別灌On-Chip Firewall就行了，nforce3 250GB~nforce4內建網路是好東西耶
前提要有好的Gigabit LAN PHY (Physical Layer)
大多都是Marvell、Broadcom, Realtek(最差)
架構請看http://www.anandtech.com/cpuchipset...aspx?i=2004&p=6
傳輸效能http://www.sudhian.com/showdocs.cfm?aid=539&pid=2023

開firewall 傳輸效能
http://www.sudhian.com/showdocs.cfm?aid=539&pid=2025
20.5G檔案
No Firewall:
CPU Usage: ~18%
Transfer Time: 13 min, 10 seconds.

Norton Firewall 2004:
CPU Usage: Varied between two levels. Typically either 45% or 85%.
Transfer Time: 36 minutes.

NVIDIA Hardware Firewall:
CPU Usage: ~30%.
Transfer Time: 15 min, 16 seconds.

結論：nforce3 250GB的Gigabit 網路效能跟外接gigabit網卡 有過之而無不及
比起其他10/100M的網卡，實在好太多了
k8n neo2 內建Marvell Gigabit 也優於我之前用過的3com 905-TX原型卡，Intel 82559，前提是在宿網傳輸上、若是用ADSL用啥網卡都沒什麼差異