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

The Verdict

The data is unambiguous: the AMD Ryzen 7 8840HX dominates the AMD Ryzen AI 5 435 across every single recorded benchmark. Out of 13 head-to-head tests, the 8840HX wins all 13, with the Ryzen AI 5 435 recording zero wins. The magnitude of the lead varies from a narrow 2.3% in Cinebench R23 single-core to a massive 424.1% in PassMark find prime numbers. The 8840HX sits in the 94th percentile of all CPUs in the database, while the Ryzen AI 5 435 sits in the 80th percentile. Its average benchmark score of 71,797 is nearly 2.6 times the 28,128 average of the Ryzen AI 5 435.

The Ryzen 7 8840HX is the clear choice for applications that demand heavy parallel processing, content creation workloads, or any task that scales with core count and cache. The Ryzen AI 5 435, with its lower TDP of 28 watts versus 55 watts, is positioned for thinner, lighter systems where power efficiency matters more than raw throughput. However, based strictly on measured performance, the 8840HX is the superior processor in every category the database records. Users who need maximum performance should select the 8840HX; users who prioritize a 28-watt thermal envelope and a newer Zen 5 architecture should consider the Ryzen AI 5 435, but they must accept a substantial performance deficit.

Architecture Differences

The two processors come from different architectural generations and target different market segments within the mobile space. The Ryzen 7 8840HX belongs to the 8000 series and uses the Zen 4 architecture with the codename Dragon Range. It is built on a 5 nm process at TSMC, contains 13,140 million transistors, and uses a dual-chiplet design with a die size of 2x 71 mm². The Ryzen AI 5 435, meanwhile, uses the newer Zen 5 architecture (with Zen 5c cores) under the codename Gorgon Point, part of the Ryzen AI 400 generation. It is fabricated on a 4 nm process at TSMC, though the database lists no transistor count or die size for this part.

Core configurations differ significantly. The 8840HX has 12 cores and 24 threads. The Ryzen AI 5 435 has 6 cores and 12 threads, exactly half the core and thread count. Base clocks also diverge: the 8840HX runs at 2.90 GHz base and boosts to 5.10 GHz, while the Ryzen AI 5 435 runs at 2.00 GHz base and boosts to 4.50 GHz. The 8840HX has a higher TDP at 55 watts versus 28 watts, reflecting its higher power ceiling.

Cache hierarchies are markedly different. The 8840HX provides 64 KB of L1 cache per core, 1 MB of L2 cache per core, and a substantial 64 MB of shared L3 cache. The Ryzen AI 5 435 provides 80 KB of L1 per core, 1 MB of L2 per core, but only 4 MB of L3 cache. That 60 MB difference in L3 cache is likely a major contributor to the performance gap, particularly in multi-threaded and data-intensive workloads.

Memory support also differs. The 8840HX supports DDR5 memory only, on a dual-channel bus, with a memory bandwidth of 83.2 GB/s. The Ryzen AI 5 435 supports both DDR5 and LPDDR5X, also on a dual-channel bus, with a slightly higher memory bandwidth of 89.6 GB/s. The Ryzen AI 5 435 also supports ECC memory, while the 8840HX does not. PCIe connectivity diverges as well: the 8840HX offers Gen 5 with 28 lanes (CPU only), while the Ryzen AI 5 435 offers Gen 4 with 14 lanes (CPU only). The 8840HX has an unlocked multiplier, while the Ryzen AI 5 435 is locked. Integrated graphics differ too: the 8840HX uses Radeon 610M, while the Ryzen AI 5 435 uses Radeon 840M. The 8840HX uses AMD Socket FL1, while the Ryzen AI 5 435 uses AMD Socket FP8. The 8840HX was released on 2025-04-22, while the Ryzen AI 5 435 has a release date of 2026-01-04. Both parts are marked as Active in production status.

Head-to-Head Benchmarks

The largest single win for the 8840HX comes in PassMark find prime numbers, where it scores 304 against 58 for the Ryzen AI 5 435, a delta of 424.1%. This test is heavily dependent on integer arithmetic and cache performance, and the 8840HX's 64 MB L3 cache and higher clock speeds give it an overwhelming advantage.

In PassMark data encryption, the 8840HX scores 29,919 versus 11,110, a 169.3% lead. This workload benefits from the 8840HX's additional cores and threads. PassMark integer math shows a 140.1% advantage (146,506 versus 61,026), and PassMark random string sorting shows a 132.9% advantage (57,971 versus 24,891). PassMark extended instructions gives the 8840HX a 125.5% lead (36,527 versus 16,197).

The Cinebench R23 multi-core test, a standard measure of all-core rendering performance, shows the 8840HX scoring 25,265 versus 11,333, a 122.9% advantage. This is roughly double the multi-core performance, consistent with the 2x core and thread count advantage. PassMark multi-thread follows a similar pattern: 41,732 versus 19,000, a 119.6% lead. PassMark data compression gives the 8840HX a 120.3% edge (496,427 versus 225,374). PassMark floating point math shows a 113.5% lead (86,747 versus 40,627), and PassMark physics shows a 103.3% advantage (2,185 versus 1,075).

The narrowest margin is in single-core performance. Cinebench R23 single-core shows the 8840HX at 1,857 versus 1,816, a 2.3% lead. PassMark single-thread (and the duplicate single_thread entry) shows 3,958 versus 3,734, a 6.0% lead. This indicates that the Zen 5 architecture in the Ryzen AI 5 435 partially compensates for its lower clock speeds, but the 8840HX still wins even in single-threaded workloads.

Specification Differences

The two processors differ in every major specification category recorded in the database. Core count: 12 versus 6. Thread count: 24 versus 12. Base clock: 2.90 GHz versus 2.00 GHz. Boost clock: 5.10 GHz versus 4.50 GHz. TDP: 55 watts versus 28 watts. Socket: AMD Socket FL1 versus AMD Socket FP8. Architecture: Zen 4 versus Zen 5. Codename: Dragon Range versus Gorgon Point. Generation: Ryzen 7 (Zen 4 (Dragon Range)) versus Ryzen AI 400 (Zen 5 / Zen 5c). Process node: 5 nm versus 4 nm. Transistors: 13,140 million versus not listed. Die size: 2x 71 mm² versus not listed.

L1 cache: 64 KB per core versus 80 KB per core. L2 cache: 1 MB per core on both. L3 cache: 64 MB shared versus 4 MB. Memory support: DDR5 only versus DDR5 and LPDDR5X. Memory bandwidth: 83.2 GB/s versus 89.6 GB/s. ECC memory: false versus true. PCIe: Gen 5, 28 lanes versus Gen 4, 14 lanes. Integrated graphics: Radeon 610M versus Radeon 840M. Multiplier unlocked: true versus false. Part number: 100-000001850 versus 100-000001337. Release date: 2025-04-22 versus 2026-01-04. The series field lists "8000 series" for the 8840HX, while no series is listed for the Ryzen AI 5 435. Neither part has a launch MSRP recorded in the database.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen 7 8840HX has 12 cores and 24 threads. The AMD Ryzen AI 5 435 has 6 cores and 12 threads. The 8840HX offers exactly double the core and thread count.

Q: What is the performance difference in multi-core rendering?

A: In Cinebench R23 multi-core, the Ryzen 7 8840HX scores 25,265 while the Ryzen AI 5 435 scores 11,333. The 8840HX leads by 122.9%. In PassMark multi-thread, the 8840HX scores 41,732 versus 19,000, a 119.6% advantage.

Q: Which processor has the larger L3 cache?

A: The Ryzen 7 8840HX has 64 MB of shared L3 cache. The Ryzen AI 5 435 has only 4 MB of L3 cache. The difference is 60 MB, which likely contributes significantly to the 8840HX's large leads in data-heavy workloads.

Q: Is the Ryzen AI 5 435 more power efficient?

A: Yes, the Ryzen AI 5 435 has a TDP of 28 watts compared to 55 watts for the Ryzen 7 8840HX. This lower thermal envelope suggests it is designed for thinner, lighter laptops, though it comes at a substantial performance cost.

Q: Which processor is newer and uses a more advanced process node?

A: The Ryzen AI 5 435 has a release date of 2026-01-04 and uses a 4 nm process. The Ryzen 7 8840HX has a release date of 2025-04-22 and uses a 5 nm process. The Ryzen AI 5 435 also uses the newer Zen 5 architecture versus Zen 4 in the 8840HX.

Q: How do the processors compare in single-core performance?

A: The Ryzen 7 8840HX wins but by a narrow margin. In Cinebench R23 single-core, it scores 1,857 versus 1,816, a 2.3% lead. In PassMark single-thread, it scores 3,958 versus 3,734, a 6.0% lead. The gap is much smaller than in multi-core tests.

Where Each One Wins

The Ryzen 7 8840HX wins every benchmark in the database. Its 13 wins out of 13 head-to-head tests include dominant margins in multi-threaded workloads: Cinebench R23 multi-core (122.9% ahead), PassMark multi-thread (119.6%), PassMark integer math (140.1%), PassMark data encryption (169.3%), and PassMark find prime numbers (424.1%). It also wins single-threaded tests, though by much smaller margins (2.3% to 6.0%). The 8840HX is the appropriate choice for workloads that can use 12 cores and 24 threads, benefit from 64 MB of L3 cache, and require high sustained clock speeds up to 5.10 GHz. Its 94th percentile ranking among all CPUs in the database reinforces its position as a high-end mobile processor.

The Ryzen AI 5 435 wins no recorded benchmarks. Its advantages are architectural and functional rather than performance-based. It uses the newer Zen 5 architecture on a 4 nm process, supports both DDR5 and LPDDR5X memory, provides ECC memory support, and has a lower 28-watt TDP. Its memory bandwidth of 89.6 GB/s is higher than the 83.2 GB/s of the 8840HX. It also has a larger L1 cache per core (80 KB versus 64 KB). These features may appeal to users who need ECC support or prefer the newer architecture and lower power draw, but the measured data shows no workload where the Ryzen AI 5 435 outperforms the 8840HX.

For use-case planning, the 8840HX is the processor for rendering, compilation, video encoding, scientific computing, and any heavily multi-threaded task. Its 64 MB L3 cache also makes it strong for database work, large data sets, and compression workloads. The Ryzen AI 5 435, given its 6 cores and 4 MB L3 cache, is better suited to light productivity, everyday computing, and systems where the 28-watt TDP enables fanless or ultra-thin designs. However, users should be aware that the Ryzen AI 5 435 delivers roughly half the multi-core performance of the 8840HX in Cinebench R23 (11,333 versus 25,265) and less than half in most PassMark multi-threaded tests. The 8840HX also holds a modest edge in single-threaded performance, so even light workloads see a small benefit from choosing it. The only reasons to select the Ryzen AI 5 435 are its newer architecture, ECC support, LPDDR5X compatibility, and lower power envelope.