i9-11900KB vs Atom N455
Primary details
Comparing Atom N455 and Core i9-11900KB processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 495 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 17.86 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Atom | no data |
| Power efficiency | no data | 21.01 |
| Architecture codename | Pinetrail (2009−2011) | Tiger Lake-H (2021) |
| Release date | 1 June 2010 (14 years ago) | May 2021 (3 years ago) |
| Launch price (MSRP) | $64 | $539 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Atom N455 and Core i9-11900KB 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 | 1 (Single-Core) | 8 (Octa-Core) |
| Threads | 2 | 16 |
| Base clock speed | 1.66 GHz | 3.3 GHz |
| Boost clock speed | 1.67 GHz | 4.9 GHz |
| Bus rate | 533 MHz | 8 GT/s |
| L1 cache | 64 KB (per core) | 80K (per core) |
| L2 cache | 512K (per core) | 1.25 MB (per core) |
| L3 cache | 0 KB | 24 MB (shared) |
| Chip lithography | 45 nm | 10 nm SuperFin |
| Die size | 66 mm2 | 190 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 123 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | - | + |
Compatibility
Information on Atom N455 and Core i9-11900KB 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 | FCBGA559 | FCBGA1787 |
| Power consumption (TDP) | 6.5 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom N455 and Core i9-11900KB. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE2, Intel® SSE3, Intel® SSSE3 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | + | + |
| Idle States | no data | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | - | no data |
| Turbo Boost Max 3.0 | no data | + |
| Deep Learning Boost | - | + |
Security technologies
Atom N455 and Core i9-11900KB technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| Secure Key | no data | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom N455 and Core i9-11900KB are enumerated here.
| VT-d | - | + |
| VT-x | - | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom N455 and Core i9-11900KB. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4 |
| Maximum memory size | 2 GB | 128 GB |
| Max memory channels | 1 | 2 |
| Maximum memory bandwidth | no data | 51.2 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel GMA 3150 | Intel® UHD Graphics for 11th Gen Intel® Processors |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 1.45 GHz |
| Execution Units | no data | 32 |
Graphics interfaces
Available interfaces and connections of Atom N455 and Core i9-11900KB integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Atom N455 and Core i9-11900KB integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@60Hz |
| Max resolution over eDP | no data | 4096 x 2304@60Hz |
| Max resolution over DisplayPort | no data | 7680x4320@60Hz |
Graphics API support
APIs supported by Atom N455 and Core i9-11900KB integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Atom N455 and Core i9-11900KB.
| 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.
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.
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.
Pros & cons summary
| Physical cores | 1 | 8 |
| Threads | 2 | 16 |
| Chip lithography | 45 nm | 10 nm |
| Power consumption (TDP) | 6 Watt | 65 Watt |
Atom N455 has 983.3% lower power consumption.
i9-11900KB, on the other hand, has 700% more physical cores and 700% more threads, and a 350% more advanced lithography process.
We couldn't decide between Atom N455 and Core i9-11900KB. We've got no test results to judge.
Be aware that Atom N455 is a notebook processor while Core i9-11900KB is a desktop one.
Should you still have questions on choice between Atom N455 and Core i9-11900KB, ask them in Comments section, and we shall answer.
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