T2742 Desktop eMacine I want to upgrade the RAM from 256 MB to 1 GB. Can I replace the single 256 MB memory board with a single 1 GB memory board? Or, should I use two 512 MB memory boards?

Yes you can.
For 512 Mb RAM you can use a single 512 Mb memory module or two 256 Mb memory modules.
For 1 Gb RAM you can use a single 1 Gb memory module or two 512 Mb memory modules.

Hi this model sopport 2Gig Memory Ram.


RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM
Installed RAM 512 MB
Max Supported RAM 2 GB
Number of Memory Slots 2 x DIMMs
Supported RAM Speeds 400 MHz • 333 MHz
Installed Cache Memory 256 KB

Please check in to your Bios system maybe share memory Video or capacity is setting

You need the EXACT speed rated RAM.
Your support page states it needs.....
400-MHz DDR2 SDRAM
NOTE: Your computer supports only registered memory

Memory capacities
256-MB, 512-MB, 1-GB, 2-GB, and 4-GB ECC

256-MB, 512-MB, 1-GB, 2-GB, and 4-GB ECC modules to a max of 16GB
more info here
http://support.dell.com/support/edocs/systems/ws470/en/ug_en/about.htm

the RAM upgrade will depend on ur motherboard capacity and specification.
u need to check ur MB manual
if ur MB can have only SD RAM then only SD RAM upgrade is possible...DDR will not work....
so be careful while buying ur RAM

intelD845GLLy MB...the following details are from the intel website

http://www.intel.com/support/motherboards/desktop/d845glly/sb/CS-012825.htm

System Memory Features
The D845GLLY board provide the following memory features:

• Two DIMM sockets supporting 3.3 V (only) 168-pin 133 MHz Single Data Rate (SDR) SDRAM DIMMs with gold-plated contacts
• Unbuffered non-ECC DIMMs only
• Maximum total system memory: 2 GB; minimum total system memory: 64 MB
• Serial Presence Detect (SPD) DIMMs only
• Suspend to RAM

Caution Do not use ECC DIMMs with the Desktop Board. Using ECC DIMMs could damage the Desktop Board.
Integrator's Notes:

• Registered DIMMs are not supported on the Desktop Board.
• This Desktop Board has been designed to support DIMMs based on 512 Mbit technology for a maximum onboard capacity of up to 2 GB, but this technology has not been validated on this board.

Note To be fully compliant with all applicable PCI33 SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows the BIOS to read the SPD data and program the chipset to accurately configure memory settings for optimum performance.
hope this helps
Reg....bye

Hi,

it is not complicated for upgrade the desktop.as per my knowledge ur system configuration is-

Key Features
Form Factor Mini Tower
Processor Intel Pentium 4 1.6 GHz
Installed Memory 256 MB (SDRAM)
Operating System Microsoft Windows XP Home Edition
Recommended Use Business

ur system processor and memory both will be upgrade.
 
Memory-
RAM Technology SDRAM
Installed RAM -256 MB 
Max Supported RAM 3 GB
Installed Video Memory 32 MB

Processor-
Processor Type Intel Pentium 4
Processor Speed 1.6 GHz
Processor Manufacturer Intel
Processor Upgradability Upgradable

Audio / Video-
Audio Output Type Sound Card
Max. Video Resolution 1920 x 1440

Hard Drive-
Hard Drive Capacity 40 GB
Hard Drive Interface DMA/ATA-100 (Ultra)

Thanks,

Make sure you have the memory installed correctly. Those beep codes identify it as bad memory. Try the old RAM.
Good luck with this.

frquance is not set and it is not recommand that 2 different friquance ram is not working propaties

The motherboard you mentioned supports DDR1 RAM.

For windows xp and general application 512 MB is enough.
But if you use memory intensive applications like image/video editing then you can opt for 1-2 GB RAM.

You may have incompatible memory. double check your order and use only recomended name brand memory such as Kingston, you can look up the correct memory on their website, or on newegg.com

u can use 1 gb 400mhz DDR ram,single or 2