i9-13900KS vs EPYC 7643

Primary details

Comparing EPYC 7643 and Core i9-13900KS processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	38	73
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	6.32	52.70
Market segment	Server	Desktop processor
Series	AMD EPYC	no data
Power efficiency	20.14	24.47
Architecture codename	Milan (2021−2023)	Raptor Lake-S (2023−2024)
Release date	12 January 2021 (3 years ago)	12 January 2023 (1 year ago)
Launch price (MSRP)	$4,995	$699

Cost-effectiveness evaluation

Performance per price, higher is better.

i9-13900KS has 734% better value for money than EPYC 7643.

Detailed specifications

EPYC 7643 and Core i9-13900KS 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	48 (Octatetraconta-Core)	24 (Tetracosa-Core)
Threads	96	32
Base clock speed	2.3 GHz	3.2 GHz
Boost clock speed	3.6 GHz	5.8 GHz
Multiplier	23	no data
L1 cache	3 MB	80K (per core)
L2 cache	24 MB	2 MB (per core)
L3 cache	256 MB (shared)	36 MB (shared)
Chip lithography	7 nm+	Intel 7 nm
Die size	8x 81 mm2	257 mm2
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	33,200 million	no data
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	-	+

Compatibility

Information on EPYC 7643 and Core i9-13900KS 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	1
Socket	SP3	FCLGA1700
Power consumption (TDP)	225 Watt	150 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7643 and Core i9-13900KS. 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 7643 and Core i9-13900KS 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 7643 and Core i9-13900KS 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 7643 and Core i9-13900KS. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5-5600, DDR4-3200
Maximum memory size	4 TiB	192 GB
Max memory channels	no data	2
Maximum memory bandwidth	204.795 GB/s	89.6 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	N/A	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 7643 and Core i9-13900KS integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by EPYC 7643 and Core i9-13900KS 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 7643 and Core i9-13900KS 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 7643 and Core i9-13900KS.

PCIe version	4.0	5.0 and 4.0
PCI Express lanes	128	20

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	49.69	40.25
Recency	12 January 2021	12 January 2023
Physical cores	48	24
Threads	96	32
Power consumption (TDP)	225 Watt	150 Watt

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Should you still have questions on choice between EPYC 7643 and Core i9-13900KS, ask them in Comments section, and we shall answer.

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