Source desktop ddr1 ddr2 ddr3 ram 2gb 4gb 8gb factory price only $6.8 on m.alibaba.com
4GB-DDR1-ECC-REG Viking 4GB DDR Server Memory
CMS 512MB (1X512MB) DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Cisco® 2811 Router Main Memory DMemory Ram Upgrade2811-512D for Server Only - C89 at Amazon.com