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

Head-to-Head Benchmarks

The benchmark comparison between the AMD Ryzen 9 9900X and the AMD Ryzen AI 7 445 is one-sided across every recorded test. The Ryzen 9 9900X wins all 15 head-to-head comparisons, with the largest margin appearing in PassMark find prime numbers, where it scores 436 against 56, a 678.6% advantage. This extreme gap reflects the desktop part's ability to sustain heavily parallel integer workloads far beyond what the mobile chip can manage.

In multi-threaded rendering, the Ryzen 9 9900X delivers 32,172 points in Cinebench R23 multi-core versus 10,590 for the Ryzen AI 7 445, a 203.8% lead. The older Cinebench R15 multi-core test shows a similar pattern: 5,008 versus 1,723, a 190.7% difference. These results indicate that the 12-core, 24-thread desktop processor roughly triples the throughput of the 6-core, 12-thread mobile part in sustained all-core workloads.

Single-thread performance tells a closer but still decisive story. In Cinebench R23 single-core, the Ryzen 9 9900X scores 2,253 versus 1,806, a 24.8% advantage. The Cinebench R15 single-core gap is larger at 39%, with scores of 353 and 254. PassMark single-thread shows 4,672 against 3,591, a 30.1% lead. These margins confirm that even when only one core is active, the higher boost clock of 5.60 GHz on the 9900X outperforms the 4.60 GHz peak of the Ryzen AI 7 445.

PassMark's math and encryption workloads amplify the difference. Floating point math scores 120,083 versus 39,362, a 205.1% gap. Integer math reaches 181,056 versus 58,332, a 210.4% difference. Data encryption shows 33,421 versus 10,519, a 217.7% lead. Data compression follows with 683,579 versus 215,812, a 216.7% margin. Extended instructions, which exercise AVX and similar paths, produce the second-largest gap at 249.1%, with 55,243 points against 15,826.

The multi-thread aggregate score in PassMark lands at 54,643 for the 9900X versus 18,115 for the 445, a 201.6% gap. Physics simulation, another heavily threaded workload, shows 3,381 versus 976, a 246.4% difference. Random string sorting completes the sweep with 72,013 versus 23,488, a 206.6% margin.

The average benchmark score positions these parts far apart. The Ryzen 9 9900X averages 57,498 points and sits in the 92nd percentile among all CPUs. The Ryzen AI 7 445 averages 26,936 points and ranks in the 79th percentile. The nearest rivals for the 9900X include the AMD EPYC 9015 at 57,555 (0.1% higher) and the Intel Core i9-14900 at 58,115 (1.1% higher). The 445's closest competition includes the Intel Core i7-1370P at 26,900 (0.1% lower) and the AMD Ryzen 7 5700G at 27,051 (0.4% higher).

The Verdict

The data points to a clear split by use case. The AMD Ryzen 9 9900X is the choice for any workload that scales with cores, threads, or sustained all-core boosting. Its 12 cores and 24 threads, combined with a 120 W TDP, deliver roughly triple the multi-threaded performance of the Ryzen AI 7 445 in rendering, math, encryption, and compression. The 24.8% to 39% single-thread margins also mean the desktop part is faster in lightly threaded tasks, though the gap narrows there.

The AMD Ryzen AI 7 445 serves a different market segment entirely. As a mobile processor with a 28 W TDP, it targets laptops where power efficiency and compact packaging matter more than raw throughput. Its 6 cores and 12 threads still place it in the 79th percentile of all CPUs, with an average score of 26,936. That places it within 0.1% of the Intel Core i7-1370P and within 0.6% of the Intel Core i9-9900K, which are older or lower-power desktop and mobile designs respectively.

Neither processor is a substitute for the other. The 9900X requires an AMD Socket AM5 motherboard and a desktop platform, while the 445 uses AMD Socket FP8 and is built for mobile systems. The 9900X launched with an MSRP of $499 and has an unlocked multiplier, making it a desktop enthusiast part. The 445 has no launch MSRP recorded and its multiplier is locked, reflecting its fixed mobile role.

Architecture Differences

Both processors share the Zen 5 architecture and a 4 nm TSMC process node, but they diverge in almost every other physical and platform attribute. The Ryzen 9 9900X belongs to the 9000 series with the Granite Ridge codename, while the Ryzen AI 7 445 is part of the Ryzen AI 400 generation with the Gorgon Point codename. The 9900X uses pure Zen 5 cores, whereas the 445 combines Zen 5 and Zen 5c cores in its design.

Core counts differ substantially. The 9900X has 12 cores and 24 threads; the 445 has 6 cores and 12 threads. Base clocks are 4.40 GHz for the desktop part versus 2.00 GHz for the mobile part. Boost clocks reach 5.60 GHz and 4.60 GHz respectively. TDP ratings are 120 W for the 9900X and 28 W for the 445, a 4.3x difference that explains much of the performance gap.

Cache hierarchies also diverge sharply. The 9900X carries 64 MB of L3 cache, while the 445 has only 4 MB. Both use 80 KB of L1 per core and 1 MB of L2 per core. The desktop part's large L3 cache benefits workloads that repeatedly access shared data, whereas the mobile part's smaller cache limits such reuse.

Memory support overlaps on DDR5, but the 445 adds LPDDR5X support for mobile power efficiency. Both use dual-channel memory buses with 89.6 GB/s bandwidth. ECC memory support is present on both. PCIe capabilities differ: the 9900X provides Gen 5 with 24 CPU lanes, while the 445 provides Gen 4 with 14 CPU lanes. Integrated graphics also differ, with the 9900X using Radeon Graphics and the 445 using the newer Radeon 840M.

The 9900X reports a transistor count of 16,630 million and a die size of 2x 70.6 mm². The 445 does not have transistor or die size data recorded. The 9900X uses a dual-chiplet design, consistent with its larger L3 and higher core count, while the 445's monolithic mobile design prioritizes lower power and smaller physical footprint.

Release dates also separate the parts. The 9900X launched on 2024-08-14, while the 445 is dated 2026-01-04. Both are listed as active production parts. The 9900X has an unlocked multiplier; the 445 does not. The desktop part's part number is 100-000000662, and the mobile part's is 100-000001935.

FAQ

Q: Which processor has more cores and threads?

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

Q: How much faster is the Ryzen 9 9900X in Cinebench R23 multi-core?

A: The Ryzen 9 9900X scores 32,172 versus 10,590 for the Ryzen AI 7 445, a 203.8% advantage.

Q: Does the Ryzen AI 7 445 win any benchmark in the head-to-head data?

A: No. The Ryzen 9 9900X wins all 15 head-to-head benchmarks. The Ryzen AI 7 445 has zero wins in the recorded comparisons.

Q: What is the single-thread performance difference?

A: In Cinebench R23 single-core, the Ryzen 9 9900X scores 2,253 versus 1,806, a 24.8% lead. PassMark single-thread shows 4,672 versus 3,591, a 30.1% gap.

Q: Do both processors use the same architecture?

A: Yes, both use Zen 5 architecture and a 4 nm TSMC process node. However, the Ryzen 9 9900X uses pure Zen 5 cores, while the Ryzen AI 7 445 uses a mix of Zen 5 and Zen 5c cores.

Q: How do their memory and PCIe capabilities compare?

A: Both support DDR5 with dual-channel memory and 89.6 GB/s bandwidth. The Ryzen AI 7 445 adds LPDDR5X support. The Ryzen 9 9900X provides PCIe Gen 5 with 24 lanes, while the Ryzen AI 7 445 provides PCIe Gen 4 with 14 lanes.

Where Each One Wins

The AMD Ryzen 9 9900X wins every recorded benchmark, but the magnitude of its wins varies by workload type. The largest margins appear in heavily parallel integer and floating-point tasks. PassMark find prime numbers shows a 678.6% advantage, extended instructions a 249.1% lead, and physics simulation a 246.4% gap. These workloads benefit directly from the 9900X's 12 cores, 24 threads, and 64 MB L3 cache, which allow far more concurrent work and better data reuse than the 445's 6 cores and 4 MB L3.

Encoding and compression workloads also favor the desktop part decisively. Data compression scores 216.7% higher on the 9900X, and random string sorting is 206.6% higher. Data encryption shows a 217.7% margin. These tasks scale with thread count and memory bandwidth, both of which favor the desktop design despite identical 89.6 GB/s memory bandwidth ratings.

Rendering and general multi-core productivity follow the same pattern. Cinebench R23 multi-core at 203.8% and R15 multi-core at 190.7% show that the 9900X roughly triples the 445's output. The overall PassMark multi-thread score confirms this at 201.6%.

The AMD Ryzen AI 7 445 wins no recorded benchmark, but its strengths lie outside raw performance. Its 28 W TDP makes it suitable for thin-and-light mobile systems where thermal limits and battery life are primary constraints. Its support for LPDDR5X memory and PCIe Gen 4 lanes aligns with mobile platform requirements. The Radeon 840M integrated graphics provides a newer GPU option than the 9900X's Radeon Graphics, though no graphics benchmarks are recorded in this data.

For single-thread responsiveness, the 9900X still leads, but the gap narrows. The 24.8% margin in Cinebench R23 single-core and 30.1% in PassMark single-thread mean that everyday tasks like web browsing or office applications would feel closer in performance. The 445's 4.60 GHz boost clock and Zen 5 cores keep it competitive in lightly threaded scenarios, just not at the same level as the 9900X's 5.60 GHz boost.

The verdict from the database is unambiguous: the Ryzen 9 9900X is the high-performance desktop choice, while the Ryzen AI 7 445 is the mobile efficiency choice. Neither part encroaches on the other's territory, and the 4.3x TDP difference between 120 W and 28 W defines their respective roles more clearly than any single benchmark score.