总结：服务器现在拥有14G内存，它由4个插槽（2G + 2G + 2G + 8G ）组成，因为它在一个插槽中获得最大内存为8G ，为什么最大容量是16G，而不是8 * 4 = 32G
这里是细节：
klg @ gentoo：〜$ free -m
total used free shared buffers cached Mem: 14022 12270 1751 0 45 7189 klg @ gentoo：〜$ sudo dmidecode -t 17 [sudo]密码为klg：
# dmidecode 2.11 SMBIOS 2.6 present. Handle 0x1100, DMI type 17, 28 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB Form Factor: DIMM Set: 1 Locator: DIMM_A1 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 1333 MHz Manufacturer: 019800000000 Serial Number: 5D3BFD38 Asset Tag: 04105200 Part Number: 9965413-011.A00LF Rank: 2 Handle 0x1101, DMI type 17, 28 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 8192 MB Form Factor: DIMM Set: 1 Locator: DIMM_A2 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 1600 MHz Manufacturer: 019800000000 Serial Number: F72AA08D Asset Tag: 04144700 Part Number: 9965525-116.A00LF Rank: 2 Handle 0x1102, DMI type 17, 28 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB Form Factor: DIMM Set: 2 Locator: DIMM_A3 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 1333 MHz Manufacturer: 019800000000 Serial Number: 5E3B4C08 Asset Tag: 04105200 Part Number: 9965413-011.A00LF Rank: 2 Handle 0x1103, DMI type 17, 28 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB Form Factor: DIMM Set: 2 Locator: DIMM_A4 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 1333 MHz Manufacturer: 019800000000 Serial Number: 6D3ACDE3 Asset Tag: 04105200 Part Number: 9965413-011.A00LF Rank: 2
更新：使用戴尔R210 http://www.dell.com/downloads/global/products/pedge/en/PowerEdgeR210TechGuide_04052010.pdf阅读指南后，发现：
System Capacity|System Memory Speed|DIMM Speed|DIMM_T ECH|DIMM Capacity |NUM_DI MM|Slot|NUM_Rank|Data Width 8GB 1333 1333 UDIMM 4 2 1,2 2 X8 16GB 1066 1066 UDIMM 4 4 1,2,3,4 2 X8
**似乎最大应该是16Gx4 = 32G，在1066MHZ **
klg @ gentoo：〜$ sudo dmidecode -t 16 [sudo]密码为klg：＃dmidecode 2.11 SMBIOS 2.6存在。
Handle 0x1000, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Multi-bit ECC Maximum Capacity: 16 GB Error Information Handle: Not Provided Number Of Devices: 4
最大容量：16 GB ，看起来很奇怪。 操作系统，使用Ubuntu 12.04。