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Re: memory upgrade from 512 to 1,024 problem
Well, it seems that both RAM sockets worked previously with the 256MB DIMMs; remove the 512MB DIMMs, and install the two 256MB DIMMs again, then boot the system to see if both of the smaller DIMMs are recognized. If BOTH are recognized, then one of the 512MB DIMMs is defective; test each one individually to see which one is not working.
If only ONE of the 256MB DIMMs is recognized, then you might have a small piece of dirt or debris in one of the DIMM sockets; it is also possible (though not as likely) that one of the DIMM sockets has recently become damaged while you were changing the DIMMs...
Shut the system down, REMOVE THE BATTERY AND POWER CORD, then examine each DIMM socket to see if you can find any dirt or debris blocking the DIMM from making proper contact in the DIMM socket. Also be sure to check the DIMMs for damage, or the presence of a foreign substance on the gold contacts. You can use a pencil eraser to GENTLY clean the gold contacts on the DIMMs; this will help to remove any light surface oxidation that could be causing this type of problem.
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Hi, You can have a maximum of 2GB in that laptop 1x1GB in each slot, the ram speed is PC3200, PC5300 is too fast so the bios will not recognize it as the maximum is only 400MHz, stick to the PC3200 for each stick. Ask for SODIMM DD2 SDRAM, PC3200 2x1GB, i also recommend Kingston as the ram manufacturer.
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.
Are you finding these number when you go into your bios or from a program such as CPU-Z? If you are using good quality DDR400 memory, it should be posting with the full amount of memory available. You are using the correct slots to get dual channel, but you may want to try slots 1 & 2 or 3 & 4 to see if it will post with the full amount of memory as single channel. You may also want to have a friend try the memory in their computer to see how it posts, you may have some bad memory.
Verify on the label of the the memory Dimm that you installed that it is PC2700 SDRAM.
Memory Upgrade for Dell Inspiron 1200 Laptop, the Dell Inspiron 1200 Laptop takes the PC2700 DDR SDRAM SODIMMs. Memory Type, and comes installed with 256 MB (non-removable) of Memory. You can upgrade your Dell Inspiron 1200 Laptop to up to a maximum of 1280 MB Memory, the system has 1 socket to install Memory, already with 256 MB (non-removable) standard Memory installed. For best Laptop performance use the maximum amount of allowed Memory per slot for your Laptop. Standard Memory
256 MB (non-removable)
PC2700 DDR SDRAM SODIMMs.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it. Thanks, Joe
2nd.....Run Device manager to ascertain RAM installed
3rd.....Download Sandra Lite to find M/B specs.(Free Download)
4th.....Check if RAM is SODIMM,SDRAM,DDR,etc
5th.....Open PC case to ensure RAM slots available.
6th.....Purchase correct RAM.e.g.128MB->256MB,256MB->512MB,512MB->1024MB
Check to see if RAM slots are paired or not
Your motherboard supports 533MHz memory modules, no more. If you put anything higher in, it will work, but only at the speed of 533MHz, so there's not much point in aiming any higher.
Just make sure what you're buying is a DDR2 533MHz memory module, and it's best to get them in increments of 2.
If you have 4 slots on your motherboard, get another 2x512MB modules of RAM. If you're running Windows Vista, it might be worth considering 2x1GB modules.
I think that pretty much covers your question, if you have anything else to ask, feel free to reply.