i3-1305U vs i5-2500K
Aggregate performance score
Core i3-1305U outperforms Core i5-2500K by a whopping 113% based on our aggregate benchmark results.
Primary details
Comparing Core i5-2500K and Core i3-1305U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1718 | 1145 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.32 | no data |
| Market segment | Desktop processor | Laptop |
| Series | Core i5 (Desktop) | Intel Raptor Lake-U |
| Power efficiency | 2.59 | 34.92 |
| Architecture codename | Sandy Bridge (2011−2013) | Raptor Lake-U (2023) |
| Release date | 9 January 2011 (13 years ago) | 4 January 2023 (1 year ago) |
| Launch price (MSRP) | $216 | $309 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i5-2500K and Core i3-1305U 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) | 5 (Penta-Core) |
| Threads | 4 | 6 |
| Base clock speed | 3.3 GHz | 1.6 GHz |
| Boost clock speed | 3.7 GHz | 4.5 GHz |
| Bus rate | 5 GT/s | no data |
| L1 cache | 64 KB (per core) | 80K (per core) |
| L2 cache | 256K (per core) | 1.25 MB (per core) |
| L3 cache | 6 MB (shared) | 10 MB (shared) |
| Chip lithography | 32 nm | Intel 7 nm |
| Die size | 216 mm2 | no data |
| Maximum core temperature | 73 °C | 100 °C |
| Number of transistors | 1,160 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i5-2500K and Core i3-1305U 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 | LGA1155 | FCBGA1744 |
| Power consumption (TDP) | 95 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i5-2500K and Core i3-1305U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | - | + |
| TSX | - | + |
| Idle States | + | no data |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | + |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| Deep Learning Boost | - | + |
Security technologies
Core i5-2500K and Core i3-1305U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| Secure Key | no data | + |
| Identity Protection | + | - |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i5-2500K and Core i3-1305U are enumerated here.
| VT-d | - | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i5-2500K and Core i3-1305U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR5-5200, DDR4-3200, LPDDR4x-4267 |
| Maximum memory size | 32 GB | 96 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 21 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 3000 | Intel® UHD Graphics for 13th Gen Intel® Processors |
| Quick Sync Video | + | + |
| Clear Video HD | + | no data |
| Graphics max frequency | 1.1 GHz | 1.25 GHz |
| Execution Units | no data | 64 |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i5-2500K and Core i3-1305U integrated GPUs.
| Number of displays supported | 2 | 4 |
Graphics image quality
Maximum display resolutions supported by Core i5-2500K and Core i3-1305U 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 i5-2500K and Core i3-1305U 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 i5-2500K and Core i3-1305U.
| PCIe version | 2.0 | 4.0 |
| PCI Express lanes | 16 | 8 |
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 | 2.65 | 5.64 |
| Recency | 9 January 2011 | 4 January 2023 |
| Physical cores | 4 | 5 |
| Threads | 4 | 6 |
| Power consumption (TDP) | 95 Watt | 15 Watt |
i3-1305U has a 112.8% higher aggregate performance score, an age advantage of 11 years, 25% more physical cores and 50% more threads, and 533.3% lower power consumption.
The Core i3-1305U is our recommended choice as it beats the Core i5-2500K in performance tests.
Note that Core i5-2500K is a desktop processor while Core i3-1305U is a notebook one.
Should you still have questions on choice between Core i5-2500K and Core i3-1305U, ask them in Comments section, and we shall answer.
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