Computer beeps while in Left 4 Dead

[Officerdown]

My computer beeps when in a game. I'm trying to figure out why. It's the sound that happens when you hit several keys or hold them down for a long period of time; however, this happens when I'm not touching any keys at all. What is going on?

I've found it happens when I'm playing Left 4 Dead. I have not noticed it do it outside of the game. I also have a Creative Sound Blaster Audigy card installed. Once again, the sound comes from inside the computer and the beeps are all random - no pattern to them.


Any ideas? Thanks.

Video Card:
ASUS EAH4870 DK/HTDI/1GD5 Radeon HD 4870 1GB 256-bit

Mobo:
GIGABYTE GA-EP45-UD3P LGA 775 Intel P45 ATX Intel Motherboard

PSU:

PC Power & Cooling Silencer PPCS750QBL 750W ATX12V

 

[montag451]

Are you using a usb joystick/kb/mouse?
If so, it is possible that whilst you are playing, you might be yanking it around too much and disconnecting it.

Or, there may be a bad wire in the device.