The fastest, and also the most cost-effective, computers are balanced systems which are then tweaked for optimal performance . Make more usable RAM available for your programs. Use the lowest screen resolution , and color depth, that is acceptable for your needs. This is usually 800 x 600, and 16 bit, for the Home computer. Experiment with 24-bit if you have that.
Graphic speed is controlled, in the main, by the chipset on that card.
If you ever encounter a problem that could be video related, then try the effect of reducing the Acceleration. Install it correctly, and get to know its functions. MTU is MaxMTU, and RWIN is RecWindow. Windows 98 has the new self-adjustable Registry setting. Look in Control Panel Network Dailup Adapter Advanced IP Packet Size .