The factor having the next greatest impact on printing performance after port type is the application and print driver version. To avoid difficulties with either, you should maintain a record of all versions, configurations, and type of applications for each of your installations.
Many printing problems can be resolved by updating to the latest print services files. These files are available on NetWire® services in NOVLIB Library 06. They are called PU4xXX.EXE and PS4xXX.EXE. The XX in the filename represents a number that increments each time the files are updated.
Test all updates and note changes in performance before distributing new versions to end users.