Intel Core i7-10875H vs Intel Core i7-7800X Comparison

Head-to-Head Benchmarks

The benchmark data presents a clear and consistent picture: the Intel Core i7-10875H wins every single head-to-head comparison recorded in the database. Across eight distinct tests spanning Cinebench R15, R20, R23, and Geekbench, the mobile processor outperforms the desktop Core i7-7800X in both single-core and multi-core workloads. There are zero wins for the 7800X in these matchups.

The largest margin of victory comes in Geekbench single-core, where the 10875H scores 1384 against the 7800X's 1352, a delta of 2.3%. While this is the narrowest gap in the dataset, it still represents a measurable advantage in lightly threaded performance. The Geekbench multi-core test shows a wider spread: 6511 for the 10875H versus 6144 for the 7800X, a 5.6% lead.

The Cinebench results are remarkably consistent in their margins. In Cinebench R15 multi-core, the 10875H scores 1233 against 1113, a 9.7% advantage. Single-core in the same test shows 174 versus 156, a 10.3% lead. Moving to Cinebench R20, the multi-core score is 5138 for the 10875H versus 4638, again a 9.7% gap, while single-core is 725 versus 654, a 9.8% difference. Cinebench R23 follows the same pattern: multi-core 12234 versus 11044 (9.7% delta), single-core 1727 versus 1559 (9.7% delta).

The consistency of these deltas is notable. Across all three Cinebench versions, the multi-core advantage hovers around 9.7%, and single-core ranges between 9.7% and 10.3%. This suggests the performance gap is structural rather than workload-specific. The Geekbench margins are smaller, indicating that the 10875H's advantage compresses in certain integer-heavy tasks, but it never reverses.

The average benchmark score in the database reinforces this hierarchy: the 10875H averages 3432 across all recorded tests, while the 7800X averages 3333. Both processors sit at the 54th percentile of all CPUs in the database, meaning they occupy the same performance tier overall, but the 10875H sits at the top of that tier.

Architecture Differences

The two processors come from different architectural generations and target different market segments. The Core i7-7800X is a desktop part based on the Skylake-X architecture, using the 14 nm process node. It belongs to the Core i7 X-Series 7th Gen family and was released in June 2017. The Core i7-10875H is a mobile processor from the Comet Lake-H family, also on 14 nm, but released in April 2020. Both are manufactured by Intel and use the same process node, but the underlying designs differ substantially.

Core configuration is a major differentiator. The 7800X has 6 cores and 12 threads, while the 10875H has 8 cores and 16 threads. This 33% advantage in core count for the mobile part largely explains its multi-core dominance in Cinebench, where the delta is consistently around 9.7%, and in Geekbench multi-core at 5.6%. The 10875H also boosts higher: its boost clock reaches 5.10 GHz compared to 4.00 GHz for the 7800X. Base clocks tell the opposite story: 3.50 GHz for the desktop chip versus 2.30 GHz for the mobile chip, but the high boost clock allows the 10875H to pull ahead in single-core tests as well.

Cache hierarchies differ notably. The 7800X has 64 KB of L1 per core and 1 MB of L2 per core, with 8.25 MB of shared L3 cache. The 10875H also has 64 KB of L1 per core, but only 256 KB of L2 per core, while its L3 is 16 MB shared. The 10875H's L3 is nearly double that of the 7800X, which helps compensate for its smaller per-core L2. The die size is recorded only for the 10875H at 177.5 mm²; no die size is listed for the 7800X.

Memory architecture is another clear split. The 7800X supports quad-channel DDR4 with a memory bandwidth of 76.8 GB/s. The 10875H uses dual-channel DDR4 with a bandwidth of 46.9 GB/s. Despite having access to significantly more memory bandwidth, the 7800X still loses in multi-core tests, indicating that core count and clock speed matter more than memory throughput in these workloads. PCIe lane counts also differ: the 7800X provides 28 CPU lanes on Gen 3, while the 10875H provides 16 Gen 3 lanes.

The 10875H includes integrated UHD Graphics, while the 7800X has none. The 7800X has an unlocked multiplier, making it overclockable, while the 10875H is locked. Thermal design power is drastically different: 140 W for the 7800X versus 45 W for the 10875H. The 7800X uses the Intel Socket 2066 platform, while the 10875H is soldered to Intel BGA 1440. The 7800X is end-of-life production status, while the 10875H remains active.

Where Each One Wins

The data shows no benchmark wins for the 7800X in any recorded test. The 10875H wins all eight head-to-head comparisons. However, the database also provides context through average scores and nearest rivals that helps clarify where each processor might still serve a purpose.

The 7800X, despite losing to the 10875H, performs within 0.5% of the Intel Xeon D-1587 and within 0.7% of the Intel Core i5-11400T, according to its nearest rival data. Its average score of 3333 places it in the same tier as those processors. The 7800X's quad-channel memory support, with 76.8 GB/s bandwidth, is a unique feature in this comparison, and while it did not translate to benchmark wins, it remains a capability the 10875H lacks.

The 10875H's nearest rivals include the Intel Core i9-9880H with a delta of 0%, the AMD Ryzen 3 PRO 5350G at 0.3% ahead, the Intel Core i7-5960X at 0.3% ahead, and the AMD Ryzen 5 4600HS at 0.3% ahead. This places the 10875H in a tightly contested band where its 8-core, 16-thread configuration with a 5.10 GHz boost clock gives it an edge over the older 7800X.

For users prioritizing multi-threaded rendering workloads, the 10875H is the clear choice. Its 9.7% lead across all Cinebench multi-core tests is substantial and consistent. For single-threaded responsiveness, the 10875H also wins, with a 10.3% lead in Cinebench R15 single-core and 9.7% in R23. The only area where the 7800X might be considered is in memory bandwidth-sensitive applications, given its quad-channel support, but no benchmark in the database measures that directly.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i7-10875H has 8 cores and 16 threads, while the Intel Core i7-7800X has 6 cores and 12 threads.

Q: What is the performance difference in multi-core Cinebench R23?

A: The 10875H scores 12234 in Cinebench R23 multi-core, while the 7800X scores 11044. This gives the 10875H a 9.7% advantage.

Q: How do the boost clocks compare?

A: The 10875H boosts to 5.10 GHz, while the 7800X boosts to 4.00 GHz. The base clocks are 2.30 GHz for the 10875H and 3.50 GHz for the 7800X.

Q: Do both processors support the same memory configuration?

A: No. The 7800X supports quad-channel DDR4 with 76.8 GB/s bandwidth, while the 10875H supports dual-channel DDR4 with 46.9 GB/s bandwidth.

Q: Is the 7800X overclockable?

A: Yes, the 7800X has an unlocked multiplier. The 10875H does not, as its multiplier is locked.

Q: Which processor has integrated graphics?

A: The 10875H includes UHD Graphics. The 7800X does not have integrated graphics.

The Verdict

The recorded data leaves no ambiguity: the Intel Core i7-10875H is the superior processor in every benchmark test performed. It wins all eight head-to-head comparisons, with margins ranging from 2.3% in Geekbench single-core to 10.3% in Cinebench R15 single-core. The 10875H's advantage is most pronounced in multi-core workloads, where its 8 cores and 16 threads consistently outperform the 7800X's 6 cores and 12 threads by nearly 10% across all Cinebench versions.

The 7800X does have features the 10875H lacks: quad-channel memory with 76.8 GB/s bandwidth, an unlocked multiplier, and 28 PCIe Gen 3 lanes. But these capabilities did not translate into any benchmark victories. The 7800X is end-of-life, while the 10875H is active production. The 7800X also has a much higher TDP at 140 W versus 45 W for the 10875H, meaning it requires more power to achieve lower performance.

For anyone choosing between these two, the data points squarely to the 10875H. It is faster in single-core and multi-core, has more cores, a higher boost clock, more L3 cache, and integrated graphics. The only reasons to select the 7800X would be for its quad-channel memory bandwidth or its desktop socket, but the benchmark results show those advantages do not overcome its core and clock deficits. The 10875H is the better performer across the board.

Specification Differences

| Specification | Intel Core i7-7800X | Intel Core i7-10875H |

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

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base Clock | 3.50 GHz | 2.30 GHz |

| Boost Clock | 4.00 GHz | 5.10 GHz |

| TDP | 140 W | 45 W |

| Socket | Intel Socket 2066 | Intel BGA 1440 |

| Architecture | Skylake | Comet Lake |

| Codename | Skylake-X | Comet Lake-H |

| Generation | Core i7 (X-Series 7th Gen) | Core i7 (Comet Lake-H) |

| Die Size | Not recorded | 177.5 mm² |

| L2 Cache | 1 MB (per core) | 256 KB (per core) |

| L3 Cache | 8.25 MB (shared) | 16 MB (shared) |

| Memory Bus | Quad-channel | Dual-channel |

| Memory Bandwidth | 76.8 GB/s | 46.9 GB/s |

| PCIe Lanes | Gen 3, 28 Lanes (CPU only) | Gen 3, 16 Lanes (CPU only) |

| Integrated Graphics | None | UHD Graphics |

| Market Segment | Desktop | Mobile |

| Production Status | End-of-life | Active |

| Release Date | 2017-06-25 | 2020-04-01 |

| Multiplier Unlocked | Yes | No |

| Part Number | SR3L4 | SRJ8F |