Core i5-1235U vs Core 2 Duo T6400
Aggregate performance score
Core i5-1235U outperforms Core 2 Duo T6400 by a whopping 1726% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Duo T6400 and Core i5-1235U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2940 | 908 |
| Place by popularity | not in top-100 | 18 |
| Market segment | Laptop | Laptop |
| Series | Intel Core 2 Duo | Intel Alder Lake-M |
| Power efficiency | 1.24 | 52.96 |
| Architecture codename | Penryn (2008−2011) | Alder Lake-U (2022) |
| Release date | 1 January 2009 (15 years ago) | 23 February 2022 (2 years ago) |
Detailed specifications
Core 2 Duo T6400 and Core i5-1235U 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) | 10 (Deca-Core) |
| Threads | 2 | 12 |
| Base clock speed | 2 GHz | 1.3 GHz |
| Boost clock speed | 2 GHz | 4.4 GHz |
| Bus rate | 800 MHz | no data |
| L1 cache | no data | 80K (per core) |
| L2 cache | 2 MB | 1.25 MB (per core) |
| L3 cache | 2 MB L2 Cache | 12 MB (shared) |
| Chip lithography | 45 nm | Intel 7 nm |
| Maximum core temperature | 105 °C | 100 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| VID voltage range | 1V-1.25V | no data |
Compatibility
Information on Core 2 Duo T6400 and Core i5-1235U 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 | no data | 1 |
| Socket | PGA478 | FCBGA1744 |
| Power consumption (TDP) | 35 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Duo T6400 and Core i5-1235U. 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 | - | + |
| FMA | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | + |
| TSX | - | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | - | no data |
| Deep Learning Boost | - | + |
Security technologies
Core 2 Duo T6400 and Core i5-1235U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Duo T6400 and Core i5-1235U are enumerated here.
| VT-d | no data | + |
| VT-x | - | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Duo T6400 and Core i5-1235U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR4, DDR5 |
| Maximum memory size | no data | 64 GB |
| Max memory channels | no data | 2 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® Iris® Xe Graphics eligible |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 1.2 GHz |
| Execution Units | no data | 80 |
Graphics interfaces
Available interfaces and connections of Core 2 Duo T6400 and Core i5-1235U integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Core 2 Duo T6400 and Core i5-1235U integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 4096 x 2304 @ 60Hz |
| Max resolution over eDP | no data | 4096 x 2304 @ 120Hz |
| Max resolution over DisplayPort | no data | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by Core 2 Duo T6400 and Core i5-1235U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12.1 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Core 2 Duo T6400 and Core i5-1235U.
| PCIe version | no data | 4.0 |
| 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.
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.
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.
Pros & cons summary
| Performance score | 0.46 | 8.40 |
| Recency | 1 January 2009 | 23 February 2022 |
| Physical cores | 2 | 10 |
| Threads | 2 | 12 |
| Power consumption (TDP) | 35 Watt | 15 Watt |
i5-1235U has a 1726.1% higher aggregate performance score, an age advantage of 13 years, 400% more physical cores and 500% more threads, and 133.3% lower power consumption.
The Core i5-1235U is our recommended choice as it beats the Core 2 Duo T6400 in performance tests.
Should you still have questions on choice between Core 2 Duo T6400 and Core i5-1235U, ask them in Comments section, and we shall answer.
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