AMD Radeon HD xFx 6790 Crashing my PC

I got a graphics card from my friend about 2 weeks ago and I've been experiencing crashes since day one of installing it. I have all of the latest drivers for it and it seems to happen when ever it pleases. The freeze screens have varied over time from white and black horizontal lines to blue and white horizontal lines to the most recent purple and black vertical lines.

Someone please help!

My Specs:
AMD 6100 black edition processor
AMD HD XFX Radeon 6790
8gb DDR3 RAM
300gb HDD
Gigabyte 78LMT-S2P Motherboard
Thermaltake TR 700W PSU

I can play for HOURS and this problem doesn't occur from overheating or something because it happens when I'm not in-game or when I'm casually using my PC.

for anyone who need the crash info I have it here:
Source
Windows

Summary
Video hardware error

Date
?11/?23/?2013 9:27 PM

Status
Not reported

Description
A problem with your video hardware caused Windows to stop working correctly.

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

Files that help describe the problem
WD-20131119-2208.dmp
sysdata.xml
WERInternalMetadata.xml

Extra information about the problem
BCCode: 117
BCP1: FFFFFA8007258010
BCP2: FFFFF88004339E80
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1


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: 124
BCP1: 0000000000000000
BCP2: FFFFFA8007E8C788
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

McAfee Service Host
Problem: Stopped working
Files that help describe the problem:
AppCompat.txt
WERInternalMetadata.xml
WERDataCollectionFailure.txt
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Windows
Problem: Video hardware error
Files that help describe the problem:
WD-20131119-2208.dmp
sysdata.xml
WERInternalMetadata.xml
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Windows
Problem: Video hardware error
Files that help describe the problem:
WD-20130905-2108.dmp
sysdata.xml
WERInternalMetadata.xml
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Windows
Problem: Shut down unexpectedly
Files that help describe the problem:
111713-21372-01.dmp
sysdata.xml
WERInternalMetadata.xml
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Windows
Problem: Shut down unexpectedly
Files that help describe the problem:
112313-22479-01.dmp
sysdata.xml
WERInternalMetadata.xml
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Windows
Problem: Video hardware error
Files that help describe the problem:
WD-20130908-1830.dmp
sysdata.xml
WERInternalMetadata.xml
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Windows
Problem: Video hardware error
Files that help describe the problem:
WD-20130723-2207.dmp
sysdata.xml
WERInternalMetadata.xml
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Windows
Problem: Video hardware error
Files that help describe the problem:
WD-20130908-1918.dmp
sysdata.xml
WERInternalMetadata.xml
View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.







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: 124
BCP1: 0000000000000000
BCP2: FFFFFA8007E568F8
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

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: 124
BCP1: 0000000000000000
BCP2: FFFFFA8007E568F8
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA80075B68F8
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA8007E7A4F8
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1