Intel Core i5-8400 vs Intel Core Ultra 7 265KF
31.1Single-core90.1
28.6Multi-core91.3
27.2Gamingspec-based65.7
2 spec wins — Intel Core i5-840017 spec wins — Intel Core Ultra 7 265KF
InnoReviews verdict
Intel Core Ultra 7 265KF wins this desktop processor face-off, 84.5 to 29, pulling ahead mainly in multi-core (+63) and single-core (+59). Intel Core i5-8400 still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Intel Core i5-8400
- 48% lower Base TDP: 65 W vs 125 W
- Has Cooler included — the other doesn't
- Lower launch price: $182 vs $379
Reasons to pick the Intel Core Ultra 7 265KF
- Stronger single-core score: 90 vs 31
- Stronger multi-core score: 91 vs 29
- 2300% higher L2 cache: 36 MB vs 2 MB
- 535% higher PassMark: 58,454 vs 9,200
- 359% higher Geekbench 6 (multi): 22,483 vs 4,900
General
| Spec | Intel Core i5-8400 | Intel Core Ultra 7 265KF |
|---|---|---|
| Announced | 2017 | 2024 |
| Socket | LGA1151-v2 | LGA1851 |
| Process | 14 nm | 3 nm+79% |
| Base TDP | 65 W+48% | 125 W |
| Max turbo power | — | 250 W |
| Unlocked multiplier | No | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | Intel Core i5-8400 | Intel Core Ultra 7 265KF |
|---|---|---|
| Cores | 6 | 20+233% |
| Performance cores | 6 | 8+33% |
| Efficiency cores | 0 | 12 |
| Threads | 6 | 20+233% |
| Base clock | 2.8 GHz | 3.9 GHz+39% |
| Boost clock | 4 GHz | 5.5 GHz+38% |
| L2 cache | 2 MB | 36 MB+2300% |
| L3 cache | 9 MB | 30 MB+233% |
Integrated GPU
| Spec | Intel Core i5-8400 | Intel Core Ultra 7 265KF |
|---|---|---|
| iGPU | Intel UHD Graphics 630 | — |
| iGPU clock | 1,050 MHz | — |
Memory
| Spec | Intel Core i5-8400 | Intel Core Ultra 7 265KF |
|---|---|---|
| Memory support | DDR4-2666 | DDR5-6400 |
| Max memory | 64 GB | 256 GB+300% |
| Memory channels | 2 | 2 |
Platform
| Spec | Intel Core i5-8400 | Intel Core Ultra 7 265KF |
|---|---|---|
| PCIe version | 3 | 5+67% |
| CPU PCIe lanes | 16 | 24+50% |
Benchmarks
| Spec | Intel Core i5-8400 | Intel Core Ultra 7 265KF |
|---|---|---|
| Geekbench 6 (single) | 1,370Bottom 22% | 3,235+136%Top 9% |
| Geekbench 6 (multi) | 4,900Bottom 20% | 22,483+359%Top 3% |
| Cinebench R23 (single) | 1,150Bottom 23% | — |
| Cinebench R23 (multi) | 6,400Bottom 19% | — |
| PassMark | 9,200Bottom 14% | 58,454+535%Top 10% |
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