Intel Core i7-6700 vs Intel Core i5-10400F vs Intel Core i7-6700K
Intel Core i7-6700
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The Intel Core i7-6700 is a high-end quad-core desktop processor based on the Skylake architecture, which was announced in August 2015. The CPU, which is manufactured in a 14 nm process, runs at 3.4 up to 4.0 GHz (2 cores: 3.9 GHz, 4 cores: 3.7 GHz) and can execute up to 8 threads simultaneously thanks to Hyperthreading. Contrary to the Core i7-6700K, the i7-6700 does not have a free multiplier and can hardly be overclocked.
Architecture
Intel uses Skylake to replace both Broadwell and Haswell and therefore once again uses one core design for all TDP classes. Several improvements of the Skylake architecture include bigger Out-to-Order-Buffer, optimizations for pre-fetching as well as bigger gains by Hyperthreading. However, the changes are small for a "Tock" – a new micro architecture – in general, so the per-MHz performance is only between 5-10 % (compared to Haswell) or less than 5 % higher (compared to Broadwell), respectively.
Performance
Even though the Core i7-6700 has a slightly lower clock than the old i7-4790 (3.6 GHz - 4.0 GHz), the performance is slightly better compared to the Haswell predecessor. Another 7 % faster is the top model i7-6700K. Even the most demanding applications and games are no problem for the high-end CPU.
Graphics
Graphics are handled by the integrated Intel HD Graphics 530 with 24 EUs (Execution Units), which is clocked at 350 - 1150 MHz. Compared to the HD Graphics 4600 (Haswell, 20 EUs), the performance is increased by around 25 percent. The overall GPU performance is still low-end, so modern games can, if at all, only be played smoothly with low settings.
Power Consumption
Intel specifies the TDP with 65 Watts.
Intel Core i5-10400F
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The Intel Core i5-10400F is a mid-range processor for desktops with six cores based on the Comet Lake architecture (CML-S, 4th generation of Skylake). The processor clocks at between 2.9 and 4.3 GHz and can execute up to 12 threads simultaneously thanks to Hyper-Threading.
The processor is still manufactured on the old 14nm (14nm++) process.
The Comet Lake architecture is similar to Coffee Lake and offers the same features and is made with the same 14 nm process. Other than the improved clock rates, the memory controller now also supports faster DDR4-2666 RAM. More information on Comet Lake and all the models and articles on it can be found here.
Performance
The average 10400F in our database matches the Ryzen 7 4800U and also the Core i7-9700K in multi-thread performance to be a more than decent mid-range option for your gaming rig, as of early 2022.
Graphics
The CPUs with an "F" suffix do not feature an integrated graphics adapter. The Intel UHD Graphics 630 iGPU is deactivated.
Power consumption
This Core i5 has a default TDP (also known as the long-term power limit) of 65 W which is in line with most desktop chips.
The i5-10400F is built with one of the old 14 nm Intel processes for poor, as of mid 2023, energy efficiency.
Intel Core i7-6700K
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The Intel Core i7-6700K is a high-end quad-core desktop processor based on the Skylake architecture, which was announced in August 2015. The CPU, which is manufactured in a 14 nm process, runs at 4.0 up to 4.2 GHz (2 cores: 4.0 GHz, 3 cores: 4.0 GHz, 4 cores: 4.0 GHz) and can execute up to 8 threads simultaneously thanks to Hyperthreading. Being a so called "K"-model, the Core i7-6700K has a free multiplier and can be easily overclocked.
Performance
Even though the Core i7-6700K has a slightly lower clock than the old i7-4790K (4.0 GHz - 4.4 GHz), the performance is slightly better compared to the Haswell predecessor. Depending on the application, the per-MHz performance was increased by roughly 5-10 %. Even the most demanding applications and games are no problem for the high-end CPU.
Graphics
Graphics are handled by the integrated Intel HD Graphics 530 with 24 EUs (Execution Units), which is clocked at 350 - 1150 MHz. Compared to the HD Graphics 4600 (Haswell, 20 EUs), the performance is increased by around 25 percent. The overall GPU performance is still low-end, so modern games can, if at all, only be played smoothly with low settings.
Power Consumption
The TDP was slightly raised from 88 to 91 Watts compared to the predecessor.
| Model | Intel Core i7-6700 | Intel Core i5-10400F | Intel Core i7-6700K | ||||||||||||||||||||||||||||||||||||||||||||||||
| Codename | Skylake | Comet Lake | Skylake | ||||||||||||||||||||||||||||||||||||||||||||||||
| Series | Intel Core i7 (Desktop) | Intel Comet Lake | Intel Core i7 (Desktop) | ||||||||||||||||||||||||||||||||||||||||||||||||
| Series: Core i7 (Desktop) Skylake |
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| Clock | 3400 - 4000 MHz | 2900 - 4300 MHz | 4000 - 4200 MHz | ||||||||||||||||||||||||||||||||||||||||||||||||
| L1 Cache | 256 KB | 384 KB | 256 KB | ||||||||||||||||||||||||||||||||||||||||||||||||
| L2 Cache | 1 MB | 1.5 MB | 1 MB | ||||||||||||||||||||||||||||||||||||||||||||||||
| L3 Cache | 8 MB | 12 MB | 8 MB | ||||||||||||||||||||||||||||||||||||||||||||||||
| Cores / Threads | 4 / 8 | 6 / 12 | 4 / 8 | ||||||||||||||||||||||||||||||||||||||||||||||||
| TDP | 65 Watt | 65 Watt | 91 Watt | ||||||||||||||||||||||||||||||||||||||||||||||||
| Technology | 14 nm | 14 nm | 14 nm | ||||||||||||||||||||||||||||||||||||||||||||||||
| Socket | FCLGA1151 | LGA1200 | FCLGA1151 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Features | DDR3(L)-1600/DDR4-2133 Memory Controller, HyperThreading, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro | DDR4-2666 RAM, PCIe 3, 8 GT/s bus, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, AVX, AVX2, FMA3 | DDR3(L)-1600/DDR4-2133 Memory Controller, HyperThreading, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro | ||||||||||||||||||||||||||||||||||||||||||||||||
| iGPU | Intel HD Graphics 530 (350 - 1150 MHz) | Intel HD Graphics 530 (350 - 1150 MHz) | |||||||||||||||||||||||||||||||||||||||||||||||||
| Architecture | x86 | x86 | x86 | ||||||||||||||||||||||||||||||||||||||||||||||||
| $303 U.S. | $155 U.S. | $339 U.S. | |||||||||||||||||||||||||||||||||||||||||||||||||
| Announced | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Manufacturer | ark.intel.com | ark.intel.com | ark.intel.com | ||||||||||||||||||||||||||||||||||||||||||||||||
| max. Temp. | 100 °C |
Benchmarks
Average Benchmarks Intel Core i7-6700 → 100% n=19
Average Benchmarks Intel Core i5-10400F → 129% n=19
Average Benchmarks Intel Core i7-6700K → 108% n=19
- Average benchmark values for this graphics card* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation
