Number of rows that a pivot table can read from SQL Server

Hi All

I have Excel 2007 installed and I have a pivot (around 25 columns) that connects/refreshes from a SQL Server (2005) table. Usually, the pivot refreshes from SQL Server, it cannot read more than 1.7 million rows from the data base table and throws a Not enough memory error after crossing that number.
My question is - Is the number of rows that can be read by a pivot from a SQL server table limited by the processor memory ? So in my case, if I get a more powerful processor, can I make my pivot read 2.2 million rows from the SQL server database table.

Thanks a lot!