The Elder Scrolls IV: Oblivion Graphic and Error Problems

[Mango]

-Recommended System Requirements:
* 3.0 Ghz Intel Pentium 4 or equivalent processor
* 1 GB System RAM
* ATI X800 series, Nvidia GeForce 6800 series, or higher video card

-Supported Video Card Chipsets:
ATI X1900 series
ATI X1800 series
ATI X1600 series
ATI X1300 series
ATI X850 series
ATI x800 series
ATI x700 series
ATI x600 series
ATI Radeon 9800 series
ATI Radeon 9700 series
ATI Radeon 9600 series
ATI Radeon 9500 series
NVIDIA Geforce 7800 series
NVIDIA GeForce 6800 series
NVIDIA GeForce 6600 series
NVIDIA GeForce 6200 series
NVIDIA GeForce FX series

from the readme

your graphics card is way too old for this monster

[Zulu]

@RamGuy
Look at THIS thread or google for "oldoblivion"; but to really enjoy the game a good DX9 card with shader model min. 2.0 is highly recommended