3dSprites vs Image

Blitz3D Forums/Blitz3D Programming/3dSprites vs Image

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Are there any known factors regarding the speed of using an image as a sprite instead of a 3d sprite when overlayed on a 3d cube (or any 3d background).

Basically I have a 3d rotating background and a 2d spaceship image flying over the top. This runs fine on my machine but REALLY slow on my girlfriends.

My spec : AMD 2600, FX5200 GFX card, WinXP
Girlfriends : AMD 1900, 32mb gfx on mother board and WinXP

Is this because I am using an image instead of a 3d sprite?