Hmm lol it must be your computer telling you that you have not installed the new video card correctly, or there is some other error that is causing the beep. I have never heard of a continuous beep before so i can't tell you what exactly is wrong.
Or you did this:
program Sounds;
uses
crt;
begin
Sound(1000);
Delay(1000);
end.
Forgetting the NoSound; after Delay(1000); would cause a continuos beep.
what i think it is, is that your video card isnt installed properly, the sound is probably coming from your monitor from impropor drivers or bad refresh rates.
what are you doing when the beeping starts?
i hear beeps from my computer when i play cs because i press alot of buttons on the keyboard at the same time. but the beeps are not continously.
check to see is a key on your keyboard is jammed becus when a button is held down it to makes a very annoying beep sound, and it does that untill the key is released.