Ryzen 7 8840U vs Ryzen 9 7900X
Aggregate performance score
Ryzen 9 7900X outperforms Ryzen 7 8840U by a whopping 117% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 7900X and Ryzen 7 8840U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 123 | 471 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Power efficiency | 18.01 | 50.47 |
| Architecture codename | Raphael (Zen4) (2022−2023) | Hawk Point-U (Zen 4) (2023) |
| Release date | 27 September 2022 (2 years ago) | 6 December 2023 (1 year ago) |
Detailed specifications
Ryzen 9 7900X and Ryzen 7 8840U 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) | 8 (Octa-Core) |
| Threads | 24 | 16 |
| Base clock speed | 4.7 GHz | 3.3 GHz |
| Boost clock speed | 5.6 GHz | 5.1 GHz |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 1 MB (per core) | 1 MB (per core) |
| L3 cache | 64 MB (shared) | 16 MB (shared) |
| Chip lithography | 5 nm | 4 nm |
| Die size | 2x 70 (CCD) mm2 + 122 (I/O) mm2 | 178 mm2 |
| Maximum core temperature | 95 °C | 100 °C |
| Maximum case temperature (TCase) | 47 °C | no data |
| Number of transistors | CCD: 6,5 Mrd + IOD: 3,4 Mrd Million | 25,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 7900X and Ryzen 7 8840U 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 | AM5 | FP8 |
| Power consumption (TDP) | 170 Watt | 28 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 7900X and Ryzen 7 8840U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 5 nm (CCD), 6 nm (I/O) nm, 0.650 - 1.475V | Ryzen 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 9 7900X and Ryzen 7 8840U are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7900X and Ryzen 7 8840U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5-5200 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | AMD Radeon Graphics (Ryzen 7000) | AMD Radeon 780M ( - 2700 MHz) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 7900X and Ryzen 7 8840U.
| PCIe version | 5.0 | 4.0 |
| PCI Express lanes | 24 | 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.
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.
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.
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.
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.
3DMark06 CPU
3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Cinebench 11.5 64-bit multi-core
Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported 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.
Cinebench 11.5 64-bit single-core
Cinebench R11.5 is an old benchmark 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 loads a single thread with ray tracing to render a glossy room full of crystal 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.
Geekbench 5.5 Multi-Core
Blender(-)
Geekbench 5.5 Single-Core
7-Zip Single
7-Zip
WebXPRT 3
CrossMark Overall
WebXPRT 4 Overall
Blender v3.3 Classroom CPU(-)
Pros & cons summary
| Performance score | 32.52 | 15.01 |
| Integrated graphics card | 4.42 | 18.32 |
| Recency | 27 September 2022 | 6 December 2023 |
| Physical cores | 12 | 8 |
| Threads | 24 | 16 |
| Chip lithography | 5 nm | 4 nm |
| Power consumption (TDP) | 170 Watt | 28 Watt |
Ryzen 9 7900X has a 116.7% higher aggregate performance score, and 50% more physical cores and 50% more threads.
Ryzen 7 8840U, on the other hand, has 314.5% faster integrated GPU, an age advantage of 1 year, a 25% more advanced lithography process, and 507.1% lower power consumption.
The Ryzen 9 7900X is our recommended choice as it beats the Ryzen 7 8840U in performance tests.
Note that Ryzen 9 7900X is a desktop processor while Ryzen 7 8840U is a notebook one.
Should you still have questions on choice between Ryzen 9 7900X and Ryzen 7 8840U, ask them in Comments section, and we shall answer.
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