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AMD Ryzen 7 3800X vs Intel Core Ultra 7 265K: Comparison
AMD Ryzen 7 3800X and Intel Core Ultra 7 265K separate most on l2 cache: AMD Ryzen 7 3800X at 4 MB, Intel Core Ultra 7 265K at 36 MB, 89% in favour of Intel Core Ultra 7 265K. PCIe Lanes splits them by another 17%, again favouring Intel Core Ultra 7 265K. They match on 6 other specifications, including form factor, market segment and performance cores. In Blender Cycles (CPU) the Intel Core Ultra 7 265K scores 478 against 173 for the AMD Ryzen 7 3800X, a lead of 64%.
Specs
| Specification |  |  |
|---|---|---|
| Brand | AMD | Intel |
| Form Factor | Desktop | Desktop |
| Model Number | 3800X | 265K |
| Codename | Matisse | Arrow Lake-S |
| Core/Thread Count | 8 Core / 16 Thread | 20 Core (8P+12E) / 20 Thread |
| TDP | 105 W | 125W Base / 250W Max Turbo |
| Market Segment | Desktop | Desktop |
| Cache | 32MB L3 + 4MB L2 + 512KB L1 | 30MB L3 + 36MB L2 |
| Socket | AM4 | LGA 1851 |
| Boost/Base Clock | 4.5 GHz / 3.9 GHz | 5.5 GHz / 3.9 GHz |
| Socket Status | End of Life | Current |
| Process Node | 7 nm | 3 nm |
| Performance Cores | 8 | 8 |
| Efficiency Cores | 0 | 12 |
| SMT Enabled | true | false |
| P-Core Base Clock | 3.9 | 3.9 |
| P-Core Boost Clock | 4.5 | 5.4 |
| Unlocked Multiplier | true | true |
| L2 Cache | 4 MB-89% | 36 MB |
| L3 Cache | 32 MB | 30 MB-6% |
| Base Power | 105 W | 125 W |
| Max Turbo Power | 142 | 250 |
| Memory Type | DDR4 | DDR5 |
| Max Memory Speed | 3200 | 6400 |
| Memory Channels | 2 | 2 |
| Max Memory Capacity | 128 | 256 |
| ECC Support | false | true |
| Integrated Graphics | No | Yes |
| PCIe Generation | 4 | PCIe 5.0 |
| PCIe Lanes | 20-17% | 24 |
| Launch MSRP | 399 | 394 |
| Retail Availability | Retail | Boxed Retail |
| Series | Ryzen 7 | Core Ultra 7 |
| CPU Process Node | 7 Nanometers (TSMC) | TSMC N3B (Compute Tile) |
| Architecture | Zen 2, Ryzen 3000 Series | Arrow Lake, Core Ultra 200 Series |
| Cores | 8 | 20 |
| Threads | 16 | 20 |
Benchmarks
Measured results, not specifications. Percentages are the gap to the leading product in each test.
Blender Cycles (CPU)
Blender 4.5, Blender Open Data (CC0). Median of monster + junkshop + classroom, combined samples/min.
Blender renders 3D scenes by tracing light through them, which loads every core at once. The score measures sustained multi-core throughput, so a chip that wins here can still lose at gaming, where one or two fast cores matter more. Figures come from Blender's Open Data project, which places no restriction on reuse, and we publish the median of every submission for that chip on the same Blender version.
More comparisons in Processors (CPUs)
- AMD 6th Gen A10-8700P APU vs AMD Ryzen 7 3800X
- AMD 6th Gen A10-8700P APU vs Intel Core Ultra 7 265K
- Intel Core Ultra 7 165UL vs Intel Core Ultra 7 265K
- Intel Core Ultra 7 265K vs Intel Core Ultra 7 270K Plus
- Intel Core Ultra 7 265K vs Intel Core Ultra 9 290K Plus
- Intel Core i7-14700K vs Intel Core Ultra 7 265K