i9-11900KF vs Ryzen 9 3950X

Primary details

Comparing Ryzen 9 3950X and Core i9-11900KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	210	437
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	18.77	no data
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 9	no data
Power efficiency	21.98	11.89
Architecture codename	Matisse (Zen 2) (2019−2020)	Rocket Lake (2021)
Release date	14 November 2019 (5 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$799	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 3950X and Core i9-11900KF 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	16 (Hexadeca-Core)	8 (Octa-Core)
Threads	32	16
Base clock speed	3.5 GHz	3.5 GHz
Boost clock speed	4.7 GHz	5.2 GHz
Bus rate	no data	8 GT/s
L1 cache	96K (per core)	64K (per core)
L2 cache	512K (per core)	256K (per core)
L3 cache	64 MB	16 MB (shared)
Chip lithography	7 nm, 12 nm	14 nm
Die size	2 x 72 mm + 125 mm (IO-Die) mm2	no data
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	19,200 million	no data
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	+

Compatibility

Information on Ryzen 9 3950X and Core i9-11900KF 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 (Uniprocessor)	1
Socket	AM4	FCLGA1200
Power consumption (TDP)	105 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3950X and Core i9-11900KF. You'll probably need this information if you require some particular technology.

Instruction set extensions	86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	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	+
Precision Boost 2	+	no data
Deep Learning Boost	-	+

Security technologies

Ryzen 9 3950X and Core i9-11900KF technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	no data	+
Secure Key	no data	+
Identity Protection	-	+
SGX	no data	-
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3950X and Core i9-11900KF 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 Ryzen 9 3950X and Core i9-11900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR4-3200
Maximum memory size	128 GB	128 GB
Max memory channels	no data	2
Maximum memory bandwidth	51.196 GB/s	50 GB/s
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3950X and Core i9-11900KF.

PCIe version	no data	4.0
PCI Express lanes	no data	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	24.37	15.70
Recency	14 November 2019	16 March 2021
Physical cores	16	8
Threads	32	16
Chip lithography	7 nm	14 nm
Power consumption (TDP)	105 Watt	125 Watt

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Should you still have questions on choice between Ryzen 9 3950X and Core i9-11900KF, ask them in Comments section, and we shall answer.

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