i7-4940MX vs i7-7820X

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Aggregate performance score

Core i7-7820X
2017
8 cores / 16 threads, 140 Watt
10.81
+151%
Core i7-4940MX
2014
4 cores / 8 threads, 57 Watt
4.30

Core i7-7820X outperforms Core i7-4940MX by a whopping 151% based on our aggregate benchmark results.

Primary details

Comparing Core i7-7820X and Core i7-4940MX processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking7241367
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.45no data
Market segmentDesktop processorLaptop
SeriesIntel Core i7Intel Core i7
Power efficiency7.317.14
Architecture codenameSkylake (server) (2017−2018)Haswell (2013−2015)
Release date30 May 2017 (7 years ago)20 January 2014 (10 years ago)
Launch price (MSRP)$599$1,096

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i7-7820X and Core i7-4940MX 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 cores8 (Octa-Core)4 (Quad-Core)
Threads168
Base clock speed3.6 GHz3.1 GHz
Boost clock speed4.5 GHz4 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/s5 GT/s
Multiplier36no data
L1 cache512 KB64K (per core)
L2 cache8 MB256K (per core)
L3 cache11 MB (shared)8 MB (shared)
Chip lithography14 nm22 nm
Die sizeno data177 mm2
Maximum core temperature99 °C100 °C
Maximum case temperature (TCase)72 °C100 °C
Number of transistorsno data1,400 million
64 bit support++
Windows 11 compatibility+-
Unlocked multiplier++

Compatibility

Information on Core i7-7820X and Core i7-4940MX 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 configuration1 (Uniprocessor)1
SocketFCLGA2066FCPGA946
Power consumption (TDP)140 Watt57 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-7820X and Core i7-4940MX. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI++
AVX++
vProno data+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX++
Idle Statesno data+
Thermal Monitoring-+
Turbo Boost Max 3.0+no data
FDIno data+

Security technologies

Core i7-7820X and Core i7-4940MX technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDB++
Secure Keyno data+
Identity Protection-+
Anti-Theftno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-7820X and Core i7-4940MX are enumerated here.

AMD-V-+
VT-d++
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-7820X and Core i7-4940MX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-2666DDR3
Maximum memory size128 GB32 GB
Max memory channels42
Maximum memory bandwidth85.33 GB/s25.6 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/AIntel HD Graphics 4600
Max video memoryno data1.7 GB
Quick Sync Video-+
Clear Video HDno data+
Graphics max frequencyno data1.35 GHz
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Core i7-7820X and Core i7-4940MX integrated GPUs.

Number of displays supportedno data3
eDPno data+
DisplayPort-+
HDMI-+
VGAno data+

Peripherals

Specifications and connection of peripherals supported by Core i7-7820X and Core i7-4940MX.

PCIe version3.03
PCI Express lanes2816

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.

i7-7820X 10.81
+151%
i7-4940MX 4.30

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.

i7-7820X 17166
+151%
i7-4940MX 6832

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.

i7-7820X 1426
+14.9%
i7-4940MX 1241

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.

i7-7820X 7862
+95.8%
i7-4940MX 4016

Gaming performance

Pros & cons summary


Performance score 10.81 4.30
Recency 30 May 2017 20 January 2014
Physical cores 8 4
Threads 16 8
Chip lithography 14 nm 22 nm
Power consumption (TDP) 140 Watt 57 Watt

i7-7820X has a 151.4% higher aggregate performance score, an age advantage of 3 years, 100% more physical cores and 100% more threads, and a 57.1% more advanced lithography process.

i7-4940MX, on the other hand, has 145.6% lower power consumption.

The Core i7-7820X is our recommended choice as it beats the Core i7-4940MX in performance tests.

Note that Core i7-7820X is a desktop processor while Core i7-4940MX is a notebook one.


Should you still have questions on choice between Core i7-7820X and Core i7-4940MX, ask them in Comments section, and we shall answer.

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Intel Core i7-7820X
Core i7-7820X
Intel Core i7-4940MX
Core i7-4940MX

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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4.1 85 votes

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Questions & comments

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