Does anyone have any suggestions on whether following RAMs are compatible to
each other? Therefore, I can install both on the same computer.

My current PC is using following RAM, and I would like to add addition one.
NT256T64UH4A0FY-37B
256MB 1R X 16
PC2-4200U-444-10-C1

The following RAM is shown as below, does anyone have any suggestions
whether following RAM is compatible to above one?
V826632K24SATG-C0
256MB DDR-333MHz-CL2.5
PC2700U-2533-0-A0

Thanks in advance for any suggestions
Eric