Video Memory Stress Test is a small application that is free for home use (but paid for commercial use) and is designed to test the RAM on your video card. Similar to Memtest86+, it will read and write data to each part of the video cards RAM and log any errors found.
I used this application on a machine a few months ago that would get artifacts when playing World of Warcraft, but not during general use. I suspected the video card was dying so I ran this tool and it instantly came up with pages and pages of errors. I swapped the video card and everything was working again so it definitely did its job.
This application comes with both a Windows version and a bootable DOS based ISO which is handy if you cannot get into Windows because of suspected video card problems.
Screenshots:
Downloads:
Download from Official Site – 644kb
Download from Majorgeeks – 644kb

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This seems to work as a portable app, thanks Bryce!
Hey Bryce!
This sounds like a very good piece of diagnostic software. Testing the video card ram isn’t something I would think of. This is going to be a great tool. I like how you used to to diag WoW though. So many people play that game, myself included. Well thanks for the info, and thanks for all your help!
Correct me if I’m wrong but wasn’t this part of Bryce’s late compilation of freeware repair tools?
I never knew there were apps that had the ability to test video cards. I guess this will be quite handy when there are problems with graphics. I will definitely be trying this out and sharing it with my viewers on my blog. Thanks for pointing it out.