I’m a Descent freak, and I can tell you now that D3 takes an @$$ load of power to run well, and ATI’s cards don’t like it too well. I use a GeForce2 GTS, and it runs very well, even without tweaking my system appropriately.
lee - D3 rocks in Glide (3Dfx boards only), but it is really tight on driver requirements. It has to have everything work as it should to look any good, or even to run. D3D will probably run best more most people. And this makes no difference as to what you should use. D3 was designed around Glide, and D3D support was added halfway into development. OpenGL support was put in because it was becoming more popular, but back in late 1998, most OpenGL drivers weren’t even complete, much less bug-free. One thing is always dependent upon another.
Elixer - They only used HW acceleration for D3, but as someone else said, OpenGL will fall back to software if it can’t do something (although D3 usually barfs when it does). ATI’s drivers suck altogether, and my dad made the mistake of getting himself an Xpert 98, so I should know
BTW, if anyone wants a place to talk about D3, go to www.descentbb.net. Great place, busy with posters day and night.