However, not all of these accelerators are without their drawbacks. Interrupt driven VGA's, like some of the earlier Diamond Stealth models, can cause problems when receiving characters and files as well. This is not the fault of the VGA, but rather your computer's inability to quickly respond to interrupts. Your computer can only process one interrupt at a time. In this case, interrupts are used both to receive and display characters.
Some interrupts have higher precedence than others.
When this occurs, communication programs may not be serviced because of screen writes. The result of this conflict creates garbage characters or transfer problems. According to their documentation, this interrupt can be removed without causing a problem. If your video card has such a feature, try removing it. This may make your Window's displays a bit slower, but it will remove conflicting interrupt problems at high speed.