Video card diagnostics

I don't know of one, but I would use a game or benchmark to push the card and see if any
graphical issues pop up.
 
i used 3dmark06 the other day and it ran fine so i guess graphics card isnt the issue then
 
ATiTool
ATITool is an overclocking utility designed for ATI and NVIDIA video cards.
Design target is to write a light-weight application for the enthusiast - so no questionable registry tweaks. Sorry.

Main Features
No limits overclocking.
Support for overclocking for NVIDIA cards.
Adjustment of GPU and memory voltage (when supported by VGA card).
Tweaking of memory timings (most ATI cards).
Finding maximum core and memory overclock by rendering into a Direct3D window and scanning the output for visual artifacts.
Temperature monitoring and fan speed control (on supported cards).
Removal of Catalyst overclocking lock for 9000/9200/9550/9600 series.
Artifact scanning mode to test for stability.
Loading a predefined clock profile on Application/Windows startup.
Hotkeys that can be used any time to load clocks from a profile.
Extract video card BIOS to file for backup purposes.
3D application detection (Direct3D 8, Direct3D 9, OpenGL) to overclock your video card only when required.
Gamma control
ATITool will only work on Windows 2000/XP/2003 (64 bit versions are supported).
Click to expand...
 
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