SUPER cheap used parts server, perfect for NAS and/or router

[maxtch]

China is a weird place, and some impossible builds are possible here. The following is a super cheap server-grade build I can put together using used parts that is perfect as a wireless router/NAS combo. Prices are in CNY. US$ 1 is about CNY 6.5.

• Processor: Intel Xeon X3330 (2.66GHz quad-core), used, CNY 140
• Motherboard: Asus P5BV-C (Intel 3200 northbridge + ICH7R southbridge), used, CNY 180
• RAM: 4x mixed-brand 2GB DDR2-667 ECC, used, CNY 60
• Secondary NIC: Intel 82571EB PCIe dual-port GbE, used, CNY 150
• RAID card: HP P410 with 512MB cache and BBU, used, CNY 110
• PSU: HuntKey HK650-11PEP (550W cont.), used, CNY 100
• Chassis: any ATX mid tower, new, CNY 50
• Wireless adapter: any PCI 150M Wireless-N adapter, CNY 55
• OS: Ubuntu Server 15.10, Linux-based, free

Tally of parts listed above: total of CNY 795 excl. shipping. With all of this you get what is the basics of a proper, enterprise-grade server with 4 gigabit Ethernet links and hardware RAID. For hard drives here are two possibilities:

• router only: 4x Seagate 146GB SAS 6Gb/s, used, CNY 200 total
• router only, maybe some NAS: 8x Seagate 146GB SAS 6Gb/s, used, CNY 400 total
• NAS/router combo: 3x WD Blue 2TB (disable idle3 before attaching to the RAID card), new, CNY 1200 total
• NAS/router combo: 3x WD Blue 3TB (disable idle3 before attaching to the RAID card), new, CNY 1750 total
• NAS/router combo: 6x WD Blue 2TB (disable idle3 before attaching to the RAID card), new, CNY 2400 total

I am not using SSD as neither the P5BV-C motherboard not the P410 RAID card supports SATA 6Gb/s (but it does support SAS 6Gb/s), and the hardware RAID using RAID-5 or RAID-50 will be fast enough.