. For the application-specific path, place the sqljdbc.dll file into the :\Program Files\Microsoft SQL Server\MSSQL$\Binn directory for each instance. 2. From the database server, use the ISQL utility to run the instjdbc.sql script. As a precaution, have your system administrator back up the master database before running instjdbc.sql. At a command prompt, use the following syntax to run instjdbc.sql:  ISQL -Usa -Psa_password -Sserver_name -ilocation\instjdbc.sql  where:  sa_password is the password of the system administrator.  server_name is the name of the server on which SQL Server resides.  location is the full path to instjdbc.sql. (You copied this script to the SQL_Server_Root/bin directory in step 1.)  The instjdbc.sql script generates many messages. In general, these messages can be ignored; however, the system administrator should scan the output for any messages that may indicate an execution error. The last message should indicate that instjdbc.sql ran successfully. The script fails when there is insufficient space available in the master database to store the JDBC XA procedures or to log changes to existing procedures.

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  • Computer always freezing after random periods of time. No errors listed.

    - by Wesley
    Hi, all. Here are my specs beforehand: AMD Athlon XP 2400+ @ 2.00 GHz, 160GB IDE HDD, 128MB GeForce 6200 AGP, 2 x 512MB PC3200 DDR RAM, CoolMax 350W PSU, 1 x CD-RW Drive, 1 x DVD-ROM Drive, FIC AM37 Mobo, Windows XP Pro SP3 My desktop freezes after random periods of time but there are no errors listed in the Event Viewer after a forced shutdown and restart. A couple months ago, I found that when it froze, the floppy was being accessed at the same time. So, I disconnected the floppy (since I never used it anyways) from the power supply and motherboard. Everything was working fine and the computer never froze. This past Christmas break, I left for a Conference and when I got home, the computer kept freezing again. So, this time, I just disconnected the DVD reader (from mobo and power) and started it up. Still, it froze almost right away. Then I found some older sticks of RAM (2 x 256MB PC2100 DDR) and swapped them in. Everything worked fine again after that. I even swapped the 2 x 512MB PC3200 DDR RAM back in and everything worked okay. Then it started freezing again, and I tried all possible RAM combos, still freezing within 5-10 minutes of startup. One thing I've realized is that the floppy drive is still listed in My Computer and I uninstalled it from my Device Manager already. There were no software errors, and I uninstalled the most recent software, with no effect. Still, I have no idea what is wrong because everything ran fine before that. Any suggestions? EDIT: Still have yet to buy some blank CD media to use Memtest86+. However, would a lack of virtual memory cause the computer to freeze? EDIT2: So after a long time, I ran Memtest86+ and all is well. Turns out though, after removing my original DVD reader and replacing it with a DVD-ROM drive, there is no freezing whatsoever! Thanks for all your suggestions!

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  • MS SQL Query Sum of subquery

    - by San
    Hello , I need a help i getting following output from the query . SELECT ARG_CONSUMER, cast(ARG_TOTALAMT as float)/100 AS 'Total', (SELECT SUM(cast(DAMT as float))/100 FROM DEBT WHERE DDATE >= ARG.ARG_ORIGDATE AND DDATE <= ARG.ARG_LASTPAYDATE AND DTYPE IN ('CSH','CNTP','DDR','NBP') AND DCONSUMER = ARG.ARG_CONSUMER ) AS 'Paid' FROM ARGMASTER ARG WHERE ARG_STATUS = '1' Current output is a list of all records... But what i want to achieve here is count of arg consumers Total of ARG_TOTALAMT total of that subquery PAID difference between PAID & Total amount. I am able to achieve first two i.e. count of consumers & total of ARG _ TOTALAMT... but i am confused about sum of of ...i.e. sum (SELECT SUM(cast(DAMT as float))/100 FROM DEBT WHERE DDATE >= ARG.ARG_ORIGDATE AND DDATE <= ARG.ARG_LASTPAYDATE AND DTYPE IN ('CSH','CNTP','DDR','NBP') AND DCONSUMER = ARG.ARG_CONSUMER) AS 'Paid' Please advice

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  • Should I install Windows 7 on a 3 years old PC?

    - by Jitendra vyas
    This is my PC configuration, Should I upgrade my Windows XP to Windows 7. Currently I'm using Windows XP SP3 32 bit. Now will I get same performance or better performance or bad performance if I install Windows 7 on this system? Or would sticking with XP be better? Memory (RAM): 1472 MB DDR RAM (not DDR 2) CPU Info: AMD Sempron(tm) Processor 2500+ CPU Speed: 1398.7 MHz Sound card: Vinyl AC'97 Audio (WAVE) Display Adapters: VIA/S3G UniChrome Pro IGP | NetMeeting driver | RDPDD Chained DD Network Adapters: Bluetooth Device (Personal Area Network) | WAN (PPP/SLIP) Interface Hard Disks: 300 GB SATA HDD Manufacturer: Phoenix Technologies, LTD Product Make: MS-7142 AC Power Status: OnLine BIOS Info: AT/AT COMPATIBLE | 01/18/06 | VIAK8M - 42302e31 Motherboard: MICRO-STAR INTERNATIONAL CO., LTD MS-7142 Modem: ZTE USB Modem FFFE CDMA :

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  • SAN cache memory upgrade

    - by Scott Lundberg
    We currently have an IBM DS4300 Dual Controller Fibre SAN. It is a good box, but getting pretty old. It came with 256MB of cache per controller. Recently we replaced the batteries in one of the controllers and noticed that the cache is a DDR PC2100 ECC DIMM. Of course, we are thinking about how cheap this RAM is now and is there any good reason we can't upgrade the RAM. IBM used to have a "Turbo" upgrade to this box that doubled the cache and had a bunch of software features for about 10K USD. Since that product has been end-of-lifed, I don't think we can get that upgrade and we don't need the software upgrades (FlashCopy, StorageCopy, etc). Besides the obvious potential warranty issue, what if any issues would we expect to see if attempting to put 2 - 1GB DIMMS in this unit? Any other things I am missing here? EDIT: Memory label: Samsung CN 0433 PC2100U-25331-A1 M381L3223ETM-CB0 256MB DDR PC2100 CL2.5 ECC

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  • How do I install lubuntu? (kernel panic)

    - by melvincv
    Please help me install Lubuntu 12.04 i386 on an old computer. I select the "Try Lubuntu without installing" and it crashes with a kernel panic. Rarely I do get to the live OS, but soon the display goes blank. The messages log gives me '[drm] ERROR GPU hung/wedged' The specs are: Pentium 4 2.4GHz 1GB DDR RAM 40GB PATA HDD Intel 845GL chipset (8MB framebuffer, 64MB shared system memory set in the BIOS)

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  • How to get the installed Memory Type

    - by balexandre
    Windows 7 could be better at this, it tells everything about the computer CPU but only the Memory amount Microsoft should add information about DDR type, speed and maybe CL as well. While this never happens, What's the best and easy way to check the installed memory so we can buy and upgrade it? I was thinking a simple software so I don't need to install the full SiSoft Sandra for example, just looking for something small, only for the memory part.

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  • Real performance gain from faster IDE or SATA hard drive?

    - by raw_noob
    How much of a real-world performance gain would you expect from: replacing a 5400rpm IDE HD with a 7200rpm IDE HD? replacing a 5400rpm IDE HD with a SATA-150? It's assumed that the drive in question is both the system drive and the only drive. A modest AMD Sempron-based home computer with adequate DDR memory running Windows XP Home SP3. Thanks for looking.

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  • Per bytes RAM memory acess

    - by b-gen-jack-o-neill
    Hi, I have just a simple question. Today memory DDR chips are 64 bits wide, and the CPU data bus is also 64 bits wide. But memory is stil organised in single bytes. So, what I want to ask is, when CPU selects some memory adress, it should be one byte, right? Becouse the lowest memory portion you can access is 1 byte. But, if you get 1 byte per 1 adress, why is memory bus 8 bytes wide?

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  • what virtual machine should dell poweredg sc 1425 install?

    - by Nguyen Khanh Huy
    I'm intalling our local server and want to install a virtual machine but it seem vmware ESXi is not suit with our server Server: Dell SC 1424 CPU : 2 Xeon 3.2G (buss 800, cache L2 2M) Ram: 6G DDR ECC 266 Hard disk: 2 Hitachi Sata 1TB. Raid Dell Cerc 2s ( raid 0, 1) Nic: 2 Broadcom 1Gb/s I'm wondering if you're familiar with this area and have any idea about a VM software for our server. Just wanted to use server for some purposes ( web hosting, subversion and to experience some server OSs) Thank you for helping.

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  • Memory upgrade for Toshiba P20 S203?

    - by pjc50
    I've had an offer of a 256MB PC2700 SODIMM, apparently from an iBook, to upgrade a Toshiba laptop. Is that suitable? I've seen "DDR 266 SODIMM" on sale as the official upgrade memory. How in general should I work this out? I've long since lost track of what memory goes with what system.

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