raidapitx2k.dll is a raidapitx2k
belonging to Promise Technology RAID API for FastTrakTX2K
from Promise Technology
Non-system processes like raidapitx2k.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.