http://www.nongnu.org/dmidecode/
http://man.cx/dmidecode%288%29

自作とかしてないと dmidecode とか使わないよなぁ、と心の隅に置いていただけのコマンドであるが、自分サーバ自作してたんだった(´ー｀；)
オプションなしで実行すると山盛りの情報が出てくるので、--type だけはちゃんと覚えておこう。

-t, --type TYPE
    Only  display  the  entries  of type TYPE. TYPE can be either a DMI type number, or a comma-separated list of type numbers, or a
    keyword from the following list: bios, system, baseboard, chassis, processor, memory, cache, connector, slot. Refer to  the  DMI
    TYPES  section  below for details.  If this option is used more than once, the set of displayed entries will be the union of all
    the given types.  If TYPE is not provided or not valid, a list of all valid keywords is printed  and  dmidecode  exits  with  an
    error.

Thinkpad X230 でプロセッサ情報を見ると以下のようになる。

$ sudo dmidecode  --type processor
# dmidecode 2.11
SMBIOS 2.7 present.

Handle 0x0001, DMI type 4, 42 bytes
Processor Information
        Socket Designation: CPU Socket - U3E1
        Type: Central Processor
        Family: Core i5
        Manufacturer: Intel(R) Corporation
        ID: A9 06 03 00 FF FB EB BF
        Signature: Type 0, Family 6, Model 58, Stepping 9
        Flags:
                FPU (Floating-point unit on-chip)
                VME (Virtual mode extension)
                DE (Debugging extension)
                PSE (Page size extension)
                TSC (Time stamp counter)
                MSR (Model specific registers)
                PAE (Physical address extension)
                MCE (Machine check exception)
                CX8 (CMPXCHG8 instruction supported)
                APIC (On-chip APIC hardware supported)
                SEP (Fast system call)
                MTRR (Memory type range registers)
                PGE (Page global enable)
                MCA (Machine check architecture)
                CMOV (Conditional move instruction supported)
                PAT (Page attribute table)
                PSE-36 (36-bit page size extension)
                CLFSH (CLFLUSH instruction supported)
                DS (Debug store)
                ACPI (ACPI supported)
                MMX (MMX technology supported)
                FXSR (FXSAVE and FXSTOR instructions supported)
                SSE (Streaming SIMD extensions)
                SSE2 (Streaming SIMD extensions 2)
                SS (Self-snoop)
                HTT (Multi-threading)
                TM (Thermal monitor supported)
                PBE (Pending break enabled)
        Version: Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz
        Voltage: 0.9 V
        External Clock: 100 MHz
        Max Speed: 2600 MHz
        Current Speed: 2600 MHz
        Status: Populated, Enabled
        Upgrade: Socket rPGA988B
        L1 Cache Handle: 0x0003
        L2 Cache Handle: 0x0004
        L3 Cache Handle: 0x0005
        Serial Number: None
        Asset Tag: None
        Part Number: None
        Core Count: 2
        Core Enabled: 2
        Thread Count: 4
        Characteristics:
                64-bit capable

メモリの情報は以下のような感じだ。現状 4G しか載ってないが最大16GBらしい。今度頼んでおこう(*´〜｀)

$ sudo dmidecode  --type memory
# dmidecode 2.11
SMBIOS 2.7 present.

Handle 0x0007, DMI type 16, 23 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: None
        Maximum Capacity: 16 GB
        Error Information Handle: Not Provided
        Number Of Devices: 2

Handle 0x0008, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0007
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 4096 MB
        Form Factor: SODIMM
        Set: None
        Locator: ChannelA-DIMM0
        Bank Locator: BANK 0
        Type: DDR3
        Type Detail: Synchronous
        Speed: 1600 MHz
        Manufacturer: Hynix/Hyundai
        Serial Number: 1082DC09
        Asset Tag: None
        Part Number: HMT351S6CFR8C-PB  
        Rank: Unknown
        Configured Clock Speed: 1600 MHz

Handle 0x0009, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0007
        Error Information Handle: Not Provided
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: None
        Locator: ChannelB-DIMM0
        Bank Locator: BANK 2
        Type: Unknown
        Type Detail: None
        Speed: Unknown
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: None
        Part Number: Not Specified
        Rank: Unknown
        Configured Clock Speed: Unknown