More rows and columns, and other new limits
To enable you to explore massive amounts of data in worksheets, Office Excel 2007 supports up to 1 million rows and 16 thousand columns per worksheet. Specifically, the Office Excel 2007 grid is 1,048,576 rows by 16,384 columns, which provides you with 1,500% more rows and 6,300% more columns than you had available in Microsoft Office Excel 2003. For those of you who are curious, columns now end at XFD instead of IV.
Instead of 4 thousand types of formatting, you can now use an unlimited number in the same workbook, and the number of cell references per cell are increased from 8 thousand to limited by available memory.
To improve the performance of Excel, memory management has been increased from 1 GB of memory in Microsoft Office Excel 2003 to 2 GB in Office Excel 2007.
You will also experience faster calculations in large, formula-intensive worksheets because Office Excel 2007 supports dual-processors and multithreaded chipsets.
Office Excel 2007 also supports up to 16 million colors.