openGL renders incredibly slowly on some computers

[Afr0]

I have written a simple program which renders a harmonic oscillator in openGL, and when i run it i get about 30 fps on my "main" computer, which is capable of running games like Crysis faster than 30 fps.

However, when i run the exact same executable on my laptop (a significantly slower computer) i get framerates which are about a order of magnitude higher (about 300 fps).

My main computer has a "GeForce 9800 GTX/9800 GTX+/PCI/SSE2" graphics card, which supports openGL 2.1.2 ( according to glGetString(GL_RENDERER) / glGetString(GL_VERSION) ) while my laptop uses a "Intel Cantiga" (some sort of integrated card probably? ) and supports version 1.5.0 Both computers are running windows XP, the slower one is 64-bit;

I was wondering, does anyone know what this might be caused by? It is quite evidently not the program itself, but rather some sort of library / driver maybe?

[S_M_A]

I've heard that some graphic cards are incredibly slow when handling images with a non 2-based size (i.e. 64 * 128 pixels and so on).

[Afr0]

Ah, thank you for you your reply, however, that is not the case. I am actually not drawing any images, but three line strips consisting of about 500 vertices each. Even when not drawing anything at all this problem persists.

[Lindley]

Odds are you're hitting a software (as opposed to hardware) rendering path for some reason. Couldn't guess why without seeing the code. A good starting point would be to print out the glGetString(GL_EXTENSION) lists from the two machines and compare them to see what's missing on the slower machine.