FPSVersusCore i5-9400F vs Core i7-6700K
Performance score
Core i5-9400F and Core i7-6700K are almost equally fast (under 3% apart) — choose by price, socket and platform.
Both CPUs use the same socket (LGA1151), so you can swap one for the other on the same board (check BIOS support).
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 i5-9400F | Core i7-6700K | |
|---|---|---|
| Score (0–100) | 20.64 | 20.15 |
| Ranking position | 427 | 431 |
| Power efficiency (0–100) | 16.59 | 11.57 |
| Type | Desktop | Desktop |
| Manufacturer | Intel | Intel |
| Architecture | Coffee Lake Refresh | Skylake |
| Release date | Q1 2019 | Q3 2015 |
Specifications
| Core i5-9400F | Core i7-6700K | |
|---|---|---|
| Cores | 6 | 4 |
| Threads | 6 | 8 |
| Base clock | 2.9 GHz | 4 GHz |
| Boost clock | 4.1 GHz | 4.2 GHz |
| L3 cache | 9 MB | 8 MB |
| Process node | 14 nm | 14 nm |
| Unlocked multiplier | no | yes |
| Integrated graphics | no | Intel HD Graphics 530 |
| NPU (AI accelerator) | no | no |
Compatibility
| Core i5-9400F | Core i7-6700K | |
|---|---|---|
| Socket | LGA1151 | LGA1151 |
| TDP | 65 W | 91 W |
Memory and PCI Express
| Core i5-9400F | Core i7-6700K | |
|---|---|---|
| Memory type | DDR4-2666 | DDR4-1866/2133 |
| Memory channels | 2 | 2 |
| Max memory | 128 GB | 64 GB |
| PCI Express version | 3.0 | 3.0 |
| PCIe lanes | 16 | 16 |
Pros and cons
Core i5-9400F
- more cores: 6 vs 4
- bigger L3 cache: 9 MB vs 8 MB
- lower TDP: 65 W vs 91 W
- newer: released in 2019
Core i7-6700K
- more threads: 8 vs 6
- has integrated graphics (Intel HD Graphics 530)
- unlocked multiplier (can be overclocked)
Other comparisons
Visitor rating
Questions and comments
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