i7-11700B vs Phenom X3 8400
Aggregate performance score
Core i7-11700B outperforms Phenom X3 8400 by a whopping 1824% based on our aggregate benchmark results.
Primary details
Comparing Phenom X3 8400 and Core i7-11700B processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2670 | 509 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Power efficiency | 0.73 | 20.65 |
| Architecture codename | Toliman (2008) | no data |
| Release date | March 2008 (16 years ago) | 1 April 2021 (3 years ago) |
Detailed specifications
Phenom X3 8400 and Core i7-11700B 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 | 3 (Tri-Core) | 8 (Octa-Core) |
| Threads | 3 | 16 |
| Base clock speed | no data | 3.2 GHz |
| Boost clock speed | 2.1 GHz | 4.8 GHz |
| Bus rate | no data | 8 GT/s |
| L1 cache | 128 KB (per core) | no data |
| L2 cache | 512 KB (per core) | no data |
| L3 cache | 2 MB (shared) | 24 MB |
| Chip lithography | 65 nm | 10 nm SuperFin |
| Die size | 285 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Number of transistors | 450 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Phenom X3 8400 and Core i7-11700B 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 | AM2+ | FCBGA1787 |
| Power consumption (TDP) | 95 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom X3 8400 and Core i7-11700B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| Hyper-Threading Technology | no data | + |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Turbo Boost Max 3.0 | no data | + |
| Deep Learning Boost | - | + |
Security technologies
Phenom X3 8400 and Core i7-11700B technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | no data | + |
| 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 Phenom X3 8400 and Core i7-11700B are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom X3 8400 and Core i7-11700B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | Up to 3200 MT/s |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 51.2 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® UHD Graphics for 11th Gen Intel® Processors |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 1.45 GHz |
| Execution Units | no data | 32 |
Graphics interfaces
Available interfaces and connections of Phenom X3 8400 and Core i7-11700B integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Phenom X3 8400 and Core i7-11700B integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@60Hz |
| Max resolution over eDP | no data | 4096 x 2304@60Hz |
| Max resolution over DisplayPort | no data | 7680x4320@60Hz |
Graphics API support
APIs supported by Phenom X3 8400 and Core i7-11700B integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Phenom X3 8400 and Core i7-11700B.
| PCI Express lanes | no data | 20 |
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.
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.
Pros & cons summary
| Performance score | 0.74 | 14.24 |
| Physical cores | 3 | 8 |
| Threads | 3 | 16 |
| Chip lithography | 65 nm | 10 nm |
| Power consumption (TDP) | 95 Watt | 65 Watt |
i7-11700B has a 1824.3% higher aggregate performance score, 166.7% more physical cores and 433.3% more threads, a 550% more advanced lithography process, and 46.2% lower power consumption.
The Core i7-11700B is our recommended choice as it beats the Phenom X3 8400 in performance tests.
Note that Phenom X3 8400 is a desktop processor while Core i7-11700B is a notebook one.
Should you still have questions on choice between Phenom X3 8400 and Core i7-11700B, 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.
