Please Help, Motherboard Bios Beep Codes

[Invictus]

Hey Fellas ,
I've been having some issues with my computer, Blue Screens and what not.
Managed to fix my BSOD issues BUT a new one has come up.
I would be playing a game (happens most frequently on Crysis 2) but what happens is my
computer will stop, fans stop, screen goes black and while this is happening my computer beeps.
1 short beep, now i think my PSU is failing me but i'm not sure. I really just wanted clarification on what the beep codes were.
If anyone can help me, that would be fantastic.
Thanks in advance.

[dmdilks]

Here are the Beep Codes. Plus when was the last you clean in side your computer?

AWARD BIOS
1short beep ：System normal
2 short beep ：CMOS Error
1 long beep and 1 short beep：Memory error
1 long beep and 2 short beep：Graphic card error
1 long beep and 3 short beep ：AGP error
1 long beep and 9 short beep : Memory Error
Continuous long beep ：Memory not correctly installed
Continuous short beep ：Power supply unit failed

AMI BIOS
1 short beep ：Memory Error
2 short beep：Memory parity check error.
3 short beep ：basic memory 64K address check error
4 short beep ：Real Time Clock malfunction .
5 short beep ：CPU error
6 short beep：Keyboard error
7 short beep ：CPU interruption error
8 short beep：Graphic card error
9 short beep ：Memory error
10 short beep ：CMOS error
11 short beep ：CPU cache memory malfunction