Intel Core i7-12700H vs Intel Core i9-9900K Comparison

The Intel Core i9-9900K and Intel Core i7-12700H represent two distinct generations of Intel design, but their benchmark results reveal a surprisingly one-sided contest. Despite the i9-9900K’s desktop pedigree and higher boost clock, the mobile i7-12700H dominates the majority of workloads, winning 14 of 17 head-to-head comparisons. The data shows a clear generational shift in performance, with the newer Alder Lake architecture proving its superiority in almost every measurable category.

Head-to-Head Benchmarks

The most striking result is in Cinebench R15 multicore, where the i7-12700H scores 2604.6 against the i9-9900K’s 1545, a 40.7% advantage. This gap is not a fluke — it mirrors similar margins in other heavily threaded tests. In PassMark multithread, the i7-12700H posts 25615 versus 18153, a 29.1% lead. PassMark physics shows a 38.2% delta (1512 vs 934), and PassMark floating point math lands at 65075 vs 41036, a 36.9% edge. The i7-12700H’s 14 cores and 20 threads simply overwhelm the i9-9900K’s 8 cores and 16 threads in parallel workloads.

The encryption results are the most lopsided of the entire comparison. In PassMark data encryption, the i7-12700H scores 17575, which is 63.4% higher than the i9-9900K’s 6430. Similarly, PassMark find prime numbers shows the i7-12700H at 94 versus 47, a 50% advantage. These suggest architectural improvements in the newer chip’s integer and cryptographic instruction handling, not just raw core count.

Single-threaded performance is more nuanced. The i9-9900K actually wins Cinebench R23 single-core with a score of 2164, beating the i7-12700H’s 1782 by 21.4%. This is a notable victory for the older chip, likely attributed to its 5.00 GHz boost clock versus the i7-12700H’s 4.70 GHz. However, this win is an outlier. In PassMark single-thread, the i7-12700H takes the lead with 3535 versus 2919, a 17.4% margin. In Cinebench R15 single-core, the i7-12700H wins 256 to 217 (15.2% ahead), and in Cinebench R20 single-core, it wins 1259 to 908 (27.9% ahead). The i9-9900K’s R23 single-core victory stands alone against a broader trend of i7-12700H superiority in single-threaded tasks.

Other wins for the i7-12700H include PassMark data compression (300594 vs 283506, 5.7% ahead) and PassMark integer math (90106 vs 66134, 26.6% ahead). The i9-9900K manages two additional wins beyond R23 single-core: PassMark extended instructions at 18965 versus 17886 (6% ahead) and PassMark random string sorting at 36238 versus 33449 (8.3% ahead). These two wins suggest the i9-9900K retains an edge in specific niche instruction sets, but they do little to offset the i7-12700H’s overwhelming overall dominance.

FAQ

Q: Which CPU has the higher average benchmark score?

A: The i9-9900K has a slightly higher average benchmark score of 27097, compared to the i7-12700H’s 26717. Both CPUs sit at the 79th percentile among all CPUs, indicating they are statistically equivalent in overall performance despite the i7-12700H winning more individual tests.

Q: Does the i7-12700H outperform the i9-9900K in all Cinebench tests?

A: No. The i7-12700H wins in Cinebench R15 multicore (2604.6 vs 1545), R15 single-core (256 vs 217), R20 multicore (8921 vs 6439), and R20 single-core (1259 vs 908). However, the i9-9900K wins in Cinebench R23 single-core (2164 vs 1782).

Q: How does the core count differ between the two processors?

A: The i9-9900K has 8 cores and 16 threads, while the i7-12700H has 14 cores and 20 threads. The i7-12700H also has a larger L3 cache (24 MB shared) compared to the i9-9900K (16 MB shared).

Q: Which processor has a higher boost clock speed?

A: The i9-9900K has a boost clock of 5.00 GHz, which is higher than the i7-12700H’s 4.70 GHz. The i9-9900K also has a higher base clock at 3.60 GHz versus the i7-12700H’s 2.30 GHz.

Q: What are the process node differences?

A: The i9-9900K is built on Intel’s 14 nm process with a die size of 180.3 mm². The i7-12700H uses Intel’s 10 nm process with a larger die size of 217 mm².

Q: Is the i9-9900K’s memory bandwidth superior?

A: The i9-9900K has a specified memory bandwidth of 42.7 GB/s, while the i7-12700H’s memory bandwidth is not listed in the data. Both support dual-channel memory, but the i7-12700H supports both DDR4 and DDR5, whereas the i9-9900K supports only DDR4.

Architecture Differences

The architectural divide between these two chips is substantial. The i9-9900K uses the Coffee Lake architecture (specifically Coffee Lake-R) on a 14 nm process, while the i7-12700H uses the Alder Lake architecture (Alder Lake-H) on a 10 nm process. This process shrink is a major factor in the performance delta, as it allows for more transistors in a similar power envelope.

The core configurations differ fundamentally. The i9-9900K is a monolithic 8-core, 16-thread design. The i7-12700H is a hybrid 14-core, 20-thread design, which in the Alder Lake architecture typically combines performance and efficiency cores, though the fact pack does not specify the exact P-core/E-core split. The i7-12700H’s L1 cache is 80 KB per core, compared to the i9-9900K’s 64 KB per core, and its L2 cache is 1.25 MB per core versus 256 KB per core. The L3 cache also grows from 16 MB to 24 MB.

Platform support moves forward as well. The i9-9900K uses Intel Socket 1151 with PCIe Gen 3 (16 lanes CPU-only), while the i7-12700H uses Intel BGA 1744 with PCIe Gen 4 (20 lanes CPU-only). The i7-12700H also adds DDR5 memory support alongside DDR4, whereas the i9-9900K is limited to DDR4. Integrated graphics differ too: the i9-9900K has UHD Graphics 630, while the i7-12700H has Iris Xe 96EU, which is a more powerful iGPU solution.

Thermal and power characteristics also diverge sharply. The i9-9900K has a TDP of 95W and is a desktop part with an unlocked multiplier. The i7-12700H is a mobile chip with a 45W TDP and a locked multiplier. The i7-12700H’s lower TDP makes its performance advantage even more impressive, as it achieves higher scores while consuming less than half the thermal budget. The i9-9900K is end-of-life, while the i7-12700H remains active in production.

The Verdict

From the data alone, the Intel Core i7-12700H is the superior processor for virtually all compute-heavy tasks. It wins 14 of 17 head-to-head benchmarks, including decisive victories in multicore rendering (Cinebench R15, R20, R23), encryption, and integer math. Its 14 cores and 20 threads provide a raw throughput advantage that the i9-9900K cannot match, despite the older chip’s higher clock speeds. Users who prioritize multi-threaded workloads — video encoding, 3D rendering, data processing — should select the i7-12700H without hesitation.

The i9-9900K retains a narrow niche. Its 21.4% win in Cinebench R23 single-core suggests it can still compete in lightly threaded legacy workloads. It also wins in extended instructions and random string sorting, indicating some specialized instruction-level strengths. For users on a desktop platform who require the unlocked multiplier for overclocking, the i9-9900K offers flexibility that the locked i7-12700H cannot provide. However, the i7-12700H’s 17.4% lead in PassMark single-thread and its massive multi-core margins make it the better all-rounder.

The average benchmark scores tell a similar story: the i9-9900K’s 27097 average is only 1.4% higher than the i7-12700H’s 26717, a negligible difference. Both sit at the 79th percentile. But the distribution of wins matters more than the average. The i7-12700H delivers a more consistent and modern performance profile, with its 10 nm process and DDR5 support providing a future-proofing advantage. The i9-9900K, while still capable, is an end-of-life product that only makes sense for users with specific single-threaded or overclocking needs on an existing LGA 1151 platform.

Specification Differences

| Specification | Intel Core i9-9900K | Intel Core i7-12700H |

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

| Cores | 8 | 14 |

| Threads | 16 | 20 |

| Base Clock | 3.60 GHz | 2.30 GHz |

| Boost Clock | 5.00 GHz | 4.70 GHz |

| TDP | 95 W | 45 W |

| Socket | Intel Socket 1151 | Intel BGA 1744 |

| Architecture | Coffee Lake | Alder Lake |

| Process Node | 14 nm | 10 nm |

| Die Size | 180.3 mm² | 217 mm² |

| L1 Cache | 64 KB (per core) | 80 KB (per core) |

| L2 Cache | 256 KB (per core) | 1.25 MB (per core) |

| L3 Cache | 16 MB (shared) | 24 MB (shared) |

| Memory Support | DDR4 | DDR4, DDR5 |

| Memory Bandwidth | 42.7 GB/s | Not specified |

| PCIe | Gen 3, 16 Lanes (CPU only) | Gen 4, 20 Lanes (CPU only) |

| Integrated Graphics | UHD Graphics 630 | Iris Xe 96EU |

| Market Segment | Desktop | Mobile |

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

| Multiplier Unlocked | Yes | No |

| Launch MSRP | $488 | Not specified |