AMD Ryzen 9 9900X vs Intel Core Ultra 9 285 Comparison

Head-to-Head Benchmarks

The recorded data separates these two processors clearly across the tested workloads. The Intel Core Ultra 9 285 wins 11 of the 15 head-to-head comparisons, but the AMD Ryzen 9 9900X takes four decisive victories that reveal distinct strengths. The average benchmark score tells the first part of the story: the Intel part scores 75488 against 57498 for the AMD part, a gap of roughly 31%.

The most dramatic single result is in Cinebench R23 single-core. Intel posts 6909 against AMD's 2253, a 67.4% advantage. That is the largest delta in the entire comparison. Cinebench R15 single-core repeats the pattern, with Intel at 696 versus 353, a 49.3% lead. These are not marginal differences; they indicate a substantial per-thread performance advantage for the Arrow Lake architecture in this specific rendering workload.

Multi-core rendering tells a different but still Intel-favoring story. In Cinebench R23 multicore, Intel scores 48945 against 32172, a 34.3% lead. The R15 multicore test is the only rendering result where AMD wins, scoring 5008 against 4933, a slim 1.5% margin. That single victory does not offset the broader trend, but it does show the Ryzen 9 9900X is competitive in at least one legacy rendering scenario.

The PassMark suite splits the workloads almost evenly by category, though Intel still takes more tests overall. AMD wins data compression by 13.5% (683579 vs 602121), extended instructions by 21.8% (55243 vs 45357), and integer math by 9.8% (181056 vs 164869). Intel wins data encryption by 28.8% (46949 vs 33421), floating point math by 38.4% (194988 vs 120083), find prime numbers by 5% (459 vs 436), and multithread by 3.5% (56602 vs 54643). The physics test goes to Intel by 6% (3598 vs 3381), random string sorting goes to Intel by 2.2% (73651 vs 72013), and both single-thread PassMark entries go to Intel by 4.3% (4881 vs 4672).

The pattern is consistent: Intel dominates in floating-point-heavy and single-threaded workloads, while AMD takes integer-heavy and compression-oriented tasks. The multithread PassMark score is close, with Intel ahead by only 3.5%, which suggests that in some mixed parallel workloads the two are nearly equivalent despite the large Cinebench multicore gap.

Architecture Differences

The two chips come from fundamentally different design philosophies. The AMD Ryzen 9 9900X uses the Zen 5 architecture on the Granite Ridge codename, built on a 4 nm process at TSMC. It packs 12 cores and 24 threads, with a base clock of 4.40 GHz and a boost clock of 5.60 GHz. The Intel Core Ultra 9 285 uses the Arrow Lake architecture on the Arrow Lake-S codename, built on a 3 nm process, also at TSMC. It has 24 cores and 24 threads, with a base clock of 2.50 GHz and a boost clock of 5.60 GHz.

The core count difference is central to understanding the results. Intel has twice the physical cores, but because it lacks simultaneous multithreading, both chips expose 24 threads. AMD relies on its 12 cores with 2 threads per core to reach 24 threads; Intel uses 24 discrete cores, each with a single thread. This explains why Intel wins most multithreaded tests despite having a much lower base clock: more physical cores can sustain parallel throughput without sharing execution resources.

Cache organization also differs sharply. AMD provides 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of L3 cache. Intel provides 192 KB of L1 per core, 3 MB of L2 per core, and 36 MB of shared L3. Intel's per-core cache is larger, which helps single-thread performance, while AMD's larger L3 pool benefits workloads that share data across cores.

Transistor counts and die size reveal the physical scaling differences. AMD uses 16,630 million transistors across a dual-die design with 2x 70.6 mm² dies. Intel uses 17,800 million transistors on a single 243 mm² die. The process nodes differ by one step: 4 nm for AMD, 3 nm for Intel.

Memory bandwidth favors Intel at 102.4 GB/s versus 89.6 GB/s for AMD, though both support DDR5 on dual-channel buses. Both support ECC memory. PCIe lanes differ: AMD offers Gen 5 with 24 lanes, Intel offers Gen 5 with 20 lanes. Integrated graphics also differ: AMD includes Radeon Graphics, Intel includes Arc Xe-LPG Graphics with 64 execution units.

The power envelope is a major differentiator. AMD has a 120 W TDP, while Intel has a 65 W TDP. The Intel part delivers higher performance in most benchmarks while drawing a lower rated power, which is a notable efficiency result in the recorded data. Intel also has a locked multiplier, while AMD has an unlocked multiplier, allowing overclocking on the AMD side.

FAQ

Q: Which processor has the higher single-core Cinebench R23 score?

A: The Intel Core Ultra 9 285 scores 6909 in Cinebench R23 single-core, while the AMD Ryzen 9 9900X scores 2253. That gives Intel a 67.4% lead in this test.

Q: Does the AMD Ryzen 9 9900X win any benchmark comparisons?

A: Yes. The AMD part wins four head-to-head tests: Cinebench R15 multicore (1.5% ahead), PassMark data compression (13.5% ahead), PassMark extended instructions (21.8% ahead), and PassMark integer math (9.8% ahead).

Q: How do the core counts compare?

A: The AMD Ryzen 9 9900X has 12 cores and 24 threads. The Intel Core Ultra 9 285 has 24 cores and 24 threads. Both expose 24 threads, but Intel uses 24 physical cores without multithreading while AMD uses 12 cores with two threads per core.

Q: What is the average benchmark score for each processor?

A: The AMD Ryzen 9 9900X has an average benchmark score of 57498, placing it at the 92nd percentile among all CPUs. The Intel Core Ultra 9 285 has an average benchmark score of 75488, placing it at the 95th percentile.

Q: Which processor supports ECC memory?

A: Both processors support ECC memory. Both also support DDR5 on dual-channel memory buses.

Q: What are the boost clocks for each processor?

A: Both processors have a boost clock of 5.60 GHz. The base clocks differ: AMD runs at 4.40 GHz while Intel runs at 2.50 GHz.

Specification Differences

| Specification | AMD Ryzen 9 9900X | Intel Core Ultra 9 285 |

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

| Cores | 12 | 24 |

| Threads | 24 | 24 |

| Base clock | 4.40 GHz | 2.50 GHz |

| Boost clock | 5.60 GHz | 5.60 GHz |

| TDP | 120 W | 65 W |

| Socket | AMD Socket AM5 | Intel Socket 1851 |

| Architecture | Zen 5 | Arrow Lake |

| Codename | Granite Ridge | Arrow Lake-S |

| Process node | 4 nm | 3 nm |

| Transistors | 16,630 million | 17,800 million |

| Die size | 2x 70.6 mm² | 243 mm² |

| L1 cache | 80 KB (per core) | 192 KB (per core) |

| L2 cache | 1 MB (per core) | 3 MB (per core) |

| L3 cache | 64 MB | 36 MB (shared) |

| Memory bandwidth | 89.6 GB/s | 102.4 GB/s |

| PCIe lanes | Gen 5, 24 lanes | Gen 5, 20 lanes |

| Integrated graphics | Radeon Graphics | Arc Xe-LPG Graphics 64EU |

| Multiplier | Unlocked | Locked |

| Launch MSRP | $499 | $579 |

| Release date | 2024-08-14 | 2024-12-31 |

Where Each One Wins

The Intel Core Ultra 9 285 wins the majority of benchmark comparisons, but the wins are concentrated in specific workload families. It dominates single-threaded rendering with a 67.4% lead in Cinebench R23 single-core and a 49.3% lead in Cinebench R15 single-core. It also takes floating-point math by 38.4%, data encryption by 28.8%, and prime number finding by 5%. The multithread PassMark score goes to Intel by 3.5%, and the physics test goes to Intel by 6%. The 24 physical cores provide a clear advantage in parallel floating-point and encryption tasks, and the larger per-core cache helps in single-threaded scenarios.

The AMD Ryzen 9 9900X wins in four specific areas: data compression by 13.5%, extended instructions by 21.8%, integer math by 9.8%, and Cinebench R15 multicore by 1.5%. These wins cluster around integer-heavy and instruction-dense workloads. The 64 MB L3 cache likely helps in compression and extended instruction processing, where shared data access patterns benefit from a large pooled cache. The benchmark data shows that AMD's Zen 5 architecture retains a meaningful edge in integer throughput and certain specialized instruction workloads.

The overall score distribution is telling. Intel takes 11 wins, AMD takes 4. The magnitude of Intel's wins in single-core and floating-point tests is far larger than the magnitude of AMD's wins in integer and compression tests. The largest AMD win is 21.8% in extended instructions, while Intel has three wins above 28% and one above 49%.

The Verdict

The benchmark data indicates that the Intel Core Ultra 9 285 is the stronger overall performer across the recorded test suite. It holds a 95th percentile ranking among all CPUs, compared to the 92nd percentile for the AMD Ryzen 9 9900X. Its average benchmark score of 75488 exceeds the AMD part's 57498 by a substantial margin. The Intel chip also achieves this with a lower TDP of 65 W versus 120 W for AMD, and a higher launch MSRP of $579 versus $499.

The specific use cases favor Intel for single-threaded rendering, floating-point computation, encryption, and general multithreaded workloads. The Cinebench results show Intel is particularly strong in rendering tasks that rely on per-thread efficiency. The PassMark physics and multithread results confirm that Intel's 24 physical cores handle parallel workloads well.

The AMD Ryzen 9 9900X is the better choice for workloads that depend on integer math, data compression, and extended instruction sets. Its wins in those categories are not trivial, and its 1.5% margin in Cinebench R15 multicore shows it can still compete in some rendering scenarios. The unlocked multiplier is another point in its favor for users who plan to overclock, and the lower launch MSRP of $499 makes it the less expensive option at introduction.

For users prioritizing raw single-thread performance, floating-point throughput, and the highest overall benchmark scores, the Intel Core Ultra 9 285 is the clear pick from the data. For users focused on integer-heavy workloads, compression, and extended instruction processing, the AMD Ryzen 9 9900X delivers competitive results in those specific areas. The data does not support a broad recommendation for AMD outside those niches, given Intel's 11-to-4 win count and larger average margin of victory.