Ryzen 7 7840H vs Ryzen 9 3950X

Primary details

Comparing Ryzen 9 3950X and Ryzen 7 7840H processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	206	342
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	18.03	no data
Market segment	Desktop processor	Laptop
Series	AMD Ryzen 9	no data
Power efficiency	21.98	48.32
Architecture codename	Matisse (Zen 2) (2019−2020)	Phoenix (2023−2024)
Release date	14 November 2019 (5 years ago)	January 2023 (1 year ago)
Launch price (MSRP)	$799	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 3950X and Ryzen 7 7840H 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	3.8 GHz
Boost clock speed	4.7 GHz	5.1 GHz
L1 cache	96K (per core)	64K (per core)
L2 cache	512K (per core)	1 MB (per core)
L3 cache	64 MB	16 MB (shared)
Chip lithography	7 nm, 12 nm	4 nm
Die size	2 x 72 mm + 125 mm (IO-Die) mm2	178 mm2
Number of transistors	19,200 million	25,000 million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	-

Compatibility

Information on Ryzen 9 3950X and Ryzen 7 7840H 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	FP8
Power consumption (TDP)	105 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3950X and Ryzen 7 7840H. 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	no data
AES-NI	+	+
AVX	+	+
Precision Boost 2	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3950X and Ryzen 7 7840H are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3950X and Ryzen 7 7840H. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR5-5600
Maximum memory size	128 GB	no data
Maximum memory bandwidth	51.196 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

-

AMD Radeon 780M

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3950X and Ryzen 7 7840H.

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.

---

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.

---

Pros & cons summary

---

Performance score	24.39	17.87
Physical cores	16	8
Threads	32	16
Chip lithography	7 nm	4 nm
Power consumption (TDP)	105 Watt	35 Watt

---

Should you still have questions on choice between Ryzen 9 3950X and Ryzen 7 7840H, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---