Processor comparison
Intel Core i5-8400 vs Intel Core i7-6800K
Intel
Intel Core i5-8400
Intel Socket 1151
2800 MHz
6 cores
Jan 2018
DESKTOP
VS
Intel
Intel Core i7-6800K
Intel Socket 2011-3
3400 MHz
6 cores
May 2016
DESKTOP
Summary
Synthetic performance index
- Intel Core i5-8400100%
- Intel Core i7-6800K103%
Relative performance
Single thread performance index
- Intel Core i5-8400110%
- Intel Core i7-6800K100%
Relative performance
Multi thread performance index
- Intel Core i5-8400100%
- Intel Core i7-6800K116%
Relative performance
Reasons to consider the Intel Core i5-8400
- 10% higher single threaded performance.
- 75 watts lower power draw.
- This is a newer product, it might have better application compatibility/performance (check features chart below).
- Has an integrated GPU, which allows to run the system without a dedicated graphics card, unlike the Intel Core i7-6800K.
Reasons to consider the Intel Core i7-6800K
- 16% higher multi threaded performance.
Gaming
No clear winner declared
Productivity
No clear winner declared
Specifications
Features
| Intel Core i5-8400 | Intel Core i7-6800K |
|---|
| MMX | | |
| SSE | | |
| SSE2 | | |
| SSE3 | | |
| SSSE3 | | |
| SSE4.2 | | |
| AVX | | |
| AVX2 | | |
| EIST | | |
| Intel 64 | | |
| XD bit | | |
| VT-x | | |
| VT-d | | |
| AES-NI | | |
| TSX | | |
| TXT | | |
| CLMUL | | |
| FMA3 | | |
| F16C | | |
| BMI1 | | |
| BMI2 | | |
| Boost 2.0 | | |
| HTT | | |
Architecture
| Intel Core i5-8400 | Intel Core i7-6800K |
|---|
| Architecture | Intel_Coffelake | Intel_Broadwell |
| Market | Desktop | Desktop |
| Memory Support | DDR4 | DDR4 |
| Codename | Coffee Lake | Broadwell-E |
| Release Date | Jan 2018 | May 2016 |
Cores
| Intel Core i5-8400 | Intel Core i7-6800K |
|---|
| Cores | 6 | 6 |
| Threads | 6 | 12 |
| SMPs | 1 | 1 |
| Integrated Graphics | Intel UHD 630 | No |
Cache
| Intel Core i5-8400 | Intel Core i7-6800K |
|---|
| L1 Cache | 64 KB (per core) | 32 KB (per core) |
| L2 Cache | 256 KB (per core) | 256 KB (per core) |
| L3 Cache | 9216 KB (shared) | 15360 KB (shared) |
Physical
| Intel Core i5-8400 | Intel Core i7-6800K |
|---|
| Socket | Intel Socket 1151 | Intel Socket 2011-3 |
| Max Case Temp | 72°C | 72°C |
| Package | FC-LGA1151 | |
| Die Size | 151mm² | unknown |
| Process | 14 nm | 14 nm |
Performance
| Intel Core i5-8400 | Intel Core i7-6800K |
|---|
| Cpu Frequency | 2800 MHz | 3400 MHz |
| Turbo Clock | 4000 MHz | 3800 MHz |
| Base Clock | 100 MHz | 100 MHz |
| Voltage | unknown | unknown |
| TDP | 65 W | 140 W |
Raw performance index
Raw single-thread performance estimation
- Intel Core i5-84004800 points
- Intel Core i7-6800K4256 points
Points - higher is better
Raw multi-thread performance estimation
- Intel Core i5-840020160 points
- Intel Core i7-6800K27417 points
Points - higher is better
Synthetic benchmarks
Cinebench R15 CPU Multi 64Bit
- Intel Core i5-8400939
- Intel Core i7-6800K1096
points - higher is better
Cinebench R15 CPU Single 64Bit
- Intel Core i5-8400170
- Intel Core i7-6800K154
points - higher is better