In order to take advantage of the 3DNow! Instructions on the K6-2 you must have software support, that is the catch on which the success of the entire K6-2 platform is based upon. Without software support, you have nothing more than a K6 running at a high clock speed. Support for the instructions can come in many flavors, the most intelligent move by AMD was to work with Microsoft on including 3DNow! support in Microsoft's next release of their Direct X API (Application Programming Interface), Direct X 6.0 to be specific. In that case, any game using Direct X 6 will experience a small benefit, but naturally not the full benefit, from the 3DNow! instructions.
In the event that a game is written to specifically use the 3DNow! instruction set it will experience a definite improvement on a K6-2 system in comparison to a standard K6 system, an improvement that can even eliminate the performance barrier between a Pentium II and a K6-2 system. Games can, of course, be patched to take advantage of 3DNow! instructions, however as of now Quake 2 is the only game which has been blessed with that. Don't expect too many older games to be re-worked with 3DNow! support, however you can expect increasing amounts of support in new and upcoming games. A perfect example of this would be G.T. Interactive's visual wonder, Unreal which has native support for the K6-2 and its 3DNow! instruction set, a feature which is evident in its performance on K6-2 systems.