Question about Compaq Presario SR1120NX 2.66GHZ Tower w/ CD-RW (2018267632) PC Desktop

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Few questions about RAM memory?

What is the difference between high density and low densty RAM?
2) How can i check speed of computer when i incresed RAM? can i use CPU-Z for this. Does high DRAM frequency means more faster speed?
3) My computer has one 4 slots each can go with 1 GB PC3200 RAM with maximum capacity of 4 GB. My computer has 2 slots in black color and 2 slots in black color. What is the difference between these 2 colors slots.
4) Are 1 sided RAM is compatible with 2 Sided or double density RAM or if i rephrase does 8chip PC3200 DDR400 is compatible with 16chips PC3200 DDR400

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Solution:



i)  LOW DENSITY modules have 100% compatiility with ALL systems and ALL chipsets.
    HIGH DENSITY modules only have 10% compatibility

    here compatablity means LOW DENSITY RAM are accepted by all system(100%)  or any make           system.. HIGH DENSITY RAM are accepted by 10% by only some system or computers...


ii) in order to check system performance or amount of Computer RAM usage press the ctrl+alt+del
   simultaneously a new window(window task manager) will appear showing:

    CPU usage: showing the amount of CPU or processor utilized at that particular time.
    PF usage: showing the amount of RAM memory utilized at that particular time.
    Physical Memory: showing Total RAM Memory, Available Ram memory....

iii) baiscally they are two types of RAM they are:

    DDR1:which is older one supported by older system  or older mother boards which is costlier
    DDR2: which is latest one supported by all new system or new mother boards which is less                         costlier

    DDR: double data rated ram......which will send data at a double rate compared to SD RAM

iii) here color doesnt matter, these slots either support DDR1 or DDR2 but not both at a time
    
    DDR1 has 184 pins or gold plated pinssss... on the edge of the RAM
    DDR2 has 240 pins 

    so difference doesnot allow DDR2 to placed in DDR1 motherboards or vice versa...

iv) it does have anything to do with no of chips on the RAM but they only differ whether it is DDR1 OR DDR 2(DDR2 are much faster than DDR1)

NOTE: whatever may the the RAM, each RAM has FSB(called Frequency...) which determines the frequency of rate at which data is tranferred from RAM to processor(CPU)  usually in MHZ such as FSB 300, 400, 200 , 333...................

more the FSB the faster data is transferred to the processor(CPU)

dont worry even RAM with less FSB's work well with the processor....having 1 GB RAM or 2 GB RAM is engouh, it only matters with the speed of CPU ... but not RAM......
    

    
                                         

Posted on Dec 28, 2008

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Pc ddr memory what is the difference between high density and low density


you need to check with board to fine what ram works with first.i use what they say to use so no problems later and save money as well ok jim

Nov 25, 2011 | Computers & Internet

1 Answer

Hi, I don't know if I should get single or double sided ram for this mother board, and is low density ram ok? Thanks, Wayne


This mainboard uses DDR400 memory


A High Density module is by far much slower than Low Density module at the same speed rating say PC3200/DDR400. High density modules are FAR CHEAPER, less than half the price when compare with low density modules and hence high density modules will NOT work on 90% of today's PC chipsets. LOW DENSITY modules have 100% compatibility with ALL systems and ALL chipsets. HIGH DENSITY modules only have 10% compatibility and are VERY SLOW.


So AVOID those 'High-Density - 128Mx4 config 1GB modules which is usually UNBRANDED and is NO NAME!


With this in mind it is far better to use low density Ram. Most RAM cards today are double sided, it all depends on the capacity of the RAM card.


Please rate this solloution as it it much appreciated.

Thanks.

Oct 31, 2010 | Gigabyte GA-8S661FXM-775 MATX MBD SIS661FX...

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

RAM compatibilty


No, DDR 400 will not work. The best thing you can do is call Dell and give them your information. Model number and that kind of information and let them tell you what kind of ram you need. If you put the wrong type of ram in your machine it could cause major damage. There are so many different kinds of memory out there, not to mention high and low denisity. Your machine may use PC2700 high density and if you try to use PC2700 low density it will not work. One other thing that you can try is uninstall a stick of your ram and write down everything on the stickers and then go to some place like kingston memory and use their memory locator to find what you need.

Dec 01, 2009 | Dell Dimension 2400 PC Desktop

1 Answer

Planning to upgrade my RAM(motherboard K7SOM + V7.5C). Ram have high & low density. What is the difference? Which suit my motherboard? Thanks.


Look at the sticks of RAM -- "high" density means fewer chips on each side of the stick, i.e., newer technology and production methods have packed more bits into each chip, while "low" density usually means 8 chips/side, using older RAM chips.

Older motherboards do not expect to find "high" density RAM, and typically will only detect 1/4 or 1/2 of the RAM on the stick.

If you buy a new motherboard, it will support BOTH densities.

Oct 22, 2009 | EliteGroup K7SOM (K7SOM W/CPU) Motherboard

2 Answers

Update failed


You need the low density ram and not high density. Unfortunately the low density stuff is rather more expensive then the high density so you're best trying to get some second hand - ebay maybe? I think the cpx only accepts pc100 even though the crucial site recommends PC133. Hope this helps.

Sep 28, 2009 | Dell Latitude CPX Notebook

1 Answer

Not getting full 2 gb ram from 2 x 1 gb cards


Do you have onboard video on this computer? If it has integrated video on the motherboard, the motherboard will be stealing (sharing) a small bit of your MEMORY for it's own use. This is normal with integrated video..
If you have a video card in and expansion slot with it's OWN memory on the card , then it will not use the systems' memory.
I would choose low density for compatibility with the widest range of computers.

Apr 06, 2009 | Computers & Internet

2 Answers

How do I determine what kind of memory that I need?


Go to Crucial.com and install their configuration utility through your browser. They will tell you what you have and all the combinations you can do to max out your system. Look at the specs of the RAM and you can get it from Crucial or some other vendor.

Dec 30, 2008 | Computers & Internet

1 Answer

My laptop has 256K memory installed. I purchased 512 RAM (max I can add is 1024) and installed it in my hp Pavilion zt1230 laptop. Per Kahlon.com instructions, I cleaned gold leads with eraser and popped...


Is it a High Density memory? There are two different types of memory, High and Low. Low density is the universal but High density, may be cheaper but the motherboard needs to be compatible with High density memory. Although your memory fits in the slot, I think you have High density memory hence why it won't boot up and does when you remove the memory.

Dec 06, 2008 | Computers & Internet

4 Answers

Low or high density ram or both?


Hi Chrisina,

Yes you have made an error in your purchase. Download a free memory checker here:http://www.crucial.com/store/drammemory.aspx to discover what memory you can install in your PC.

Good Luck,

Allan

ajb2000

Dec 27, 2007 | ASUS P4VP-MX Motherboard

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