in my server, i have 2 ATTO R380 cards in slots 1 and 2, and 2 4port Small Tree ethernet cards in slots 3 and 4. i use a Newertech USB to DVI adapter to connect to a 24" Dell monitor. no real issues. it can't do anything graphics intensive, but it's a server, so it works fine.
if you ever need to do a OS reinstall, which i just did last week, you have to put the original GFX card back in. after it's setup again, you can pull the GFX card.
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Eric Hansen -
http://www.erichansen.tv