Ryzen 9 5900XT vs i9-9900KF

Primary details

Comparing Core i9-9900KF and Ryzen 9 5900XT processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	674	165
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	8.21	67.22
Market segment	Desktop processor	Desktop processor
Series	Intel Core i9	no data
Power efficiency	11.46	25.30
Architecture codename	Coffee Lake-R (2018−2019)	Vermeer (2020−2024)
Release date	7 January 2019 (5 years ago)	31 July 2024 (less than a year ago)
Launch price (MSRP)	$488	$349

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 5900XT has 719% better value for money than i9-9900KF.

Detailed specifications

Core i9-9900KF and Ryzen 9 5900XT 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)	16 (Hexadeca-Core)
Threads	16	32
Base clock speed	3.6 GHz	3.3 GHz
Boost clock speed	5 GHz	4.8 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
L1 cache	512 KB	64 KB (per core)
L2 cache	2 MB	512 KB (per core)
L3 cache	16 MB (shared)	64 MB
Chip lithography	14 nm	7 nm
Die size	no data	2x 74 mm2
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	no data	8,300 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	+

Compatibility

Information on Core i9-9900KF and Ryzen 9 5900XT 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	FCLGA1151	AM4
Power consumption (TDP)	95 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900KF and Ryzen 9 5900XT. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i9-9900KF and Ryzen 9 5900XT technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9900KF and Ryzen 9 5900XT 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 Core i9-9900KF and Ryzen 9 5900XT. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR4
Maximum memory size	128 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	42.671 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Core i9-9900KF and Ryzen 9 5900XT.

PCIe version	3.0	4.0
PCI Express lanes	16	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	11.72	28.60
Recency	7 January 2019	31 July 2024
Physical cores	8	16
Threads	16	32
Chip lithography	14 nm	7 nm
Power consumption (TDP)	95 Watt	105 Watt

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Should you still have questions on choice between Core i9-9900KF and Ryzen 9 5900XT, ask them in Comments section, and we shall answer.

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