Intel Core Ultra 265K 20-core LGA1851
The Arrow Lake-S architecture on 3nm delivers a 5.5 GHz boost across 20 cores with a 125W TDP, enabling cooler, quieter operation without sacrificing its 58,722 PassMark multi-core throughput. Its unlocked multiplier and support for 256GB of DDR5 ECC memory on the new LGA1851 socket provide a flexible, future-proof foundation for DIY builds. This processor is best for productivity users and AI/LLM experimenters who need high multi-threaded efficiency and modern connectivity, rather than pure gaming performance.
Cores 20
Threads 20
Boost Clock 5500 MHz
L3 Cache 36 MB
TDP 125 W
Socket LGA1851
Integrated Graphics Arc Xe-LPG Graphics 64EU
78 Overall Score
No current retailer price
Snapshot
Pros & Cons
Pros
- Strong single thread (100th percentile) 100th
- Strong feature (96th percentile) 96th
- Strong efficiency (96th percentile) 96th
- Strong platform (96th percentile) 96th
Cons
- Below average social proof (5th percentile)
The proof
Performance
Specifications
Full Specifications
Processor
| Brand | Intel |
| Series | Core Ultra 7 |
| Model | 265K |
| Codename | Arrow Lake-S |
| Class | desktop |
| Process | 3 |
Cores & Clocks
| Cores | 20 |
| P-cores | 8 |
| E-cores | 12 |
| Threads | 20 |
| Base Clock | 3900 |
| Boost Clock | 5500 |
Cache
| L2 Cache | 24 |
| L3 Cache | 36 MB |
Performance
| PassMark Multi | 58619 |
| PassMark Single | 4928 |
Memory
| Memory Type | DDR5 |
| Max Speed | 6400 |
| Channels | 2 |
| Max Memory | 256 |
| ECC | Yes |
Platform & Power
| Socket | LGA1851 |
| PCIe | 5 |
| PCIe Lanes | 20 |
| TDP | 125 |
| Max Turbo Power | 250 |
| Unlocked | Yes |
Graphics & AI
| Integrated Graphics | Arc Xe-LPG Graphics 64EU |
vs Competition
| Spec | Intel Core Ultra 265K | AMD Ryzen 7 9800X3D | Dell Xeon E5-2637 V2 | SMC EPYC 9555P | CG CHIPS GATE EPYC 6GK7443-1EX30-0XE0 1PC New 6GK7443-1EX30-0XE0 Communications Processor | HP Xeon P67080-B21 |
|---|---|---|---|---|---|---|
| Cores | 20 | 8 | 32 | 64 | 24 | 16 |
| Threads | 20 | 16 | 64 | 128 | 48 | 32 |
| Boost Clock Mhz | 5500 | 5200 | 3500 | 4400 | 4000 | 3900 |
| L3 Cache Mb | 36 | 96 | 256 | 256 | 128 | 37.5 |
| Tdp W | 125 | 120 | 200 | 360 | 200 | 195 |
| Socket | LGA1851 | AM5 | Socket A/Socket 462 (PGA 462) | AMD Socket SP5 | AMD Socket SP3 | LGA 4677 |
| Integrated Graphics | Arc Xe-LPG Graphics 64EU | AMD Radeon Graphics | No | - | - | No |
| Compare | Compare | Compare | Compare | Compare |
| Product | AI | Feature | Platform | Efficiency | Multi Thread | Social Proof | Single Thread |
|---|---|---|---|---|---|---|---|
| Intel Core Ultra 265K | 95.2 | 96.2 | 95.5 | 95.7 | 95.4 | 5.2 | 99.5 |
| AMD Ryzen 7 9800X3D Compare | 91.3 | 98.5 | 95.1 | 87.7 | 90 | 96.6 | 95.7 |
| Dell Xeon E5-2637 V2 Compare | 99.1 | 90.7 | 76.2 | 97.4 | 99.2 | 1.5 | 89.3 |
| SMC EPYC 9555P Compare | 99.3 | 76.9 | 96.8 | 90.7 | 99.5 | 1.5 | 88.7 |
| CG CHIPS GATE EPYC 6GK7443-1EX30-0XE0 1PC New 6GK7443-1EX30-0XE0 Communications Processor Compare | 94.8 | 76.9 | 84.1 | 83.8 | 94.4 | 38.3 | 80.2 |
| HP Xeon P67080-B21 Compare | 91.7 | 76.9 | 90.7 | 78.2 | 90.9 | 1.5 | 80.4 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
