Where are power saving/screen saver settings in GNOME3?

hi sorry for the stupid question - can anyone tell me why my monitors turn off after 10min? I can’t find any screen saver and/or power saving setting for this. I’m on suse 11.4 and gnome3

Click on your username, then System Settings -> Screen

Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 11.4 (x86_64) Kernel
up 5 days 7:08, 4 users, load average: 0.25, 0.19, 0.16
GPU GeForce 8600 GTS Silent - Driver Version: 280.13

Do you happen to know where to find screensaver settings? Can’t find those anywhere and I just ditched Windows for Linux.
openSUSE 12.1 (x86_32) Kernel 3.1.0-1.2-desktop
GNOME 3.2.1