Open GL and Direct 3D settings

In the Detonator 3 open Gl settings what is the memory max for textures in PCI mode supposed to be, mine is set at 30mb. And in the Direct 3D settings, it’s set at 127mb for textures in PCI mode. My PC has 256mb RAM and P3-700mhz 100mhz bus, and a Riva TNT2 card that works awesome on Quake 3 since the new D-3 drivers were installed.
I just basically want to make sure I have all these open gl settings right. Thanks !!

Games work more thatn fine with only 8mb texture memory