Summary: Works great for our intranet on a 10Gbs switch. This one came with the low-profile bracket we wanted, some do not. Speeds are amazing, not quite 10Gbs of throughput, but about 8x faster than our 1Gbs switch.
Summary: The X540T2 is rock solid with great driver support. However, be careful where you order. I ordered the Intel X540T2 from one of the marketplace sellers here, and instead received apparently used Dell OEM parts with active cooling and no brackets. The official Intel part comes in a sealed box with a half-height and full-height bracket, and is passively cooled as shown in the picture. Be very wary of marketplace sellers on items like this.
Brackets... and other crucial consumer necessary details
Joseph Earl Johnson Jr., Amazon
12 March 2014
Summary: I have 4 of the X520 cards, and the OEM version only comes with a low profile bracket attached. This Description doesn't specify whether this is consumer or OEM. It doesn't specify which bracket sizes are attached... for PCIe slot cards... it is crucial that AMAZON adds specs for PCIe 1/2/3/4 and for x1/x4/x8/x16 lanes. Cards should also list how many slots that it will occupy. This has been the bane of a number of my ordering experiences on AMAZON!!!
Summary: update at 10 months: started having trouble with this unit a few months ago... status reported the cat7 cables were unplugged. after days of fiddling with drivers and teaming settings, i put in a new unit and it works fine. hoping to return the first board under warranty. ------------- at first i installed this into a slot right next to a high end graphics card (though it didn't block that card's fan)... and it did a thermal shutdown and disabled itself.
Summary: In my limited 10gb deployment, this guy really scratches a few itches. This adapter stays ahead of all but my fastest SSD arrays. I really like the dual port, to allow a primary switched and a secondary point-to-point for specific tasks. In tests, CPU is the limiting factor. Servers where I have previously compromised on speed to get more cores really show their pokiness. Strap this to a good CPU and it'll saturate it.