Intel Core i7-870S vs Intel Pentium Silver J5040 Comparison

Intel Pentium Silver J5040 vs Intel Core i7-870S: a 2019-era 10-watt mobile chip against a 2010-era 82-watt desktop part. The benchmark data is unambiguous across every Cinebench test: the Pentium Silver J5040 wins all five head-to-head comparisons, with deltas between 16.5% and 16.9%. The Core i7-870S, despite its hyper-threading and much higher TDP, never takes a single victory. This is a case where architectural age matters more than raw power budget, and the numbers below show exactly why.

Head-to-Head Benchmarks

The most decisive win for the Pentium Silver J5040 comes in Cinebench R15 multi-core, where it scores 276 against the Core i7-870S’s 236, a 16.9% advantage. That gap is consistent across the entire benchmark suite. In Cinebench R20 multi-core, the J5040 posts 1150 versus 987, a 16.5% lead. The single-core tests tell the same story: R20 single-core shows 162 against 139 (16.5% ahead), and R23 single-core shows 386 against 331 (16.6% ahead). The R23 multi-core result mirrors that exactly, with 2739 versus 2350, a 16.6% margin.

What is notable is the uniformity of the gap. Whether the workload is single-threaded or fully threaded, the J5040’s lead hovers near 16.5–16.9%. That suggests the Pentium’s advantage is not about core count or thread scheduling — both parts have four physical cores — but rather about per-core efficiency and IPC improvements over the nine-year gap in release dates. The Core i7-870S has eight threads to the J5040’s four, yet it still loses multi-core tests by the same margin as single-core. The extra threads do not translate into a win anywhere.

Looking at the broader benchmark landscape, the J5040’s average benchmark score is 801, placing it at the 21st percentile of all CPUs. The i7-870S averages 809, which is the 22nd percentile. These are nearly identical overall standings, with the i7-870S actually holding a 1% higher average score in the aggregate database, despite losing every direct Cinebench comparison. That discrepancy is worth noting — it likely reflects the i7-870S having a wider set of benchmark submissions outside Cinebench, but within this head-to-head data, the Pentium is clearly faster.

The nearest rivals for the J5040 include the AMD A10-7700K at an identical 801 average score (0% delta), the Intel Xeon E5530 also at 801 (0%), and the Intel Core i5-3320M at 803 (-0.2%). For the i7-870S, its nearest rivals are the AMD A10-6800K at 809 (0%), the AMD Athlon X4 850 at 806 (0.4% slower), and the Intel Xeon X5482 at 805 (0.4% slower). Both CPUs sit in a crowded performance tier where a few points separate many older parts.

Architecture Differences

The Pentium Silver J5040 is built on Intel’s Goldmont Plus architecture, codenamed Gemini Lake, using a 14nm process. It has 4 cores and 4 threads, with a base clock of 2000 MHz and a boost clock of 3.20 GHz. The cache layout is 56 KB of L1 per core and 4 MB of shared L2, with no L3 cache. The die size is 93 mm². Memory support is DDR4 over a dual-channel bus with a measured bandwidth of 38.4 GB/s. It uses PCIe Gen 2 with 6 lanes from the CPU and includes integrated UHD Graphics 605. The TDP is 10 watts, and it is classified as a mobile part on the Intel BGA 1090 socket.

The Core i7-870S is a much older design, based on the Nehalem architecture, codenamed Lynnfield, on a 45nm process. It also has 4 cores but doubles the threads to 8 via hyper-threading. The base clock is higher at 2.67 GHz, with a boost to 3.60 GHz. Cache is more generous per core: 64 KB L1 and 256 KB L2 per core, plus a shared 8 MB L3. The die is significantly larger at 296 mm² and contains 774 million transistors. Memory support is DDR3 on a dual-channel bus, though the fact pack lists no bandwidth figure. PCIe is Gen 2 with 16 lanes. There is no integrated graphics. The TDP is 82 watts — more than eight times that of the J5040 — and it uses the Intel Socket 1156. It is a desktop part.

The core architectural delta is stark: 14nm versus 45nm, Goldmont Plus versus Nehalem, 10W versus 82W, and a 93 mm² die versus 296 mm². The i7-870S compensates for its older node with higher clocks and hyper-threading, but the data shows those advantages do not overcome the newer instruction set and IPC of the Pentium. The J5040 achieves its benchmark wins with a fraction of the power draw and a fraction of the die area.

Where Each One Wins

Based strictly on the head-to-head benchmark data, the Pentium Silver J5040 wins every single workload category tested. That includes both single-core and multi-core Cinebench R20 and R23, plus multi-core R15. There is no test in this comparison where the Core i7-870S comes out ahead. The J5040’s victories range from 16.5% to 16.9%, which is a meaningful margin for any application that relies on CPU throughput.

The Core i7-870S does have structural advantages that the benchmarks do not capture. It supports DDR3 memory, which may be more readily available for older systems, and it has 16 PCIe Gen 2 lanes versus 6 on the J5040 — relevant for systems needing more expansion slots or higher-bandwidth add-in cards. It also has 8 threads, which could theoretically help in highly parallel workloads that scale well beyond 4 threads, but the Cinebench multi-core results show that the i7-870S’s thread advantage does not produce a win. The i7-870S also has a larger L3 cache (8 MB shared) versus none on the J5040, but again, the benchmark results do not reflect any benefit.

For power-sensitive or compact builds, the J5040 is the obvious choice. Its 10W TDP means it can be cooled by a passive or small fan solution, and its BGA 1090 socket is designed for soldered, low-power mobile boards. The i7-870S, at 82W, requires a serious cooler and a full desktop platform. The J5040 also includes integrated graphics, so no separate GPU is needed for basic display output, whereas the i7-870S requires a discrete graphics card.

The Verdict

The data is clear: the Intel Pentium Silver J5040 outperforms the Intel Core i7-870S in every Cinebench benchmark recorded here. The margin is consistent and significant, around 16.5% to 16.9% across single-core and multi-core tests. If the only consideration is raw CPU benchmark performance, the J5040 is the better processor, despite being a low-power mobile chip.

Who should pick the J5040? Anyone building a low-power, fanless, or embedded system where CPU performance is secondary to energy efficiency and silent operation. Its 10W TDP and integrated UHD Graphics 605 make it suitable for basic desktop tasks, media playback, or lightweight server roles. The 14nm process and newer architecture deliver better performance per watt by an enormous margin.

Who should pick the Core i7-870S? Only those who need its specific platform features: the LGA 1156 socket, 16 PCIe lanes, or DDR3 memory support for an existing motherboard. If you already own a compatible board and RAM, the i7-870S would be a drop-in upgrade path, but its 82W TDP and inferior benchmark scores make it hard to recommend for any new build. The fact that it has 8 threads does not rescue it in any test here.

The overall average benchmark scores are close — 801 for the J5040 versus 809 for the i7-870S — but the head-to-head Cinebench data favors the Pentium in every category. The i7-870S holds a 22nd percentile ranking versus 21st for the J5040, but that 1% aggregate difference is not reflected in direct comparisons. For new purchases, the J5040 is the stronger part.

FAQ

Q: Which CPU is faster in multi-core workloads?

A: The Pentium Silver J5040 wins all multi-core tests. In Cinebench R23 multi-core, it scores 2739 versus 2350 for the Core i7-870S, a 16.6% lead. In R20 multi-core, it leads 1150 to 987 (16.5%), and in R15 multi-core, 276 to 236 (16.9%).

Q: Does the Core i7-870S win any benchmark?

A: No. Across all five head-to-head Cinebench tests (R15 multi-core, R20 multi-core, R20 single-core, R23 multi-core, R23 single-core), the Pentium Silver J5040 wins every one. The i7-870S records zero wins.

Q: How do their average benchmark scores compare?

A: The Pentium Silver J5040 has an average benchmark score of 801, placing it at the 21st percentile of all CPUs. The Core i7-870S averages 809, placing it at the 22nd percentile. The delta is 1% in favor of the i7-870S, despite losing all direct comparisons.

Q: What are the TDP differences?

A: The Pentium Silver J5040 has a TDP of 10 watts. The Core i7-870S has a TDP of 82 watts. That is an 8x difference in power draw, with the lower-power chip being faster in every benchmark.

Q: Do both CPUs have the same number of cores?

A: Both have 4 physical cores. The Core i7-870S has 8 threads via hyper-threading, while the Pentium Silver J5040 has 4 threads (one per core). The thread advantage does not produce a benchmark win for the i7-870S.

Q: What is the process node difference?

A: The Pentium Silver J5040 uses a 14nm process, while the Core i7-870S uses a 45nm process. The die sizes are 93 mm² for the J5040 and 296 mm² for the i7-870S.

Specification Differences

| Specification | Intel Pentium Silver J5040 | Intel Core i7-870S |

|---|---|---|

| Threads | 4 | 8 |

| Base Clock | 2000 MHz | 2.67 GHz |

| Boost Clock | 3.20 GHz | 3.60 GHz |

| TDP | 10 W | 82 W |

| Socket | Intel BGA 1090 | Intel Socket 1156 |

| Architecture | Goldmont Plus | Nehalem |

| Codename | Gemini Lake | Lynnfield |

| Process Node | 14 nm | 45 nm |

| Transistors | Not specified | 774 million |

| Die Size | 93 mm² | 296 mm² |

| L1 Cache | 56 KB (per core) | 64 KB (per core) |

| L2 Cache | 4 MB (shared) | 256 KB (per core) |

| L3 Cache | None | 8 MB (shared) |

| Memory Support | DDR4 | DDR3 |

| Memory Bandwidth | 38.4 GB/s | Not specified |

| PCIe | Gen 2, 6 Lanes | Gen 2, 16 Lanes |

| Integrated Graphics | UHD Graphics 605 | None |

| Market Segment | Mobile | Desktop |

| Release Date | 2019-11-03 | 2010-07-18 |

| Launch MSRP | $161 | Not specified |

| Part Number | SRFDB | SLBQ7 |