Complex sentence: Xfire also has the ability to record video in-game, though this can have a significant impact on game performance and recording quality if one has a low-performance system, causing the frame rate to slow dramatically.
Split into simpler sentences: Xfire also has the ability to record video in-game. However, it can have a significant impact on game performance and recording quality if one has a low-performance system, causing the frame rate to slow dramatically.