Summary: Upgraded from the PCI version of this card (the GT) to this. Tested speeds with iperf (simultaneous bidirectional test). Speeds went from 309 - 352 Mb/s on the GT to 903 - 934 Mb/s on this. Speed test is extremely stable over 3 tests, looks like a hard limit somewhere. Though even most enthusiasts will never use them, this card comes with many enterprise-class features - some of which are accessible through its own boot ROM which will come up on boot.
Pros: True gigabit speed, no bottlenecks, Full feature set, Complete indicator LEDs, Low cost, Low profile card, comes with a low-profile bracket
Summary: I've been using Intel NICs for years. Whenever a Broadcom or Realtek motherboard chipset causes crashes, has crappy performance, or other undiagnosed problems, Intel NICs are here to save the day. They include every feature you could want, are incredibly stable and high performance, and work with everything. You're doing yourself a disservice by using anything else.
Pros: Excellent, high performance, well supported in all OSes, cheap.
Summary: I bought this card a few years ago for my brother and later bought one for myself after getting his feedback from it. My brother who plays WoW arenas competitively found his response times and load time felt a lot ore snappier as opposed to using his onboard NIC.
Pros: -Performs as well if not better than $100 NICs, -Small so it wont block airflow, -cheap
Summary: I've had this for a little over a week now and so far it has performed as expected. No surprise; Intel is an industry leader and manufactures the best NICs in the business. I bought this on a referral from an Intel sales rep, after a very engaging presentation he gave through which he enumerated the merits of having a good quality NIC. This one uses copper and can accommodate Cat5 cables up to 100 meters in length. It installs into a PCI Express 1.1 lane, for 2.5GT/s.
Pros: Plug & Play (Windows 7 drivers installed via Windows update), Good-quality construction, 1Gbps, Copper RJ45, Ships w/ both low profile and full height slots/brackets
Summary: For those people who want to make their system run a little better, even adding a dedicated gigabit port can make the difference. The cable checking is a great feature if faults are suspected.
Pros: Great value, nice to remove load from cpu/mobo