i9-14900KS vs EPYC 7251

Primary details

Comparing EPYC 7251 and Core i9-14900KS processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	805	69
Place by popularity	not in top-100	8
Cost-effectiveness evaluation	2.79	no data
Market segment	Server	Desktop processor
Series	AMD EPYC	no data
Power efficiency	7.41	24.78
Architecture codename	Naples (2017−2018)	Raptor Lake-R (2023−2024)
Release date	29 June 2017 (7 years ago)	March 2024 (recently)
Launch price (MSRP)	$574	$689

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7251 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	8 (Octa-Core)	24 (Tetracosa-Core)
Threads	16	32
Base clock speed	2.1 GHz	3.2 GHz
Boost clock speed	2.9 GHz	5.9 GHz
Multiplier	21	no data
L1 cache	96K (per core)	80 KB (per core)
L2 cache	512K (per core)	2 MB (per core)
L3 cache	32 MB (shared)	36 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Die size	192 mm2	257 mm2
Maximum core temperature	no data	100 °C
Number of transistors	4,800 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	+	+

Compatibility

Information on EPYC 7251 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	2 (Multiprocessor)	1
Socket	TR4	FCLGA1700
Power consumption (TDP)	120 Watt	150 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7251 and Core i9-14900KS. You'll probably need this information if you require some particular technology.

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

Security technologies

EPYC 7251 and Core i9-14900KS technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	no data	+
Secure Key	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7251 and Core i9-14900KS are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7251 and Core i9-14900KS. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR5-5600, DDR4-3200
Maximum memory size	2 TiB	192 GB
Max memory channels	8	2
Maximum memory bandwidth	153.652 GB/s	89.6 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel UHD Graphics 770
Quick Sync Video	-	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.65 GHz
Execution Units	no data	32

Graphics interfaces

Available interfaces and connections of EPYC 7251 and Core i9-14900KS integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by EPYC 7251 and Core i9-14900KS integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096 x 2160 @ 60Hz
Max resolution over eDP	no data	5120 x 3200 @ 120Hz
Max resolution over DisplayPort	no data	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by EPYC 7251 and Core i9-14900KS integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by EPYC 7251 and Core i9-14900KS.

PCIe version	3.0	5.0 and 4.0
PCI Express lanes	128	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	9.40	39.28
Physical cores	8	24
Threads	16	32
Power consumption (TDP)	120 Watt	150 Watt

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Should you still have questions on choice between EPYC 7251 and Core i9-14900KS, ask them in Comments section, and we shall answer.

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