Core i5-6400 vs Core i7-2700K
Aggregated performance score
Core i7-2700K outperforms Core i5-6400 by 6% based on our aggregated benchmark results.
General info
Comparing Core i7-2700K and Core i5-6400 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 1384 | 1436 |
| Place by popularity | not in top-100 | not in top-100 |
| Value for money | 1.92 | 1.29 |
| Market segment | Desktop processor | Desktop processor |
| Series | Core i7 (Desktop) | Intel Core i5 |
| Architecture codename | Sandy Bridge (2011−2013) | Skylake (2015−2016) |
| Release date | 24 October 2011 (12 years ago) | 2 July 2015 (8 years ago) |
| Launch price (MSRP) | $514 | $187 |
| Current price | $90 (0.2x MSRP) | $119 (0.6x MSRP) |
Value for money
Performance per price, higher is better.
i7-2700K has 49% better value for money than i5-6400.
Technical specs
Core i7-2700K and Core i5-6400 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 4 (Quad-Core) | 4 (Quad-Core) |
| Threads | 8 | 4 |
| Base clock speed | 3.5 GHz | 2.7 GHz |
| Boost clock speed | 3.9 GHz | 3.3 GHz |
| L1 cache | 64 KB (per core) | 64K (per core) |
| L2 cache | 256 KB (per core) | 256K (per core) |
| L3 cache | 8 MB (shared) | 6 MB (shared) |
| Chip lithography | 32 nm | 14 nm |
| Die size | 216 mm2 | 177 mm2 |
| Maximum core temperature | 73 °C | 71 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 1,160 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | Yes | No |
Compatibility
Information on Core i7-2700K and Core i5-6400 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | 1 |
| Socket | LGA1155 | FCLGA1151 |
| Power consumption (TDP) | 95 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-2700K and Core i5-6400. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| AVX | + | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 2.0 | 2.0 |
| Hyper-Threading Technology | + | - |
| TSX | no data | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | no data |
| SIPP | no data | - |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| Status | Discontinued | Discontinued |
Security technologies
Core i7-2700K and Core i5-6400 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| Secure Key | no data | + |
| MPX | no data | + |
| Identity Protection | + | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-2700K and Core i5-6400 are enumerated here.
| AMD-V | no data | + |
| VT-d | - | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-2700K and Core i5-6400. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3, DDR4 |
| Maximum memory size | 32 GB | 64 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 21 GB/s | 34.1 GB/s |
| ECC memory support | - | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel HD Graphics 3000 | Intel HD Graphics 530 |
| Max video memory | no data | 64 GB |
| Quick Sync Video | + | + |
| Clear Video | no data | + |
| Clear Video HD | + | + |
| Graphics max frequency | 1.35 GHz | 950 MHz |
| InTru 3D | + | + |
Graphics interfaces
Available interfaces and connections of Core i7-2700K and Core i5-6400 integrated GPUs.
| Number of displays supported | 2 | 3 |
| eDP | no data | + |
| DisplayPort | no data | + |
| HDMI | no data | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Core i7-2700K and Core i5-6400 integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@24Hz |
| Max resolution over eDP | no data | 4096x2304@60Hz |
| Max resolution over DisplayPort | no data | 4096x2304@60Hz |
| Max resolution over VGA | no data | N/A |
Graphics API support
APIs supported by Core i7-2700K and Core i5-6400 integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Core i7-2700K and Core i5-6400.
| PCIe version | 2.0 | 3.0 |
| PCI Express lanes | 16 | 16 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Core i7-2700K outperforms Core i5-6400 by 6% based on our aggregated benchmark results.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Benchmark coverage: 68%
Core i7-2700K outperforms Core i5-6400 by 6% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Core i5-6400 outperforms Core i7-2700K by 68% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Core i5-6400 outperforms Core i7-2700K by 34% in GeekBench 5 Multi-Core.
Cinebench 10 32-bit single-core
Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.
Benchmark coverage: 20%
Core i5-6400 outperforms Core i7-2700K by 2% in Cinebench 10 32-bit single-core.
Cinebench 10 32-bit multi-core
Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.
Benchmark coverage: 19%
Core i7-2700K outperforms Core i5-6400 by 8% in Cinebench 10 32-bit multi-core.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Benchmark coverage: 18%
Core i5-6400 outperforms Core i7-2700K by 47% in wPrime 32.
Cinebench 11.5 64-bit multi-core
Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.
Benchmark coverage: 17%
Core i7-2700K outperforms Core i5-6400 by 18% in Cinebench 11.5 64-bit multi-core.
TrueCrypt AES
TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.
Benchmark coverage: 13%
Core i7-2700K outperforms Core i5-6400 by 30% in TrueCrypt AES.
x264 encoding pass 1
x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.
Benchmark coverage: 13%
Core i5-6400 outperforms Core i7-2700K by 2% in x264 encoding pass 1.
x264 encoding pass 2
x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.
Benchmark coverage: 13%
Core i7-2700K outperforms Core i5-6400 by 11% in x264 encoding pass 2.
3DMark Fire Strike Physics
Benchmark coverage: 4%
Core i5-6400 outperforms Core i7-2700K by 2% in 3DMark Fire Strike Physics.
Advantages and disadvantages
| Performance score | 3.70 | 3.50 |
| Integrated graphics card | 0.66 | 2.59 |
| Recency | 24 October 2011 | 2 July 2015 |
| Threads | 8 | 4 |
| Cost | $514 | $187 |
| Chip lithography | 32 nm | 14 nm |
| Power consumption (TDP) | 95 Watt | 65 Watt |
We couldn't decide between Core i7-2700K and Core i5-6400. The differences in performance seem too small.
Should you still have questions on choice between Core i7-2700K and Core i5-6400, ask them in Comments section, and we shall answer.
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