AMD Ryzen 9 9900X3D vs AMD Ryzen AI 7 PRO 450 Comparison

FAQ

Q: Which processor has the higher overall average benchmark score?

A: The AMD Ryzen 9 9900X3D records an average benchmark score of 54,762, while the AMD Ryzen AI 7 PRO 450 records 37,093. The 9900X3D also holds a higher percentile ranking at 91 versus 85 for the AI 7 PRO 450.

Q: How do the two processors compare in single-threaded Cinebench R23 performance?

A: The Ryzen 9 9900X3D scores 6,739 in Cinebench R23 single-core, which is 235.3% higher than the Ryzen AI 7 PRO 450's score of 2,010. The delta is the largest single-core margin recorded in the head-to-head data.

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

A: The Ryzen 9 9900X3D has 12 cores and 24 threads. The Ryzen AI 7 PRO 450 has 8 cores and 16 threads.

Q: Which processor supports PCIe Gen 5?

A: The Ryzen 9 9900X3D supports PCIe Gen 5 with 24 lanes (CPU only). The Ryzen AI 7 PRO 450 supports PCIe Gen 4 with 16 lanes (CPU only).

Q: What is the TDP difference between the two chips?

A: The Ryzen 9 9900X3D has a TDP of 120 watts, while the Ryzen AI 7 PRO 450 has a TDP of 28 watts. The AI 7 PRO 450 is a mobile processor, whereas the 9900X3D is a desktop part.

Q: Which processor has more L3 cache?

A: The Ryzen 9 9900X3D has 128 MB of L3 cache. The Ryzen AI 7 PRO 450 has 8 MB of L3 cache.

Architecture Differences

The two processors share the Zen 5 architecture and are both built on TSMC's 4 nm process node. Both use 80 KB of L1 cache per core and 1 MB of L2 cache per core, and both support ECC memory with dual-channel memory buses delivering 89.6 GB/s of bandwidth. The similarities end there.

The Ryzen 9 9900X3D is a desktop part with the codename Granite Ridge. It uses a chiplet design with a die size of 2x 70.6 mm² and contains 16,630 million transistors. The Ryzen AI 7 PRO 450 carries the codename Gorgon Point and is a mobile processor with a monolithic 195 mm² die. The transistor count for the AI 7 PRO 450 is not recorded in the database.

The 9900X3D pairs 12 cores with 24 threads and a 128 MB L3 cache, which is the defining feature of the X3D lineup. The AI 7 PRO 450 uses 8 cores and 16 threads with just 8 MB of L3 cache. Clock speeds differ substantially: the 9900X3D has a base clock of 4.40 GHz and a boost clock of 5.50 GHz, while the AI 7 PRO 450 has a base clock of 2.00 GHz and a boost clock of 5.10 GHz.

Socket and platform support diverge. The 9900X3D uses AMD Socket AM5, supports PCIe Gen 5 with 24 CPU lanes, and includes Radeon Graphics as integrated graphics. The AI 7 PRO 450 uses AMD Socket FP8, supports PCIe Gen 4 with 16 CPU lanes, and integrates Radeon 860M graphics. The 9900X3D has an unlocked multiplier, while the AI 7 PRO 450 does not.

Memory support also differs. The 9900X3D supports DDR5 only. The AI 7 PRO 450 supports both DDR5 and LPDDR5X. The integrated graphics solution is more capable on the mobile chip (Radeon 860M compared to the base Radeon Graphics on the desktop part), reflecting the AI 7 PRO 450's intended use in systems without discrete GPUs.

Where Each One Wins

The benchmark data records 15 wins for the Ryzen 9 9900X3D and zero wins for the Ryzen AI 7 PRO 450. The 9900X3D dominates every recorded test, but the margin varies considerably by workload.

The 9900X3D shows its largest advantages in heavy multi-threaded and compute-intensive tasks. The Cinebench R23 multicore test shows a 197.4% delta, and PassMark physics shows a 299.4% delta. The PassMark prime number test shows a 547.6% delta, the largest single margin in the dataset. These results indicate the 9900X3D is designed for sustained all-core workloads such as rendering, scientific computation, and content creation.

The Ryzen AI 7 PRO 450's closest performance comes in single-threaded PassMark tests. The 9900X3D scores 4,646 versus 3,955 for the AI 7 PRO 450, a delta of 17.5%. This smaller gap suggests the mobile chip's Zen 5 cores are competitive on a per-thread basis at lower power, even though the desktop part still leads. The AI 7 PRO 450's 28 W TDP positions it for battery-conscious mobile systems where the 9900X3D's 120 W TDP is not feasible.

The data does not show any workload category where the AI 7 PRO 450 outperforms the 9900X3D. The mobile chip's advantages come from platform characteristics, not raw benchmark scores: lower TDP, LPDDR5X memory support, and integrated Radeon 860M graphics for compact systems.

Specification Differences

| Specification | AMD Ryzen 9 9900X3D | AMD Ryzen AI 7 PRO 450 |

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

| Cores | 12 | 8 |

| Threads | 24 | 16 |

| Base clock | 4.40 GHz | 2.00 GHz |

| Boost clock | 5.50 GHz | 5.10 GHz |

| TDP | 120 W | 28 W |

| Socket | AMD Socket AM5 | AMD Socket FP8 |

| Codename | Granite Ridge | Gorgon Point |

| Die size | 2x 70.6 mm² | 195 mm² |

| L3 cache | 128 MB | 8 MB |

| Memory support | DDR5 | DDR5, LPDDR5X |

| PCIe | Gen 5, 24 Lanes (CPU only) | Gen 4, 16 Lanes (CPU only) |

| Integrated graphics | Radeon Graphics | Radeon 860M |

| Market segment | Desktop | Mobile |

| Launch MSRP | $599 | Not available |

| Multiplier unlocked | Yes | No |

| Part number | 100-000001368 | 100-000001865 |

Both processors share the Zen 5 architecture, 4 nm TSMC process, 80 KB L1 per core, 1 MB L2 per core, dual-channel memory bus, 89.6 GB/s memory bandwidth, and ECC memory support.

Head-to-Head Benchmarks

The Ryzen 9 9900X3D wins every benchmark in the head-to-head comparison. The largest margins appear in compute-heavy tests.

The Cinebench R23 single-core test shows the 9900X3D scoring 6,739 against 2,010 for the AI 7 PRO 450, a delta of 235.3%. This is the second-largest margin in the entire dataset. The single-core result compounds with the multicore result: the 9900X3D scores 47,737 in Cinebench R23 multicore versus 16,054, a delta of 197.4%. The 12-core, 24-thread configuration with a 5.50 GHz boost clock clearly drives this separation.

PassMark physics delivers a 299.4% delta, with the 9900X3D scoring 5,340 against 1,337. The prime number test shows the most extreme gap: 544 versus 84, a 547.6% delta. This test is sensitive to integer throughput and cache behavior, and the 9900X3D's 128 MB L3 cache appears decisive.

Data-oriented workloads follow the same pattern. PassMark data compression shows 685,074 for the 9900X3D against 294,298, a 132.8% delta. Data encryption shows 33,282 versus 14,925, a 123% delta. Extended instructions show 55,426 versus 20,778, a 166.8% delta. Integer math shows 179,727 versus 86,227, a 108.4% delta. Floating-point math shows 119,622 versus 52,971, a 125.8% delta.

The 9900X3D also leads in memory-sensitive tests. Random string sorting shows 71,864 versus 32,344, a 122.2% delta. The multithread PassMark score is 56,154 versus 24,779, a 126.6% delta.

The only narrow margin is PassMark single-thread, where the 9900X3D scores 4,646 against 3,955, a 17.5% delta. Even in this contest, the desktop chip leads, but the AI 7 PRO 450's Zen 5 cores demonstrate that per-thread performance at 28 W is respectable.

The Cinebench R15 results mirror the newer R23 runs. Multicore shows 4,811 versus 2,457, a 95.8% delta. Single-core shows 679 versus 220, a 208.6% delta. The R15 single-core gap is notable because it exceeds the R23 single-core gap in percentage terms, suggesting the AI 7 PRO 450 does not scale as well under the older benchmark's workload characteristics.

The nearest rivals in the database frame the 9900X3D's standing. It sits 0.6% below the Intel Core Ultra 5 245KF (average score 55,093) and 1.3% above the Intel Core Ultra 5 245K (average score 54,053). The AI 7 PRO 450 sits 0.1% below the Intel Core i9-12900T (average score 37,112) and 0.2% below the AMD Ryzen 7 7735H (average score 37,161). The delta between the two AMD chips in average score is roughly 47.6% in favor of the 9900X3D, a gap that the single-thread tests do not close.