Size of a string

[RodAG]

I'm using a computer with 4 GB DDR3 Memory and Intel core i5 processor.
My question is about the max size of a string/list.

I want to make operations over a matrix of, let's say 30 rows and about 1500 columns (one character per column). Is it possible with the above specifications or should I split the matrix into pieces so each one has less columns?

[bvdet]

A matrix of that size would only use a small part of your memory.