I am owning a AMD Sempron 2400+ desktop.which is having DD ram of 608mb.in 2 slots.( one 512mb and the other 128mb ).When I looked at the board, there are 2 slots only indicating DDR! &DDR2. Now I want to upgrade the RAM up to 2GB.Now iam confused whether to purchase DDR1 or DDR2. Please help me with part name

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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.

I assume that you've booted the computer with _ONLY_ the 512MB stick installed, and that the computer recognized it (reporting either 512MB or 384MB), i.e., the 512MB RAM is not "defective".

Hmm. 1024 minus 896 is 128.
So, the "integrated-into-the-motherboard" video-card is "stealing" 128MB of your RAM, to be used strictly for "video" purposes, leaving 896MB for Windows to use.

Now, about the "missing" 512MB of RAM.

1. If you have four slots for RAM, and they are physically arranged into two pairs of two slots, rather than four equally-spaced slots, your motherboard is capable of "dual-channel" mode. But, since your two sticks of RAM are not "matched" (size, speed), you _MUST_ insert both sticks into _ADJACENT_ slots (not slots 1/3, nor slots 2/4), in order to run your RAM in "single-channel" mode.

2. If you have two slots for RAM, interchange the two sticks, to see if that makes a difference.

Here you go....
CPU Support

• Socket 939
• Support AMD Sempron, Athlon 64 and Athlon 64FX processors.
• Support 800 and 1000Mhz HyperTransport (HT) interface speeds.

System Memory

• Four 184-pin DDR SDRAM DIMM sockets.
• Serial Presence Detect
• Support for single-sided or double-sided DIMMs (DDR 333 / DDR400)
• Support for up to 4 GB system memory
• Asynchronous HyperTransport and memory controller interface speeds
• Supports dynamic link width and frequency change
• Non-ECC RAM (ECC memory will run in non-ECC mode)
• Single and dual channel mode operation:
  • Single channel mode with single DIMM, non-symmetrical population or non-identical DIMMs
  • Dual channel mode with 2 or 4 identical DIMMs, populated symmetrically

Good luck!

Sirwriter

if u have 4 ram slots check they are in the right slot'my old dell ram slots were 1.3.2.4.no you need ddr2 ram .yours are probably standard ram or u dont have daul channel ram slots.

2 x 184-pin DDR DIMM socket support up to 2 GB
recommended: 1GB x 2 DDR 333

http://www.svbinternational.com/motherboards/motherboard_845_chipset.htm

contact ur system admin/vendor for more details....

go to tiger direct and search

Hi,

There are 2 possibilities here - either the slot is not working or the RAM itself.

First install the working 128MB RAM in both memory slots one after the other and ensure that both the slots are in good shape.

Next, install the other 128MB RAM in one slot and check if this is working good.

Your laptop can support a maximum memory of 512MB. If you looking for an upgrade, please call Dell Support. Even though it's little expensive and shipping takes a week, you can get a free after sales service and peace of mind. Moreover you get proper guidance from the experts.

Your motherboard is actually a Foxconn 651M03.

According to your system you have :
512MB DDR333 PC2700 Non-ECC Memory (512MB x 1)
(One stick of 512MB)

The motherboard manual says this:
System Memory
Two 184-pin DDR DIMM slots
Supports PC1600/PC2100/PC2700 memory
Supports 64Mb/128Mb/256Mb/512Mb technology up to 2GB
(This means you can have a total of up to 2 Gigabytes of RAM)

If you upgrade your RAM, you will need to make sure that you get the correct type.

If you want to keep the RAM you have, you will only be able to have 1.5 GB of RAM because you only have two slots to work with. If you want to upgrade to the full 2 GB, you will need to buy 2, 1 GB sticks.

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