AMD Ryzen 9 9900X3D vs AMD Ryzen AI 7 445 Comparison

Head-to-Head Benchmarks

The recorded data shows a completely one-sided comparison. The AMD Ryzen 9 9900X3D wins all 15 shared benchmark tests, with the widest gap appearing in compute-heavy workloads. The largest single delta is in PassMark find prime numbers, where the 9900X3D scores 544 against 56 for the Ryzen AI 7 445, a 871.4% advantage. That test isolates raw integer iteration speed, and the desktop chip simply overwhelms the mobile part.

Cinebench results tell a similar story. In Cinebench R23 multi-core, the 9900X3D posts 47737 versus 10590, a 350.8% lead. The single-core gap in that same test is 6739 versus 1806, a 273.1% difference. Cinebench R15 shows a smaller but still decisive margin: 4811 versus 1723 in multi-core (179.2% ahead) and 679 versus 254 in single-core (167.3% ahead). These numbers indicate the 9900X3D does not merely scale better with more threads; its per-thread performance is also substantially higher.

PassMark integer math confirms the pattern. The 9900X3D records 179727, while the Ryzen AI 7 445 manages 58332, a 208.1% delta. Floating point math shows 119622 versus 39362, a 203.9% gap. Extended instructions widen further: 55426 versus 15826, a 250.2% difference. Data compression and encryption follow suit, with the desktop processor leading by 217.4% and 216.4% respectively.

The closest contest appears in PassMark single-thread performance. The 9900X3D scores 4646, and the Ryzen AI 7 445 scores 3591, a 29.4% delta. That is still a clear win, but it is the only benchmark where the mobile chip comes within 30%. Physics simulation shows a 447.1% gap (5340 versus 976), and random string sorting shows a 206% gap (71864 versus 23488). The multi-thread PassMark score of 56154 versus 18115 represents a 210% lead.

Where Each One Wins

The Ryzen 9 9900X3D wins every category in this comparison. There is no benchmark in the shared set where the Ryzen AI 7 445 takes a single victory. The data breaks down into two clear performance tiers based on workload type.

For heavily parallel workloads, the 9900X3D is in a different class. Cinebench R23 multi-core and PassMark multi-thread both show leads above 200%. The 12-core, 24-thread configuration with a 120W TDP delivers throughput that the 6-core, 12-thread mobile chip cannot approach. The 350.8% lead in Cinebench R23 multi-core is the largest multi-threaded delta in the entire dataset.

For lightly threaded tasks, the gap narrows but remains decisive. PassMark single-thread shows the 9900X3D ahead by 29.4%, and Cinebench R23 single-core shows a 273.1% lead. The latter result is notable because it combines both clock speed and architectural efficiency. The 9900X3D boosts to 5.50 GHz, while the Ryzen AI 7 445 tops out at 4.60 GHz. That 0.90 GHz difference in boost clock, combined with the desktop chip's higher base clock of 4.40 GHz versus 2.00 GHz, explains much of the single-thread advantage.

The Ryzen AI 7 445 has no winning use case within this shared benchmark set. Its strengths lie outside the measured tests, such as its mobile form factor and lower power envelope. Within the database's recorded workloads, every metric favors the desktop part.

The Verdict

The data points to a simple conclusion: the Ryzen 9 9900X3D is the stronger processor in every measured workload. Its average benchmark score of 54762 places it at the 91st percentile of all CPUs in the database. The Ryzen AI 7 445, by contrast, averages 26936 and sits at the 79th percentile. The difference in overall average score is roughly a factor of two.

The nearest rivals for the 9900X3D are Intel Core Ultra 5 245KF (55093, -0.6% delta), Intel Core Ultra 5 245K (54053, 1.3% delta), Intel Xeon 6505P (53701, 2% delta), and Intel Core i7-14700F (53620, 2.1% delta). The 9900X3D sits slightly below the Ultra 5 245KF in average score, but remains competitive with that group. The Ryzen AI 7 445's nearest rivals include Intel Core i7-1370P (26900, 0.1% delta), AMD Ryzen 5 7545U (26849, 0.3% delta), AMD Ryzen 7 5700G (27051, -0.4% delta), and Intel Core i9-9900K (27097, -0.6% delta). It lands in the middle of that cluster.

For a desktop build with no power constraints, the 9900X3D is the obvious pick. Its 120W TDP and unlocked multiplier suit a full-size system. For a compact laptop or thin-and-light device, the Ryzen AI 7 445 is the only realistic option of the two, given its 28W TDP and mobile socket. The choice is not about performance parity; it is about platform fit.

FAQ

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 9 9900X3D boosts to 5.50 GHz, while the AMD Ryzen AI 7 445 boosts to 4.60 GHz.

Q: What is the difference in core count?

A: The Ryzen 9 9900X3D has 12 cores and 24 threads. The Ryzen AI 7 445 has 6 cores and 12 threads.

Q: How large is the L3 cache on each processor?

A: The Ryzen 9 9900X3D has 128 MB of L3 cache. The Ryzen AI 7 445 has 4 MB of L3 cache.

Q: Which processor supports PCIe Gen 5?

A: The Ryzen 9 9900X3D supports PCIe Gen 5 with 24 lanes (CPU only). The Ryzen AI 7 445 supports PCIe Gen 4 with 14 lanes (CPU only).

Q: What is the TDP difference?

A: The Ryzen 9 9900X3D has a TDP of 120W. The Ryzen AI 7 445 has a TDP of 28W.

Q: Do both processors use the same memory type?

A: Both support DDR5, but the Ryzen AI 7 445 additionally supports LPDDR5X. Both use a dual-channel memory bus with 89.6 GB/s bandwidth, and both support ECC memory.

Architecture Differences

Both processors are built on AMD's Zen 5 architecture and use a 4 nm process node from TSMC. The similarities end there. The Ryzen 9 9900X3D uses the Granite Ridge codename and belongs to the Ryzen 9 generation. It is a desktop part with a dual-die design, consisting of two 70.6 mm² dies and 16,630 million transistors. The Ryzen AI 7 445 uses the Gorgon Point codename and belongs to the Ryzen AI 400 generation. It is a mobile part, and its transistor count and die size are not recorded in the database.

The cache hierarchy differs substantially. Both use 80 KB of L1 cache per core and 1 MB of L2 cache per core. The L3 cache, however, is 128 MB on the 9900X3D versus 4 MB on the Ryzen AI 7 445. That 32x difference in L3 capacity is the single largest architectural gap between the two. The 9900X3D's larger L3 cache directly benefits workloads with large working sets, such as data compression and encryption, where the recorded deltas exceed 200%.

The Ryzen AI 7 445's generation field indicates a hybrid core layout (Zen 5 / Zen 5c), while the 9900X3D uses only Zen 5 cores. The mobile chip's lower base and boost clocks reflect its power target. The 9900X3D is multiplier unlocked, meaning it can be overclocked, while the Ryzen AI 7 445 is locked. The integrated graphics also differ: the 9900X3D uses Radeon Graphics, while the Ryzen AI 7 445 uses the Radeon 840M.

Specification Differences

The two processors differ across every major specification field in the database.

| Specification | Ryzen 9 9900X3D | Ryzen AI 7 445 |

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

| Cores | 12 | 6 |

| Threads | 24 | 12 |

| Base clock | 4.40 GHz | 2.00 GHz |

| Boost clock | 5.50 GHz | 4.60 GHz |

| TDP | 120W | 28W |

| Socket | AMD Socket AM5 | AMD Socket FP8 |

| Codename | Granite Ridge | Gorgon Point |

| Generation | Ryzen 9 (Zen 5 Granite Ridge) | Ryzen AI 400 (Zen 5 / Zen 5c) |

| Transistors | 16,630 million | Not recorded |

| Die size | 2x 70.6 mm² | Not recorded |

| L3 cache | 128 MB | 4 MB |

| Memory support | DDR5 | DDR5, LPDDR5X |

| PCIe | Gen 5, 24 Lanes (CPU only) | Gen 4, 14 Lanes (CPU only) |

| Integrated graphics | Radeon Graphics | Radeon 840M |

| Market segment | Desktop | Mobile |

| Multiplier unlocked | Yes | No |

| Launch MSRP | $599 | Not recorded |

The release date for the 9900X3D is January 5, 2025, while the Ryzen AI 7 445 is dated January 4, 2026. Both are listed as Active in production status. The part numbers are 100-000001368 for the desktop chip and 100-000001935 for the mobile chip. The Ryzen AI 7 445's higher memory support (adding LPDDR5X) suits its mobile role, while the 9900X3D's larger PCIe lane count and Gen 5 support fit a desktop platform with discrete expansion cards. The 9900X3D also carries a recorded launch MSRP of $599, while no MSRP is recorded for the Ryzen AI 7 445.