购买各大公司淘汰下来的二手服务器靠谱吗？
俺买了一台 256GB 内存的。
图的就是内存比较大， 方便俺上网怼人，
特别是那些试图教育俺内存和硬盘的基本知识的。
附录：
第一次用 256GB 内存的电脑 -- 麦文学看图说话系列
话说 1996 年的时候， 俺就用过内存 256MB 以上的电脑， 从那时起就对内存有了一种畸恋 （Fetishism）.
最近报完税了，兜里还剩点零花钱，思量着买个电脑来玩玩。最后看上了带 256GB 内存 （32x8GB）+ 24核CPU (4X6c) 的Dell PowerEdge R900 .
经过漫长的等待， 冰天雪地的早上， 终于到货了。 快递公司的司机问， 这纸盒里面啥玩意那么重， 差不多 100 磅了， 不会是尸体吧？俺说是俺的二手电脑。运费 300 多刀。
俺手无缚鸡之力， 一个人根本抬不起来。 用滚的办法， 一路将箱子滚到了地下室， 再用滚动的办法把开了箱的电脑滚上了架子。
上个玩家在里面装了个 Windows 2012 Server 评估版， 俺觉得碍眼就用 Fedora 把它替代了。
如图：
分享一点经验：
- 风扇声音确实有点大，如果只插上一个电源 开机后的几十秒，和半匹~一匹马力的吸尘器差不多。（机器认为是故障，所以风扇不降速）
2. 如果插上两个电源， 正常运行的时候， 风扇声音会下降很多很多。 如图：
3. 32 条 8GB 内存， 在运输过程中可能会松脱， 松脱的话黄灯会亮。
4. 软起动， 例如 reboot , 不会再发出喷气机般的巨响。
5. 耗电量明天再测。
电脑和耳机有啥关系呢？
俺打算用这个电脑来仿真耳机以及电路， 而且这个电脑还不够一个 Sennheiser HD800 贵。
您信吗？ 俺信了， 而且买回家了。
256GB 内存 （32x8GB）+ 24核CPU (4X6c) 的Dell PowerEdge R900
当然， 这是俺 DIY 家庭微型集群的第一步， 敬请大家指点：
贝奥武夫机群（Beowulf cluster），又称贝奥伍尔夫集群，是一种高性能的并行计算机集群结构，特点是使用廉价的个人电脑硬件组装以达到最优的性能/价格比。得名于古英语著名史诗《贝奥武夫》。于1994年最早在NASA为Donald Becker等人开发，是目前科学计算中流行的一类并行计算机。最常见的方式是把相同个人电脑作为组装单元，运行Linux或BSD系统。各个单元之间通过小型TCP/IP局域网和有关的程序库来分配计算任务和通信。常用的并行程序库包括MPI和PVM。
【更新】
运行了一夜，没有什么问题出现。每一条ECC内存似乎都是好的：
dmidecode -t 17
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.5 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: 8192 MB
Form Factor: FB-DIMM
Set: 1
Locator: DIMM A1
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
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: FB-DIMM
Set: 1
Locator: DIMM B1
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
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: 8192 MB
Form Factor: FB-DIMM
Set: 2
Locator: DIMM C1
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
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: 8192 MB
Form Factor: FB-DIMM
Set: 2
Locator: DIMM D1
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1104, 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: FB-DIMM
Set: 3
Locator: DIMM A2
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1105, 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: FB-DIMM
Set: 3
Locator: DIMM B2
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1106, 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: FB-DIMM
Set: 4
Locator: DIMM C2
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1107, 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: FB-DIMM
Set: 4
Locator: DIMM D2
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1108, 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: FB-DIMM
Set: 5
Locator: DIMM A3
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1109, 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: FB-DIMM
Set: 5
Locator: DIMM B3
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x110A, 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: FB-DIMM
Set: 6
Locator: DIMM C3
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x110B, 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: FB-DIMM
Set: 6
Locator: DIMM D3
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x110C, 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: FB-DIMM
Set: 7
Locator: DIMM A4
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x110D, 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: FB-DIMM
Set: 7
Locator: DIMM B4
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x110E, 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: FB-DIMM
Set: 8
Locator: DIMM C4
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x110F, 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: FB-DIMM
Set: 8
Locator: DIMM D4
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1110, 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: FB-DIMM
Set: 9
Locator: DIMM A5
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1111, 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: FB-DIMM
Set: 9
Locator: DIMM B5
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1112, 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: FB-DIMM
Set: 10
Locator: DIMM C5
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1113, 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: FB-DIMM
Set: 10
Locator: DIMM D5
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1114, 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: FB-DIMM
Set: 11
Locator: DIMM A6
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1115, 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: FB-DIMM
Set: 11
Locator: DIMM B6
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1116, 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: FB-DIMM
Set: 12
Locator: DIMM C6
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1117, 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: FB-DIMM
Set: 12
Locator: DIMM D6
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1118, 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: FB-DIMM
Set: 13
Locator: DIMM A7
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x1119, 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: FB-DIMM
Set: 13
Locator: DIMM B7
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x111A, 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: FB-DIMM
Set: 14
Locator: DIMM C7
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x111B, 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: FB-DIMM
Set: 14
Locator: DIMM D7
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HMP31GF7EMR4C-Y5D5
Rank: 4
Handle 0x111C, 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: FB-DIMM
Set: 15
Locator: DIMM A8
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HYMP31GF72CMP4D5Y5
Rank: 4
Handle 0x111D, 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: FB-DIMM
Set: 15
Locator: DIMM B8
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HYMP31GF72CMP4D5Y5
Rank: 4
Handle 0x111E, 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: FB-DIMM
Set: 16
Locator: DIMM C8
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HYMP31GF72CMP4D5Y5
Rank: 4
Handle 0x111F, 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: FB-DIMM
Set: 16
Locator: DIMM D8
Bank Locator: Not Specified
Type: DDR2 FB-DIMM
Type Detail: Synchronous
Speed: 667 MT/s
Manufacturer: 80AD7FB380AD
Serial Number: Omitted
Asset Tag: Omitted
Part Number: HYMP31GF72CMP4D5Y5
Rank: 4
[root@fat4u ~]#
[root@fat4u ~]#
【更新】
散耗功率 652W （平稳） ~ 750 W (启动后10秒内)
