Question about Compaq Presario 700 470024-192 Notebook

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Diff between SDRAM and DDRAM

I want to know the pros & cons of both RAM.

Which 1 is good?

All the related information.

Thank you

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Only one of those will work in any computer. Synchronous Dynamic Random Access Memory is older and slower, Double Density Random Access Memory is faster and DDR2 is newer. The notch in the connector edge will not match the RAM slot if you have the wrong one. Also the DDRAM has various speeds to match the bus speed of the motherboard so designators like PC2100, PC2700, PC3200, etc. are important and correspond to 266MHZ, 366MHZ, 400MHZ, and so on. Notebook use SODIMM RAM and have the corresponding DDR, DDR2 designators but still have notches that must match the slot. When you buy RAM just provide the model of your computer as each manufacturer has numbers that are all designed to confuse it seems and there may be no chance of exchanging the memory after you open the package. Steve

Posted on Oct 16, 2008

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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

2 Answers

Can I put different types of RAM on a motherboard?


Not different types per se, but you may be able to put different speeds.

Type would be like DDR Sdram2_bing.gif, or DDR2 Sdram for example.

Speed is a slang term for Frequency Rate. What frequency rate does the ram memory2_bing.gif module (Stick) operate at.

Example: DDR2 Sdram that has a frequency rate of 667MHz. (PC2-5300) MHz stands for MegaHertz.

Mega = approximately 1 Million. Hertz stands for Cycles per Second.

The above ram memory module operates at 667 Million Cycles per Second.

If you install two ram modules that have a different frequency rate, all the ram memory installed will operate at the slower frequency rate.

(Provided the computer will support more than just one frequency rate)

Have a computer in mind, or is this just a generic question? A what if?


Reply to your recent comment:

If this is in relation to two different manufactures of your ram memory, it shouldn't be a problem.

Where you may get into trouble in this area, is if one ram memory module (Stick) is generic, or low budget, and one ram memory module is a high performance gamer ram memory.

Without knowing the exact manufacturer of your computer, plus the Model name of it, and also knowing the information you have about your ram memory 'sticks', the following information is just generic, or general information.

High performance ram memory may use a higher voltage. Not always, but a good portion of the time.

High performance ram may also use a faster set of ram timings.
It may also have high density DRAM chips, and the chip configuration may be setup differently.

(The black rectangular modules you see on the side of a ram memory 'stick', are DRAM chips)

To explain so far;

SDR Sdram was the typical ram memory for years after SIMM ram memory.
SDR stands for Single Data rate.
Commonly just referred to as Sdram, but in actuality that is erroneous.

(Sdram stands for Synchronous Dynamic Random Access Memory)

Then came DDR Sdram.
Double Data Rate Sdram.
Then DDR2 SDram.
Double Data Rate 2 Sdram.
Then DDR3 Sdram.
Double Data Rate 3 Sdram.

1) http://en.wikipedia.org/wiki/SDRAM

(Anything you see on a Wikipedia page that is in blue, is a link to more information.

To further illustrate this,

2) http://en.wikipedia.org/wiki/DDR_SDRAM )

SDR Sdram specifications were all over the place. What was considered to be a standard for one manufacturer, differed for another manufacturer.

The JEDEC organization was formed.
JEDEC sets the standards for ram memory from DDR Sdram on up.

Voltage for DDR Sdram is 2.5 volts
DDR2 is 1.8 Volts
DDR3 is 1.5 Volts.

Ram manufacturers found that by upping the voltage requirement on high performance ram, the ram could perform, better.
Not true in all cases, as there is high performance ram that operates at the JEDEC standard.

Ram timings were also varied.
Also the chip configuration
Plus the density of the DRAM chip.

Unless it is a really cheap, generic ram module, (Stick), there will be a manufacturers code on the side.
With this code I can tell you the specifications of that ram module.
I can also explain

Feb 28, 2010 | Computers & Internet

2 Answers

My 2gb ram stick died, so I tried upgrade to 4gb


Most appreciated naturalgal66.
Perhaps you would like more information, to put together some of the information I stated in the Clarifications.

This is a motherboard block diagram,

http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg

This relates to the motherboard model you have. Motherboards used for the Intel Core i7 are of a different design, and technology.

CPU as you know stands for Central Processing Unit, or for short - Processor.

The Processor 'communicates' through the Front Side Bus, (FSB), to the Northbridge chip. (Think of the FSB as a 'Data Highway'. Communication goes back, and forth)

The Northbridge chip handles the Ram Memory, and the high speed graphics card slot. (If used on a particular motherboard) Since it handles a high speed graphics card slot, it only handles PCI-Express or AGP.
Not PCI.

The Northbridge chip communicates through the Internal Bus to the Southbridge chip.

The Southbridge chip handles the slower capabilities of the motherboard.
Some examples are:
1) PCI, and PCIe.
(PCIe is PCI Express. It is PCI Express, but relates to the slower PCI Express x1. Not the faster PCI Express x16 used for graphics)

2) Onboard Audio

3) SATA, LAN, and USB ports

4) Ethernet
And other devices.

As you can see the Southbridge chip controls the Onboard graphics, (Integrated graphics) through a PCI bus.
It also controls anything that is installed in a PCI slot.

If you have time someday, you may want to look up some of the hardware, and technology used in a personal computer.
A lot of information can be found on Wikipedia.
You may want to type in Wikipedia's search box,

1) Northbridge (computing)
2) Southbridge (computing)
3) Front Side Bus
4) Sdram, (This page will start you with SDR Sdram. Single Data Rate Sdram. Links are also listed in blue for info on DDR Sdram, DDR2 Sdram, DDR3 Sdram, and includes the new technology coming, DDR4 Sdram)
5) Harddrive
6) Integrated Drive Electronics, (IDE)
7) SATA
8) RAID
9) Comparison of Nvidia chipsets (Also Comparison of Nvidia graphics processing units
10) Comparison of AMD chipsets (Also Comparison of AMD graphics processing units, and also to include Comparison of ATI graphics processing units.
11) GPU
12) Clock generator (Did you know that a quartz crystal, is used as an oscillator for a Processor?)

Anything you see in blue is a link to more information about it.

{Interested in knowing what's inside a Harddrive, or do you already know?

http://computer.howstuffworks.com/hard-disk.htm

Jan 15, 2010 | HP Pavilion a6600f Desktop PC

1 Answer

What steps are needed to upgrade my memory. I have a etower667ir with ramsd64mpc. I want to install 2 128mb sdram dimm pc100. what do I need to do?


First download a system analyzer fromwww.belarc.com and use it to check what is the maximum Ram that it can accommodate. If it will take just make sure you-get Non-parity ram when you buy the sticks. please note that SDram is more expensive that DDRam, but cannot be substituted.

Jan 06, 2010 | E-Machines etower 667ir PC Desktop

1 Answer

How to jumpe SDRAM to DDRAM


according to my research- this mobo will support 2GB ddr400/333 sdram- 1GB in each slot. don't think it will support ddram. don't know if you can mix 400 and 333 bus speeds. probably can, but put 400 in slot 1. not sure ddram will even fit in ram slots!
good luck!

Sep 24, 2009 | EliteGroup nForce3-A Motherboard

1 Answer

Problem for ecs m810d


it's between ddram n sdram connector.

Apr 03, 2009 | PC Chips M810DLU (M810DLUV75C) Motherboard

1 Answer

Jetway MoBo: 2 x 1GB Samsung PC2100 appearing as just 1GB (2 X512MB)


Hi,

Your post indicating that you are moving up from SDRAM to DDRAM shows that your motherboard is capable of either type (having both type of slots) and therefore would have been a few years old. Having said this, then your MB would have the very early version/compatibility of DDRAMs where/when 512 then was the highest readily available memory.

As most Taiwan manufacturers, Jetway would be publishing specs that are a bit just over rated in terms of their product performance unlike Asus, ABit, AOpen. Additionally, most have been known to be using the same manual for several versions of the motherboard. A similar looking motherboard can come in several versions such as those with internal video while another is an AGP slot; one versions may or may not have built-in Ethernet port. In the same token, a version may have 2 X SDRAM slots + 2 DDRAM slots or 4 X SDRAMs or 4 X DDRAMs. Again, we are talking of the same model number of the motherboard but different versions/revisions.

2 G would be right for the 4 X memory slots versions (at 4 X 512) but since you have the 2 + 2 (2 SDRAM + 2 DDRAM), maximum would only be 1 Gb (2 X 512).

Hope this be of additional help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jul 03, 2008 | Jetway V266B Motherboard

1 Answer

Giga pro motherboard


Replace the power supply with one that you know is good, see if that helps. If not comment back and I will continue to search for solutions.

May 09, 2008 | Intel SCB2SCSI Motherboard

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