Intel Core i9-12900HX vs Intel Xeon 6349P Comparison

The Intel Core i9-12900HX and Intel Xeon 6349P occupy different corners of the Intel lineup, yet their benchmark averages land within 0.3% of each other. The Core i9-12900HX posts an average benchmark score of 35003, while the Xeon 6349P trails slightly at 34890. Both sit at the 84th percentile among all CPUs, making them statistical peers in overall performance. The data reveals a clear division of labor: the mobile Alder Lake chip dominates multi-threaded workloads, while the desktop Raptor Lake Xeon takes single-thread honors by a wide margin.

Head-to-Head Benchmarks

The Core i9-12900HX wins 13 of the 17 direct comparisons, and its victories are frequently decisive. In Cinebench R15 multicore, the gap is enormous: the i9 scores 3566 against the Xeon's 2209, a 61.4% advantage. That pattern repeats across most multi-threaded tests. PassMark integer math shows 113416 versus 82443, a 37.6% lead. Floating-point math follows with 84410 versus 61796, a 36.6% edge. Data encryption is even more lopsided at 41.2% (22932 vs 16239), and random string sorting shows a 41.3% margin (43877 vs 31056). Physics simulation favors the i9 by 42.9% (2012 vs 1408). Prime number finding yields a 46.7% gap (132 vs 90).

The Cinebench R20 results split oddly. The i9 wins multicore with 11764 versus 9208, a 27.8% margin, and also wins single-core with 1660 versus 1299 — another 27.8% edge. That single-core R20 result contradicts the other single-thread tests. Cinebench R23 multicore is closer, with the i9 at 23150 and the Xeon at 21924, a modest 5.6% lead. PassMark multithread gives the i9 a 28.6% win (33158 vs 25793), and extended instructions show a 19% advantage (24315 vs 20426). Data compression favors the i9 by 30.6% (400636 vs 306774).

The Xeon 6349P wins four tests, all single-thread oriented. PassMark single-thread and singlethread (identical scores of 4528 vs 3745) give it a 17.3% edge. Cinebench R23 single-core is its best result: 3095 versus 1912.5, a 38.2% advantage. Cinebench R15 single-core is narrower, with the Xeon at 311 versus 278, a 10.6% win. These single-thread wins are substantial, but they cannot offset the i9's dominance across the broader workload suite.

Architecture Differences

The two chips come from different architectural lineages despite sharing the same 10 nm process node and Intel foundry. The Core i9-12900HX is built on Alder Lake-HX, part of the Core 12th Gen series, while the Xeon 6349P uses Raptor Lake-R, a Raptor Lake refresh. The i9 packs 16 cores and 24 threads; the Xeon has only 6 cores and 12 threads. Clock speeds tell the opposite story. The Xeon runs at a 3.60 GHz base and 5.70 GHz boost, versus the i9's 2.30 GHz base and 5.00 GHz boost. The Xeon's higher clocks explain its single-thread wins, while the i9's core count drives its multi-threaded superiority.

Cache configurations differ in capacity but not per-core layout. Both use 80 KB of L1 per core and 1.25 MB of L2 per core. The i9's shared L3 is 30 MB, compared to the Xeon's 18 MB. Die size favors the Xeon at 163 mm², while the i9 is larger at 215 mm², reflecting the extra cores and integrated graphics. The i9 includes UHD Graphics 770; the Xeon has no integrated graphics. Both support DDR4 and DDR5 memory over dual-channel buses and both support ECC memory, which is notable for the mobile chip. PCIe connectivity differs: the i9 offers Gen 5 with 20 CPU lanes, the Xeon Gen 5 with 16 CPU lanes.

The sockets are incompatible. The i9 uses Intel BGA 1964, a soldered mobile package, while the Xeon uses Intel Socket 1700 for desktop/workstation boards. The i9 has an unlocked multiplier; the Xeon does not. TDP ratings reflect their intended environments: the i9 draws 55 watts, the Xeon 95 watts. The i9 launched in May 2022 with a launch MSRP of $606; the Xeon arrived in February 2025 at a launch MSRP of $509. Production status is active for both.

Where Each One Wins

The Core i9-12900HX is the clear choice for multi-threaded throughput. Its 16 cores and 24 threads crush the Xeon in every multithreaded benchmark, from Cinebench R15's 61.4% margin to the more moderate 5.6% lead in Cinebench R23 multicore. PassMark multithread, integer math, floating-point math, encryption, compression, and physics all favor the i9 by double-digit percentages. Workloads that scale with core count — rendering, video encoding, data compression, scientific computation — will see substantial benefits from the i9.

The Xeon 6349P wins exclusively on single-thread performance. Its 5.70 GHz boost clock delivers a 38.2% lead in Cinebench R23 single-core and a 17.3% lead in PassMark single-thread. For lightly threaded applications, legacy software, or tasks that depend on raw clock speed rather than parallel scaling, the Xeon is the faster part. The Xeon also benefits from a lower launch MSRP ($509 versus $606) and a smaller die, though pricing is not a performance metric.

The Cinebench R20 single-core result is an outlier, with the i9 winning by 27.8% despite losing other single-thread tests. This suggests workload-specific behavior where the i9's Alder Lake architecture handles R20's single-threaded path better than R15 or R23. It does not change the overall pattern: the Xeon dominates pure single-thread workloads, while the i9 dominates everything else.

FAQ

Q: Which CPU has a higher average benchmark score?

A: The Intel Core i9-12900HX averages 35003, which is 0.3% higher than the Xeon 6349P's 34890. Both rank at the 84th percentile among all CPUs.

Q: How large is the multi-threaded performance gap?

A: The i9-12900HX wins Cinebench R15 multicore by 61.4% (3566 vs 2209) and PassMark multithread by 28.6% (33158 vs 25793). Cinebench R23 multicore is closest at 5.6% (23150 vs 21924).

Q: Where does the Xeon 6349P beat the i9-12900HX?

A: The Xeon wins four tests, all single-thread: Cinebench R23 single-core by 38.2% (3095 vs 1912.5), PassMark single-thread by 17.3% (4528 vs 3745), and Cinebench R15 single-core by 10.6% (311 vs 278).

Q: Do both CPUs support ECC memory?

A: Yes, both the i9-12900HX and Xeon 6349P support ECC memory, and both support DDR4 and DDR5 over dual-channel buses.

Q: What are the core and thread counts?

A: The i9-12900HX has 16 cores and 24 threads. The Xeon 6349P has 6 cores and 12 threads.

Q: Which socket does each processor use?

A: The i9-12900HX uses Intel BGA 1964, a mobile socket. The Xeon 6349P uses Intel Socket 1700, a desktop/server socket. They are not interchangeable.

The Verdict

The data points to a straightforward decision based on workload type. For multi-threaded applications, the Core i9-12900HX is the superior processor. It wins 13 of 17 head-to-head tests, with margins ranging from 5.6% to 61.4%. Its 16 cores and 24 threads provide a massive scaling advantage that the Xeon's 6 cores cannot match, despite the Xeon's higher clock speeds. Anyone running renderers, compilers, data compression, or parallel scientific code should favor the i9.

The Xeon 6349P is the pick for single-threaded performance. Its 38.2% lead in Cinebench R23 single-core is the largest single-test margin in either direction. Applications that rely on one or two threads — legacy databases, certain scripting workloads, or interactive single-threaded tools — will run noticeably faster on the Xeon. Its 95-watt TDP and server/workstation market segment also suggest a platform designed for sustained operation, though the benchmark data does not measure reliability or power efficiency.

The i9's integrated UHD Graphics 770 is an additional functional advantage, eliminating the need for a discrete GPU in basic display scenarios. The Xeon has no integrated graphics. The i9 also offers more PCIe lanes (20 versus 16) and a larger L3 cache (30 MB versus 18 MB). The Xeon counters with a higher base clock (3.60 GHz vs 2.30 GHz), a higher boost clock (5.70 GHz vs 5.00 GHz), and a smaller die. Both CPUs sit at the same 84th percentile and have near-identical average scores, so the choice hinges entirely on whether the workload is parallel or single-threaded.

Specification Differences

| Specification | Intel Core i9-12900HX | Intel Xeon 6349P |

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

| Cores | 16 | 6 |

| Threads | 24 | 12 |

| Base Clock | 2.30 GHz | 3.60 GHz |

| Boost Clock | 5.00 GHz | 5.70 GHz |

| TDP | 55 W | 95 W |

| Socket | Intel BGA 1964 | Intel Socket 1700 |

| Architecture | Alder Lake | Raptor Lake |

| Codename | Alder Lake-HX | Raptor Lake-R |

| Generation | Core i9 (Alder Lake-HX) | Xeon 6 (Raptor Lake Refresh) |

| Process Node | 10 nm | 10 nm |

| Die Size | 215 mm² | 163 mm² |

| L3 Cache | 30 MB (shared) | 18 MB (shared) |

| PCIe | Gen 5, 20 Lanes (CPU only) | Gen 5, 16 Lanes (CPU only) |

| Integrated Graphics | UHD Graphics 770 | N/A |

| Market Segment | Mobile | Server/Workstation |

| Release Date | 2022-05-09 | 2025-02-23 |

| Launch MSRP | $606 | $509 |

| Multiplier Unlocked | Yes | No |

| Part Number | SRLGK | SRPLT |