EPYC 9845 vs i9-11900KF

Primary details

Comparing Core i9-11900KF and EPYC 9845 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	438	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Power efficiency	11.86	no data
Architecture codename	Rocket Lake (2021)	Turin (2024)
Release date	16 March 2021 (3 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	no data	$13,564

Detailed specifications

Core i9-11900KF and EPYC 9845 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)	160
Threads	16	320
Base clock speed	3.5 GHz	2.1 GHz
Boost clock speed	5.2 GHz	3.7 GHz
Bus rate	8 GT/s	no data
L1 cache	64K (per core)	80 KB (per core)
L2 cache	256K (per core)	1 MB (per core)
L3 cache	16 MB (shared)	320 MB (shared)
Chip lithography	14 nm	3 nm
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	no data
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	-

Compatibility

Information on Core i9-11900KF and EPYC 9845 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	2
Socket	FCLGA1200	SP5
Power consumption (TDP)	125 Watt	390 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-11900KF and EPYC 9845. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	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	+	-
Turbo Boost Max 3.0	+	no data
Precision Boost 2	no data	+
Deep Learning Boost	+	-

Security technologies

Core i9-11900KF and EPYC 9845 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 Core i9-11900KF and EPYC 9845 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 i9-11900KF and EPYC 9845. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5
Maximum memory size	128 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	50 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 i9-11900KF and EPYC 9845.

PCIe version	4.0	5.0
PCI Express lanes	20	128

Pros & cons summary

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Recency	16 March 2021	10 October 2024
Physical cores	8	160
Threads	16	320
Chip lithography	14 nm	3 nm
Power consumption (TDP)	125 Watt	390 Watt

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Should you still have questions on choice between Core i9-11900KF and EPYC 9845, ask them in Comments section, and we shall answer.

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