Hi,
Do we need a powerful graphics card for cache tile creation or only more cpu cores?
Are you creating traditional or vector tile cache?
Traditional tile cache. (from raster)
Cool - no graphics card not required. Would be good if you can put source data on one drive and burn to another. Read one, write the other. Helps with I/O. CPU counts as well. Don't burn on production, unless it's out of hours and you know it will complete in time (before next day).