bccode 116 help?

My computer (Win7 64bit retail) has been intermittently crashing while playing games after upgrading my graphics card. All components are less than a month old, other than my psu, which is 2.5 years old and is rated for 1000w. Not always, but sometimes, this error will appear on reboot. Help?

Problem signature:
Problem Event Name:
BlueScreen
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 1033
Additional information about the problem:
BCCode: 116
BCP1: FFFFFA80040B14E0
BCP2: FFFFF88007BE823C
BCP3: FFFFFFFFC000009A
BCP4: 0000000000000004
OS Version: 6_1_7600
Service Pack: 0_0
Product: 768_1