Just give you guys a head up, I bought 6 of these and they all work fine with ESXi 4.1 in a regular PCI slot. Just watch out for clearance on the southbridge/northbridge heatsinks on your motherboard

Looks like i have to trim mine before I can populate all 2 PCI slots
-So far I have 1 in my Openfiler server, wanted 2 but southbridge heatsink got in the way.
-My 2 ESXi systems, i was able to get 1 into the Biostar mobo and 2 in the Asrock mobo.
It's a low profile card but it does not come with a low profile bracket btw.
http://www.txcesssurplus.com/servlet/the-1534/Dell-J1679-Intel-Pro-fdsh-1000/Detail