Ryzen 9 7945HX3D vs i9-11900KF

Place in the ranking	423	95
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Laptop
Series	no data	AMD Dragon Range (Zen 4, Ryzen 7045)
Power efficiency	11.92	62.60
Architecture codename	Rocket Lake (2021)	Dragon Range-HX (Zen 4) (2023−2024)
Release date	16 March 2021 (3 years ago)	27 July 2023 (1 year ago)

Detailed specifications

Core i9-11900KF and Ryzen 9 7945HX3D 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	3.5 GHz	2.3 GHz
Boost clock speed	5.2 GHz	5.4 GHz
Bus rate	8 GT/s	no data
L1 cache	64K (per core)	64 KB (per core)
L2 cache	256K (per core)	1 MB (per core)
L3 cache	16 MB (shared)	128 MB (shared)
Chip lithography	14 nm	5 nm
Die size	no data	2x 71 mm²
Maximum core temperature	100 °C	89 °C
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	no data	17,840 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	+

Compatibility

Information on Core i9-11900KF and Ryzen 9 7945HX3D 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	1
Socket	FCLGA1200	FL1
Power consumption (TDP)	125 Watt	55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-11900KF and Ryzen 9 7945HX3D. 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 Ryzen 9 7945HX3D 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 Ryzen 9 7945HX3D 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 Ryzen 9 7945HX3D. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5-5200
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

AMD Radeon 610M

Peripherals

Specifications and connection of peripherals supported by Core i9-11900KF and Ryzen 9 7945HX3D.

PCIe version	4.0	5.0
PCI Express lanes	20	28

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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.

i9-11900KF 16.34

Ryzen 9 7945HX3D 37.76
+131%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i9-11900KF 24999

Ryzen 9 7945HX3D 57793
+131%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i9-11900KF 2328

Ryzen 9 7945HX3D 2769
+18.9%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i9-11900KF 10055

Ryzen 9 7945HX3D 16424
+63.3%

Gaming performance

Pros & cons summary

Performance score	16.34	37.76
Recency	16 March 2021	27 July 2023
Physical cores	8	16
Threads	16	32
Chip lithography	14 nm	5 nm
Power consumption (TDP)	125 Watt	55 Watt

Ryzen 9 7945HX3D has a 131.1% higher aggregate performance score, an age advantage of 2 years, 100% more physical cores and 100% more threads, a 180% more advanced lithography process, and 127.3% lower power consumption.

The Ryzen 9 7945HX3D is our recommended choice as it beats the Core i9-11900KF in performance tests.

Note that Core i9-11900KF is a desktop processor while Ryzen 9 7945HX3D is a notebook one.

Should you still have questions on choice between Core i9-11900KF and Ryzen 9 7945HX3D, ask them in Comments section, and we shall answer.