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Intel Core i9-9940X vs AMD Ryzen 9 3900X

Last updated: 2024-08-07

CPU comparison with benchmarks


Intel Core i9-9940X		AMD Ryzen 9 3900X
CPU comparison Intel Core i9-9940X or AMD Ryzen 9 3900X - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results. The Intel Core i9-9940X has 14 cores with 28 threads and clocks with a maximum frequency of 4.50 GHz. Up to 128 GB of memory is supported in 4 memory channels. The Intel Core i9-9940X was released in Q4/2018. The AMD Ryzen 9 3900X has 12 cores with 24 threads and clocks with a maximum frequency of 4.60 GHz. The CPU supports up to 128 GB of memory in 2 memory channels. The AMD Ryzen 9 3900X was released in Q3/2019.

Intel Core i9 (81)	Family	AMD Ryzen 9 (47)
Intel Core i 9000X (8)	CPU group	AMD Ryzen 3000 (15)
9	Generation	3
Skylake X Refresh	Architecture	Matisse (Zen 2)
Desktop	Segment	Desktop
Intel Core i9-7940X	Predecessor	--
--	Successor	AMD Ryzen 9 5900X

CPU Cores and Base Frequency The Intel Core i9-9940X is a 14 core processor with a clock frequency of 3.30 GHz (4.50 GHz). The AMD Ryzen 9 3900X has 12 CPU cores with a clock frequency of 3.80 GHz (4.60 GHz).
Intel Core i9-9940X	Characteristic	AMD Ryzen 9 3900X
14	Cores	12
28	Threads	24
normal	Core architecture	normal
Yes	Hyperthreading	Yes
Yes	Overclocking ?	Yes
3.30 GHz	Frequency	3.80 GHz
4.50 GHz	Turbo Frequency (1 Core)	4.60 GHz
4.20 GHz	Turbo Frequency (All Cores)	4.00 GHz


NPU AI performance The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.
Intel Core i9-9940X	Characteristic	AMD Ryzen 9 3900X
--	AI hardware	--
--	AI specifications	--
--	NPU + CPU + iGPU	--

Integrated graphics (iGPU) The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.
no iGPU	GPU	no iGPU
	GPU frequency	--
--	GPU (Turbo)	--
--	GPU Generation	--
	Technology
	Max. displays
--	Compute units	--
--	Shader	--
No	Hardware Raytracing	No
No	Frame Generation	No
--	Max. GPU Memory	--
--	DirectX Version	--

Hardware codec support A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.
no iGPU	GPU	no iGPU
No	Codec h265 / HEVC (8 bit)	No
No	Codec h265 / HEVC (10 bit)	No
No	Codec h264	No
No	Codec VP9	No
No	Codec VP8	No
No	Codec AV1	No
No	Codec AVC	No
No	Codec VC-1	No
No	Codec JPEG	No

Memory & PCIe The Intel Core i9-9940X supports a maximum of 128 GB of memory in 4 memory channels. The AMD Ryzen 9 3900X can connect up to 128 GB of memory in 2 memory channels.
Intel Core i9-9940X	Characteristic	AMD Ryzen 9 3900X
DDR4-2666	Memory	DDR4-3200
128 GB	Max. Memory	128 GB
4 (Quad Channel)	Memory channels	2 (Dual Channel)
85.4 GB/s	Max. Bandwidth	51.2 GB/s
No	ECC	Yes
--	L2 Cache	6.00 MB
19.00 MB	L3 Cache	64.00 MB
3.0	PCIe version	4.0
44	PCIe lanes	20
43.3 GB/s	PCIe Bandwidth	39.4 GB/s
Thermal Management The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i9-9940X has a TDP of 165 W, that of the AMD Ryzen 9 3900X is 105 W.
Intel Core i9-9940X	Characteristic	AMD Ryzen 9 3900X
165 W	TDP (PL1 / PBP)	105 W
--	TDP (PL2)	142 W
--	TDP up	--
--	TDP down	--
92 °C	Tjunction max.	95 °C
Technical details The Intel Core i9-9940X has a 19.00 MB cache, while the AMD Ryzen 9 3900X cache has a total of 70.00 MB.

Intel Core i9-9940X	Characteristic	AMD Ryzen 9 3900X
14 nm	Technology	7 nm
Monolithic	Chip design	Chiplet
x86-64 (64 bit)	Instruction set (ISA)	x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2, AVX-512	ISA extensions	SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
LGA 2066	Socket	AM4 (PGA 1331)
VT-x, VT-x EPT, VT-d	Virtualization	AMD-V, SVM
Yes	AES-NI	Yes
Windows 10, Windows 11, Linux	Operating systems	Windows 10, Windows 11, Linux
Q4/2018	Release date	Q3/2019
1387 $	Release price	499 $

show more data		show more data

Intel Core i9-9940X 14C 28T @ 3.30 GHz (4.50 GHz) buy now on Amazon and save! AMD Ryzen 9 3900X 12C 24T @ 3.80 GHz (4.60 GHz) buy now on Amazon and save!

Rate these processors

Average performance in benchmarks

⌀ Single core performance in 4 CPU benchmarks

Intel Core i9-9940X (90%)

AMD Ryzen 9 3900X (100%)

⌀ Multi core performance in 5 CPU benchmarks

Intel Core i9-9940X (91%)

AMD Ryzen 9 3900X (98%)

Price-performance ratio

Geekbench 6 multi-core score divided by the processor's release price. Higher is better.


	Intel Core i9-9940X Geekbench 6 MT: 10,820 / 1387 $	7.80
	AMD Ryzen 9 3900X Geekbench 6 MT: 10,689 / 499 $	21.42

Geekbench 6 Single-Core

Geekbench 6 is a partial load benchmark for modern computers, notebooks and smartphones. In the single-core test, only the fastest CPU core is measured. The test run simulates the performance in practice.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	1459 (85%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	1714 (100%)

Geekbench 6 Multi-Core

The practical Geekbench 6 multi-core benchmark tests the system's performance under partial load. The processor's maximum power consumption is far from being used up.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	10820 (100%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	10689 (99%)

Geekbench 5, 64bit Single-Core

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	1174 (90%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	1300 (100%)

Geekbench 5, 64bit Multi-Core

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	13946 (100%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	12454 (89%)

Cinebench R20 Single-Core

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	457 (91%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	502 (100%)

Cinebench R20 Multi-Core

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	5912 (85%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	6954 (100%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	28390 (87%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	32755 (100%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	197 (92%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	214 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	2587 (82%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	3168 (100%)

Cinebench 2024 Single-Core

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	78 (100%)

Cinebench 2024 Multi-Core

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	1068 (100%)

Cinebench R23 Single-Core

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	1302 (100%)

Cinebench R23 Multi-Core

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	18165 (100%)

Blender 3.1 Benchmark

In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	281 (100%)

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.


	Intel Core i9-9940X 14C 28T @ 4.20 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 4.00 GHz	115.9 (100%)

CPU-Z Benchmark 17 Single-Core

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.


	Intel Core i9-9940X 14C 28T @ 4.50 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 4.60 GHz	536 (100%)

CPU-Z Benchmark 17 Multi-Core

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.


	Intel Core i9-9940X 14C 28T @ 3.30 GHz	0 (0%)
	AMD Ryzen 9 3900X 12C 24T @ 3.80 GHz	8183 (100%)

Devices using this processor
Intel Core i9-9940X	AMD Ryzen 9 3900X
Unknown	Unknown

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Intel Core i9-9940X vs AMD Ryzen 9 3900X

CPU comparison with benchmarks

CPU comparison

CPU Cores and Base Frequency

NPU AI performance

Integrated graphics (iGPU)

Hardware codec support

Memory & PCIe

Thermal Management

Technical details

Rate these processors

Average performance in benchmarks

Price-performance ratio

Devices using this processor

Popular comparisons containing this CPUs