PENTIUM 3. sir,i m using centron 1.20ghz on vai motherboard with 128mb ram and 80gb hdd, intex vga

Question

sir,i m using centron 1.20ghz on vai motherboard with 128mb ram and 80gb hdd, intex vga card.but i can't increase the ratio of resolution due to which a bad graphics are appear on my LCD screen.their is any graphic card available that help to improve the quality of resolution/3d games.what type of hardware/software is required to improve the system.thanking you