i7-11700K vs i5-661

VS

Aggregate performance score

Core i5-661
2010
2 cores / 4 threads, 87 Watt
1.56
Core i7-11700K
2021
8 cores / 16 threads, 125 Watt
15.46
+891%

Core i7-11700K outperforms Core i5-661 by a whopping 891% based on our aggregate benchmark results.

Primary details

Comparing Core i5-661 and Core i7-11700K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking2124451
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation0.12no data
Market segmentDesktop processorDesktop processor
Seriesno dataIntel Core i7
Power efficiency1.7011.70
Architecture codenameClarkdale (2010−2011)Rocket Lake (2021)
Release date7 January 2010 (14 years ago)16 March 2021 (3 years ago)
Launch price (MSRP)$252no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i5-661 and Core i7-11700K basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores2 (Dual-core)8 (Octa-Core)
Threads416
Base clock speed3.33 GHz3.6 GHz
Boost clock speed3.6 GHz5 GHz
Bus rate2.5 GT/s8 GT/s
L1 cache64 KB (per core)64K (per core)
L2 cache256 KB (per core)512K (per core)
L3 cache4 MB (shared)16 MB (shared)
Chip lithography32 nm14 nm
Die size81 mm2no data
Maximum core temperature70 °C100 °C
Maximum case temperature (TCase)no data72 °C
Number of transistors382 millionno data
64 bit support++
Windows 11 compatibility-+
Unlocked multiplier-+

Compatibility

Information on Core i5-661 and Core i7-11700K compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration11
SocketFCLGA1156FCLGA1200
Power consumption (TDP)87 Watt125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-661 and Core i7-11700K. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI++
FMA-+
AVX-+
vProno data+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology1.02.0
Hyper-Threading Technology++
TSX-+
Idle States++
Thermal Monitoring-+
SIPP-+
Demand Based Switching-no data
PAE36 Bitno data
Turbo Boost Max 3.0no data+
FDI+no data
Deep Learning Boost-+

Security technologies

Core i5-661 and Core i7-11700K technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++
Secure Keyno data+
Identity Protection-+
SGXno data-
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-661 and Core i7-11700K are enumerated here.

VT-d++
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-661 and Core i7-11700K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR4
Maximum memory size16.38 GB128 GB
Max memory channels22
Maximum memory bandwidth21 GB/s50 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel HD Graphics for Previous Generation Intel ProcessorsIntel UHD Graphics 750
Max video memoryno data64 GB
Quick Sync Video-+
Clear Videono data+
Clear Video HD++
Graphics max frequencyno data1.3 GHz
Execution Unitsno data32
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Core i5-661 and Core i7-11700K integrated GPUs.

Number of displays supported23

Graphics image quality

Maximum display resolutions supported by Core i5-661 and Core i7-11700K integrated GPUs, including resolutions over different interfaces.

4K resolution supportno data+
Max resolution over HDMI 1.4no data4096x2160@60Hz
Max resolution over eDPno data5120 x 3200 @60Hz
Max resolution over DisplayPortno data5120 x 3200 @60Hz

Graphics API support

APIs supported by Core i5-661 and Core i7-11700K integrated GPUs, sometimes API versions are included.

DirectXno data12.1
OpenGLno data4.5

Peripherals

Specifications and connection of peripherals supported by Core i5-661 and Core i7-11700K.

PCIe version2.04.0
PCI Express lanes1620

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

i5-661 1.56
i7-11700K 15.46
+891%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i5-661 2471
i7-11700K 24551
+894%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i5-661 483
i7-11700K 2250
+366%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i5-661 953
i7-11700K 9878
+937%

Gaming performance

Pros & cons summary


Performance score 1.56 15.46
Integrated graphics card 0.77 4.50
Recency 7 January 2010 16 March 2021
Physical cores 2 8
Threads 4 16
Chip lithography 32 nm 14 nm
Power consumption (TDP) 87 Watt 125 Watt

i5-661 has 43.7% lower power consumption.

i7-11700K, on the other hand, has a 891% higher aggregate performance score, 484.4% faster integrated GPU, an age advantage of 11 years, 300% more physical cores and 300% more threads, and a 128.6% more advanced lithography process.

The Core i7-11700K is our recommended choice as it beats the Core i5-661 in performance tests.


Should you still have questions on choice between Core i5-661 and Core i7-11700K, ask them in Comments section, and we shall answer.

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Intel Core i5-661
Core i5-661
Intel Core i7-11700K
Core i7-11700K

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Community ratings

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Questions & comments

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