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Is there a difference between a DDR2 SDRAM and a DDR SDRAM? Are they the same volts 2.5?

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Http://en.wikipedia.org/wiki/DDR2_SDRAM

Posted on Jul 29, 2009

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2 Answers

Ddr ram sdram


If you mean you want to replace DDR RAM with DDR2 or DDR3 RAM, that is impossible. MBs are designed for one type and the sockets themselves are keyed differently and use different voltages.

Nov 08, 2013 | Intel D915GAV Motherboard

1 Answer

Three things to consider when choosing memory


1) What is the Maximum TOTAL Amount, that the motherboard will support.

2) What is the Maximum Amount for EACH ram memory slot.

3) What type of Ram Memory is it?


A) What type is it?

Single-Data Rate SDRAM?
SDR Sdram which is erroneously just referred to as SDRAM.

Double-Data Rate SDRAM? DDR Sdram
Double-Data Rate 2 SDRAM? DDR2 Sdram
Double-Data Rate 3 SDRAM? DDR2 Sdram

(See? They are ALL ->
Synchronous Dynamic Random Access Memory)

Then you get down to the basics, that is really supposed to be known...........

B) What Frequency Rate does it operate at? ('Speed')
200MegaHertz? 266MHz? 333MHz? 400MHz? 533MHz? 667MHz?
800MHz? 1066MHz? 1333MHz?

C) What Voltage does it use?
JEDEC has set the standard for Ram Memory.
'High performance' ram memory may use higher voltage.

Example;
DDR Sdram
JEDEC has set the voltage standard for DDR Sdram at 2.5 Volts (DC)
That is what the factory has set as a default voltage, in BIOS Setup.
High performance ram memory? May be 2.6 volts, or 2.7 volts.

D) Ram Timings;
Shorter to explain this way,

http://computer.howstuffworks.com/ram.htm

http://www.hardwaresecrets.com/article/Understanding-RAM-Timings/26

http://en.wikipedia.org/wiki/SDRAM_latency

E) Whether or not ECC or Non-ECC is to be used,

http://en.wikipedia.org/wiki/ECC_memory

ECC ram memory is generally used in a Server computer.
The data (Information) is analyzed 2 to 3 times, before it goes through.

F) Buffered or Unbuffered ram memory:

http://en.wikipedia.org/wiki/Buffered_memory#Buffered_memory

G) Chip Configuration:

The black rectangle chips on the side/s of the ram memory module ('Stick'), are called DRAM chips.

They are arranged in an order, and connected via circuitry, to be accessed as the ram memory manufacturer has deemed.

This you shouldn't have to worry about.
In fact you can probably get away without knowing D) also.

What test is this for?

Post back in a Comment

Regards,
joecoolvette

Apr 17, 2013 | Computers & Internet

1 Answer

Can i use DDR2 RAM instead of DDR1


YES, if your motherboard accepts DDR Sdram, and DDR2 Sdram ram memory. If your motherboard has both types of ram memory slots.

BUT, you can ONLY use DDR Sdram, OR, DDR2 Sdram.

You Cannot use both types of ram memory in the motherboard, at the same time.
(BIOS will only recognize one type at a time)


NO, if your motherboard does not have ram slots for both DDR Sdram, and DDR2 Sdram ram memory.

Double Data Rate Sdram ram memory modules, have 184 gold plated contact pins on the bottom.
92 on Each side,

http://en.wikipedia.org/wiki/File:Generic_DDR_Memory_%28Xytram%29.jpg

(You can click on the above photo to enlarge)

DDR2 Sdram ram memory modules have 240 contact pins.
120 on Each side.

Sep 04, 2010 | HP Computers & Internet

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

1 Answer

Can i upgrade my ram to ddr3 if so what would you recomend .cheers


Thank you for the clarification sir.
NO, the Fujitsu Scalio 600 Media Center uses the Gigabyte GA-8ISXT-FS motherboard, and it only supports DDR Sdram.

This is a PDF Motherboard Manual for the GA-8ISXT-FS mobo, from Fujitsu Support,

http://uk.ts.fujitsu.com/rl/servicesupport/techsupport/Boards/Motherboards/GigaByte/ga-8isxt/Man_8isxt-fs_uk.pdf

This is the support page for the Fujitsu Scalio 600 Media Center,
from Fujitsu Support,

http://uk.ts.fujitsu.com/rl/servicesupport/techsupport/consumer/MediaCenter/Scaleo%20600/Scaleo%20600.htm

Uses either DDR Sdram at 333MegaHertz, or 400MHz.
(PC2700 and PC3200 respectively)

DDR Sdram has 184 gold plated contact pins on the bottom.
DDR2 Sdram has 240 gold plated contact pins on the bottom.
DDR3 Sdram has the same amount of contact pins as DDR2.

The voltage and signal contact pins are in a different place, from DDR2 to DDR3.
This is why the locating notch on the bottom of the ram stick, is in a different place, comparing DDR2 to DDR3.

So you can see, DDR3 not fit in a DDR2 slot, because the locating lug in the bottom of the ram slot, and the locating notch in the bottom of the ram stick. Keeps people from trying to put DDR3 in a DDR2 slot, and vice-versa.

You can also see why a 240 pin ram stick, will not fit in a 184 pin ram slot.

Bumping up from DDR to DDR2 does make a difference in my book. (Requires using a motherboard that supports DDR2 however, so you would need a different motherboard)

Going from DDR2 to DDR3? Not so much IMHO. The frequency rate is higher, but there is a trade off with slower ram timings.

Sorry if I have been too 'Windy', but I thought I would give you more information, than just,
'No, won't work', or No won't work because your motherboard uses DDR Sdram'.

Nov 18, 2009 | Televison & Video

2 Answers

Can i use DDR 2 RAM for U8668d ver. 6.1 motherboard of 1GB


your motherboard uses DDR1 SDRAM PC2100 max. as stated on their website:
http://www.biostar-usa.com/mbdetails.asp?model=u8668+d
you cannont put DDR2, but you can expand up to 2GB

Hope this helps
Alex
www.CAS411.com

Mar 17, 2009 | Biostar U8668D (802700113338) Motherboard

1 Answer

Abt ram


101GGC:
boxbullet_gray.gif Two DDR SDRAM Dual Inline Memory Module (DIMM) sockets boxbullet_gray.gif Support for DDR 400 MHz and DDR 333 MHz DIMMs boxbullet_gray.gif Support for up to 2 GB of system memory

102GGC:
Support for DDR2 533MHz and DDR2 400MHz DIMMs
Support for up to 2GB of system memory

Mar 10, 2009 | Intel D101GGC Motherboard

1 Answer

Ddr and ddr dimm


To answer you there is no difference

DIMM= Dual In Line Memory Modual 64 bit transfer
Dimms replaced Simms when pentium ll came out.

DDR= Double Data Rate
Newer memory modules are DDR2 or DDR3
Older systems are DDR or SDRAM

All the systems use SDRAM DIMMS, DDR DIMMS,DDR2 DIMMS, DDR3 DIMMS.

Apr 17, 2008 | Computers & Internet

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

Mar 21, 2008 | Foxconn P4M800P7MA-RS2 Motherboard

3 Answers

ECS M925 1.0 sdramm to ddr memory


The normal DDR Ram is supported..It doesn't support DDR2..

Nov 03, 2007 | PC Chips (M925G) Motherboard

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