Intel Core i7-870
Intel processor specifications and benchmark scores
At a Glance
IntelIntel Core i7-870 Specifications
Core i7-870 Core Configuration
Processing cores and threading
The Intel Core i7-870 features 4 physical cores and 8 threads, which directly impacts multi-threaded performance in CPU benchmarks. More cores allow the processor to handle parallel workloads efficiently, improving performance in video editing, 3D rendering, and multitasking scenarios. Thread count determines how many simultaneous tasks the CPU can process, with higher thread counts benefiting productivity applications and content creation workflows.
i7-870 Clock Speeds
Base and boost frequencies
Clock speed is a critical factor in Core i7-870 benchmark performance, measured in GHz. The base clock represents the guaranteed operating frequency, while the boost clock indicates maximum single-core performance under optimal conditions. Higher clock speeds translate to faster single-threaded performance, which is essential for gaming and applications that don't fully utilize multiple cores. The Core i7-870 by Intel can dynamically adjust its frequency based on workload and thermal headroom.
Intel's Core i7-870 Cache Hierarchy
L1, L2, L3 cache sizes
Cache memory is ultra-fast storage built directly into the i7-870 processor die. L1 cache provides the fastest access for frequently used data, while L2 and L3 caches offer progressively larger storage with slightly higher latency. Larger cache sizes significantly improve CPU benchmark scores by reducing memory access times. The Core i7-870's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.
Nehalem Architecture & Process
Manufacturing and design details
The Intel Core i7-870 is built on Intel's 45 nm manufacturing process, which determines power efficiency and thermal characteristics. Smaller process nodes allow for more transistors in the same space, enabling higher performance per watt. The architecture defines how the processor handles instructions and manages data flow, directly impacting benchmark results across different workload types. Modern CPU architectures like the one in i7-870 incorporate advanced branch prediction and out-of-order execution for optimal performance.
Nehalem Instruction Set Features
Supported CPU instructions and extensions
The Core i7-870 by Intel supports various instruction set extensions that enable optimized performance for specific workloads. SIMD instructions like SSE and AVX accelerate multimedia, scientific computing, and AI workloads by processing multiple data points simultaneously. Features like AES-NI provide hardware-accelerated encryption, while AVX-512 (if supported) enables advanced vector processing for data centers and high-performance computing. These instruction sets are critical for software compatibility and performance in modern applications.
Power & Thermal
TDP and power specifications
The Intel Core i7-870 has a TDP (Thermal Design Power) of 95W, indicating the cooling solution required for sustained operation. TDP affects both system power consumption and the type of cooler needed. Lower TDP processors are ideal for compact builds and laptops, while higher TDP chips typically offer better sustained performance in demanding CPU benchmarks. Understanding power requirements helps ensure your system can deliver consistent performance without thermal throttling.
Intel Socket 1156 Platform & Socket
Compatibility information
The Core i7-870 uses the Intel Socket 1156 socket, which determines motherboard compatibility. Choosing the right platform is essential for building a system around this processor. The socket type also influences available features like PCIe lanes, memory support, and upgrade paths. When comparing CPU benchmarks, ensure you're looking at processors compatible with your existing or planned motherboard to make informed purchasing decisions.
Intel Socket 1156 Memory Support
RAM compatibility and speeds
Memory support specifications for the i7-870 define which RAM types and speeds are compatible. Faster memory can significantly improve CPU benchmark performance, especially in memory-intensive applications and gaming. The memory controller integrated into the Core i7-870 determines maximum supported speeds and channels. Dual-channel or quad-channel memory configurations can double or quadruple memory bandwidth, providing noticeable performance gains in content creation and scientific workloads.
Product Information
Release and pricing details
The Intel Core i7-870 is manufactured by Intel and represents their commitment to delivering competitive CPU performance. Understanding the release date and pricing helps contextualize benchmark comparisons with other processors from the same generation. Launch pricing provides a baseline for evaluating value, though street prices often differ. Whether you're building a new system or upgrading, the Core i7-870 by Intel offers a specific balance of performance, features, and cost within Intel's product lineup.
About Intel Core i7-870
The Intel Core i7-870 is a desktop processor from Intel’s Lynnfield generation, built on the 45 nm Nehalem architecture. It ships with 4 cores and 8 threads, a base clock of 2.93 GHz, and a boost clock of 3.60 GHz, all within a 95 W TDP. Released on 2009-09-07, it is now end-of-life. Benchmark data shows an average score of 924, placing it in the 24th percentile of all CPUs tracked. This places it in the lower quartile of performance, a reflection of its age and limited core count by modern standards.
Platform and Compatibility
The Core i7-870 uses the Intel Socket 1156, a platform that was short-lived and has no modern upgrade path. It supports DDR3 memory in a dual-channel configuration, with no ECC capability. The memory bus is dual-channel, meaning two sticks of RAM are used for optimal bandwidth, though the specific bandwidth figure is not listed. The processor provides PCIe Gen 2 with 16 lanes from the CPU itself; there is no integrated graphics, so a discrete GPU is mandatory for any display output. The chip is built on a 45 nm process with 774 million transistors on a 296 mm² die. Cache is organized as 64 KB of L1 per core, 256 KB of L2 per core, and 8 MB of shared L3 cache. The multiplier is locked, so overclocking is not officially supported. The platform is firmly legacy: DDR3 memory and Socket 1156 motherboards are no longer produced, and the CPU’s end-of-life status means no firmware or feature updates are forthcoming. For anyone building a new system, this is not a viable foundation; for those maintaining an existing 1156 system, the i7-870 remains a functional but dated option.
Who Should Consider It
Given its benchmark scores, the i7-870 is suitable for basic office tasks, light web browsing, and legacy software that does not demand high multi-core throughput. The Cinebench R23 multi-core score of 2686 and single-core score of 379 indicate that it can handle single-threaded applications reasonably well for its era, but it will struggle with modern multi-threaded workloads such as video editing, 3D rendering, or complex data analysis. In gaming, the CPU’s 4 cores and 8 threads are sufficient for older titles, but contemporary games that rely on high single-thread performance or more than four physical cores will likely bottleneck. The 24th percentile ranking reinforces this: the i7-870 outperforms only about a quarter of all CPUs in the database. Users who need a cheap, functional processor for a secondary machine—like a home server, a retro gaming rig, or a basic office PC—may find it adequate, provided the rest of the system uses compatible DDR3 memory and a discrete GPU. However, anyone seeking performance for modern productivity or gaming should look elsewhere, as the data shows it falls far behind even low-power mobile parts from later generations.
Benchmark Performance
The benchmark results paint a clear picture of the i7-870’s position. In Cinebench R15 multi-core, it scores 270; in R20 multi-core, 1128; and in R23 multi-core, 2686. Single-core scores are 159 (R20) and 379 (R23). These numbers are low relative to contemporary CPUs, but they do show a consistent scaling pattern: the R23 multi-core score is roughly seven times the single-core score, indicating that the 8 threads are utilized effectively when the workload is parallel. The average benchmark score across all tests is 924, which is the basis for comparison with its nearest rivals. The i7-870 is 0.3% slower than the Intel Core i7-4600U (average score 927), 0.3% faster than the AMD FX-4320 (921), 0.4% slower than the Intel Core i5-2400S (928), and 0.5% faster than the AMD PRO A10-9700E (919). These deltas are negligible—well within run-to-run variance—so in practice the i7-870 trades blows with these older mid-range parts. The 24th percentile ranking confirms that it is not competitive with modern mainstream processors; for context, a CPU in the 50th percentile would have an average score significantly higher, though exact figures are not provided. The performance data suggests the i7-870 is best viewed as a historical artifact rather than a current workhorse.
FAQ
Q: What socket does the Intel Core i7-870 use?
A: It uses Intel Socket 1156.
Q: Does the i7-870 support ECC memory?
A: No, ECC memory is not supported.
Q: What is the boost clock speed?
A: The boost clock is 3.60 GHz, with a base clock of 2.93 GHz.
Q: How many threads does the i7-870 have?
A: It has 8 threads, with 4 physical cores.
Q: Is the multiplier unlocked for overclocking?
A: No, the multiplier is locked.
Q: What is the process node?
A: The processor is built on a 45 nm process, with 774 million transistors.
How It Compares
vs. Intel Core i7-4600U: The i7-870 trails the i7-4600U by a mere 0.3% in average benchmark score (924 vs. 927). The i7-4600U is a low-power mobile chip, yet it matches the desktop i7-870 in overall performance, highlighting how far desktop CPUs have fallen behind mobile efficiency.
vs. AMD FX-4320: The i7-870 edges out the FX-4320 by 0.3% (924 vs. 921). The FX-4320 is a 4-core AMD part from a later era, and the near-tie shows that the i7-870’s architecture still holds its own against some later budget offerings.
vs. Intel Core i5-2400S: The i7-870 is 0.4% slower than the i5-2400S (924 vs. 928). The i5-2400S is a Sandy Bridge part with a lower TDP, yet it slightly outperforms the older Nehalem chip in the aggregate benchmark. This gap is trivial, but it does indicate that the i5-2400S is a marginally stronger choice for similar workloads.
vs. AMD PRO A10-9700E: The i7-870 leads the PRO A10-9700E by 0.5% (924 vs. 919). The A10-9700E is an AMD APU with integrated graphics, but in pure CPU performance, the i7-870 holds a slight advantage, despite the A10’s newer process node.
Single-Thread vs Multi-Thread Behavior
The Cinebench R23 results—single-core 379, multi-core 2686—reveal a strong scaling factor: the multi-core score is approximately 7.1 times the single-core score. This indicates that the 8 threads are well-utilized when a workload can be parallelized, as is typical for rendering or encoding tasks. However, the absolute values are low. A single-core score of 379 means that lightly threaded applications, such as many legacy games or office software, will run at a level comparable to a low-end modern laptop CPU. The multi-core score of 2686, while better, still places it far below any contemporary desktop chip. The split suggests that the i7-870 is more capable in multi-threaded scenarios than in single-threaded ones, but both are constrained by the Nehalem architecture’s age. For users who run a mix of single- and multi-threaded tasks, the CPU will feel sluggish in single-threaded workloads, but it can handle modest parallel tasks without collapsing. In practice, the 4-core/8-thread design offers a decent balance for its time, but the 24th percentile ranking makes it clear that this balance is now heavily tilted toward obsolescence.
Detailed benchmark scores and charts for the Intel Core i7-870 are below.
Benchmark Scores
cinebench_cinebench_r15_multicoreSource
Cinebench R15 multi-core renders a complex 3D scene using all CPU threads simultaneously. This test reveals how Intel Core i7-870 performs in parallel rendering workloads like video production and 3D animation. The R15 version remains useful for comparing against older hardware benchmarks. Higher scores directly correlate with faster render times in Cinema 4D and similar 3D applications.
Top 5 Performers
Top 5 PerformersNearby Performers
Nearby Performerscinebench_cinebench_r20_multicoreSource
Cinebench R20 multi-core uses a scene requiring 4x more computational power than R15. This test better reflects modern CPU capabilities for professional rendering on Intel Core i7-870. The more demanding workload provides better differentiation between current-generation processors.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r20_singlecoreSource
Cinebench R20 single-core tests one thread against a more demanding scene than R15. This reveals the true single-thread rendering capability of Intel Core i7-870. The increased complexity provides more accurate performance differentiation between modern CPUs.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r23_multicoreSource
Cinebench R23 multi-core is the current standard for CPU rendering benchmarks with a 10-minute minimum runtime. This extended test reveals sustained performance of Intel Core i7-870 after thermal limits kick in. The longer duration exposes cooling limitations that shorter benchmarks miss.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r23_singlecoreSource
Cinebench R23 single-core measures sustained single-thread performance over 10 minutes. This reveals how Intel Core i7-870 maintains boost clocks under continuous load. The extended runtime shows whether thermal throttling affects single-core performance.
Top 5 Performers
Nearby Performers
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