Intel Core i7-2700K vs Intel Core i5-661

Comparative analysis of Intel Core i7-2700K and Intel Core i5-661 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, Graphics interfaces, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, 3DMark Fire Strike - Physics Score, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s).

Intel Core i7-2700K

Intel Core i5-661

Differences

Reasons to consider the Intel Core i7-2700K

CPU is newer: launch date 1 year(s) 8 month(s) later
Processor is unlocked, an unlocked multiplier allows for easier overclocking
2 more cores, run more applications at once: 4 vs 2
4 more threads: 8 vs 4
Around 8% higher clock speed: 3.90 GHz vs 3.60 GHz
Around 4% higher maximum core temperature: 72.6°C vs 69.8°C
2x more L1 cache, more data can be stored in the L1 cache for quick access later
2x more L2 cache, more data can be stored in the L2 cache for quick access later
2x more L3 cache, more data can be stored in the L3 cache for quick access later
Around 95% higher maximum memory size: 32 GB vs 16.38 GB
Around 26% better performance in PassMark - Single thread mark: 1823 vs 1448
2.3x better performance in PassMark - CPU mark: 5742 vs 2470
Around 63% better performance in Geekbench 4 - Single Core: 846 vs 518
2.7x better performance in Geekbench 4 - Multi-Core: 3277 vs 1214

Specifications (specs)
Launch date	October 2011 vs January 2010
Unlocked	Unlocked vs Locked
Number of cores	4 vs 2
Number of threads	8 vs 4
Maximum frequency	3.90 GHz vs 3.60 GHz
Maximum core temperature	72.6°C vs 69.8°C
L1 cache	64 KB (per core) vs 64 KB (per core)
L2 cache	256 KB (per core) vs 256 KB (per core)
L3 cache	8192 KB (shared) vs 4096 KB (shared)
Maximum memory size	32 GB vs 16.38 GB
Benchmarks
PassMark - Single thread mark	1823 vs 1448
PassMark - CPU mark	5742 vs 2470
Geekbench 4 - Single Core	846 vs 518
Geekbench 4 - Multi-Core	3277 vs 1214

Reasons to consider the Intel Core i5-661

Around 9% lower typical power consumption: 87 Watt vs 95 Watt

Thermal Design Power (TDP)	87 Watt vs 95 Watt

Compare benchmarks

CPU 1: Intel Core i7-2700K
CPU 2: Intel Core i5-661

PassMark - Single thread mark

CPU 1

CPU 2

1823

1448

PassMark - CPU mark

CPU 1

CPU 2

5742

2470

Geekbench 4 - Single Core

CPU 1

CPU 2

846

518

Geekbench 4 - Multi-Core

CPU 1

CPU 2

3277

1214

Name	Intel Core i7-2700K	Intel Core i5-661
PassMark - Single thread mark	1823	1448
PassMark - CPU mark	5742	2470
Geekbench 4 - Single Core	846	518
Geekbench 4 - Multi-Core	3277	1214
3DMark Fire Strike - Physics Score	3461
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	4.472
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	66.305
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.557
CompuBench 1.5 Desktop - Video Composition (Frames/s)	1.632
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	4.935

Compare specifications (specs)

	Intel Core i7-2700K	Intel Core i5-661
Essentials
Architecture codename	Sandy Bridge	Clarkdale
Launch date	October 2011	January 2010
Launch price (MSRP)	$514	$252
Place in performance rating	2242	2243
Price now	$288.99	$99.99
Processor Number	i7-2700K	i5-661
Series	Legacy Intel® Core™ Processors	Legacy Intel® Core™ Processors
Status	Discontinued	Discontinued
Value for money (0-100)	8.88	9.35
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	3.50 GHz	3.33 GHz
Bus Speed	5 GT/s DMI	2.5 GT/s DMI
Die size	216 mm	81 mm2
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	8192 KB (shared)	4096 KB (shared)
Manufacturing process technology	32 nm	32 nm
Maximum core temperature	72.6°C	69.8°C
Maximum frequency	3.90 GHz	3.60 GHz
Number of cores	4	2
Number of threads	8	4
Transistor count	1160 million	382 million
Unlocked
VID voltage range		0.6500V-1.4000V
Memory
Max memory channels	2	2
Maximum memory bandwidth	21 GB/s	21 GB/s
Maximum memory size	32 GB	16.38 GB
Supported memory types	DDR3 1066/1333	DDR3 1066/1333
Graphics
Device ID	0x112
Graphics base frequency	850 MHz	900 MHz
Graphics max dynamic frequency	1.35 GHz
Graphics max frequency	1.35 GHz
Intel® Clear Video HD technology
Intel® Flexible Display Interface (Intel® FDI)
Intel® InTru™ 3D technology
Intel® Quick Sync Video
Processor graphics	Intel® HD Graphics 3000	Intel HD Graphics
Graphics interfaces
Number of displays supported	2	2
Wireless Display (WiDi) support
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	1
Package Size	37.5mm x 37.5mm	37.5mm x 37.5mm
Sockets supported	LGA1155	FCLGA1156
Thermal Design Power (TDP)	95 Watt	87 Watt
Peripherals
Max number of PCIe lanes	16	16
PCI Express revision	2.0	2.0
PCIe configurations		1x16, 2x8
Security & Reliability
Execute Disable Bit (EDB)
Intel® Identity Protection technology
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Flexible Display interface (FDI)
Idle States
Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX	Intel® SSE4.2
Intel 64
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Fast Memory Access
Intel® Flex Memory Access
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Thermal Monitoring
Intel® Demand Based Switching
Physical Address Extensions (PAE)		36-bit
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)