Random Freezing in Fedora

[Something Orange]

So on some of my games that have 3D physics engines my game will randomly freeze for a few seconds, fade to clack, then unfreeze in either the same location (if nothing happened) or a different location (if I died or something moved me). This occurs almost exclusively in DoD:S, TF2, and Psychonauts, and I cannot remember it happening on any other games. I think the issue may stem from paticle effects, as this tends to happen during events that use particle effects like fire and bullets, but that's just a total guess.

Any ides?

My specs
Intel i5 processor

Video Card:
Driver: X.Org Gallium 0.4 on AMD REDWOOD
Driver Version: 2.1 Mesa 9.1

Sound card:
Audio device: Realtek ALC272X