A8-3870K vs i7-7740X

VS

Aggregate performance score

Core i7-7740X
2017
4 cores / 8 threads, 112 Watt
6.06
+312%
A8-3870K
2011
4 cores / 4 threads, 100 Watt
1.47

Core i7-7740X outperforms A8-3870K by a whopping 312% based on our aggregate benchmark results.

Primary details

Comparing Core i7-7740X and A8-3870K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking11022175
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation2.31no data
Market segmentDesktop processorDesktop processor
SeriesCore i7 (Desktop)no data
Power efficiency5.121.39
Architecture codenameKaby Lake-X (2017)Llano (2011−2012)
Release date26 June 2017 (7 years ago)20 December 2011 (13 years ago)
Launch price (MSRP)$339no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i7-7740X and A8-3870K 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 cores4 (Quad-Core)4 (Quad-Core)
Threads84
Base clock speed4.3 GHz3 GHz
Boost clock speed4.5 GHz3 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
L1 cache64K (per core)128 KB (per core)
L2 cache256K (per core)1 MB (per core)
L3 cache8 MB (shared)0 KB
Chip lithography14 nm32 nm
Die sizeno data228 mm2
Maximum core temperature100 °Cno data
Maximum case temperature (TCase)72 °Cno data
Number of transistorsno data1,178 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplier++

Compatibility

Information on Core i7-7740X and A8-3870K 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
SocketFCLGA2066FM1
Power consumption (TDP)112 Watt100 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-7740X and A8-3870K. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2no data
AES-NI+-
AVX+-
vPro+no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX+-

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-7740X and A8-3870K are enumerated here.

AMD-V++
VT-d+no data
VT-x+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-7740X and A8-3870K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR3
Maximum memory size64 GBno data
Max memory channels2no data
Maximum memory bandwidth42.671 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardHD 630AMD Radeon HD 6550D

Peripherals

Specifications and connection of peripherals supported by Core i7-7740X and A8-3870K.

PCIe version3.0no data
PCI Express lanes16no data

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.

i7-7740X 6.06
+312%
A8-3870K 1.47

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.

i7-7740X 9621
+313%
A8-3870K 2328

Gaming performance

Pros & cons summary


Performance score 6.06 1.47
Recency 26 June 2017 20 December 2011
Threads 8 4
Chip lithography 14 nm 32 nm
Power consumption (TDP) 112 Watt 100 Watt

i7-7740X has a 312.2% higher aggregate performance score, an age advantage of 5 years, 100% more threads, and a 128.6% more advanced lithography process.

A8-3870K, on the other hand, has 12% lower power consumption.

The Core i7-7740X is our recommended choice as it beats the A8-3870K in performance tests.


Should you still have questions on choice between Core i7-7740X and A8-3870K, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core i7-7740X
Core i7-7740X
AMD A8-3870K
A8-3870K

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

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


2.9 64 votes

Rate Core i7-7740X on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4.1 214 votes

Rate A8-3870K on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Core i7-7740X or A8-3870K, agree or disagree with our judgements, or report an error or mismatch.