Athlon 300U vs Ryzen 9 3900
Aggregate performance score
Ryzen 9 3900 outperforms Athlon 300U by a whopping 698% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 3900 and Athlon 300U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 290 | 1759 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 20.03 | no data |
| Market segment | Desktop processor | Laptop |
| Series | AMD Matisse (Ryzen 3000 Desktop) | AMD Athlon |
| Power efficiency | 28.23 | 15.33 |
| Architecture codename | Matisse (Zen 2) (2019−2020) | Raven Ridge 2 (2019) |
| Release date | 24 September 2019 (5 years ago) | 6 January 2019 (5 years ago) |
| Launch price (MSRP) | $499 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 3900 and Athlon 300U 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 | 12 (Dodeca-Core) | 2 (Dual-core) |
| Threads | 24 | 4 |
| Base clock speed | 3.1 GHz | 2.4 GHz |
| Boost clock speed | 4.3 GHz | 3.3 GHz |
| Bus type | no data | PCIe 3.0 |
| Multiplier | no data | 24 |
| L1 cache | 64 KB (per core) | 128K (per core) |
| L2 cache | 512 KB (per core) | 512K (per core) |
| L3 cache | 64 MB | 4 MB (shared) |
| Chip lithography | 7 nm, 12 nm | 14 nm |
| Die size | 2x 74 mm2 | 209.78 mm2 |
| Number of transistors | 7,600 million | 4940 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 3900 and Athlon 300U 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 (Uniprocessor) |
| Socket | AM4 | FP5 |
| Power consumption (TDP) | 65 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3900 and Athlon 300U. 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 | XFR, FMA3, SSE 4.2, AVX2, SMT |
| AES-NI | + | + |
| AVX | + | + |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 3900 and Athlon 300U are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900 and Athlon 300U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR4 Dual-channel |
| Maximum memory size | 128 GB | 64 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 51.196 GB/s | 38.397 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | AMD Radeon RX Vega 3 ( - 1000 MHz) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 3900 and Athlon 300U.
| PCIe version | 4.0 | 3.0 |
| PCI Express lanes | 24 | 12 |
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.
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.
Cinebench 10 32-bit single-core
Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.
Cinebench 10 32-bit multi-core
Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.
Cinebench 15 64-bit multi-core
Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.
Cinebench 15 64-bit single-core
Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.
TrueCrypt AES
TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.
x264 encoding pass 2
x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.
x264 encoding pass 1
x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.
WinRAR 4.0
WinRAR 4.0 is an outdated version of a popular file archiver. It contains an internal speed test, using 'Best' setting of RAR compression on large chunks of randomly generated data. Its results are measured in kilobytes per second.
Geekbench 5.5 Multi-Core
Geekbench 5.5 Single-Core
WebXPRT 3
Geekbench 4.0 64-bit multi-core
Geekbench 4.0 64-bit single-core
Pros & cons summary
| Performance score | 19.39 | 2.43 |
| Recency | 24 September 2019 | 6 January 2019 |
| Physical cores | 12 | 2 |
| Threads | 24 | 4 |
| Chip lithography | 7 nm | 14 nm |
| Power consumption (TDP) | 65 Watt | 15 Watt |
Ryzen 9 3900 has a 697.9% higher aggregate performance score, an age advantage of 8 months, 500% more physical cores and 500% more threads, and a 100% more advanced lithography process.
Athlon 300U, on the other hand, has 333.3% lower power consumption.
The Ryzen 9 3900 is our recommended choice as it beats the Athlon 300U in performance tests.
Note that Ryzen 9 3900 is a desktop processor while Athlon 300U is a notebook one.
Should you still have questions on choice between Ryzen 9 3900 and Athlon 300U, ask them in Comments section, and we shall answer.
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