Ultra 5 245KF vs Celeron B800
Aggregate performance score
Core Ultra 5 245KF outperforms Celeron B800 by a whopping 6490% based on our aggregate benchmark results.
Primary details
Comparing Celeron B800 and Core Ultra 5 245KF processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2990 | 176 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 82.57 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Celeron | no data |
| Power efficiency | 1.13 | 20.94 |
| Architecture codename | Sandy Bridge (2011−2013) | Arrow Lake-S (2024−2025) |
| Release date | 19 June 2011 (13 years ago) | 24 October 2024 (less than a year ago) |
| Launch price (MSRP) | $80 | $294 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Celeron B800 and Core Ultra 5 245KF 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 | 2 (Dual-core) | 14 (Tetradeca-Core) |
| Performance-cores | no data | 6 |
| Efficient-cores | no data | 8 |
| Threads | 2 | 14 |
| Base clock speed | no data | 4.2 GHz |
| Boost clock speed | 1.5 GHz | 5.2 GHz |
| Bus type | DMI 2.0 | no data |
| Bus rate | 4 × 5 GT/s | no data |
| Multiplier | 15 | no data |
| L1 cache | 64K (per core) | 112 KB (per core) |
| L2 cache | 256K (per core) | 3 MB (per core) |
| L3 cache | 2 MB (shared) | 24 MB (shared) |
| Chip lithography | 32 nm | 3 nm |
| Die size | 131 mm2 | 243 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | 504 million | 17,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Celeron B800 and Core Ultra 5 245KF 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 (Uniprocessor) | 1 |
| Socket | G2 (988B) | FCLGA1851 |
| Power consumption (TDP) | 35 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron B800 and Core Ultra 5 245KF. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| FMA | + | - |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| TSX | - | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Deep Learning Boost | - | + |
| Supported AI Software Frameworks | - | OpenVINO™, WindowsML, DirectML, ONNX RT, WebNN |
Security technologies
Celeron B800 and Core Ultra 5 245KF technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | + | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Celeron B800 and Core Ultra 5 245KF are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Celeron B800 and Core Ultra 5 245KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR5-6400 |
| Maximum memory size | 16 GB | 192 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 21.335 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics (Sandy Bridge) (650 - 1000 MHz) | N/A |
Peripherals
Specifications and connection of peripherals supported by Celeron B800 and Core Ultra 5 245KF.
| PCIe version | no data | 5.0 and 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.
Pros & cons summary
| Performance score | 0.42 | 27.68 |
| Recency | 19 June 2011 | 24 October 2024 |
| Physical cores | 2 | 14 |
| Threads | 2 | 14 |
| Chip lithography | 32 nm | 3 nm |
| Power consumption (TDP) | 35 Watt | 125 Watt |
Celeron B800 has 257.1% lower power consumption.
Ultra 5 245KF, on the other hand, has a 6490.5% higher aggregate performance score, an age advantage of 13 years, 600% more physical cores and 600% more threads, and a 966.7% more advanced lithography process.
The Core Ultra 5 245KF is our recommended choice as it beats the Celeron B800 in performance tests.
Be aware that Celeron B800 is a notebook processor while Core Ultra 5 245KF is a desktop one.
Should you still have questions on choice between Celeron B800 and Core Ultra 5 245KF, ask them in Comments section, and we shall answer.
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