i7-14700KF vs i7-8557U

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Aggregate performance score

Core i7-8557U
2019
4 cores / 8 threads, 15 Watt
4.80
Core i7-14700KF
2023
20 cores / 28 threads, 125 Watt
34.94
+628%

Core i7-14700KF outperforms Core i7-8557U by a whopping 628% based on our aggregate benchmark results.

Primary details

Comparing Core i7-8557U and Core i7-14700KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1279111
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data83.53
Market segmentLaptopDesktop processor
SeriesIntel Core i7no data
Power efficiency15.6325.49
Architecture codenameCoffee Lake-U (2018−2019)Raptor Lake-R (2023−2024)
Release date16 July 2019 (5 years ago)17 October 2023 (1 year ago)
Launch price (MSRP)no data$384

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i7-8557U and Core i7-14700KF 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)20 (Icosa-Core)
Threads828
Base clock speed1.7 GHz3.4 GHz
Boost clock speed4.5 GHz5.6 GHz
Bus rate4 GT/sno data
L1 cache256 KB80 KB (per core)
L2 cache1 MB2 MB (per core)
L3 cache8 MB33 MB (shared)
Chip lithography14 nmIntel 7 nm
Die sizeno data257 mm2
Maximum core temperature100 °C100 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplier-+

Compatibility

Information on Core i7-8557U and Core i7-14700KF 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
SocketFCBGA1528FCLGA1700
Power consumption (TDP)15 Watt125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-8557U and Core i7-14700KF. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
eDRAM128 MBno data
Speed Shift++
My WiFi+no data
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX-+
Idle States++
Thermal Monitoring++
Flex Memory Access+no data
Turbo Boost Max 3.0no data+
Deep Learning Boost-+

Security technologies

Core i7-8557U and Core i7-14700KF technologies aimed at improving security, for example, by protecting against hacks.

TXT-+
EDB++
Secure Key++
MPX+-
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-8557U and Core i7-14700KF are enumerated here.

AMD-V+-
VT-d++
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-8557U and Core i7-14700KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR5-5600, DDR4-3200
Maximum memory size32 GB192 GB
Max memory channels22
Maximum memory bandwidth37.5 GB/s89.6 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel Iris Plus Graphics 645N/A
Max video memory32 GBno data
Quick Sync Video+-
Clear Video+no data
Clear Video HD+no data
Graphics max frequency1.15 GHzno data
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i7-8557U and Core i7-14700KF integrated GPUs.

Number of displays supported3no data
eDP+no data
DisplayPort+-
HDMI+-
DVI+no data

Graphics image quality

Maximum display resolutions supported by Core i7-8557U and Core i7-14700KF integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096 x 2304@30Hzno data
Max resolution over eDP4096 x 2304@60Hzno data
Max resolution over DisplayPort4096 x 2304@60Hzno data

Graphics API support

APIs supported by Core i7-8557U and Core i7-14700KF integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core i7-8557U and Core i7-14700KF.

PCIe version3.05.0 and 4.0
PCI Express lanes1616

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.

i7-8557U 4.80
i7-14700KF 34.94
+628%

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.

i7-8557U 7342
i7-14700KF 53478
+628%

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.

i7-8557U 974
i7-14700KF 2994
+207%

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.

i7-8557U 3455
i7-14700KF 19565
+466%

Gaming performance

Pros & cons summary


Performance score 4.80 34.94
Recency 16 July 2019 17 October 2023
Physical cores 4 20
Threads 8 28
Power consumption (TDP) 15 Watt 125 Watt

i7-8557U has 733.3% lower power consumption.

i7-14700KF, on the other hand, has a 627.9% higher aggregate performance score, an age advantage of 4 years, and 400% more physical cores and 250% more threads.

The Core i7-14700KF is our recommended choice as it beats the Core i7-8557U in performance tests.

Be aware that Core i7-8557U is a notebook processor while Core i7-14700KF is a desktop one.


Should you still have questions on choice between Core i7-8557U and Core i7-14700KF, ask them in Comments section, and we shall answer.

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


Intel Core i7-8557U
Core i7-8557U
Intel Core i7-14700KF
Core i7-14700KF

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Community ratings

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Questions & comments

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