Processor (CPU)
CPU Name
Intel® Xeon® CPU E5520 @ 2.27GHz
Threading
2 CPU - 8 Core - 16 Threads
Frequency
2393.64 MHz (18 * 132.98 MHz) - Uncore: 2127.7 MHz
Multiplier
Current: 18 / Min: 12 / Max: 19
Architecture
Gainestown / Stepping: D0 / Technology: 45 nm
CPUID / Ext.
6.A.5 / 6.1A
IA Extensions
MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, VT-x
Caches
L1D : 32 KB / L2 : 256 KB / L3 : 8192 KB
Caches Assoc.
L1D : 8-way / L2 : 8-way / L3 : 16-way
Microcode
Rev. 0x19
TDP / Vcore
80 Watts /
Temperature
54 °C / 129 °F
Type
Retail (Stock Frequency : 2266 MHz)
Cores Frequencies
#00: 1595.8 MHz  #01: 1594.9 MHz  #02: 1595.8 MHz  #03: 1595.8 MHz 
#04: 1595.8 MHz  #05: 1595.8 MHz  #06: 1595.8 MHz  #07: 1595.8 MHz 
Motherboard
Model
Apple Inc. Mac-F223BEC8
Socket
Socket 1366 LGA
North Bridge
Intel 5520 rev 13
South Bridge
Intel 82801JR (ICH10R) rev 00
BIOS
Apple Inc. XS31.88Z.0081.B06.0908061300 (08/06/09)
Memory (RAM)
Total Size
24576 MB
Type
Triple Channel (192 bit) DDR3-SDRAM
Frequency
531.9 MHz (DDR3-1064) - Ratio 2:8
Timings
7-7-7-20-1 (tCAS-tRCD-tRP-tRAS-tCR)
Graphic Card (GPU)
Miscellaneous
Windows Version
Microsoft Windows 10 (10.0) Professional 64-bit
CPU-Z Version
1.87.0 (64 bit)