PLEASE helppp BSOD

Can anyone help on what is causing this blue screen. It happens pretty frequently and usually when i run games.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: 1e
BCP1: FFFFFFFFC0000005
BCP2: FFFFF8000289EA46
BCP3: 0000000000000000
BCP4: FFFFFFFFFFFFFFFF
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\092413-19718-01.dmp
C:\Users\Pat\AppData\Local\Temp\WER-42510-0.sysdata.xml

here ya go

AMD Athlon(tm) II X2 270 Processor
Asus M4N68T-M
(1) High Definition Audio Device (2) NVIDIA Virtual Audio Device (Wave Extensible) (WDM)
NVIDIA GeForce GTS 250