i7-1255U vs Ryzen 9 4900H
Aggregate performance score
Ryzen 9 4900H outperforms Core i7-1255U by a considerable 41% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 4900H and Core i7-1255U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 644 | 896 |
| Place by popularity | not in top-100 | 74 |
| Market segment | Laptop | Laptop |
| Series | AMD Renoir (Ryzen 4000 APU) | Intel Alder Lake-M |
| Power efficiency | 21.12 | 53.82 |
| Architecture codename | Renoir-H (Zen 2) (2020) | Alder Lake-U (2022) |
| Release date | 16 March 2020 (4 years ago) | 23 February 2022 (2 years ago) |
Detailed specifications
Ryzen 9 4900H and Core i7-1255U 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 | 8 (Octa-Core) | 10 (Deca-Core) |
| Threads | 16 | 12 |
| Base clock speed | 3.3 GHz | 1.7 GHz |
| Boost clock speed | 4.4 GHz | 4.7 GHz |
| Multiplier | 33 | no data |
| L1 cache | 64 KB (per core) | 80K (per core) |
| L2 cache | 512 KB (per core) | 1.25 MB (per core) |
| L3 cache | 8 MB (shared) | 12 MB (shared) |
| Chip lithography | 7 nm | 10 nm |
| Die size | 156 mm2 | no data |
| Maximum core temperature | 105 °C | 100 °C |
| Number of transistors | 9,800 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
Compatibility
Information on Ryzen 9 4900H and Core i7-1255U 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 | FP6 | Intel BGA 1744 |
| Power consumption (TDP) | 54 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 4900H and Core i7-1255U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, AES, AVX, AVX2, FMA, SHA | no data |
| AES-NI | + | + |
| FMA | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | no data | + |
| TSX | - | + |
Security technologies
Ryzen 9 4900H and Core i7-1255U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 4900H and Core i7-1255U are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 4900H and Core i7-1255U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | DDR4, DDR5 |
| Maximum memory size | 64 GB | no data |
| Max memory channels | 4 | no data |
| Maximum memory bandwidth | 68.27 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | AMD Radeon RX Vega 8 (Ryzen 4000/5000) ( - 1750 MHz) | Intel Iris Xe Graphics G7 96EUs ( - 1250 MHz) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 4900H and Core i7-1255U.
| PCIe version | 3.0 | 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.
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 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.
Geekbench 5.5 Multi-Core
Blender(-)
Geekbench 5.5 Single-Core
7-Zip Single
7-Zip
WebXPRT 3
Pros & cons summary
| Performance score | 12.05 | 8.53 |
| Integrated graphics card | 9.06 | 9.48 |
| Recency | 16 March 2020 | 23 February 2022 |
| Physical cores | 8 | 10 |
| Threads | 16 | 12 |
| Chip lithography | 7 nm | 10 nm |
| Power consumption (TDP) | 54 Watt | 15 Watt |
Ryzen 9 4900H has a 41.3% higher aggregate performance score, 33.3% more threads, and a 42.9% more advanced lithography process.
i7-1255U, on the other hand, has 4.6% faster integrated GPU, an age advantage of 1 year, 25% more physical cores, and 260% lower power consumption.
The Ryzen 9 4900H is our recommended choice as it beats the Core i7-1255U in performance tests.
Should you still have questions on choice between Ryzen 9 4900H and Core i7-1255U, ask them in Comments section, and we shall answer.
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