Core i7-640LM vs Core 2 Duo E8400
Aggregated performance score
Core i7-640LM outperforms Core 2 Duo E8400 by a significant 29% based on our aggregated benchmark results.
Primary details
Comparing Core 2 Duo E8400 and Core i7-640LM processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2539 | 2369 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.86 | no data |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Core i7 |
| Architecture codename | Wolfdale (2008−2010) | Arrandale (2010−2011) |
| Release date | 1 January 2008 (16 years ago) | 4 January 2010 (14 years ago) |
| Launch price (MSRP) | no data | $332 |
| Current price | $67 | $192 (0.6x MSRP) |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core 2 Duo E8400 and Core i7-640LM 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 | 2 (Dual-core) | 2 (Dual-core) |
| Threads | 2 | 4 |
| Base clock speed | 3 GHz | 2.13 GHz |
| Boost clock speed | 3 GHz | 2.93 GHz |
| Bus support | no data | 2500 MHz |
| L1 cache | 64 KB (per core) | 128 KB |
| L2 cache | 6 MB (shared) | 512 KB |
| L3 cache | 0 KB | 4 MB |
| Chip lithography | 45 nm | 32 nm |
| Die size | 104 mm2 | 81+177 mm2 |
| Maximum core temperature | 72 °C | 105 °C |
| Maximum case temperature (TCase) | 72 °C | no data |
| Number of transistors | 410 million | 382+177 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Duo E8400 and Core i7-640LM 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 | LGA775 | BGA1288 |
| Power consumption (TDP) | 65 Watt | 25 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Duo E8400 and Core i7-640LM. 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 | - | + |
| FMA | no data | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | + |
| Hyper-Threading Technology | - | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | - | no data |
| PAE | no data | 36 Bit |
| FDI | no data | + |
| Fast Memory Access | no data | + |
| FSB parity | - | no data |
| Status | Discontinued | Discontinued |
Security technologies
Core 2 Duo E8400 and Core i7-640LM technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Duo E8400 and Core i7-640LM are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E8400 and Core i7-640LM. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR3-800, DDR3-1066 |
| Maximum memory size | no data | 8 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 17.1 GB/s |
| ECC memory support | no data | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | Intel® HD Graphics for Previous Generation Intel® Processors |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 566 MHz |
Graphics interfaces
Available interfaces and connections of Core 2 Duo E8400 and Core i7-640LM integrated GPUs.
| Number of displays supported | no data | 2 |
Peripherals
Specifications and connection of peripherals supported by Core 2 Duo E8400 and Core i7-640LM.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | no data | 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 i7-640LM outperforms Core 2 Duo E8400 by 29% 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 i7-640LM outperforms Core 2 Duo E8400 by 29% 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 i7-640LM outperforms Core 2 Duo E8400 by 1% 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 i7-640LM outperforms Core 2 Duo E8400 by 10% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 0.75 | 0.97 |
| Recency | 1 January 2008 | 4 January 2010 |
| Threads | 2 | 4 |
| Chip lithography | 45 nm | 32 nm |
| Power consumption (TDP) | 65 Watt | 25 Watt |
The Core i7-640LM is our recommended choice as it beats the Core 2 Duo E8400 in performance tests.
Note that Core 2 Duo E8400 is a desktop processor while Core i7-640LM is a notebook one.
Should you still have questions on choice between Core 2 Duo E8400 and Core i7-640LM, ask them in Comments section, and we shall answer.
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