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Intel Core i5 661 Review



Intel® Core™ i5-6X1 Series
Intel® Turbo Boost Technology
Intel® Hyper-Threading Technology
Intel® Smart Cache
4 MB L3 shared
Integrated Memory Controller
Number of Memory Channels
2 (DDR3 1333 MHz)
Intel® Graphics Technology
Graphics Core Frequency
Intel® vPro™ Technology
Intel® Virtualization Technology (Intel® VT-x)
Intel® Virtualization Technology for Directed I/O
(Intel® VT-d)
Intel® Trusted Execution Technology (Intel® TXT)
AES New Instructions (AES-NI)
Intel® Express Chipset
Intel® 5 Series

Category Features
LGA 775 Processor
+Intel® G45/GM45
New 2010 Intel® Core Processors
+ Intel® 5 Series Chipset
Unified Shader Architecture
2nd Generation
3rd Generation
Execution Units (EUs)
10 EUs
12 EUs
HW Vertex Processing
Enhanced with clip/cull/setup
Hierarchical Z and Fast Z Clear
Targeted OS Optimizations
Windows Vista/XP
Windows 7/Vista/XP
3D Performance
Core Frequency
Up to 800 MHz
Up to 900 MHz
Maximum Video Memory
Up to 1.7 GB
Up to 1.7 GB
DirectX Support
Open GL Support
Open GL 2.0
Open GL 2.1
Shader Model Support
SM 4.0
SM 4.0
Dynamic Frequency
Yes (mobile only)
Maximum Resolution
2560 x 1600
2560 x 1600
Dual Simultaneous HDMI1 Support


  • Dual-Core Processing: Runs two independent processor cores in one physical package at the same frequency.
  • Intel® Smart Cache :The shared cache is dynamically allocated to each processor core, based on workload. This efficient, dual-core-optimized implementation increases the probability that each core can access data from the fast cache, significantly reducing latency to frequently used data and improving performance.
  • Intel® Turbo Boost Technology1 Dynamically increases the processor's frequency as needed by taking advantage of thermal and power headroom when operating below specified limits. Get more performance automatically, when you need it the most.
  • Intel® Hyper-Threading Technology (Intel® HT Technology): Delivers two processing threads per physical core for a total of four threads for massive computational throughput. With Intel® HT Technology, highly threaded applications can get more work done in parallel, completing their tasks sooner. With more threads available to the operating system, multitasking becomes even easier. This amazing processor can handle multiple applications working simultaneously, allowing you to do more with less wait time.
  • Integrated Memory Controller: An integrated memory controller offers stunning memory read/write performance through efficient prefetching algorithms, lower latency, and higher memory bandwidth.
  • Intel® Graphics Media Accelerator HD (Intel® GMA HD): Enhanced video and 3D engine delivers smooth HD video playback and mainstream 3D gaming without the need for add-in video cards or decoders. Intel® GMA HD provides a suite of video processing, 3D, and software technologies designed to improve image quality and performance, including hardware-accelerated decode for Blu-ray* dual-stream picture-in-picture and 3D support for Microsoft* DirectX* 10 and OpenGL* 2.1. Supports full functionality of the Microsoft* Windows* 7 operating system and display connectivity options, including HDMI* and DisplayPort*. Enables professional-grade audio capabilities with support for Dolby* TrueHD  and DTS*-HD Master Audio multi-channel bitstreaming.
  • Intel® Virtualization Technology (Intel® VT-x): and Intel® Virtualization Technology for Directed I/O (Intel® VT-d) Intel® VT allows one hardware platform to function as multiple “virtual” platforms. For businesses, Intel VT offers improved manageability, limiting downtime and
    maintaining worker productivity by isolating computing activities into separate partitions.
  • Advanced Encryption Standard New Instructions (AES-NI): New AES instructions add hardware acceleration to AES algorithms and speeds up the execution of AES applications.
  • Intel® Trusted Execution Technology (Intel® TXT):  Highly versatile set of hardware extensions for Intel® processors and chipsets which, with appropriate software, enhance platform security capabilities.
  • Intel®-Designed Thermal Solution for Boxed Processors:  Includes a four-pin connector for fan speed control to help minimize the acoustic noise levels generated from running the fan at higher speeds for thermal performance2. Fan speed control technology is based on actual processor temperature and power usage.

  1. Introduction & Closer Look
  2. Closer Look (Continued)
  3. Closer Look: New Control Panel
  4. Specifications & Features
  5. Testing: Setup & Overclocking
  6. Testing: Apophysis, WinRAR
  7. Testing: Office 2007, POV Ray, PCMark Vantage
  8. Testing: SiSoft Sandra
  9. Testing: Sciencemark, Cinebench 10, HDTune
  10. Testing: Additional testing
  11. Testing: Far Cry 2
  12. Testing: Crysis Warhead
  13. Testing: Bioshock
  14. Testing: Call of Duty World at War
  15. Testing: Dead Space
  16. Testing: Fallout 3
  17. Testing: Left 4 Dead
  18. Testing: 3DMark06
  19. Testing: 3DMark Vantage
  20. Conclusion
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