Well I did a little searching around online and I find that card model VisionTek 5450 recommending 350 watts. here on amazon you can look at the box pic. http://www.amazon.com/VisionTek-Radeon-Express-Graphics-900315/dp/B003ICX0A4
. If you zoom on up on the picture with the box on it said 350 watts recommended . I'm not sure what memory size that card has. 512 MB, 1GB, 2GB? I know you said it was 250 watts, but are you sure he didn't see it wrong. If im wrong then im not sure what else it could be.