Question about EliteGroup P4VMM2 Motherboard

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Can't get new DDR memory to work.

Sorry, it's not as simple as that. After 5 years with this computer and P4VMM2 M/B and only 256 Megs of SDram, I decided to update the memory. I did the Crucial.Com scan and purchased 1 Gig. of DDR ram from them, to start with. Of course, after calling their support, they tell me I need to move or switch some "jumpers" around. I have no idea how to do this! Never seen it done. Their only help was to tell me I can get them at Radio Shack. I live in northern Canada and the closest Shack is south of the U.S. border. They do not sell to Canada. I can not find "jumpers" up here at all. I was hoping one of you would know of an alternate method of switching these jumper pins or where I can get them, other than the Shack. A link to a site that shows this operation in detail, would be appreciated greatly.

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  • jwfilion Jun 21, 2008

    TandN, your link to the Motherboard page did not work. However, I had a scan done some time ago and was told there was no need to update, as the Bios was current. I was told if it ain't broke, don't fix it. The Crucial support said the memory is the best update available and although it was not SDRam, as was the original, the DDR 2700 was faster. I'm not sure of the old memory. I will have to open the machine tomorrow and check out your observations. It is very confined in there. I also saw the JP1 jumper. It says it switches the voltage of the SDRam memory. I suppose I will have to switch this as well. I do not see any jumpers on the board. I do have an older computer I lent out and will check it as well. Talk to you then.

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(Here) is the (Motherboard version 5) on the web site. This is a link to a BIOS Flash. You need to go to the site and find your exact BIOS and flash it to see if it needs updated. You motherboard version should be stamped on the board. They have a lot of versions of this board so make sure you get the exact one. This board might know even know what that memory is until you flash it. Use your old memory to flash it. What is the speed of your old memory? Are you using the same type and speed of memory? Speed is not the gig size.

Posted on Jun 21, 2008

  • T&N Family Electronics Dean and Sherrie Terrell

    Try moving JP1 jumper over one slot. The manual shows this. Download the manual to see this. The jumpers should already be on the board. They have to be on there to work. You do not need to buy any. If you do not have one on the slot needed, look for an extra one on the board that is not used. You can use anything that will short the two pins. If you have an old hard drive it will have some possibly.

  • T&N Family Electronics Dean and Sherrie Terrell







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How many pins in the hyundai ddr 512mb?


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DDR SDRAM memory has 184 pins, where as SDRAM has 168 pins. DDR SDRAM Memory is a new type of SDRAM that is able to double the read / write speed of the previous generation of SDRAM memory. There are currently, PC2100 (DDR266), PC2700 (DDR333), PC3200 (DDR400), PC4200 (DDR533) These DIMMs are 184 Pin in size and are not interchangeable with older SDRAM modules.

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I have a Gateway 838GM. It has 4 slots for RAM. It came with 1/2 gig RAM (2 sticks, 256 Megs each). I tried installing new RAM- 2 sticks, 1 gig each. If I replace the original 2 sticks, the computer...


Here are the specifications of the Gateway 838GM: You will have to replace the existing memory with thesesettings only: The machine comes with: 512 MB = 256 MB (removable) + 256 MB PC3200DDR SDRAM DIMMs. Supports Dual Channel DDR Nowyou can only upgrade to 4.0 Gig total. I would recommend going to this link and order the correct memory foryour computer I use them quite a bit. http://www.memorystock.com/memory/Gateway838GM.html Rob

Dec 01, 2010 | Computers & Internet

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I need to buy memory for my computer its an emachines desktop model# T3410 512 MB DDR SDRAM and I dont know what to get


in DDR ram there is some models like ddr and ddr2 and another new model is DDR3. First you check what is your ram related to. for that in some pcs bios option system information the details are there. For that at the time of booting before windows logo press the button whatever is showing to enter setup. and check otherwise remove your ram and take that to a computer shop and take a new ram with same model.

And one more thing is you have to check your clock speed of your ram. Remove your ram from pc and check if any information is there on ram

Jun 24, 2010 | E-Machines eMachines Desktop PC

1 Answer

Wanting to findout what kinda ram i need to get for an upgrade. this computer only has 256mb.


SDRAM (Synchronous DRAM)
Almost all systems used to ship with 3.3 volt, 168-pin SDRAM DIMMs. SDRAM is not an extension of older EDO DRAM but a new type of DRAM altogether. SDRAM started out running at 66 MHz, while older fast page mode DRAM and EDO max out at 50 MHz. SDRAM is able to scale to 133 MHz (PC133) officially, and unofficially up to 180MHz or higher. As processors get faster, new generations of memory such as DDR and RDRAM are required to get proper performance.


DDR (Double Data Rate SDRAM)
DDR basically doubles the rate of data transfer of standard SDRAM by transferring data on the up and down tick of a clock cycle. DDR memory operating at 333MHz actually operates at 166MHz * 2 (aka PC333 / PC2700) or 133MHz*2 (PC266 / PC2100). DDR is a 2.5 volt technology that uses 184 pins in its DIMMs. It is incompatible with SDRAM physically, but uses a similar parallel bus, making it easier to implement than RDRAM, which is a different technology.

May 15, 2010 | Computers & Internet

5 Answers

Tried to upgrade ram with 2 new pc133 sticks of 256mb ea. Didn't work. What's wrong? Are there switches on the motherboard I need to change? Or something else?


No there are no DIP switches to change, or jumpers to move on your motherboard, in regards to your BIOS recognizing ram memory installed.
(BIOS. Basic Input/Output System. This tiny program, {64MB in size usually}, that is burned into your BIOS chipset, is what recognizes ram memory on your computer)

Things to know about the older Sdram ram memory.
1.It's really SDR Sdram. Single Data Rate Synchronous Dynamic Random Access Memory.
DDR is Double Data Rate Sdram, DDR2 is Double Data Rate 2 Sdram, and so on.

Point? All ram from SDR to DDR3, IS Sdram.

2.Standards have been set by JEDEC for computer ram memory starting from DDR Sdram on up. This standards were not implemented back in the day of SDR Sdram.

Point? Ram memory manufacturers didn't all follow the same standard, and ram memory made for one computer, would Not work in another computer.
This means you need THE ram memory for YOUR eMachines computer.

Main factors when buying SDR Sdram,
A.Correct type. You know this. SDR Sdram.
168 gold plated contact pins on the bottom of the ram 'stick'. (82 on each side)

B.Correct 'Speed'. ('Speed' is slang for Frequency Rate) You know this. SDR Sdram that operates at a frequency rate of 133MHz. (Or also known as PC133)

C.It must be low density Non-ECC ram memory. It cannot be high density ECC. (Error Control Correcting. Used for Server computers mostly)

D.Correct CAS Latency. Also known as Ram Timings. 3-3-3-3-2 would be normal for SDR Sdram.

E.Correct Chip Configuration. How the DRAM chips are accessed. DRAM chips are the black rectangular chips on each side of your ram memory 'stick'. Also what size the DRAM chips are in MegaBytes. (MB)

F.What the Maximum TOTAL Amount is for the motherboard. Is it 256MB? 512MB? Or more?

G.What the Maximum Amount is for EACH ram 'slot'. (Correct speak for 'Slot' is Bank)

H.Do you have four ram 'slots'? You MUST have a ram stick in Slot 1. This is the slot closest to the processor. It is the first ram slot the processor 'reads'.

Jul 12, 2009 | E-Machines eMachines Desktop PC

2 Answers

Graphics card upgrade


Not compatable at all.
DDR SDRAM memory uses 184 Pin Dimms
Double-Data-Rate Synchronous Dynamic Random Access Memory, better known as DDR SDRAM or DDR RAM for short, is a type of very fast computer memory. DDR RAM is based on the same architecture as SDRAM, but utilizes the clock signal differently to transfer twice the data in the same amount of time.

DDR2 SDRAM uses 240 Pin Dimms.
DDR2 SDRAM improves on DDR SDRAM by using differential signaling and lower voltages to support significant performance advantages over DDR SDRAM.

If your question has to do with buying a video card that is going to use DDR2 ram, that would be a faster graphics card. You can also get video cards with DDR3 ram which again is even faster.
Oddly enough in respect to system memory DDR2 is supposed to be faster than DDR yet the DDR memory cost more than the DDR2. Go figure.
Click the link for video cards.
http://www.tigerdirect.com/applications/category/category_slc.asp?CatId=318&
&
http://www.google.com/search?hl=en&q=XFX+AGP+8x+512MB+DDR2+video+card&btnG=Search

Need help with anything, feel free & ask.
Have a great weekend!
Mike

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1 Answer

Memory


Sorry you can only use DDR SDRAM. Here are the specs:

2 x 184-pin DIMM sockets support two 2.5V DDR SDRAMs(DDR400/333/266)
Maximum: 2GB
Here is a link to the specs of your motherboard:
http://www.mercury-pc.com/product-spec.php?productid=515

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P4VMM2 Motherboard problems with RAM Cards changing fron SDRAM to DDR


Depending on your version of motherboard, it may only take ddr when you change the motherboard jumpers, as i assume you have 2 SDRAM and 2 DDR slots, but you will need to refer to your manual

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