"Gaurav" wrote in message
oups.com...
Dear all,

My desktop configuration is WinXp Professional -P4--1.70Ghz--256MB
SDRAM PC133 --40GB Harddisk.MotherBoard make is "Mercury"

Now i want to upgrade my ram upto 512MB.

On motherboard there are 4 Slot for Ram.

2 is for SDRAM & 1 is for DDR1 & 1 is for DDR2.

2-128MB SDRAM PC133 is mounted on motherboard,

For upgrading RAM when i am mounting 256MB PC2100-DDR RAM on
Motherboard.OS is not detecting PC2100 RAM. I am connecting this on
DDR1 or even in DDR2 but in both slot it is not detected by Operating
system.

should i have to change any jumper setting on motherboard.
If someone want's any more information about hardware.let me inform.

plz help me on this regards.

with warm regards.

gaurav


You can't mix ram types. Well, you can, but not in different -slot- types.
You have to use DDR and nothing else, or SDRAM and nothing else. If your
motherboard will support it, you can ditch your SDRAM and just run one stick
of 512MB DDR. -Dave