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We've got one of these in a Dell Vostro box that we bought about a year or so ago. This card has HD capability but as we've no HD applications this feature hasn't been tested. You can pick up a 5450 for about £30 these days.
The 5450 has VGA, DVI and HDMI inputs, we go through DVI and the output is clear and glitch/artifact free. You get 512MB RAM which is enough to power through all of our CAD applications - Photoshop, Artlantis, ArchiCAD, Cinema 4D and autoCAD mostly. When performing renders or other intensive tasks the 5450 seems to struggle a bit, taking about 40% longer than our higher-performing video cards.
The drivers seem reliable and the card has passed all of the CAD minumim bench tests that we put them through - handling large files, 3D modelling, handling huge textures and more.
I could recommend this card for any standard office computer, or one that doesn't have to perform any very RAM intensive tasks like rendering. Given that it's so cheap you can't really go wrong.