|According to this page: https://support.google.com/earth/an...|
the recommended graphics requirements are:
a card which is DirectX9 and 3D capable with 256MB of VRAM
It doesn't even mention Shader support.
Any modern card with it's own dedicated RAM, even a cheap basic one, meets the above requirements so I can't understand why you say you can't find one. Unless your PC is so old that it doesn't have any PCI slots, which is very unlikely for a Pentium 4 machine.
message edited by phil22