BSOD after upgrading graphics card

[Mandragorin]

I hope someone is able to help. I keep experiencing intermittent BSOD. There doesn't seen to be any pattern to it, it happens when I play games (NWN2, X-rebirth) and when I'm just browsing on the internet or copying files from one disk to another.
I upgraded my graphics card from a radeon hd4890 vapor-x to a sapphire R9 290x Vapor-x (4gb). I did a clean install, removing everything AMD with windows uninstall and then using driver sweeper, before installing catalyst 14.4. I am currently on catalyst 14.2 which is the version that's on the driver disk that came with the card, but still getting the problem

Here's the latest problem description and dump file attached:

Problem signature
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 2057
Files that help describe the problem
082614-33743-01.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.
Extra information about the problem
BCCode: a0000001
BCP1: 0000000000000005
BCP2: 0000000000000000
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

 

[Mandragorin]

Grateful for any pointers or views people may have. Thanks