Screen Saver, uses CPU?

Does the default Apple screen saver use any CPU processing power?

-I have a G3 tower that is running Mac OS 10.3.9. There is a PCI video card installed.
-I have SETI@Home running on the computer in the background, full time.
-After 3 min of no activity from the mouse or keyboard, the default Apple screen saver comes on. The SETI@Home application continues to run as well.
-I currently have the "Flurry" screen saver chosen.
-I don't want the default Apple screen saver stealing CPU processing cycles from the SETI@Home application. I would rather have 100% of the processor dedicated to SETI@Home rather then being broken up between Flurry and SETI@Home.
-Does the Flurry screen saver use the PCI video card GPU to be rendered, or is the main CPU rendering the screen saver? If Flurry is handled by the video card, that's great and I can leave it running!

Any help is much appreciated,
Thanks!