AMD Ryzen AI Max PRO 385 vs Intel Core i9-12900KS Comparison

Head-to-Head Benchmarks

The database records a clean sweep for the Intel Core i9-12900KS across all seventeen head-to-head comparisons, with the AMD Ryzen AI Max PRO 385 failing to claim a single victory. The most commanding margins appear in Cinebench workloads, where the Intel part consistently leads by exactly 29.7% in every iteration from R15 through R23, regardless of core count. In Cinebench R23 multicore, the i9-12900KS scores 36,859 against the Ryzen's 28,424, while single-core results show 5,203 versus 4,012. This uniform delta across different Cinebench versions suggests the advantage is structural rather than workload-specific.

PassMark results tell a more varied story, with deltas ranging from a razor-thin 0.6% to a massive 65.5%. The largest gap appears in data encryption, where the Intel chip posts 31,403 versus the AMD's 18,978, a 65.5% advantage. Floating point math shows a 60.1% gap (111,429 to 69,580), followed by data compression at 48.6% (563,709 to 379,448) and random string sorting at 48.4% (60,539 to 40,784). Integer math trails at 40.5% (147,575 to 105,056), while physics simulation records 42.4% (2,437 to 1,711).

The closest contest by far is the find prime numbers test, where the Intel part edges ahead by just 0.6% (158 to 157), a margin small enough to be considered effectively equivalent. Extended instruction scores show an 11.6% gap (35,089 to 31,442), and single-thread performance in PassMark reveals an 8.4% advantage (4,330 to 3,995). The multithread PassMark aggregate lands at 36.2% (43,698 to 32,075).

Where Each One Wins

The Intel Core i9-12900KS wins everywhere in this direct comparison, but the size of each victory varies meaningfully by workload type. The most decisive wins come in encryption, floating point math, and Cinebench multicore, where the 16-core, 24-thread configuration can flex its full parallel capability. The 29.7% margin across all Cinebench tests, including single-core, indicates that both single-thread and multi-thread performance scale together in favor of Intel.

For the AMD Ryzen AI Max PRO 385, the data shows no benchmark category where it takes the lead. Its closest approach is in prime number finding (0.6% behind) and PassMark single-thread (8.4% behind), suggesting that in lightly threaded integer workloads, the gap narrows considerably. The extended instructions test shows a moderate 11.6% deficit, indicating that the Zen 5 architecture's instruction handling is relatively competitive even when the overall performance lags. However, these near-misses do not translate into any category victory.

The pattern suggests the AMD part is best suited for scenarios where its 55-watt power envelope and mobile form factor matter more than raw throughput. Its quad-channel LPDDR5X memory with 256.0 GB/s bandwidth is a substantial advantage over the Intel's dual-channel 76.8 GB/s, though the benchmark suite does not include memory-bandwidth-specific tests to quantify this. Users prioritizing memory throughput for integrated graphics or data-heavy mobile workflows might find the AMD more balanced, but the recorded CPU benchmarks consistently favor Intel.

Architecture Differences

The two processors represent fundamentally different design philosophies. Intel's Core i9-12900KS uses the Alder Lake architecture on a 10 nm process fabricated by Intel itself, with a 215 mm² die size. The AMD Ryzen AI Max PRO 385 employs Zen 5 architecture on a 4 nm process from TSMC, with no die size recorded in the database. The process node difference alone, 10 nm versus 4 nm, explains much of the efficiency gap: Intel's 150-watt TDP versus AMD's 55 watts.

Cache layouts differ significantly. Both have 80 KB L1 per core, but the L2 differs: Intel provides 1.25 MB per core while AMD provides 1 MB per core. Intel's L3 is 30 MB shared, while AMD's is 32 MB shared, a modest 2 MB advantage for AMD. Neither chip uses 3D V-Cache. The core topology diverges sharply, with Intel offering 16 cores and 24 threads against AMD's 8 cores and 16 threads. Intel relies on hybrid core design, a hallmark of Alder Lake, while AMD's Zen 5 in Strix Halo uses a more conventional uniform layout.

Memory architecture reflects their target markets. Intel supports both DDR4 and DDR5 in dual-channel configuration with 76.8 GB/s bandwidth. AMD exclusively uses LPDDR5X in quad-channel with 256.0 GB/s, a 3.3x bandwidth advantage that the database shows but does not directly benchmark. Both support ECC memory. PCIe generations differ: Intel offers Gen 5 with 16 lanes, AMD offers Gen 4 with 16 lanes. Integrated graphics also diverge, with Intel's UHD Graphics 770 against AMD's Radeon 8050S, though no GPU benchmarks are included in this comparison.

Specification Differences

| Field | Intel Core i9-12900KS | AMD Ryzen AI Max PRO 385 |

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

| Cores | 16 | 8 |

| Threads | 24 | 16 |

| Base Clock | 3.40 GHz | 3.60 GHz |

| Boost Clock | 5.50 GHz | 5.00 GHz |

| TDP | 150 W | 55 W |

| Socket | Intel Socket 1700 | AMD Socket FP11 |

| Process Node | 10 nm | 4 nm |

| Foundry | Intel | TSMC |

| L2 Cache | 1.25 MB (per core) | 1 MB (per core) |

| L3 Cache | 30 MB (shared) | 32 MB (shared) |

| Memory Support | DDR4, DDR5 | LPDDR5X |

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

| Memory Bandwidth | 76.8 GB/s | 256.0 GB/s |

| PCIe | Gen 5, 16 Lanes | Gen 4, 16 Lanes |

| Integrated Graphics | UHD Graphics 770 | Radeon 8050S |

| Market Segment | Desktop | Mobile |

| Release Date | 2022-04-04 | 2025-01-05 |

| Multiplier Unlocked | Yes | No |

The Intel part has a 0.20 GHz higher boost clock, while AMD has a 0.20 GHz higher base clock. Intel's L2 is 25% larger per core, but AMD's L3 is 6.7% larger overall. The production status for both is listed as Active. Intel's launch MSRP is $739; AMD's launch MSRP is not recorded in the database. The mobile AMD part is socketed as FP11, while the desktop Intel part uses Socket 1700.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core i9-12900KS has an average benchmark score of 45,094, placing it in the 89th percentile of all CPUs. The AMD Ryzen AI Max PRO 385 averages 43,326, sitting in the 88th percentile.

Q: How large is the Cinebench R23 multicore gap?

A: The Intel part scores 36,859 against AMD's 28,424, a 29.7% advantage.

Q: Which chip offers more memory bandwidth?

A: The AMD Ryzen AI Max PRO 385 provides 256.0 GB/s over quad-channel LPDDR5X, versus Intel's 76.8 GB/s over dual-channel DDR4/DDR5.

Q: Are there any benchmarks where the AMD chip comes close to winning?

A: The closest result is passmark find prime numbers, where Intel leads by just 0.6% (158 versus 157). The next closest is PassMark single-thread at 8.4% (4,330 versus 3,995).

Q: What are the core and thread counts for each?

A: The Intel Core i9-12900KS has 16 cores and 24 threads. The AMD Ryzen AI Max PRO 385 has 8 cores and 16 threads.

Q: Which chip has a higher boost clock?

A: The Intel Core i9-12900KS boosts to 5.50 GHz, while the AMD Ryzen AI Max PRO 385 boosts to 5.00 GHz.

The Verdict

The benchmark data is unambiguous: the Intel Core i9-12900KS outperforms the AMD Ryzen AI Max PRO 385 in every recorded test. For users seeking maximum CPU throughput in desktop workloads, particularly Cinebench rendering, encryption, or floating point math, the Intel chip delivers margins between 29.7% and 65.5% depending on the task. Its 16-core, 24-thread configuration and 5.50 GHz boost clock provide a substantial parallel and single-thread advantage.

The AMD Ryzen AI Max PRO 385 is not without rationale, however. Its 55-watt TDP versus Intel's 150 watts makes it suitable for mobile or power-constrained environments, and its 256.0 GB/s memory bandwidth with quad-channel LPDDR5X dwarfs Intel's 76.8 GB/s, which may benefit integrated graphics workloads or memory-intensive applications not captured in this CPU benchmark suite. The 4 nm TSMC process versus Intel's 10 nm node also signals superior efficiency per watt, even if the raw scores do not reflect it.

The data shows the Intel part is the clear choice for pure processing performance. The AMD part makes sense only when its mobile form factor, lower power draw, or memory bandwidth advantages outweigh the significant compute deficit. For desktop users, the i9-12900KS's 89th percentile standing and its sweep of all head-to-head tests make it the straightforward recommendation. For mobile users, the Ryzen AI Max PRO 385's 88th percentile and its efficiency profile offer a different trade-off, but one that the recorded benchmarks cannot validate as a performance winner.