I'm not so sure about that. I have an i7 @ 2.8ghz, 9gb of RAM, and a GTS 250.If he is playing EM4 then I doubt FRAPS will take a serious hit on his performance.
It maxes out most games on a 1920 by 1200 screen but I get a large FPS drop of about 15-20 when nothing is selected in EM4 that cause some lag.
P.S. I'm not trying to show off my computer. Just trying to show the FPS drop.