I looked up your computer and it has 512 MB of RAM. You will need to upgrade your RAM to use the effects or the Unity desktop.
Here are the system requirements:
Hope that helps.
1 GHz x86 processor
1 Gb of system memory (RAM)
8 Gb of hard-drive space
Graphics card and monitor capable of 1024 by 768
Either a Cd/Dvd-Drive or a Usb port (or both)
Internet access is helpful
+1 for Xubuntu or you might want to check out Lubuntu: http://lubuntu.net/ it runs LXDE instead of Unity/Gnome (Ubuntu) or Xfce (Xubuntu).
Edit: Here is a link to the System Requirements documentation: https://help.ubuntu.com/community/In...emRequirements .