AMD Ryzen 9 8940HX vs AMD Ryzen AI 5 PRO 435 Comparison

The AMD Ryzen 9 8940HX and the AMD Ryzen AI 5 PRO 435 occupy different tiers in the mobile processor market, and the benchmark data reflects a clear performance hierarchy. The Ryzen 9 8940HX is a high-core-count part designed for maximum throughput, while the Ryzen AI 5 PRO 435 is a more power-efficient hybrid architecture. Analysis of the recorded data shows a consistent and overwhelming advantage for the Ryzen 9 8940HX across every measured workload, with the largest deltas appearing in multi-threaded and cryptographic tasks.

Head-to-Head Benchmarks

The head-to-head results are unambiguous: the Ryzen 9 8940HX wins all 11 recorded benchmark comparisons. The largest margin is in the Passmark find prime numbers test, where the Ryzen 9 8940HX scores 251 against the Ryzen AI 5 PRO 435's 57, a difference of 340.4 percent. This workload is highly sensitive to core count and memory bandwidth, both of which favor the larger chip.

In data encryption, the Ryzen 9 8940HX posts 39,318 versus 11,267 for the Ryzen AI 5 PRO 435, a 249 percent lead. This confirms that the AES and related instruction throughput of the 16-core part is substantially higher. Data compression shows a similar trend: 650,984 compared to 232,803, a 179.6 percent advantage. Integer math also heavily favors the Ryzen 9 8940HX, with a score of 189,221 against 60,879, translating to a 210.8 percent gap. Random string sorting follows suit, at 75,381 versus 24,936, a 202.3 percent difference.

The multi-threaded Passmark score encapsulates the overall parallel performance: the Ryzen 9 8940HX achieves 49,731 while the Ryzen AI 5 PRO 435 manages 19,091, a 160.5 percent lead. Extended instructions (SIMD-heavy workloads) also show a large gap, with 47,802 versus 16,724, a 185.8 percent difference. Floating-point math scores are 113,921 and 41,114 respectively, a 177.1 percent margin. The physics test, which often reflects gaming-relevant thread scheduling, gives the Ryzen 9 8940HX a 111.5 percent advantage (2,104 versus 995).

The closest contest is in single-threaded performance. The Ryzen 9 8940HX scores 3,874 in Passmark single-thread, while the Ryzen AI 5 PRO 435 scores 3,757, a margin of only 3.1 percent. This narrow gap indicates that the Zen 5 architecture in the Ryzen AI 5 PRO 435 has high per-core efficiency, but the higher boost clock of the Ryzen 9 8940HX (5.30 GHz versus 4.50 GHz) is enough to keep it ahead. This is the only benchmark where the two processors are comparable, suggesting that the Ryzen AI 5 PRO 435 is not deficient in single-core capability, but is simply outclassed everywhere else.

Where Each One Wins

The Ryzen 9 8940HX wins in every category where raw throughput matters. Its 16 cores and 32 threads provide a massive advantage in rendering, compilation, data processing, and any workload that scales with core count. The data compression and integer math results indicate strong performance in database operations, file archiving, and general productivity. The encryption and extended instruction scores point to capability in scientific computing and security-related tasks. The physics score suggests that the Ryzen 9 8940HX can handle complex simulation and gaming physics engines with more headroom.

The Ryzen AI 5 PRO 435 does not win any benchmark in this comparison, but its data reveals a specific strength: single-thread efficiency. With a score of 3,757, it trails the Ryzen 9 8940HX by only 3.1 percent despite having 10 fewer cores and a lower boost clock. This indicates that the Zen 5 architecture in the Ryzen AI 5 PRO 435 delivers high instructions per clock, making it suitable for lightly threaded applications such as web browsing, office work, and older software that relies on one or two cores. Its 28-watt TDP also positions it for fanless or ultra-portable designs, where the Ryzen 9 8940HX's 55-watt TDP would be impractical. The Ryzen AI 5 PRO 435 also supports LPDDR5X memory, which can enable lower-power system configurations, and it includes ECC memory support, a feature absent from the Ryzen 9 8940HX.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen 9 8940HX has 16 cores and 32 threads, while the AMD Ryzen AI 5 PRO 435 has 6 cores and 12 threads.

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

A: The Ryzen 9 8940HX leads by 3.1 percent in the Passmark single-thread test, scoring 3,874 versus 3,757 for the Ryzen AI 5 PRO 435.

Q: What is the biggest performance difference in the benchmark data?

A: The largest delta is in the find prime numbers test, where the Ryzen 9 8940HX scores 340.4 percent higher than the Ryzen AI 5 PRO 435.

Q: Does the Ryzen AI 5 PRO 435 support ECC memory?

A: Yes, the Ryzen AI 5 PRO 435 supports ECC memory, while the Ryzen 9 8940HX does not.

Q: Which processor has a higher boost clock?

A: The Ryzen 9 8940HX boosts to 5.30 GHz, which is higher than the Ryzen AI 5 PRO 435's 4.50 GHz.

Q: How do their average benchmark scores compare?

A: The Ryzen 9 8940HX has an average benchmark score of 81,103, placing it in the 95th percentile of all CPUs. The Ryzen AI 5 PRO 435 has an average score of 37,762, placing it in the 86th percentile.

Specification Differences

The two processors differ in nearly every fundamental specification. The Ryzen 9 8940HX uses 16 cores and 32 threads, whereas the Ryzen AI 5 PRO 435 uses 6 cores and 12 threads. Base clocks are 2.40 GHz and 2.00 GHz respectively, with boost clocks of 5.30 GHz and 4.50 GHz. Thermal design power also diverges sharply: the Ryzen 9 8940HX is rated at 55 watts, while the Ryzen AI 5 PRO 435 is rated at 28 watts. They use different sockets, with the Ryzen 9 8940HX on AMD Socket FL1 and the Ryzen AI 5 PRO 435 on AMD Socket FP8. The Ryzen 9 8940HX has an unlocked multiplier, while the Ryzen AI 5 PRO 435 does not.

Memory support differs as well. The Ryzen 9 8940HX supports DDR5 only, with a dual-channel bus and 83.2 GB/s bandwidth. The Ryzen AI 5 PRO 435 supports both DDR5 and LPDDR5X, also dual-channel, with a higher bandwidth of 89.6 GB/s. ECC memory is supported only on the Ryzen AI 5 PRO 435. PCIe connectivity is another differentiator: the Ryzen 9 8940HX offers Gen 5 with 28 lanes (CPU only), while the Ryzen AI 5 PRO 435 offers Gen 4 with 14 lanes (CPU only). The integrated graphics are also different: the Ryzen 9 8940HX uses the Radeon 610M, and the Ryzen AI 5 PRO 435 uses the Radeon 840M. Release dates are separated by a significant period, with the Ryzen 9 8940HX released in 2025 and the Ryzen AI 5 PRO 435 in 2026.

Architecture Differences

The architectural split is a core distinction. The Ryzen 9 8940HX is built on Zen 4 architecture, codenamed Dragon Range, and belongs to the 8000 series. It uses a 5 nm process from TSMC, with 13,140 million transistors and a die size of 2x 71 mm². Its cache hierarchy includes 64 KB of L1 per core, 1 MB of L2 per core, and a total of 64 MB of L3 cache.

The Ryzen AI 5 PRO 435 is built on Zen 5 architecture, codenamed Gorgon Point, and belongs to the Ryzen AI PRO 400 generation, which uses both Zen 5 and Zen 5c cores. It uses a 4 nm process from TSMC; transistor count and die size are not recorded in the database. Its cache configuration differs substantially: 80 KB of L1 per core, 1 MB of L2 per core, but only 4 MB of L3 cache total. This is a 60 MB difference in L3 capacity, which explains part of the Ryzen 9 8940HX's advantage in multi-threaded workloads that benefit from large shared caches. The larger L3 cache on the Ryzen 9 8940HX also contributes to its high data compression and random string sorting scores.

The process node difference is notable: the Ryzen AI 5 PRO 435 uses a 4 nm process versus the 5 nm process of the Ryzen 9 8940HX, which allows the smaller chip to achieve higher memory bandwidth (89.6 GB/s versus 83.2 GB/s) despite lower power consumption. However, the Ryzen 9 8940HX compensates with more cores, a higher boost clock, and a much larger L3 cache. The Ryzen AI 5 PRO 435's hybrid Zen 5 / Zen 5c core design is positioned for efficiency, while the Ryzen 9 8940HX's uniform Zen 4 core layout is optimized for sustained high-frequency operation across all 16 cores.