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 (2nd 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 | 58571 |
| PassMark Single | 4929 |
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 | Hewlett Packard Enterprise Xeon P67080-B21 | CG CHIPS GATE EPYC 6GK7443-1EX30-0XE0 1PC New 6GK7443-1EX30-0XE0 Communications Processor | G.Skill Trident Z Neo | Lenovo Ryzen 5 Sparepart: |
|---|---|---|---|---|---|---|
| Cores | 20 | 8 | 16 | 24 | 6 | 6 |
| Threads | 20 | 16 | 32 | 48 | 12 | 12 |
| Boost Clock Mhz | 5500 | 5200 | 3900 | 4000 | 4200 | 4000 |
| L3 Cache Mb | 36 | 96 | 37.5 | 128 | 32 | 8 |
| Tdp W | 125 | 120 | 195 | 200 | 65 | 15 |
| Socket | LGA1851 | AM5 | LGA 4677 | AMD Socket SP3 | AMD Socket AM4 | AM4 |
| Integrated Graphics | Arc Xe-LPG Graphics 64EU | AMD Radeon Graphics | No | - | - | AMD Integrated Graphics |
| Compare | Compare | Compare | Compare | Compare |
| Product | AI | Feature | Platform | Efficiency | Multi Thread | Social Proof | Single Thread |
|---|---|---|---|---|---|---|---|
| Intel Core Ultra 265K | 95.3 | 96.3 | 95.6 | 95.9 | 95.4 | 2.3 | 99.5 |
| AMD Ryzen 7 9800X3D Compare | 91.4 | 98.5 | 95.2 | 87.8 | 90 | 96.5 | 95.7 |
| Hewlett Packard Enterprise Xeon P67080-B21 Compare | 91.8 | 77.1 | 90.7 | 78.2 | 90.8 | 0 | 80.6 |
| CG CHIPS GATE EPYC 6GK7443-1EX30-0XE0 1PC New 6GK7443-1EX30-0XE0 Communications Processor Compare | 94.8 | 77.1 | 84.2 | 84.2 | 94.5 | 36.4 | 80.5 |
| G.Skill Trident Z Neo Compare | 72.7 | 87.3 | 78.4 | 83.3 | 73.6 | 0 | 72.2 |
| Lenovo Ryzen 5 Sparepart: Compare | 64.2 | 54.9 | 57.2 | 99.3 | 65 | 9.2 | 66.6 |
Price
Value & Pricing
Price History
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
