Product Collection
Legacy Intel® Core™ Processors
Vertical Segment
Desktop
Processor Number
i5-661
Lithography
32 nm

CPU Specifications

Total Cores
2
Total Threads
4
Max Turbo Frequency
3.60 GHz
Processor Base Frequency
3.33 GHz
Cache
4 MB Intel® Smart Cache
Bus Speed
2.5 GT/s
TDP
87 W

Supplemental Information

Marketing Status
Discontinued
Launch Date
Q1'10
Servicing Status
End of Servicing Lifetime
Embedded Options Available
No
Datasheet

Memory Specifications

Max Memory Size (dependent on memory type)
16.38 GB
Memory Types
DDR3 1066/1333
Max # of Memory Channels
2
Max Memory Bandwidth
21 GB/s
Physical Address Extensions
36-bit

GPU Specifications

GPU Name
Intel® HD Graphics for Previous Generation Intel® Processors
Graphics Base Frequency
900 MHz
Intel® Flexible Display Interface (Intel® FDI)
Yes
Intel® Clear Video HD Technology
Yes
# of Displays Supported
2

Expansion Options

PCI Express Revision
2.0
PCI Express Configurations
1x16, 2x8
Max # of PCI Express Lanes
16

Package Specifications

Sockets Supported
FCLGA1156
Max CPU Configuration
1
TCASE
69.8°C
Package Size
37.5mm x 37.5mm
Processing Die Size
81 mm2
# of Processing Die Transistors
382 million

Advanced Technologies

Intel® Turbo Boost Technology
1.0
Intel® Hyper-Threading Technology
Yes
Intel® 64
Yes
Instruction Set
64-bit
Instruction Set Extensions
Intel® SSE4.2
Idle States
Yes
Enhanced Intel SpeedStep® Technology
Yes
Intel® Demand Based Switching
No
Thermal Monitoring Technologies
No

Security & Reliability

Intel® AES New Instructions
Yes
Intel® Trusted Execution Technology
No
Execute Disable Bit
Yes
Intel® Virtualization Technology (VT-x)
Yes
Intel® VT-x with Extended Page Tables (EPT)
Yes