A8-3870K vs i7-920
Aggregate performance score
Core i7-920 outperforms A8-3870K by a significant 22% based on our aggregate benchmark results.
Primary details
Comparing Core i7-920 and A8-3870K processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2005 | 2155 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.22 | no data |
| Market segment | Desktop processor | Desktop processor |
| Series | Core i7 (Desktop) | no data |
| Power efficiency | 1.30 | 1.39 |
| Architecture codename | Bloomfield (2008−2010) | Llano (2011−2012) |
| Release date | November 2008 (16 years ago) | 20 December 2011 (12 years ago) |
| Launch price (MSRP) | $340 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i7-920 and A8-3870K 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 | 2.66 GHz | 3 GHz |
| Boost clock speed | 2.93 GHz | 3 GHz |
| Bus rate | 1333 MHz | no data |
| L1 cache | 64 KB (per core) | 128 KB (per core) |
| L2 cache | 256 KB (per core) | 1 MB (per core) |
| L3 cache | 8 MB (shared) | 0 KB |
| Chip lithography | 45 nm | 32 nm |
| Die size | 263 mm2 | 228 mm2 |
| Maximum core temperature | 68 °C | no data |
| Number of transistors | 731 million | 1,178 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | - | + |
Compatibility
Information on Core i7-920 and A8-3870K 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 | FCLGA1366,PLGA1366 | FM1 |
| Power consumption (TDP) | 130 Watt | 100 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-920 and A8-3870K. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | no data |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | 1.0 | no data |
| Hyper-Threading Technology | + | no data |
| Idle States | + | no data |
| Demand Based Switching | - | no data |
| PAE | 36 Bit | no data |
Security technologies
Core i7-920 and A8-3870K technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-920 and A8-3870K are enumerated here.
| AMD-V | - | + |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-920 and A8-3870K. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 24 GB | no data |
| Max memory channels | 3 | no data |
| Maximum memory bandwidth | 25.6 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | AMD Radeon HD 6550D |
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 | 1.86 | 1.52 |
| Threads | 8 | 4 |
| Chip lithography | 45 nm | 32 nm |
| Power consumption (TDP) | 130 Watt | 100 Watt |
i7-920 has a 22.4% higher aggregate performance score, and 100% more threads.
A8-3870K, on the other hand, has a 40.6% more advanced lithography process, and 30% lower power consumption.
The Core i7-920 is our recommended choice as it beats the A8-3870K in performance tests.
Should you still have questions on choice between Core i7-920 and A8-3870K, ask them in Comments section, and we shall answer.
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