AMD Ryzen 9 8945HX vs AMD Ryzen AI 5 PRO 435G Comparison

Head-to-Head Benchmarks

The benchmark data shows a decisive performance hierarchy between these two AMD processors. Across all 11 recorded head-to-head comparisons, the AMD Ryzen 9 8945HX wins every single test. The margin varies from a modest single-thread edge to a commanding multi-thread advantage.

The largest gap appears in passmark_find_prime_numbers, where the Ryzen 9 8945HX scores 262 against 55 for the Ryzen AI 5 PRO 435G, a delta of 376.4%. This test is heavily reliant on integer arithmetic and core count, so the 16-core versus 6-core configuration explains the magnitude of the difference.

Passmark_data_encryption shows the second-largest spread. The Ryzen 9 8945HX records 40,836 while the Ryzen AI 5 PRO 435G manages 12,111, a 237.2% advantage. Encryption workloads benefit from parallel execution across many threads, and the Ryzen 9 8945HX has 32 threads compared to 12.

The passmark_integer_math test delivers a 206.4% delta, with scores of 195,180 and 63,707 respectively. This test scales strongly with core count and clock speed, and the Ryzen 9 8945HX combines 16 Zen 4 cores with a 5.40 GHz boost clock.

Random string sorting shows a 187.4% delta (78,781 versus 27,407), while data compression comes in at 167.4% (677,755 versus 253,484). Extended instructions, which tests SIMD and other instruction set extensions, shows a 166.5% advantage (49,823 versus 18,697).

Floating-point math delivers a 170% delta, with the Ryzen 9 8945HX scoring 117,453 against 43,494. The multithread benchmark records a 153.4% delta (51,405 versus 20,285), and physics simulation shows a 117% advantage (2,168 versus 999).

The only close contest is single-thread performance. The Ryzen 9 8945HX scores 3,907 in passmark_single_thread, while the Ryzen AI 5 PRO 435G scores 3,829, a delta of just 2%. This indicates that per-core performance is broadly similar between the two architectures, with the Zen 5 core in the Ryzen AI 5 PRO 435G nearly matching the Zen 4 core in the Ryzen 9 8945HX despite the latter's higher boost clock.

The Ryzen 9 8945HX holds an average benchmark score of 76,212, placing it in the 95th percentile of all CPUs in the database. Its nearest rival, the Intel Core Ultra 9 285HX, scores 76,155, a delta of only 0.1%. The AMD Ryzen 9 9950X3D scores 75,779, putting the 8945HX 0.6% ahead. The AMD EPYC Embedded 8224P and AMD Ryzen Threadripper PRO 9945WX both trail by 0.4%.

The Ryzen AI 5 PRO 435G averages 40,718, placing it in the 87th percentile. Its nearest rival, the Intel Xeon 6357P, scores 40,630, a 0.2% delta. The Intel Core 5 223PE (40,585) and Intel Core 7 253PE (40,557) trail by 0.3% and 0.4% respectively. The Intel Core Ultra X7 368H scores 40,518, a 0.5% gap.

FAQ

Q: Which processor wins in multi-threaded workloads?

A: The AMD Ryzen 9 8945HX wins the passmark_multithread test with 51,405 points versus 20,285 for the Ryzen AI 5 PRO 435G, a 153.4% advantage. The Ryzen 9 8945HX also leads in data compression (677,755 versus 253,484) and integer math (195,180 versus 63,707).

Q: How close is single-thread performance between the two?

A: Very close. The passmark_single_thread test shows the Ryzen 9 8945HX at 3,907 and the Ryzen AI 5 PRO 435G at 3,829, a delta of only 2%. This is the narrowest margin in any recorded benchmark between the two processors.

Q: What is the biggest performance gap between the two?

A: The passmark_find_prime_numbers test shows the largest delta at 376.4%, with the Ryzen 9 8945HX scoring 262 against 55 for the Ryzen AI 5 PRO 435G. The second-largest gap is data encryption at 237.2% (40,836 versus 12,111).

Q: How does the Ryzen 9 8945HX compare to its closest rival?

A: The Ryzen 9 8945HX has an average benchmark score of 76,212, just 0.1% ahead of the Intel Core Ultra 9 285HX at 76,155. It also sits 0.6% ahead of the AMD Ryzen 9 9950X3D at 75,779.

Q: How does the Ryzen AI 5 PRO 435G compare to its closest rival?

A: The Ryzen AI 5 PRO 435G averages 40,718, which is 0.2% ahead of the Intel Xeon 6357P at 40,630. It also leads the Intel Core 5 223PE by 0.3% and the Intel Core 7 253PE by 0.4%.

Q: Which processor scores higher in physics simulation?

A: The Ryzen 9 8945HX scores 2,168 in passmark_physics versus 999 for the Ryzen AI 5 PRO 435G, a 117% advantage. This test benefits from the Ryzen 9 8945HX's higher core count and thread count.

Where Each One Wins

The Ryzen 9 8945HX dominates every recorded benchmark category, so the use-case split is defined by the degree of advantage rather than by any reversal of leadership.

For users running heavily parallel workloads, the Ryzen 9 8945HX is the clear choice. Prime number finding, encryption, integer math, and data compression all show deltas above 167%, indicating that applications which can saturate 16 cores and 32 threads will extract dramatically more throughput from this chip. The 5.40 GHz boost clock and 64 MB of L3 cache further support sustained multi-thread execution.

The Ryzen AI 5 PRO 435G, despite losing every head-to-head test, still delivers respectable per-core performance. Its single-thread score of 3,829 is only 2% behind the Ryzen 9 8945HX, which means daily desktop tasks that rely on one or two threads will feel nearly identical between the two platforms. Its 65 W TDP and desktop market segment position it for systems where power efficiency and lower thermal output matter more than raw parallel throughput.

The Ryzen 9 8945HX also wins decisively in floating-point workloads, scoring 117,453 versus 43,494, a 170% delta. This makes it better suited for scientific computing, 3D rendering, and other numerically intensive applications. The random string sorting test shows a 187.4% delta, indicating an advantage in data processing tasks that involve large in-memory datasets.

For physics simulation, the Ryzen 9 8945HX scores 2,168 against 999, a 117% advantage. This test typically responds to both core count and memory bandwidth, and the Ryzen 9 8945HX's 83.2 GB/s memory bandwidth, while slightly lower than the Ryzen AI 5 PRO 435G's 89.6 GB/s, is paired with far more compute resources.

The Ryzen AI 5 PRO 435G is the only one of the two that supports ECC memory, which may matter for systems requiring error-corrected memory. Its Radeon 840M integrated graphics also differ from the Radeon 610M in the Ryzen 9 8945HX, though no graphics benchmarks are recorded in the database for either processor.

Specification Differences

The two processors differ on nearly every core specification. The Ryzen 9 8945HX uses 16 cores and 32 threads, while the Ryzen AI 5 PRO 435G uses 6 cores and 12 threads. Base clocks are 2.50 GHz versus 2.00 GHz, and boost clocks are 5.40 GHz versus 4.50 GHz.

The Ryzen 9 8945HX has a 55 W TDP, while the Ryzen AI 5 PRO 435G has a 65 W TDP. The sockets differ: the Ryzen 9 8945HX uses AMD Socket FL1, while the Ryzen AI 5 PRO 435G uses AMD Socket AM5. The Ryzen 9 8945HX has an unlocked multiplier; the Ryzen AI 5 PRO 435G is locked.

Memory bandwidth favors the Ryzen AI 5 PRO 435G at 89.6 GB/s versus 83.2 GB/s, though both support DDR5 in dual-channel configuration. ECC memory support is present on the Ryzen AI 5 PRO 435G but absent on the Ryzen 9 8945HX.

PCIe connectivity differs substantially. The Ryzen 9 8945HX supports Gen 5 with 28 lanes, while the Ryzen AI 5 PRO 435G supports Gen 4 with 10 lanes. The integrated graphics differ as well: Radeon 610M on the Ryzen 9 8945HX, Radeon 840M on the Ryzen AI 5 PRO 435G.

Market segment and release timing also differ. The Ryzen 9 8945HX is a mobile part released on 2025-04-22, while the Ryzen AI 5 PRO 435G is a desktop part with a release date of 2026-03-01. Both are listed as active in production.

Architecture Differences

The Ryzen 9 8945HX belongs to the 8000 series and uses Zen 4 architecture under the Dragon Range codename. The Ryzen AI 5 PRO 435G uses the Zen 5 / Zen 5c architecture under the Gorgon Point codename, part of the Ryzen AI PRO 400 generation.

Process nodes differ: the Ryzen 9 8945HX is built on a 5 nm process, while the Ryzen AI 5 PRO 435G uses a 4 nm process. Both are fabricated by TSMC.

Cache hierarchies show notable differences. The Ryzen 9 8945HX has 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 64 MB of L3 cache. The Ryzen AI 5 PRO 435G has 80 KB of L1 cache per core, 1 MB of L2 cache per core, but only 4 MB of L3 cache. The smaller L3 allocation on the Ryzen AI 5 PRO 435G is a major factor in its lower multi-thread scores, particularly in tests that repeatedly access shared data.

The Ryzen 9 8945HX packs 13,140 million transistors across a dual-die design with each die measuring 71 mm². No transistor count or die size is recorded for the Ryzen AI 5 PRO 435G in the database.

The Ryzen 9 8945HX is the only one of the two with an unlocked multiplier, which allows overclocking. The Zen 4 architecture in the Ryzen 9 8945HX and the Zen 5 / Zen 5c hybrid arrangement in the Ryzen AI 5 PRO 435G represent two different design philosophies: the former prioritizes maximum core count and raw throughput, while the latter focuses on per-core efficiency and a smaller physical footprint. The single-thread benchmark delta of just 2% between the two confirms that the newer Zen 5 core design largely closes the per-core performance gap, but the Ryzen 9 8945HX's 16-core configuration remains the dominant factor in every parallel workload recorded in the database.