Hi Gea, I didn't run a specific command, I used the OI version of Task manager (forget what it's called- system something or something).
it quite clearly shows that only 360mb-ish of ram is used but Napp-it is showing almost complete memory useage - i will try the other commands tonight to...
I'm not sure where I should post this to be honest but I've loaded up a fresh copy of OI with GUI and then installed Napp-it which is all ok and works as expected, if i open the task manager to view ram / cpu and network usage and then run the internal benchmarks through the napp-it interface...