AMD Ryzen 7 8840HX vs AMD Ryzen AI 5 PRO 435 Comparison

FAQ

Q: Which processor has the higher multi-core performance in Cinebench R23?

A: The AMD Ryzen 7 8840HX scores 25,265 points in Cinebench R23 multi-core, while the AMD Ryzen AI 5 PRO 435 does not have a recorded score for that test in the database. The 8840HX also leads in PassMark multithread with 41,732 versus 19,091, a 118.6% advantage.

Q: What is the difference in single-thread performance between the two?

A: The Ryzen 7 8840HX records 3,958 in PassMark single-thread, compared to 3,757 for the Ryzen AI 5 PRO 435. That is a 5.4% lead for the 8840HX, the smallest margin of any head-to-head benchmark between these two parts.

Q: Which processor has the larger L3 cache?

A: The Ryzen 7 8840HX has 64 MB of shared L3 cache. The Ryzen AI 5 PRO 435 has 4 MB of L3 cache, a 16x difference in favor of the 8840HX.

Q: Do both processors support ECC memory?

A: No. The Ryzen AI 5 PRO 435 supports ECC memory, while the Ryzen 7 8840HX does not.

Q: What are the process nodes for each chip?

A: The Ryzen 7 8840HX is built on a 5 nm process at TSMC. The Ryzen AI 5 PRO 435 uses a 4 nm process, also at TSMC.

Q: Which processor has a higher boost clock?

A: The Ryzen 7 8840HX boosts to 5.10 GHz. The Ryzen AI 5 PRO 435 boosts to 4.50 GHz, a 0.60 GHz gap.

Architecture Differences

The two processors belong to different architectural generations and market positions. The Ryzen 7 8840HX is part of the 8000 series, uses Zen 4 architecture, and carries the Dragon Range codename. The Ryzen AI 5 PRO 435 uses Zen 5 architecture with the Gorgon Point codename and belongs to the Ryzen AI PRO 400 generation, which combines Zen 5 and Zen 5c cores. The process node also differs: the 8840HX is fabricated on TSMC's 5 nm node, while the AI 5 PRO 435 uses TSMC's 4 nm node.

Core and thread counts diverge sharply. The 8840HX provides 12 cores and 24 threads, while the AI 5 PRO 435 provides 6 cores and 12 threads. This 2x difference in both cores and threads explains much of the multi-threaded gap in the benchmark data. The L1 cache structure also differs: the 8840HX has 64 KB per core and the AI 5 PRO 435 has 80 KB per core, but the L3 totals are on completely different scales. The 8840HX has 64 MB shared L3, while the AI 5 PRO 435 has 4 MB L3.

The integrated graphics differ as well. The 8840HX pairs with Radeon 610M graphics, while the AI 5 PRO 435 uses Radeon 840M. Memory support is broader on the AI 5 PRO 435, which accepts both DDR5 and LPDDR5X, whereas the 8840HX lists DDR5 only. Memory bandwidth favors the AI 5 PRO 435 at 89.6 GB/s versus 83.2 GB/s for the 8840HX, despite the 8840HX having double the cores. ECC memory is supported only on the AI 5 PRO 435. PCIe connectivity goes the other way: the 8840HX has Gen 5 with 28 CPU lanes, while the AI 5 PRO 435 has Gen 4 with 14 CPU lanes.

Power and physical specifications also separate the two. The 8840HX has a 55 W TDP, uses AMD Socket FL1, and is unlocked for multiplier adjustments. The AI 5 PRO 435 has a 28 W TDP, uses AMD Socket FP8, and is locked. The 8840HX lists 13,140 million transistors across a 2x 71 mm² die, while the AI 5 PRO 435 has no transistor count or die size recorded in the database. The 8840HX also has a larger physical footprint in the cache hierarchy and a different part number, 100-000001850 versus 100-000001788.

Where Each One Wins

The Ryzen 7 8840HX wins every head-to-head benchmark recorded in the database, taking all 11 comparisons. Its largest advantages appear in compute-heavy workloads. The prime number search test shows a 433.3% lead, the encryption test shows a 165.5% lead, and integer math shows a 140.7% lead. These results indicate a processor built for sustained multi-threaded throughput, which matches its 12-core, 24-thread configuration and 64 MB L3 cache.

The AI 5 PRO 435 is not without strengths in the data. Its single-thread score of 3,757 trails by only 5.4%, the closest result in the entire comparison. Its 89.6 GB/s memory bandwidth exceeds the 8840HX's 83.2 GB/s, and its support for LPDDR5X and ECC memory gives it platform flexibility the 8840HX lacks. The 4 nm process and 28 W TDP also indicate a lower-power design, though the database does not record power measurements for direct comparison.

In practical terms, the 8840HX is the choice for workloads that scale with cores, threads, and cache: rendering, compilation, encryption, and floating-point math. The AI 5 PRO 435 is positioned for efficiency-sensitive mobile systems, with a smaller core count but a newer architecture and more modern process node. The percentile rankings reflect this split: the 8840HX sits at the 94th percentile among all CPUs, while the AI 5 PRO 435 sits at the 86th percentile.

Specification Differences

The two processors differ on nearly every major specification field. Core count is 12 versus 6, thread count is 24 versus 12, base clock is 2.90 GHz versus 2.00 GHz, and boost clock is 5.10 GHz versus 4.50 GHz. TDP is 55 W versus 28 W. Socket is AMD Socket FL1 versus AMD Socket FP8.

The cache hierarchy diverges completely. L1 cache is 64 KB per core on the 8840HX versus 80 KB per core on the AI 5 PRO 435. L2 cache is 1 MB per core on both. L3 cache is 64 MB shared on the 8840HX versus 4 MB on the AI 5 PRO 435.

Memory support differs: the 8840HX supports DDR5 only, while the AI 5 PRO 435 supports DDR5 and LPDDR5X. Both use dual-channel memory buses. Memory bandwidth is 83.2 GB/s on the 8840HX versus 89.6 GB/s on the AI 5 PRO 435. ECC memory is absent on the 8840HX and present on the AI 5 PRO 435.

PCIe capability differs in both generation and lane count. The 8840HX uses Gen 5 with 28 CPU lanes; the AI 5 PRO 435 uses Gen 4 with 14 CPU lanes. Integrated graphics are Radeon 610M on the 8840HX and Radeon 840M on the AI 5 PRO 435. The multiplier is unlocked on the 8840HX and locked on the AI 5 PRO 435. Architecture is Zen 4 versus Zen 5, codename is Dragon Range versus Gorgon Point, and process node is 5 nm versus 4 nm, both at TSMC.

Release dates differ by several months. The 8840HX was released on 2025-04-22, while the AI 5 PRO 435 was released on 2026-01-04. Neither processor has a launch MSRP recorded in the database.

Head-to-Head Benchmarks

The head-to-head results show a dominant performance profile for the Ryzen 7 8840HX across every workload in the database. The largest gap comes in PassMark's find prime numbers test, where the 8840HX scores 304 against 57 for the AI 5 PRO 435, a 433.3% difference. This test is heavily dependent on integer throughput and cache behavior, and it highlights the effect of the 8840HX's 12 cores, 24 threads, and 64 MB L3 cache.

Data encryption shows the second-largest margin. The 8840HX records 29,919, more than double the AI 5 PRO 435's 11,267, for a 165.5% lead. Integer math follows with 146,506 versus 60,879, a 140.7% advantage. Random string sorting shows 57,971 versus 24,936, a 132.5% lead. These results point to a processor that sustains high throughput when the workload can use many threads.

Physics simulation and multithread tests both land near the 120% mark. The physics test shows 2,185 versus 995, a 119.6% lead, and the multithread test shows 41,732 versus 19,091, a 118.6% lead. Extended instructions show 36,527 versus 16,724, a 118.4% lead. Data compression shows 496,427 versus 232,803, a 113.2% lead. Floating-point math shows 86,747 versus 41,114, a 111% lead.

The only close result is single-thread performance. The 8840HX scores 3,958, and the AI 5 PRO 435 scores 3,757, a 5.4% difference. This narrow margin indicates that the Zen 5 architecture in the AI 5 PRO 435 narrows the per-core gap, even though the 8840HX has a higher boost clock at 5.10 GHz versus 4.50 GHz. The database records the single-thread result under two test names, passmark_single_thread and passmark_singlethread, both with identical scores.

The average benchmark score reflects the overall separation. The 8840HX has an average benchmark score of 71,797, while the AI 5 PRO 435 has 37,762. The nearest rivals in the database confirm the positioning: the 8840HX sits close to the Intel Core Ultra 7 265KF, which has an average score of 71,910 and a delta of -0.2%, and the AI 5 PRO 435 sits near the Intel Core i5-13600K, which has an average score of 37,685 and a delta of 0.2%.

The data shows a clean sweep for the 8840HX across all 11 head-to-head benchmarks. The AI 5 PRO 435 closes the gap in single-thread work and offers newer architecture, a smaller process node, and platform features like ECC and LPDDR5X support, but the multi-threaded and cache-sensitive workloads all favor the 12-core part by wide margins.