AMD Ryzen 9 8945HX vs AMD Ryzen AI 5 430 Comparison

The AMD Ryzen 9 8945HX and the AMD Ryzen AI 5 430 are both mobile processors, but they serve entirely different performance tiers. The database shows the Ryzen 9 8945HX winning all 15 recorded head-to-head benchmarks, with an average benchmark score of 76212 against 19617 for the Ryzen AI 5 430. The Ryzen 9 8945HX sits at the 95th percentile of all CPUs, while the Ryzen AI 5 430 sits at the 73rd percentile.

The Verdict

The benchmark data points to a clear performance hierarchy. The AMD Ryzen 9 8945HX is the dominant part in this comparison, holding a 288.3% higher average benchmark score (76212 versus 19617). Its closest rivals in the database are the Intel Core Ultra 9 285HX (0.1% higher average score), the AMD EPYC Embedded 8224P (0.4% higher), the AMD Ryzen Threadripper PRO 9945WX (0.4% higher), and the AMD Ryzen 9 9950X3D (0.6% lower). These are all high-end desktop or workstation-class parts, which places the Ryzen 9 8945HX in a performance class far above the Ryzen AI 5 430.

The AMD Ryzen AI 5 430, by contrast, competes with the AMD Ryzen 5 5500 (0.1% higher average score), the Intel Core i5-12500 (0.3% higher), the Intel Core i5-11600KF (0.5% higher), and the Intel Core i7-10700F (0.6% lower). These are mainstream desktop processors from several generations ago, indicating that the Ryzen AI 5 430 offers roughly desktop-level performance from several years ago, not the multi-threaded throughput of a flagship mobile HX part.

For workloads that scale with core count, the Ryzen 9 8945HX is the only choice. Its advantage in multi-threaded tests is massive, ranging from 198.6% in PassMark physics to 495.5% in PassMark find prime numbers. For single-threaded work, the margin shrinks dramatically. The Ryzen 9 8945HX still wins the PassMark single-thread test, but only by 6.1%, with scores of 3907 versus 3683. This indicates that the Ryzen AI 5 430 is more competitive in lightly threaded tasks, though it still trails.

Architecture Differences

The two processors are built on different architectures, nodes, and sockets. The Ryzen 9 8945HX uses Zen 4 architecture under the Dragon Range codename, part of the Ryzen 9 generation. It is fabricated on a 5 nm process at TSMC. The Ryzen AI 5 430 uses a mixed Zen 5 / Zen 5c configuration under the Gorgon Point codename, part of the Ryzen AI 400 generation, and is fabricated on a 4 nm process at TSMC.

The Ryzen 9 8945HX has 16 cores and 32 threads, while the Ryzen AI 5 430 has 4 cores and 8 threads. This 4x difference in core count is the primary driver of the multi-threaded performance gap. The Ryzen 9 8945HX has 13,140 million transistors on a die size of 2x 71 mm², while the Ryzen AI 5 430 has no transistor count or die size recorded in the database.

Cache configurations also differ substantially. The Ryzen 9 8945HX has 64 KB of L1 cache per core, 1 MB of L2 cache per core, and a large 64 MB L3 cache. The Ryzen AI 5 430 has a larger L1 cache per core at 80 KB, the same 1 MB L2 cache per core, but only a 4 MB L3 cache. The L3 cache difference, 64 MB versus 4 MB, is among the largest architectural gaps between the two parts.

Memory support differs as well. The Ryzen 9 8945HX supports DDR5 only, while the Ryzen AI 5 430 supports both DDR5 and LPDDR5X. Both use a dual-channel memory bus, but the Ryzen AI 5 430 has a slightly higher memory bandwidth at 89.6 GB/s compared to 83.2 GB/s for the Ryzen 9 8945HX. The Ryzen AI 5 430 also supports ECC memory, which the Ryzen 9 8945HX does not. PCIe connectivity is another differentiator: the Ryzen 9 8945HX offers Gen 5 with 28 lanes, while the Ryzen AI 5 430 offers Gen 4 with 14 lanes. The Ryzen 9 8945HX has an unlocked multiplier, whereas the Ryzen AI 5 430 does not.

Head-to-Head Benchmarks

The Cinebench results establish the scale of the performance gap. In Cinebench R23 multi-core, the Ryzen 9 8945HX scores 42713 versus 8130 for the Ryzen AI 5 430, a 425.4% advantage. The Cinebench R23 single-core test shows a 235.6% advantage, with scores of 6030 and 1797. Cinebench R15 shows a similar pattern: 4305 versus 1195 in multi-core (260.3% advantage) and 607 versus 269 in single-core (125.7% advantage). The Ryzen 9 8945HX also recorded a Cinebench R20 multi-core score of 17939 and a single-core score of 2532, tests for which the Ryzen AI 5 430 has no recorded data.

PassMark results reinforce the multi-threaded dominance. In PassMark integer math, the Ryzen 9 8945HX scores 195180 against 39637, a 392.4% advantage. Floating point math shows 117453 versus 27193, a 331.9% advantage. Data compression shows 677755 versus 158912, a 326.5% advantage. Data encryption shows 40836 versus 7591, a 438% advantage. Extended instructions show 49823 versus 11455, a 334.9% advantage. Random string sorting shows 78781 versus 16623, a 373.9% advantage. Find prime numbers shows 262 versus 44, the largest single delta at 495.5%.

The PassMark multithread score of 51405 versus 13320 represents a 285.9% advantage for the Ryzen 9 8945HX. The PassMark physics test shows 2168 versus 726, a 198.6% advantage. The only close result is PassMark single-thread, where the Ryzen 9 8945HX scores 3907 and the Ryzen AI 5 430 scores 3683, a 6.1% margin. This narrow single-thread gap suggests that the newer Zen 5 / Zen 5c cores in the Ryzen AI 5 430 narrow the per-core performance deficit considerably, though they cannot overcome the Ryzen 9 8945HX's much higher boost clock of 5.40 GHz versus 4.50 GHz.

Specification Differences

The two processors differ across nearly every recorded specification. The Ryzen 9 8945HX has 16 cores and 32 threads, while the Ryzen AI 5 430 has 4 cores and 8 threads. Base clocks are 2.50 GHz for the Ryzen 9 8945HX and 2.00 GHz for the Ryzen AI 5 430. Boost clocks are 5.40 GHz and 4.50 GHz, respectively. Thermal design power is 55 watts for the Ryzen 9 8945HX and 28 watts for the Ryzen AI 5 430.

The Ryzen 9 8945HX uses AMD Socket FL1, while the Ryzen AI 5 430 uses AMD Socket FP8. The Ryzen 9 8945HX is Zen 4 with the Dragon Range codename, while the Ryzen AI 5 430 is Zen 5 / Zen 5c with the Gorgon Point codename. Process nodes are 5 nm and 4 nm, both at TSMC. The Ryzen 9 8945HX has 13,140 million transistors and a 2x 71 mm² die size; the Ryzen AI 5 430 has no recorded transistor count or die size.

L1 cache is 64 KB per core for the Ryzen 9 8945HX and 80 KB per core for the Ryzen AI 5 430. Both have 1 MB L2 per core. L3 cache is 64 MB for the Ryzen 9 8945HX and 4 MB for the Ryzen AI 5 430. Memory support is DDR5 for the Ryzen 9 8945HX versus DDR5 and LPDDR5X for the Ryzen AI 5 430. Memory bandwidth is 83.2 GB/s versus 89.6 GB/s. ECC memory is unsupported on the Ryzen 9 8945HX and supported on the Ryzen AI 5 430. PCIe is Gen 5 with 28 lanes versus Gen 4 with 14 lanes. Integrated graphics are Radeon 610M on the Ryzen 9 8945HX and Radeon 840M on the Ryzen AI 5 430. The Ryzen 9 8945HX has an unlocked multiplier; the Ryzen AI 5 430 does not. Release dates are 2025-04-22 for the Ryzen 9 8945HX and 2026-01-04 for the Ryzen AI 5 430.

FAQ

Q: Which processor is faster in Cinebench R23 multi-core?

A: The AMD Ryzen 9 8945HX scores 42713 in Cinebench R23 multi-core, which is 425.4% higher than the Ryzen AI 5 430's score of 8130.

Q: How large is the single-threaded performance gap?

A: In PassMark single-thread, the Ryzen 9 8945HX scores 3907 versus 3683 for the Ryzen AI 5 430, a 6.1% advantage. The Cinebench R23 single-core gap is larger at 235.6%, with scores of 6030 and 1797.

Q: What are the core and thread counts?

A: The Ryzen 9 8945HX has 16 cores and 32 threads. The Ryzen AI 5 430 has 4 cores and 8 threads.

Q: Do these processors use the same socket?

A: No. The Ryzen 9 8945HX uses AMD Socket FL1, while the Ryzen AI 5 430 uses AMD Socket FP8.

Q: Which processor supports ECC memory?

A: The Ryzen AI 5 430 supports ECC memory, while the Ryzen 9 8945HX does not.

Q: What is the thermal design power of each?

A: The Ryzen 9 8945HX has a TDP of 55 watts, and the Ryzen AI 5 430 has a TDP of 28 watts.