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ATTEMPTING TO UPGRADE THE 256MB RAM ON MY EMACHINE 540 I PURCHASED A NEW PC133 256MB RAM.AFTER INSTALLING IT THE MACHINE STILL WORKED OK BUT STILL ONLY HAD 256MB RAM NOT 512MB. BOTH OLD & NEW CHIPS WORK WHEN SLOTTED INDIVIDUALLY INTO EITHER AVAILABLE SLOT.ALSO ALL COMBINATIONS USING BOTH CHIPS ALLOW THE MACHINE TO WORK BUT STIIL ONLY 256MB.CAN YOU SUGGEST WHAT STEPS ARE AVAILABLE TO NOW PLEASE. THANKS

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Bro, kindly specify your OS and what type is it? Is it 32 or 64. The type will determine the amount of RAM it will only read.

Posted on Nov 06, 2008

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Types of sdram


PC66 SDRAM
PC66 SDRAM is the original module speed of SDRAM. PC66 SDRAM was the earliest version of SDRAM and therefore came in a number of smaller megabyte sizes than later versions. Most early motherboards were rated for PC66 SDRAM. The available sizes are 32MB (megabytes), 64MB and 128MB.
PC100 SDRAM


PC100 SDRAM was released after PC66 SDRAM and runs at a higher speed. It has the same number of pins as the earlier memory module and is capable of utilizing the same RAM slot. The only difference when installing this SDRAM in compatible computers with older systems (PC66 slots) is that the SDRAM will run at a slower speed. PC100 RAM comes in sizes such as 32MB, 64MB, 128MB, 256MB and 512MB.
PC133 SDRAM

The last generation of SDRAM is PC133. The PC133 memory provided a speed upgrade and comes in larger sizes than previous generations of SDRAM. PC133 modules are backward compatible with older SDRAM slots. The PC133 memory, however, will be forced to run at the slot's slower bus speed (PC66 or PC100). The memory comes in sizes like 128MB, 256MB, 512MB and 1024MB.


Mar 03, 2011 | Computers & Internet

3 Answers

I need to know how much ram my motherboard will be able to run without burning up? I have an Emachines t1090 w/ Windows XP, 900MHz Intel Celeron Processor, 128MB SDRAM, CD-ROM 48x Max. CD-Drive, 20GB Hard...


The max for your system is 512MB. You have two memory slots and one has a 128MB chip so if you want 512MB, you need two 256MB chips and throw away the 128MB.
At Newegg, a 256MB chip is $42+ shipping of $1. I'd consider getting a new computer instead.
I don't think memory upgrade will tax your system cooling.

Sep 09, 2010 | E-Machines T1090 PC Desktop

1 Answer

Installing a 512mb PC133 memory module in a t1090 emachine. The pc wont recognize the module and wont boot nor go into post. Switching back to the original two 128mb modules and the pc works normal. Is...


Hi there
Your t1090 will only accept a maximum chip size of 256Mb and so it will not accept the added the 512mb chip as it cannot handle it. 512 is the maximum size of RAM for this machine but unfortunately you cant put it in in one go

Jul 03, 2010 | E-Machines T1090 PC Desktop

1 Answer

I need to upgrade the ram in my Ms-6312 ver1 motherboard i need to know what the best ram and what will work i need atleast 2 gb


I have the same board. You can only install 256MB of PC100 RAM in each slot, for a total of 512MB. PC133 RAM will work as well, but it will run at PC100 speed.

Feb 25, 2010 | Gateway MS-6312 (4000785) Motherboard

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

The memory I install to Armada wont boot


You CAN NOT mix 100 and 133 chips! It is not good for the computer. They may let the computer work, but it won't recognize them properly.
If you still want to use the new chips, try and bypass the acklowledgment. Don't know if it is possible, but it may be the only way.
You should be using the correct chips.

You can go to: 4allmemory.com or cruicial.com to find out what sizes your computer is allowed.

Jun 01, 2009 | Compaq Armada E500 Notebook

1 Answer

Memory upgrade


First step : Make sure the memory you purchased meets the following specifications

"168pin PC133 SDRAM DIMM" which should be easily accessible from wherever you bought it.

If not, then you can find memory here. that the company guarentee's will work with your system. Also - You want to make sure the memory that was in your system to begin with is identical to the memory you are sticking in it to get it to 512MB Systems that are this old with "PC133 SDRAM" are very picky about what kind of ram you stick in them. Make sure wherever you purchase your memory from, has a guarentee that it will work in the make/model of your computer.

Mar 14, 2009 | Compaq Presario 5000 PC Desktop

1 Answer

RAM uprgade doesn't work on Toshiba SP6000


Hi

You need these modules:
PC133 512MB (PA3108U-1M51)
PC133 256MB (PA3086U-1M25)
PC133 128MB (PA3085U-1M12)

Furthermore you can upgrade the memory to max 1024 MB

hope this helps

Leecom72

Nov 13, 2008 | Toshiba Satellite Pro 6000 Notebook

2 Answers

IBM ThinkPad T22 Series (Type 2647)


Since this is an older machine, the performance can't be boosted very much. The maximum performance you can get from this machine is 1ghz processor, with 512mb RAM. The 1ghz processor is the biggest processor that is compatible, and unfortunately, the system is base on a 100mhz frequency rating, so PC100 memory is the only compatible memory available. The maximum chip size in PC100 is 256mb, they just don't make them any bigger, so 2x256mb=512mb RAM. As far as the hard drive, it is an IDE drive, and you can get an IDE drive up to 120gb. These are very good and durable machines, just slow, so if you can deal with the lower level of performance, this machine will last years. Also, these are upgradeable to XP pro, but not Vista.

Sep 04, 2008 | IBM ThinkPad T22 2647 Notebook

1 Answer

RAM upgrade presario 7594


How many memory did you install ? You should insert the memory to the primary slot. You shoould remove the old one and replace it by a new one.

May this site will help you: http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph03886&lc=en&cc=us&dlc=en&product=94524&lang=en#N822

thank you . Please leave comment b4 u rate, thanks, melnavz

Jan 30, 2008 | Compaq Presario 7594 PC Desktop

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