Pentium 987 vs i5-2500K
Primary details
Comparing Core i5-2500K and Pentium 987 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1716 | not rated |
| 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 Pentium |
| Power efficiency | 2.58 | no data |
| Architecture codename | Sandy Bridge (2011−2013) | Sandy Bridge (2011−2013) |
| Release date | 9 January 2011 (13 years ago) | 1 February 2013 (11 years ago) |
| Launch price (MSRP) | $216 | $134 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i5-2500K and Pentium 987 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) | 2 (Dual-core) |
| Threads | 4 | 2 |
| Base clock speed | 3.3 GHz | 1.5 GHz |
| Boost clock speed | 3.7 GHz | 1.5 GHz |
| Bus type | no data | DMI 2.0 |
| Bus rate | 5 GT/s | 4 × 5 GT/s |
| Multiplier | no data | 15 |
| L1 cache | 64 KB (per core) | 128 KB |
| L2 cache | 256K (per core) | 512 KB |
| L3 cache | 6 MB (shared) | 2 MB (shared) |
| Chip lithography | 32 nm | 32 nm |
| Die size | 216 mm2 | 131 mm2 |
| Maximum core temperature | 73 °C | 100 °C |
| Number of transistors | 1,160 million | 504 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i5-2500K and Pentium 987 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 (Uniprocessor) |
| Socket | LGA1155 | FCBGA1023 |
| Power consumption (TDP) | 95 Watt | 17 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i5-2500K and Pentium 987. 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 |
| AES-NI | + | - |
| FMA | - | + |
| AVX | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | no data | - |
| Turbo Boost Technology | 2.0 | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | + |
| Demand Based Switching | no data | - |
| FDI | + | + |
| Fast Memory Access | + | + |
Security technologies
Core i5-2500K and Pentium 987 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| Identity Protection | + | - |
| Anti-Theft | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i5-2500K and Pentium 987 are enumerated here.
| VT-d | - | - |
| VT-x | + | - |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i5-2500K and Pentium 987. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 32 GB | 16.38 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 21 GB/s | 21.335 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 3000 | Intel® HD Graphics for 2nd Generation Intel® Processors |
| Quick Sync Video | + | - |
| Clear Video HD | + | - |
| Graphics max frequency | 1.1 GHz | 1 GHz |
| InTru 3D | + | - |
Graphics interfaces
Available interfaces and connections of Core i5-2500K and Pentium 987 integrated GPUs.
| Number of displays supported | 2 | 2 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| SDVO | no data | + |
| CRT | no data | + |
Peripherals
Specifications and connection of peripherals supported by Core i5-2500K and Pentium 987.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | 16 | 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.
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.
3DMark06 CPU
3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Cinebench 11.5 64-bit multi-core
Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.
Pros & cons summary
| Recency | 9 January 2011 | 1 February 2013 |
| Physical cores | 4 | 2 |
| Threads | 4 | 2 |
| Power consumption (TDP) | 95 Watt | 17 Watt |
i5-2500K has 100% more physical cores and 100% more threads.
Pentium 987, on the other hand, has an age advantage of 2 years, and 458.8% lower power consumption.
We couldn't decide between Core i5-2500K and Pentium 987. We've got no test results to judge.
Note that Core i5-2500K is a desktop processor while Pentium 987 is a notebook one.
Should you still have questions on choice between Core i5-2500K and Pentium 987, ask them in Comments section, and we shall answer.
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