Excel 2007 will use multi-threaded calculation to improve recalc speed on
multi-core nachines, but much larger improvements are usually possible by
finding and improving the calculation hotspots/bottlenecks.

Charles
___________________________________
The Excel Calculation Site
http://www.decisionmodels.com

"Keith" wrote in message
...
Hi, we have an 80 mg spreadsheet which takes about 20 to recalculate with
Excel 2003 on a quad core Dell PC. Task manager of course shows that it
is
only useing 25% of the processor to do the recalc. This runs 2 times /
hours
24 x 7. Is it possible to dedicate more cores? How much will that
improve
the recalc time?

Thanks