Pentium Gold 6405U vs Core 2 Quad Q8400
Aggregate performance score
Pentium Gold 6405U outperforms Core 2 Quad Q8400 by a substantial 32% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Quad Q8400 and Pentium Gold 6405U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2278 | 2043 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Comet Lake |
| Power efficiency | 1.29 | 10.79 |
| Architecture codename | Yorkfield (2007−2009) | Comet Lake-U (2019−2020) |
| Release date | 19 April 2009 (15 years ago) | 31 October 2019 (5 years ago) |
| Launch price (MSRP) | no data | $161 |
Detailed specifications
Core 2 Quad Q8400 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 | 2.66 GHz | 2.4 GHz |
| Boost clock speed | 0.67 GHz | 2.4 GHz |
| Bus rate | 1333 MHz | 4 GT/s |
| L1 cache | 64 KB (per core) | 256 KB |
| L2 cache | 4 MB (shared) | 1 MB |
| L3 cache | 0 KB | 2 MB |
| Chip lithography | 45 nm | 14 nm |
| Die size | 2x 82 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 71 °C | no data |
| Number of transistors | 456 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Quad Q8400 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 | 1 |
| Socket | FCLGA775,LGA775 | FCBGA1528 |
| Power consumption (TDP) | 95 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Pentium Gold 6405U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
Security technologies
Core 2 Quad Q8400 and Pentium Gold 6405U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| Secure Key | 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 2 Quad Q8400 and Pentium Gold 6405U are enumerated here.
| AMD-V | - | + |
| VT-d | no data | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Pentium Gold 6405U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR4 |
| Maximum memory size | no data | 64 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 37.5 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | Intel UHD Graphics for 10th Gen Intel Processors |
| Max video memory | no data | 32 GB |
| Quick Sync Video | - | + |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 950 MHz |
Graphics interfaces
Available interfaces and connections of Core 2 Quad Q8400 and Pentium Gold 6405U integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Core 2 Quad Q8400 and Pentium Gold 6405U 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 |
Graphics API support
APIs supported by Core 2 Quad Q8400 and Pentium Gold 6405U 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 2 Quad Q8400 and Pentium Gold 6405U.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | no data | 12 |
Pros & cons summary
| Performance score | 1.30 | 1.72 |
| Recency | 19 April 2009 | 31 October 2019 |
| Physical cores | 4 | 2 |
| Chip lithography | 45 nm | 14 nm |
| Power consumption (TDP) | 95 Watt | 15 Watt |
Core 2 Quad Q8400 has 100% more physical cores.
Pentium Gold 6405U, on the other hand, has a 32.3% higher aggregate performance score, an age advantage of 10 years, a 221.4% more advanced lithography process, and 533.3% lower power consumption.
The Pentium Gold 6405U is our recommended choice as it beats the Core 2 Quad Q8400 in performance tests.
Note that Core 2 Quad Q8400 is a desktop processor while Pentium Gold 6405U is a notebook one.
Should you still have questions on choice between Core 2 Quad Q8400 and Pentium Gold 6405U, ask them in Comments section, and we shall answer.
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