Intel Core i9-12900 vs Intel Core Ultra 7 366H Comparison

The Intel Core i9-12900 and Intel Core Ultra 7 366H represent two distinct philosophies in processor design, with the desktop Alder Lake chip leveraging high thread counts and the mobile Panther Lake part focusing on efficiency and modern IPC. The benchmark data reveals a clear split: the i9-12900 dominates in legacy multi-core workloads and specific math tasks, while the Ultra 7 366H delivers a decisive victory in modern rendering, single-core performance, and compute-heavy operations. With the i9-12900 winning 7 benchmarks and the Ultra 7 366H winning 10, the choice between them depends entirely on workload priorities.

Where Each One Wins

The Intel Core i9-12900 is the champion of integer-heavy and legacy multi-threaded tasks. Its most dominant result comes in PassMark integer math, where it scores 127512 against 83695 for the Ultra 7 366H, a 52.4% advantage. This is a massive gap that indicates superior performance in applications relying on traditional integer arithmetic. Similarly, the i9-12900 leads in data compression with a score of 407899 versus 327455, a 24.6% edge, making it the better choice for file archiving, compression tools, and workloads that process large volumes of data sequentially. The desktop chip also wins random string sorting by 10.7%, scoring 44070 against 39814, and edges out the mobile part in Cinebench R20 multicore with 11994 versus 11960, a narrow 0.3% margin that reflects its 24 threads versus 16 threads.

The Intel Core Ultra 7 366H, on the other hand, wins decisively in single-core and modern rendering workloads. Its Cinebench R23 single-core score of 4020 crushes the i9-12900's 1825, a 54.6% advantage that highlights the generational IPC leap in the Panther Lake architecture. The Ultra 7 also wins Cinebench R23 multicore with 28477 versus 18628, a 34.6% lead, despite having fewer threads. This is a remarkable result that shows how much more efficient each core is on the newer process node. In Cinebench R15 single-core, the Ultra 7 scores 405 against 262, a 35.3% win, and in PassMark physics it scores 2880 versus 1730, a 39.9% advantage. The mobile chip also leads in floating point math with 103615 against 91514, an 11.7% margin, and in find prime numbers with 326 versus 121, a 62.9% blowout.

Data encryption goes to the Ultra 7 366H with 25845 versus 23203, a 10.2% win, and extended instructions also favor the mobile part with 26901 versus 24777, a 7.9% edge. The single-thread PassMark scores are nearly tied, with the Ultra 7 at 4043 versus 4003, a 1% lead that confirms its slight per-core advantage in general single-threaded throughput.

The Verdict

Choose the Intel Core i9-12900 if your workload is dominated by integer math, data compression, or random string sorting. Its 52.4% lead in integer math and 24.6% lead in compression make it the clear choice for developers compiling code, analysts processing large datasets, and users running legacy multi-threaded applications that scale well with its 24 threads. The i9-12900 also holds a narrow edge in Cinebench R20 multicore, so older rendering tasks that use that benchmark will see a marginal benefit. This is a desktop processor with a 65W TDP, and its 16 cores with 24 threads provide the raw parallelism that older software can exploit.

Pick the Intel Core Ultra 7 366H if you prioritize modern rendering, single-core responsiveness, or efficiency. Its Cinebench R23 multicore score is 34.6% higher, and its single-core R23 score is 54.6% higher, which translates to snappier application launches and better performance in lightly threaded tasks. The 25W TDP makes it suitable for mobile systems, and the same 16-core count with 16 threads delivers better per-core performance thanks to the 3nm process and Panther Lake architecture. For physics simulations, floating point math, and encryption, the Ultra 7 is also the better performer. The data shows that for any workload built on newer instruction sets or optimized for high IPC, the Ultra 7 366H is the superior part.

Head-to-Head Benchmarks

The most one-sided result in the comparison is PassMark integer math, where the i9-12900 scores 127512 and the Ultra 7 366H scores 83695, giving the desktop chip a 52.4% advantage. This is the largest delta in either direction and indicates a fundamental difference in how the two architectures handle integer operations.

The reverse is true in find prime numbers, where the Ultra 7 366H scores 326 against 121, a 62.9% lead for the mobile chip. This workload is highly sensitive to per-core efficiency and memory latency, and the Panther Lake design clearly excels here.

Cinebench R23 provides the most telling overall picture. The Ultra 7 366H scores 28477 in multicore, which is 34.6% higher than the i9-12900's 18628. In single-core, the margin is even larger at 54.6%, with scores of 4020 and 1825 respectively. These results show that the Ultra 7 366H is not just more efficient, it is substantially faster in current-generation rendering workloads.

In Cinebench R15, the split is interesting. The i9-12900 wins multicore with 3299 versus 2870, a 14.9% margin, but the Ultra 7 366H wins single-core with 405 versus 262, a 35.3% edge. This suggests that older multi-threaded benchmarks that do not scale with per-core efficiency still favor the i9-12900's higher thread count.

PassMark multithread is nearly a tie, with the i9-12900 scoring 33608 and the Ultra 7 366H scoring 33429, a 0.5% difference. Single-thread PassMark also favors the Ultra 7 by only 1%, at 4043 versus 4003. These close results indicate that in generic mixed workloads, the two processors are broadly comparable, with the differences emerging only in specific task types.

FAQ

Q: Which processor is faster in Cinebench R23 multicore?

A: The Intel Core Ultra 7 366H scores 28477, which is 34.6% higher than the Intel Core i9-12900's 18628.

Q: How do the two chips compare in integer math performance?

A: The Intel Core i9-12900 leads significantly, scoring 127512 versus 83695 for the Ultra 7 366H, a 52.4% advantage.

Q: Is the Ultra 7 366H better for single-core tasks?

A: Yes, the Ultra 7 366H wins Cinebench R23 single-core with 4020 against 1825, a 54.6% lead, and Cinebench R15 single-core with 405 against 262, a 35.3% edge.

Q: What is the thread count difference between these processors?

A: The Intel Core i9-12900 has 24 threads, while the Intel Core Ultra 7 366H has 16 threads, both with 16 cores.

Q: Which chip has a higher memory bandwidth?

A: The Intel Core Ultra 7 366H has a memory bandwidth of 115.2 GB/s, while the Intel Core i9-12900 has 76.8 GB/s.

Q: How close are the PassMark multithread scores?

A: They are nearly identical, with the i9-12900 scoring 33608 and the Ultra 7 366H scoring 33429, a difference of only 0.5%.

Architecture Differences

The two processors come from different eras and process nodes. The Intel Core i9-12900 uses the Alder Lake architecture on Intel's 10nm process, while the Intel Core Ultra 7 366H uses the newer Panther Lake architecture on a 3nm node. This process difference explains much of the performance gap, as the Ultra 7 366H achieves higher scores in most modern workloads despite a lower boost clock of 4.80 GHz versus 5.10 GHz for the i9-12900.

Cache configurations differ substantially. The i9-12900 has 80 KB of L1 cache per core and 1.25 MB of L2 cache per core, with 30 MB of shared L3 cache. The Ultra 7 366H has larger per-core caches at 192 KB of L1 and 2.5 MB of L2, but a smaller 18 MB shared L3 cache. The larger per-core caches on the Ultra 7 contribute to its superior single-core performance, while the i9-12900's larger L3 cache helps in multi-threaded workloads that share data.

Memory support also differs. The i9-12900 supports DDR4 and DDR5 memory with dual-channel access and a bandwidth of 76.8 GB/s. The Ultra 7 366H supports DDR5 and LPDDR5X with dual-channel access and a higher bandwidth of 115.2 GB/s. The Ultra 7 also has a lower TDP of 25W compared to 65W for the i9-12900, reflecting its mobile-focused design.

The i9-12900 uses Intel Socket 1700 with a desktop form factor, while the Ultra 7 366H uses Intel BGA 2540, indicating a soldered mobile configuration. The i9-12900 has an unlocked multiplier for overclocking, while the Ultra 7 366H is locked. PCIe support is similar in generation, with both offering Gen 5, but the i9-12900 provides 16 lanes compared to 12 lanes for the Ultra 7. Integrated graphics differ as well, with the i9-12900 featuring UHD Graphics 770 and the Ultra 7 366H featuring Intel Xe3 Graphics. The i9-12900 supports ECC memory, while the Ultra 7 366H does not. The i9-12900 was released in January 2022 with a launch MSRP of $519, while the Ultra 7 366H has a release date of January 2026 and no recorded launch MSRP.