FPSVersusCore i7-1255U vs Core i7-8700K
Performance score
Core i7-1255U and Core i7-8700K are almost equally fast (under 3% apart) — choose by price, socket and platform.
The score is our own estimate from the specs (cores, threads, clocks, architecture generation), not a benchmark run. 100 = the fastest CPU in our database.
Real tests
What the test measures
Blender is a popular free 3D graphics program. The test makes the device render three ready-made 3D scenes (light, shadows, reflections) and counts how many render passes it finishes per minute. The higher the number, the faster the device handles heavy work: 3D, video editing, photo processing. On a CPU the test loads all cores at once, so it shows the chip's full power; on a graphics card it shows its compute strength.
Median of real test runs on users' computers. It does not show FPS in games. Data updated: 31.10.2026.
Overview
| Core i7-1255U | Core i7-8700K | |
|---|---|---|
| Score (0–100) | 27.57 | 27.21 |
| Ranking position | 345 | 348 |
| Power efficiency (0–100) | no data | 14.97 |
| Type | Laptop | Desktop |
| Manufacturer | Intel | Intel |
| Architecture | Alder Lake | Coffee Lake |
| Release date | Q1 2022 | Q4 2017 |
Specifications
| Core i7-1255U | Core i7-8700K | |
|---|---|---|
| Cores | 10 | 6 |
| Threads | 12 | 12 |
| P + E cores | 2 + 8 | no data |
| Base clock | 1.7 GHz | 3.7 GHz |
| Boost clock | 4.7 GHz | 4.7 GHz |
| L3 cache | 12 MB | 12 MB |
| Process node | no data | 14 nm |
| Unlocked multiplier | no | yes |
| Integrated graphics | Intel Iris Xe Graphics | Intel UHD Graphics 630 |
| NPU (AI accelerator) | no | no |
Compatibility
| Core i7-1255U | Core i7-8700K | |
|---|---|---|
| Socket | no data | LGA1151 |
| TDP | no data | 95 W |
Memory and PCI Express
| Core i7-1255U | Core i7-8700K | |
|---|---|---|
| Memory type | no data | DDR4-2666 |
| Memory channels | no data | 2 |
| Max memory | no data | 128 GB |
| PCI Express version | no data | 3.0 |
| PCIe lanes | no data | 16 |
Pros and cons
Core i7-1255U
- 34% faster single core
- more cores: 10 vs 6
- newer: released in 2022
Core i7-8700K
- unlocked multiplier (can be overclocked)
Other comparisons
Visitor rating
Questions and comments
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