So yea, I've noticed that my performance has seemed to take a hit in Fallout 3.  It basically starts to chug at certain points, framerate problems mostly. Its not a consistent issue, but is kind of a pain in the ass.
 
Lately I've been installing and running some mods in fallout 3, but nothing heavy - I have M4 carbines mod, a glock and H&K pistol mod, and the Steiner combat gear mod running, but that's pretty much it. 
 
Was just wondering if anyone noticed a performance dip after installing their mods, or if I should just stop putting so much pressure on my GFX card :)

Mods in general regardless of the game tend to impact performance pretty substancially.