Pentium Gold 6405U vs i5-6600K
Aggregate performance score
Core i5-6600K outperforms Pentium Gold 6405U by a whopping 129% based on our aggregate benchmark results.
Primary details
Comparing Core i5-6600K and Pentium Gold 6405U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1418 | 2028 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.71 | no data |
| Market segment | Desktop processor | Laptop |
| Series | Intel Core i5 (Desktop) | Intel Comet Lake |
| Power efficiency | 4.13 | 10.93 |
| Architecture codename | Skylake (2015−2016) | Comet Lake-U (2019−2020) |
| Release date | 5 August 2015 (9 years ago) | 31 October 2019 (5 years ago) |
| Launch price (MSRP) | $242 | $161 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i5-6600K and Pentium Gold 6405U 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) | 2 (Dual-core) |
| Threads | 4 | 4 |
| Base clock speed | 3.5 GHz | 2.4 GHz |
| Boost clock speed | 3.9 GHz | 2.4 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | 4 GT/s |
| Multiplier | 35 | no data |
| L1 cache | 64 KB (per core) | 256 KB |
| L2 cache | 256 KB (per core) | 1 MB |
| L3 cache | 6 MB (shared) | 2 MB |
| Chip lithography | 14 nm | 14 nm |
| Die size | 122 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 64 °C | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i5-6600K and Pentium Gold 6405U 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 (Uniprocessor) | 1 |
| Socket | FCLGA1151 | FCBGA1528 |
| Power consumption (TDP) | 91 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i5-6600K and Pentium Gold 6405U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | + | + |
| AVX | + | - |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | 2.0 | - |
| Hyper-Threading Technology | - | + |
| TSX | + | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
Security technologies
Core i5-6600K and Pentium Gold 6405U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| Secure Key | + | + |
| MPX | + | - |
| Identity Protection | + | + |
| SGX | Yes with Intel® ME | Yes with Intel® ME |
| OS Guard | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i5-6600K and Pentium Gold 6405U are enumerated here.
| AMD-V | + | + |
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i5-6600K and Pentium Gold 6405U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3, DDR4 | DDR4 |
| Maximum memory size | 64 GB | 64 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 34.134 GB/s | 37.5 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 530 | Intel® UHD Graphics for 10th Gen Intel® Processors |
| Max video memory | 64 GB | 32 GB |
| Quick Sync Video | + | + |
| Clear Video | + | + |
| Clear Video HD | + | + |
| Graphics max frequency | 1.15 GHz | 950 MHz |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i5-6600K and Pentium Gold 6405U integrated GPUs.
| Number of displays supported | 3 | 3 |
| eDP | + | + |
| DisplayPort | + | + |
| HDMI | + | + |
| DVI | + | + |
Graphics image quality
Maximum display resolutions supported by Core i5-6600K and Pentium Gold 6405U integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | + | + |
| Max resolution over HDMI 1.4 | 4096x2304@24Hz | 4096x2304@24Hz |
| Max resolution over eDP | 4096x2304@60Hz | 4096x2304@60Hz |
| Max resolution over DisplayPort | 4096x2304@60Hz | 4096x2304@60Hz |
| Max resolution over VGA | N/A | no data |
Graphics API support
APIs supported by Core i5-6600K and Pentium Gold 6405U integrated GPUs, sometimes API versions are included.
| DirectX | 12 | 12 |
| OpenGL | 4.5 | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Core i5-6600K and Pentium Gold 6405U.
| PCIe version | 3.0 | 2.0 |
| PCI Express lanes | 16 | 12 |
Pros & cons summary
| Performance score | 3.99 | 1.74 |
| Recency | 5 August 2015 | 31 October 2019 |
| Physical cores | 4 | 2 |
| Power consumption (TDP) | 91 Watt | 15 Watt |
i5-6600K has a 129.3% higher aggregate performance score, and 100% more physical cores.
Pentium Gold 6405U, on the other hand, has an age advantage of 4 years, and 506.7% lower power consumption.
The Core i5-6600K is our recommended choice as it beats the Pentium Gold 6405U in performance tests.
Note that Core i5-6600K is a desktop processor while Pentium Gold 6405U is a notebook one.
Should you still have questions on choice between Core i5-6600K and Pentium Gold 6405U, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
