i9-14900KS vs i7-8557U

Primary details

Comparing Core i7-8557U and Core i9-14900KS processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1284	69
Place by popularity	not in top-100	8
Market segment	Laptop	Desktop processor
Series	Intel Core i7	no data
Power efficiency	15.62	24.78
Architecture codename	Coffee Lake-U (2018−2019)	Raptor Lake-R (2023−2024)
Release date	16 July 2019 (5 years ago)	March 2024 (recently)
Launch price (MSRP)	no data	$689

Detailed specifications

Core i7-8557U and Core i9-14900KS 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 cores	4 (Quad-Core)	24 (Tetracosa-Core)
Threads	8	32
Base clock speed	1.7 GHz	3.2 GHz
Boost clock speed	4.5 GHz	5.9 GHz
Bus rate	4 GT/s	no data
L1 cache	256 KB	80 KB (per core)
L2 cache	1 MB	2 MB (per core)
L3 cache	8 MB	36 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Die size	no data	257 mm2
Maximum core temperature	100 °C	100 °C
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	-	+

Compatibility

Information on Core i7-8557U and Core i9-14900KS 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 configuration	1	1
Socket	FCBGA1528	FCLGA1700
Power consumption (TDP)	15 Watt	150 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-8557U and Core i9-14900KS. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
eDRAM	128 MB	no data
Speed Shift	+	+
My WiFi	+	no data
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	-	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
Turbo Boost Max 3.0	no data	+
Deep Learning Boost	-	+

Security technologies

Core i7-8557U and Core i9-14900KS technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+
Secure Key	+	+
MPX	+	-
Identity Protection	+	-
SGX	Yes with Intel® ME	no data
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-8557U and Core i9-14900KS 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 i9-14900KS. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR5-5600, DDR4-3200
Maximum memory size	32 GB	192 GB
Max memory channels	2	2
Maximum memory bandwidth	37.5 GB/s	89.6 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel Iris Plus Graphics 645	Intel UHD Graphics 770
Max video memory	32 GB	no data
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	+
Graphics max frequency	1.15 GHz	1.65 GHz
Execution Units	no data	32
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i7-8557U and Core i9-14900KS integrated GPUs.

Number of displays supported	3	4
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
DVI	+	no data

Graphics image quality

Maximum display resolutions supported by Core i7-8557U and Core i9-14900KS integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096 x 2304@30Hz	4096 x 2160 @ 60Hz
Max resolution over eDP	4096 x 2304@60Hz	5120 x 3200 @ 120Hz
Max resolution over DisplayPort	4096 x 2304@60Hz	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i7-8557U and Core i9-14900KS integrated GPUs, sometimes API versions are included.

DirectX	12	12
OpenGL	4.5	4.5

Peripherals

Specifications and connection of peripherals supported by Core i7-8557U and Core i9-14900KS.

PCIe version	3.0	5.0 and 4.0
PCI Express lanes	16	16

Synthetic benchmark performance

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

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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.

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Pros & cons summary

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Performance score	4.62	39.28
Integrated graphics card	4.45	6.15
Physical cores	4	24
Threads	8	32
Power consumption (TDP)	15 Watt	150 Watt

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Should you still have questions on choice between Core i7-8557U and Core i9-14900KS, ask them in Comments section, and we shall answer.

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