Intel Core 9 270H vs Intel Core i9-12900K Comparison

The Intel Core 9 270H and Intel Core i9-12900K are separated by just 0.1% in average benchmark score — 42816 vs 42781 — yet head-to-head results tell a different story. The desktop 12900K wins 15 of 17 direct comparisons, often by margins from 12.3% to 35.3%, while the mobile 270H counters with a single-thread Passmark win. This is a tale of two sockets, two power envelopes, and two very different performance profiles.

The Verdict

The data is unambiguous for raw compute: the Intel Core i9-12900K is the faster processor in almost every measurable workload. Across the 17 head-to-head benchmarks, it claims 15 victories, with the Core 9 270H taking only the Passmark single-thread test (4404 vs 4136, a 6.5% advantage) and its duplicate. The 12900K leads by 23.3% in every Cinebench R15, R20, and R23 test — both single- and multi-core — and by even larger margins in Passmark's data compression (32.2%), extended instructions (35.3%), and random string sorting (28.4%). For anyone building a desktop system where performance is the sole criterion, the 12900K is the clear pick.

However, the 270H is a mobile part, rated at a 45W TDP versus the 12900K's 125W, and it fits the Intel BGA 1744 socket. Its 5.80 GHz boost clock is higher than the 12900K's 5.20 GHz, and it wins the Passmark single-thread test outright. If you need a laptop CPU that delivers near-desktop-class average performance — the two chips sit within 0.1% of each other in overall benchmark score — the 270H is the sensible choice. The 12900K, with its 16 cores, 24 threads, and 30 MB of L3 cache, is the performance king, but it is a desktop-only component. The verdict: choose the 12900K for maximum throughput, choose the 270H for a mobile platform that still posts competitive numbers.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-12900K has 16 cores and 24 threads, while the Intel Core 9 270H has 14 cores and 20 threads.

Q: What are the boost clock speeds?

A: The Core 9 270H boosts to 5.80 GHz, while the Core i9-12900K boosts to 5.20 GHz.

Q: How do they compare in Cinebench R23?

A: The 12900K scores 35031 in multi-core and 4945 in single-core, versus 26861 and 3792 for the 270H — a 23.3% advantage for the 12900K in both tests.

Q: Does the Core 9 270H ever beat the 12900K?

A: Yes, in the Passmark single-thread test, the 270H scores 4404 against the 12900K's 4136, a 6.5% lead.

Q: What are the TDP ratings?

A: The 270H has a 45W TDP, while the 12900K has a 125W TDP.

Q: Which processor has a higher average benchmark score?

A: The 270H averages 42816, and the 12900K averages 42781 — a difference of just 0.1%.

Architecture Differences

Both chips are built on Intel's 10nm process and use the same foundry, but they come from different architectural families. The Core 9 270H is based on Raptor Lake, specifically the Raptor Lake-H mobile variant, while the Core i9-12900K is Alder Lake-S for desktop. This distinction shows up in cache geometry: the 270H has 2 MB of L2 per core, double the 1.25 MB per core on the 12900K, but the 12900K has 30 MB of shared L3 versus 24 MB on the 270H. L1 cache is identical at 80 KB per core.

The integrated graphics differ as well. The 270H carries Iris Xe Graphics with 96 execution units, while the 12900K uses UHD Graphics 770. Memory support is the same — both accept DDR4 and DDR5 in dual-channel mode — but the 12900K adds ECC support, which the 270H lacks. PCIe connectivity is also asymmetric: the 270H provides Gen 5 with 8 CPU lanes, while the 12900K offers Gen 5 with 16 CPU lanes. The 12900K's die size is listed at 215 mm², while the 270H has no die size figure in the data.

The sockets are entirely different: the 270H is soldered to Intel BGA 1744, a mobile package, whereas the 12900K uses the LGA Socket 1700 for desktop motherboards. The 12900K also has an unlocked multiplier, allowing overclocking, while the 270H's multiplier is locked. These architectural choices reflect their intended markets: a power-efficient mobile part versus a high-performance desktop flagship.

Specification Differences

| Specification | Intel Core 9 270H | Intel Core i9-12900K |

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

| Cores | 14 | 16 |

| Threads | 20 | 24 |

| Base Clock | 2.70 GHz | 3.20 GHz |

| Boost Clock | 5.80 GHz | 5.20 GHz |

| TDP | 45 W | 125 W |

| Socket | Intel BGA 1744 | Intel Socket 1700 |

| Architecture | Raptor Lake | Alder Lake |

| Generation | Core 9 (Raptor Lake Refresh) | Core i9 (Alder Lake-S) |

| Process Node | 10 nm | 10 nm |

| L2 Cache | 2 MB (per core) | 1.25 MB (per core) |

| L3 Cache | 24 MB (shared) | 30 MB (shared) |

| Memory Bandwidth | Not specified | 76.8 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 5, 8 Lanes (CPU only) | Gen 5, 16 Lanes (CPU only) |

| Integrated Graphics | Iris Xe Graphics 96EU | UHD Graphics 770 |

| Market Segment | Mobile | Desktop |

| Release Date | 2024-12-17 | 2021-11-03 |

| Launch MSRP | $697 | $599 |

| Multiplier Unlocked | No | Yes |

| Part Number | SRQ6V | SRL4H |

| Die Size | Not specified | 215 mm² |

Head-to-Head Benchmarks

The 12900K dominates the Cinebench suite. In Cinebench R15 multi-core, it scores 3531 against the 270H's 2707, a 23.3% lead; the single-core test shows 498 vs 382, also 23.3%. R20 and R23 follow the same pattern: R20 multi-core 14713 vs 11281, single-core 2076 vs 1592; R23 multi-core 35031 vs 26861, single-core 4945 vs 3792. Every Cinebench result favors the 12900K by exactly 23.3%.

Passmark results are similarly one-sided. Data compression: 537341 vs 364399 (32.2% advantage). Data encryption: 29579 vs 21223 (28.2%). Extended instructions: 33682 vs 21785 (35.3%). Find prime numbers: 147 vs 115 (21.8%). Floating point math: 105471 vs 80299 (23.9%). Integer math: 139090 vs 110195 (20.8%). Multithread: 41213 vs 31602 (23.3%). Physics: 2219 vs 1946 (12.3%). Random string sorting: 57094 vs 40885 (28.4%). The 12900K's smallest win is in physics at 12.3%, and its largest is in extended instructions at 35.3%.

The only bright spot for the Core 9 270H is Passmark's single-thread test, where it posts 4404 against the 12900K's 4136, a 6.5% margin. This result appears twice in the head-to-head data, giving the 270H two wins out of 17 comparisons. Even in that test, the absolute difference is modest — 268 points — but it does indicate that the mobile chip's high boost clock of 5.80 GHz can outpace the desktop part in a lightly threaded workload.

Given the near-identical average scores (42816 vs 42781, deltaPct 0.1%), one might expect a close contest. The head-to-head data, however, shows a decisive victory for the 12900K in every multi-threaded and most single-threaded scenarios. The 270H's single-thread Passmark win is notable but does not offset the 12900K's broad superiority across the benchmark suite. For desktop users, the 12900K is the definitive performer; for laptop users, the 270H offers a compelling mobile alternative with a higher boost clock and a much lower TDP.