Intel® Core™ i5 Processor I5-661
- Socket
 LGA1156
- Architecture
 32 nm
 process technology
- L3 Cache
 4 MB
- Clock Speed
3.33 GHz
- Features
  Dual Core
  Enhanced Intel Speedstep® Technology
  Hyper-Threading Technology 
  Intel® EM64T 
  Intel® Virtualization Technology
  Enhanced Halt State (C1E)
  Execute Disable Bit 
 
Supports 
 DDR3 memory speeds up to 1333 MHz
Integrated Graphics ( The integrated graphics frequency is 
 900
 MHz. )
 Intel SSE4.1 and SSE4.2 enabled. 
 
Intel® AES-NI enabled. 
Max Intel® Turbo Boost Technology Frequency (GHz): 2 core: 3.46 GHz, 1 core: 3.60 GHz