crash after changing video card (from nvidia to amd radeon)

[daimaku]

hello, like the title says, after changing my video card, i'm having problems with all the projects that i have in my hard disk.

i try to launch the unreal editor and it crashes, it says "udk stop working" and this is all i have in the log file

Log: Log file open, 05/07/13 19:06:16
Init: WinSock: version 1.1 (2.2), MaxSocks=32767, MaxUdp=65467
DevConfig: GConfig::Find has loaded file:  ..\..\Engine\Config\ConsoleVariables.ini
Init: Version: 10897
Init: Epic Internal: 0
Init: Compiled (32-bit): Feb 13 2013 11:16:29
Init: Changelist: 1532151
Init: Command line: editor
Init: Base directory: J:\UDK\UDK-2013-02_nvidia\Binaries\Win32\
[0001.45] Init: Computer: ENZO-PC
[0001.45] Init: User: Enzo
[0001.45] Init: CPU Page size=4096, Processors=8
[0001.45] Init: High frequency timer resolution =3.517841 MHz
[0001.45] Init: Memory total: Physical=15.9GB (16GB approx) Pagefile=31.9GB Virtual=4.0GB
[0001.46] Log: Steam Client API Disabled!
[0001.57] Init: WinSock: I am Enzo-PC (192.168.2.3:0)
[0001.57] Init: Presizing for 0 objects not considered by GC, pre-allocating 0 bytes.
[0001.60] Init: Object subsystem initialized
[0001.61] Log: Last hardware survey: Ver=-1, Date=0. Uploading again.
[0002.92] Log: SystemSettings based on: SystemSettings
[0003.01] Log: Found D3D11 adapter 0: AMD Radeon HD 7900 Series
[0003.01] Log: Adapter has 3039MB of dedicated video memory, 0MB of dedicated system memory, and 3811MB of shared system memory
[0003.03] Log: Shader platform (RHI): PC-D3D-SM3
[0003.64] Log: PhysX GPU Support: DISABLED
[0003.79] Init: Initializing FaceFX...
[0003.82] Init: FaceFX 1.7.4 initialized.
[0009.07] Log: Successfully upload UDK hardware survey to http://et.epicgames.com/PostUDKSurveyHandler.ashx in 3.26 seconds.
[0009.07] Exit: Preparing to exit.
[0009.14] Exit: Object subsystem successfully closed.
[0009.19] Log: Shutting down FaceFX...
[0009.22] Log: FaceFX shutdown.
[0009.24] Exit: Exiting.
[0009.24] Log: Log file closed, 05/07/13 19:06:24

but if i try with a clean install and copy all the files into the new installation it will work.

any ideas why is this happening ? i have some projects that i have made with the beta of september 2010, don't know if i have the original setup file for that.

thanks in advance for all the help.

[daimaku]

after a lot of research, the problem was caused because my card was overcloked by default by the catalyst drivers, when i turn off the overclock feacture all my old project has worked fine.