Intel Core i7 8700K vs i5 8400
38
out of 100
VS
30
out of 100
We compared two 6-core desktop CPUs: the 3.7 GHz Intel Core i7 8700K against the 2.8 GHz i5 8400. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.
Review
Single-Core Performance
Performance in single-threaded apps and benchmarks
Multi-Core Performance
Measure performance when all cores are involved
Power Efficiency
The efficiency score of power consumption
Integrated Graphics
iGPU capabilities for gaming and 3D-intensive tasks
The "iGPU" and "Power Efficiency" have a minor impact on the NanoReview Score for desktop CPU.
Choose your main usage scenario to recalculate the Final Score and see which CPU suits your needs.
Value for money (Beta)
Key Differences
Advantages of Intel Core i7 8700K
- Unlocked multiplier
- Has 3 MB larger L3 cache size
- More powerful Intel UHD Graphics 630 integrated graphics: 0.5 vs 0.4 TFLOPS
- 18% higher Turbo Boost frequency (4.7 GHz vs 4 GHz)
- 23% faster in a single-core Geekbench v6 test - 1741 vs 1414 points
Test in Benchmarks
Comparing the performance of CPUs across various tasksCinebench
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
GeekBench v6
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
| File compression | 509.8 MB/sec | 392.9 MB/sec |
| Clang compilation | 52.2 Klines/sec | 36 Klines/sec |
| HTML 5 Browser | 149.8 pages/sec | 115 pages/sec |
| PDF Renderer | 210.4 Mpixels/sec | 156.8 Mpixels/sec |
| Text processing | 165.3 pages/sec | 139 pages/sec |
| Background blur | 38 images/sec | 33.8 images/sec |
| Photo processing | 61.1 images/sec | 49.9 images/sec |
| Ray tracing | 10.8 Mpixels/sec | 5.93 Mpixels/sec |
PassMark
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
| Integer math | 45.9 GOps/sec | 25.6 GOps/sec |
| Floating point math | 28.5 GOps/sec | 22 GOps/sec |
| Find prime numbers | 39M Primes/sec | 37M Primes/sec |
| Random string sorting | 25.2M Strings/sec | 15.9M Strings/sec |
| Data encryption | 4.8 GBytes/sec | 2.8 GBytes/sec |
| Data compression | 198.7 MBytes/sec | 129.6 MBytes/sec |
| Physics | 811 Frames/sec | 634 Frames/sec |
| Extended instructions | 13.5B Matrices/sec | 11.5B Matrices/sec |
Blender
Blender CPU
Performance Per Watt
| Cinebench 2024 / Watt | 5.3 PPW | 4.8 PPW |
| Geekbench 6 Multi / Watt | 72.9 PPW | 78.2 PPW |
| Passmark CPU Mark / Watt | 142.8 PPW | 142 PPW |
| Blender / Watt | 1.34 PPW | 1.19 PPW |
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.
Recent User Tests
Intel Core i7 8700K
| Date | Benchmark | Result |
|---|---|---|
| 📘 2025-03-12 (SPUUD) | Cinebench 2024 | 69 / 486 |
| 📘 2025-03-09 (angry beaver) | Cinebench 2024 | 70 / 504 |
| 📘 2025-02-14 (Mike) | Cinebench 2024 | 74 / 520 |
| 📘 2024-12-01 (AzureWizzard) | Cinebench 2024 | 72 / 499 |
| 📘 2024-04-21 (Ian Geraldi Cordeiro) | Cinebench 2024 | 64 / 398 |
Intel Core i5 8400
No benchmark results yet
Specifications
Full technical specification of Intel Core i7 8700K and i5 8400General
| Vendor | Intel | Intel |
| Released | October 5, 2017 | October 5, 2017 |
| Type | Desktop | Desktop |
| Instruction Set | x86-64 | x86-64 |
| Codename | Coffee Lake | Coffee Lake |
| Model number | i7-8700K | i5-8400 |
| Integrated GPU | UHD Graphics 630 | UHD Graphics 630 |
| Rival Equivalent | - AMD Ryzen 7 2700X | - AMD Ryzen 5 2400G |
| Successor | - Intel Core Ultra 7 270K Plus | - Intel Core Ultra 5 225 |
CPU
| P-Cores | 6 | 6 |
| P-Threads | 12 | 6 |
| Base Frequency (P) | 3.7 GHz | 2.8 GHz |
| Turbo Boost Frequency (P) | 4.7 GHz | 4 GHz |
| Total Cores | 6 | 6 |
| Total Threads | 12 | 6 |
| Bus Frequency | 100 MHz | 100 MHz |
| Multiplier | 37x | 28x |
| Bus Bandwidth | 8 GT/s | 8 GT/s |
| L1 Cache | 64K (per core) | 64K (per core) |
| L2 Cache | 256K (per core) | 256K (per core) |
| L3 Cache | 12MB (shared) | 9MB (shared) |
| Unlocked Multiplier | Yes | No |
Package
| Fabrication Process | 14 nm | 14 nm |
| TDP (PL1) | 95 W | 65 W |
| Socket | LGA-1151 | LGA-1151 |
| Peak Temperature | 100°C | 100°C |
Desktop CPU ranking (155th and 181st place)
iGPU
| Integrated Graphics | Intel UHD Graphics 630 | Intel UHD Graphics 630 |
| GPU Base Clock | 350 MHz | 350 MHz |
| GPU Boost Clock | 1200 MHz | 1050 MHz |
| Shading Units | 192 | 192 |
| TMUs | 24 | 24 |
| ROPs | 3 | 3 |
| Execution Units | 24 | 24 |
| TGP | 15 W | 15 W |
iGPU FLOPS
Memory Support
| Memory Types | - DDR4-2666 | - DDR4-2666 |
| Max. Memory Size | 128 GB | 128 GB |
| Memory Channels | 2 | 2 |
| Max. Memory Bandwidth | 41.6 GB/s | 41.6 GB/s |
| ECC Support | No | No |
Misc
| Official Site | Intel Core i7 8700K official page | Intel Core i5 8400 official page |
| PCI Express Version | 3.0 | 3.0 |
| PCI Express Lanes | 16 | 16 |
Cast your vote
Total votes: 6