Here is how to check the CPU type in CentOS:
# dmidecode --type processor
Output:
# dmidecode 2.12 SMBIOS 2.7 present. Handle 0x0004, DMI type 4, 42 bytes Processor Information Socket Designation: CPU 1 Type: Central Processor Family: Xeon Manufacturer: Intel ID: D7 06 02 00 FF FB EB BF Signature: Type 0, Family 6, Model 45, Stepping 7 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) Xeon(R) CPU E5-2620 0 @ 2.00GHz Voltage: 0.0 V External Clock: 100 MHz Max Speed: 4000 MHz Current Speed: 2000 MHz Status: Populated, Enabled Upgrade: Socket LGA2011 L1 Cache Handle: 0x0005 L2 Cache Handle: 0x0006 L3 Cache Handle: 0x0007 Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Core Count: 6 Core Enabled: 1 Thread Count: 12 Characteristics: 64-bit capable Multi-Core Hardware Thread Execute Protection Enhanced Virtualization Power/Performance Control Handle 0x0008, DMI type 4, 42 bytes Processor Information Socket Designation: CPU 2 Type: Central Processor Family: Xeon Manufacturer: Intel ID: D7 06 02 00 FF FB EB BF Signature: Type 0, Family 6, Model 45, Stepping 7 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) Xeon(R) CPU E5-2620 0 @ 2.00GHz Voltage: 0.0 V External Clock: 100 MHz Max Speed: 4000 MHz Current Speed: 2000 MHz Status: Populated, Enabled Upgrade: Socket LGA2011 L1 Cache Handle: 0x0009 L2 Cache Handle: 0x000A L3 Cache Handle: 0x000B Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Core Count: 6 Core Enabled: 1 Thread Count: 12 Characteristics: 64-bit capable Multi-Core Hardware Thread Execute Protection Enhanced Virtualization Power/Performance Control