Ryzen 5 8645HS vs Ryzen 7 3800X

VS

Aggregate performance score

Ryzen 7 3800X
2019
8 cores / 16 threads, 105 Watt
14.56
+0.6%
Ryzen 5 8645HS
2023
6 cores / 12 threads, 45 Watt
14.47

Ryzen 7 3800X outperforms Ryzen 5 8645HS by a minimal 1% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 7 3800X and Ryzen 5 8645HS processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking496499
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation16.44no data
Market segmentDesktop processorLaptop
SeriesAMD Ryzen 7no data
Power efficiency13.1230.43
Architecture codenameMatisse (2019−2020)Hawk Point-HS (Zen 4) (2023−2024)
Release date27 May 2019 (5 years ago)6 December 2023 (1 year ago)
Launch price (MSRP)$399no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Ryzen 7 3800X and Ryzen 5 8645HS 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 cores8 (Octa-Core)6 (Hexa-Core)
Threads1612
Base clock speed3.9 GHz4.3 GHz
Boost clock speed4.5 GHz5 GHz
L1 cache512 KB64 KB (per core)
L2 cache4 MB1 MB (per core)
L3 cache32 MB16 MB (shared)
Chip lithography7 nm, 12 nm4 nm
Die sizeno data178 mm2
Maximum core temperatureno data100 °C
Number of transistors19,200 million25,000 million
64 bit support++
Windows 11 compatibility+no data
Unlocked multiplier+-

Compatibility

Information on Ryzen 7 3800X and Ryzen 5 8645HS 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 configuration1 (Uniprocessor)1
SocketAM4FP8
Power consumption (TDP)105 Watt45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 7 3800X and Ryzen 5 8645HS. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataRyzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3
AES-NI++
AVX++
Precision Boost 2++

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 7 3800X and Ryzen 5 8645HS are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 7 3800X and Ryzen 5 8645HS. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Dual-channelDDR5
Maximum memory size128 GBno data
Max memory channels2no data
Maximum memory bandwidth51.196 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card-AMD Radeon 760M ( - 2600 MHz)

Peripherals

Specifications and connection of peripherals supported by Ryzen 7 3800X and Ryzen 5 8645HS.

PCIe versionno data4.0
PCI Express lanesno data20

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.

Ryzen 7 3800X 14.56
+0.6%
Ryzen 5 8645HS 14.47

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.

Ryzen 7 3800X 23125
+0.6%
Ryzen 5 8645HS 22985

Gaming performance

Pros & cons summary


Performance score 14.56 14.47
Recency 27 May 2019 6 December 2023
Physical cores 8 6
Threads 16 12
Chip lithography 7 nm 4 nm
Power consumption (TDP) 105 Watt 45 Watt

Ryzen 7 3800X has a 0.6% higher aggregate performance score, and 33.3% more physical cores and 33.3% more threads.

Ryzen 5 8645HS, on the other hand, has an age advantage of 4 years, a 75% more advanced lithography process, and 133.3% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Ryzen 7 3800X and Ryzen 5 8645HS.

Note that Ryzen 7 3800X is a desktop processor while Ryzen 5 8645HS is a notebook one.


Should you still have questions on choice between Ryzen 7 3800X and Ryzen 5 8645HS, ask them in Comments section, and we shall answer.

Vote for your favorite

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AMD Ryzen 7 3800X
Ryzen 7 3800X
AMD Ryzen 5 8645HS
Ryzen 5 8645HS

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Community ratings

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4.5 1756 votes

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Questions & comments

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