Canon SD750 and Photos

[Gimli]

Full Image: http://farm4.static.flickr.com/3105/...014c9fdb_o.jpg

The above photo I am trying to figure out why it was so grainy when it was shot with my canon SD750. The exif info is as follows:

3072x1728
180 dpi
24 bit
1/125 exposure
4.5f
14mm focal length
ISO 80

When I use it to display on my monitors (2580x1024) it is really grainy. I am trying to figure out how I can take better photos (if it's possible with the camera) so I can have cool, crisp wallpapers for my computers. People have also been intersted in my photography for wallpapers etc but if they come out grainy it's a bit meh right?

Am I doing something wrong, or is the camera not capabile what a task like this?