I have 1 - 256 module & 1 - 512 MB module installed in my I9300
Yes. I have a Inspiron 9300. I purchased it with the 256 MB RAM module. I purchased an additional 512 MB RAM module and installed it for a total of 768 MB of memory.
1 - 256 module
1 - 512 module
PLEASE NOTE THAT THIS HELPED THE SPEED OF BOOTING THIS LAPTOP UP SIGNIFICANTLY. I have the 2GB processor, using Dell's McAffee software (i.e., viurus scan, firewall, etc.) on a Wireless "G" home network w/1 PC. With 256 MB of RAM it seemed to take forever to boot up. I would say that the minum RAM requirment is 512 MB of RAM.