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Notes, diagram on frequency modulation - PC Desktops

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  • pklinuxguru
    pklinuxguru May 11, 2010

    Please clarify what you want. Do you have documents you can't open or modify? Lotus Notes? What does "frequency modulation" have to do with your problem?

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Type in "Diagrams on frequency modulation" into google search. and you will get many hits like the one below: 
http://www.music.mcgill.ca/~gary/307/week8/node14.html

Posted on Jan 30, 2009

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Tip

Ram upgrades


This is a tip explaining exactly what you should keep in mind when you want to upgrade your ram modules in your Desktop computer. This will also act as a guide which will give you step by step instructions on how to replace the ram module.

Firstly, before we start buying, we need to be sure that the upgraded ram modules are compatible with your motherboard. Here are a couple of tips you need to keep in mind.



Frequency:

You need to have a look at the frequency of the ram you are using at the moment, as well as the supported frequency of your motherboard. If your motherboard is compatible with a higher ram frequency than your current ram, you can use the frequency which the motherboard stated as maximum for optimum performance. Remember, if yu want to add ram modules, all ram will be downgraded to the ram with the lowest frequency.

Ram model:

You need to know if you are using DDR, DDR1, DDR2, DDR3 ram, some motherboards supports both DDR2 and DDR3. If your motherboard does not support a certain model, it will not fit in the slot on the motherboard, hence, it will be useless. Thus, you need to have a look at the ram model supported by your motherboard.

Latency:

Lastly, you need to have a look at the latency of the ram. The lower the latency, the better the performance.

After you have bought the new upgraded ram modules, we can install them. The following steps will guide you through the installation process.

Step 1

Shut down your computer and unplug all cables. Also, you need to take of the side panel of your computer. Remember to stay grounded at all times when you start working with the hardware of your computer.

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Step 2

The second step will be to either take out the current ram modules to upgrade them, or insert the new ram modules into the other available ram slots on the motherboard. Remember to keep yourself grounded at all times while touching the any of the computer hardware. Also, handle the ram at the length end at all times, not at the width end. There will be 2 small hinges on both sides at the base of each ram modules end. You need to pivot the outwards before the ram module can be removed or inserted.

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Step 3

The last step will be to screw back the side panel after you have inserted the ram modules(Be sure that you remember to clip back the hinges to ensure that the ram module is places in correctly. Never force the module, line up the ram module with the slot on the motherboard.) Also, plug back all cables into the Computer case, and enjoy your handwork.

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At the links below you will be able to have a look at sme competative prices on ram modules.

http://www.crucial.com/
http://www.kingston.com/ukroot/
http://www.upgradecomputermemory.com/
http://www.memory-up.com/Memory/GatewayPerformance.html?gclid=CJesovOPiaACFaFi4wodjBrVkQ

Please let me know if you have found this to be helpful.

Kind regards
Andrea

on Feb 23, 2010 | PC Desktops

1 Answer

I want to upgrade memory of my motherboard PI865 d7 V2


Hello there;
Good day to you..
The best way to have an upgrade is to determine first the kind of memory module you have. You can look into your motherboard for any markings relating to memory module frequency such as DDR or DDR2 and so on..
Have a nice day!

Mar 31, 2011 | PC Desktops

1 Answer

Is there anything you need to do before or after upgrading your memory card in an hp laptop


If this in reference to the Ram Memory module/s, the answer is No.

Things to know about upgrading Ram Memory in a computer.
A) What is the Maximum TOTAL Amount for the computer. (Motherboard)
B) What is the Maximum Amount for EACH ram slot.
C) What Type of Ram Memory does the computer support. (Motherboard)
D) What frequency rate of Ram Memory does the computer support. (Slang for Frequency Rate is 'Speed')

If you have the correct Ram Memory, and are only installing 1 Ram Memory module, be sure to install it in Slot 1. (Also referred to as DIMM 1)

This is the Ram Memory slot the Processor reads first.

If I knew what HP laptop computer this was, such as the Product Number, and I knew what Ram Memory you are installing, I could help you further.

On the bottom of the laptop is a white Service Tag.
P/N = Product Number
(S/N = Serial Number. Do Not give this out online, except to HP Support)

If your problem does not regard Ram Memory, please disregard this solution.

Oct 06, 2010 | PC Desktops

3 Answers

How to add 1GB memory


First you need to find out what Memory ( Ram ) it requires as there is DDR DDR2 SODIMM but seeing as it is a newish computer it could be a DDR2. Way to find out is looking up on the internet. Unplug everything from the computer , then look on the back. With the computer front facing you remove the 2 screws on the left side and then pull the side panel back and away from the tower. Look inside and you will see a silver box with a fan on it ( thats the Chip fan ) and next to it you should see some Sticks that are green and have black squares on them, what you do is note what slot is free and make sure you grab the new stick on each corner and push it down onto the free slot ( as long as the 2 tabs either side of the socket are pulled away, then it will jsut clip into place with a little pressure.

Thats a Ram change, but make sure you know what type it is.

Aug 22, 2010 | Sony VAIO RC110G (VGC-RC110G) PC Desktop

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 | PC Desktops

1 Answer

I upgraded my T5052 to 2GB, max that the PC can take it, but system recognizes only 1 GB, with each chip. What i should do to fix that.? Thank you Chris


Firstly ensure all the RAM modules are working, for this you need to insert one module at a time and test the system, if all the modules are working individually
you can try inserting all the RAM modules within the slots, swap the modules and check, if this dos'nt work probable reason the two RAM modules are not compatible with each other, may be they have in-compatible frequency's

Oct 05, 2009 | eMachines T5052 PC Desktop

2 Answers

I have a 838gm gateway,Ive tried to install 4gb of ram ,when I install more than 2gb,it will not boot


Gateway's website says this motherboard will support 4GB of DDR333 or DDR400 memory. I would suggest testing each memory modules by plugging it into the board by itself, then rebooting. This way you can catch a bad DIMM that might be causing problems. If each one checks out then start adding one module at a time, rebooting after each one. If it still stops booting after you add a module, you probably have a bad system board, and only now that you are adding the extra memory are you finding that out. If that is the case, try contacting Gateway support. Maybe they would be kind enough to cover repair under warranty.

Nov 27, 2008 | PC Desktops

1 Answer

Few questions about RAM memory?


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......
    

    
                                         

Sep 24, 2008 | Compaq Presario SR1120NX 2.66GHZ Tower w/...

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