Both Quake 1 and Quake 2 ran fine on my Pentium MMX (and i guess regular Pentium since they didn't use the MMX stuff) using the software rasterizer and Quake 3

Both Quake 1 and Quake 2 ran fine on my Pentium MMX (and i guess regular Pentium since they didn't use the MMX stuff) using the software rasterizer and Quake 3 also ran fine on my Pentium 2 with a GeForce 2.