Core 2 duo E6400-lga 775-2.13 GHz-SL9T9.

Source: 
SL9T9 (Intel Core 2 Duo E6400) (cpu-world.com)

General information
TypeCPU / Microprocessor
FamilyIntel Core 2 Duo
Processor number  ? E6400
Part numberHH80557PH0462M
BX80557E6400
Frequency  ? 2.133 GHz
Bus speed  ? 1.066 GHz
Clock multiplier  ? 8
Package type775-land FC-LGA6
Socket typeSocket 775 (LGA775)
Architecture / Microarchitecture / Other
CPUID06F2h
Core steppingL2
Qualification sampleQUHB
Previous steppingSL9S9
Processor coreAllendale
Manufacturing technology0.065 micron
The number of cores2
L2 cache size  ? 2 MB
FeaturesEM64T technology  ? 
Enhanced SpeedStep technology  ? 
Execute disable bit  ? 
Extended Halt state
MMX
SSE
SSE2
SSE3
SSSE3
Thermal Monitor 2
Virtualization technology (VT-x)
Core voltage  ? 0.85V - 1.5V
Case temperature  ? 61.4°C
Thermal Design Power  ? 65 Watt