Happens in both Creative and Survival.
When trying to render any active end portal, my computer crashes.
Although I haven't seen any other computers crash in this situation, I believe that there should be a workaround somehow.
My GPU is very old, and only supports OpenGL 1.4. Is the end portal rendered with a method that is newer than OpenGL 1.4?

-Every other aspect of Minecraft works flawlessly.

I don't believe this will be fixed, since it isn't a common problem. But, can I at least have some sort of explanation? With this problem, I can't even finish the game.