AMD Ryzen 5 PRO 8640HS vs AMD Ryzen 7 5800X3D Comparison

The AMD Ryzen 5 PRO 8640HS and AMD Ryzen 7 5800X3D present a sharp contrast in design goals, with the former prioritizing modern efficiency and single-thread speed and the latter leveraging raw core count and massive cache for brute-force throughput. Benchmark data shows a clear split: the Ryzen 7 5800X3D wins the majority of head-to-head tests, taking 10 of 15 comparisons, but the Ryzen 5 PRO 8640HS secures the most decisive victories in single-threaded and modern rendering workloads.

Head-to-Head Benchmarks

The most dramatic result in the database is in Cinebench R23 single-core performance. The Ryzen 5 PRO 8640HS scores 2555 against the Ryzen 7 5800X3D's 1452, a 76% advantage. This is the largest delta between the two processors in any test and underscores the architectural leap from Zen 3 to Zen 4. The gap is also visible in PassMark single-thread tests, where the 8640HS leads 3561 to 3234, a 10.1% improvement. Cinebench R15 single-core shows a narrower win for the 8640HS at 257 versus 241, a 6.6% edge.

The Ryzen 7 5800X3D fights back in multi-threaded workloads, but the results are mixed. In Cinebench R15 multicore, the 5800X3D scores 2413 against 1824 for the 8640HS, a 24.4% lead. However, the 8640HS reverses the result in Cinebench R23 multicore, scoring 18104 to 14317, which is 26.5% ahead. This inversion is notable: the newer Zen 4 chip appears better optimized for the heavier R23 workload, while the older Zen 3 part retains an edge in the lighter R15 test.

PassMark tests overwhelmingly favor the Ryzen 7 5800X3D. The largest margin comes in find prime numbers, where the 5800X3D scores 227 against 71, a 68.7% advantage. Physics simulation is similarly lopsided: 2884 versus 1043, a 63.8% gap. Data compression favors the 5800X3D at 329688 versus 246446, a 25.2% lead, while data encryption shows a 26.1% edge with 20258 versus 14962. Integer math goes to the 5800X3D by 21.2% (88608 versus 69839), and extended instructions favor it by 18% (22580 versus 18507). Floating-point math is closer, with the 5800X3D ahead 14.1% (50100 versus 43019), and multithread performance shows a 24.2% lead (28309 versus 21465). Random string sorting is the tightest PassMark contest, with the 5800X3D winning 33776 to 30235, a 10.5% margin.

Overall, the Ryzen 7 5800X3D dominates in compute-heavy integer workloads, while the Ryzen 5 PRO 8640HS excels in single-core and modern multi-threaded rendering. The average benchmark scores reflect this balance: the 8640HS averages 28478 across all tests, slightly above the 5800X3D's 27896, and both sit at the 80th percentile of all CPUs. The nearest rivals for the 8640HS include the Intel Xeon E-2436 at 28530 (0.2% ahead) and the AMD Ryzen 7 PRO 6850HS at 28549 (0.2% ahead). The 5800X3D's closest competitor is the AMD Ryzen 7 6800U at 27887, essentially tied, with the Intel Core i9-10900K just 0.1% behind at 27872.

FAQ

Q: Which processor is faster in single-threaded performance?

A: The AMD Ryzen 5 PRO 8640HS wins every single-thread test. It leads by 76% in Cinebench R23 single-core (2555 versus 1452) and by 10.1% in PassMark single-thread (3561 versus 3234). Cinebench R15 single-core also goes to the 8640HS at 257 versus 241, a 6.6% edge.

Q: Why does the Ryzen 7 5800X3D win so many PassMark tests?

A: The 5800X3D benefits from its larger core and thread count, 8 cores and 16 threads versus 6 cores and 12 threads, and its 96 MB of shared L3 cache. It wins 10 of the head-to-head comparisons, including data compression by 25.2%, encryption by 26.1%, and integer math by 21.2%.

Q: How do the two compare in the latest Cinebench R23 rendering test?

A: The Ryzen 5 PRO 8640HS is decisively ahead in Cinebench R23 multicore, scoring 18104 against 14317, a 26.5% advantage. It also wins single-core by 76%. This suggests the Zen 4 architecture scales better in this specific workload despite having fewer cores.

Q: What is the difference in average benchmark scores?

A: The Ryzen 5 PRO 8640HS has an average benchmark score of 28478, while the Ryzen 7 5800X3D averages 27896. Both processors sit at the 80th percentile of all CPUs in the database.

Q: Which chip has a higher boost clock?

A: The Ryzen 5 PRO 8640HS has a boost clock of 4.90 GHz, compared to 4.50 GHz for the Ryzen 7 5800X3D. The 8640HS also has a slightly higher base clock of 3.50 GHz versus 3.40 GHz.

Q: What are the power characteristics of each processor?

A: The Ryzen 5 PRO 8640HS is rated at 28 W TDP, making it a low-power mobile part, while the Ryzen 7 5800X3D is a desktop chip with a 105 W TDP. The 8640HS is built on a 4 nm process, while the 5800X3D uses a 7 nm process.

The Verdict

The data supports a clear split based on workload. The Ryzen 7 5800X3D is the choice for users who prioritize heavy multi-threaded integer tasks, as it wins PassMark multithread by 24.2%, data compression by 25.2%, and physics simulation by 63.8%. Its 8-core, 16-thread configuration and 96 MB L3 cache provide a substantial edge in these areas.

The Ryzen 5 PRO 8640HS is the better option for single-threaded responsiveness and modern rendering. Its 76% lead in Cinebench R23 single-core and 26.5% lead in Cinebench R23 multicore indicate that Zen 4 brings significant per-clock improvements. It also wins PassMark single-thread by 10.1% and Cinebench R15 single-core by 6.6%.

For a desktop user running diverse workloads, the 5800X3D's broader win count (10 versus 5) makes it the stronger all-rounder. For a mobile user or anyone prioritizing efficiency, the 8640HS offers competitive performance at a fraction of the power envelope, 28 W versus 105 W.

Specification Differences

The two processors differ in nearly every fundamental specification. The Ryzen 5 PRO 8640HS has 6 cores and 12 threads, while the Ryzen 7 5800X3D has 8 cores and 16 threads. Base clocks are close, 3.50 GHz versus 3.40 GHz, but the boost clock favors the 8640HS, 4.90 GHz versus 4.50 GHz. TDP is vastly different: 28 W for the 8640HS against 105 W for the 5800X3D.

Memory support diverges completely. The 8640HS uses DDR5 with dual-channel memory and a bandwidth of 89.6 GB/s, while the 5800X3D uses DDR4 with dual-channel memory and a bandwidth of 51.2 GB/s. Both support ECC memory. The sockets are incompatible: the 8640HS uses AMD Socket FP7, while the 5800X3D uses AMD Socket AM4.

The integrated graphics also differ. The 8640HS includes Radeon 760M graphics, while the 5800X3D has no integrated GPU. The 8640HS is an active mobile part released on 2024-04-15, while the 5800X3D is an end-of-life desktop part released on 2022-04-19. The 5800X3D has a recorded launch MSRP of $449. The 8640HS has two part numbers, 100-000001354 (FP7r2) and 100-000001382 (FP7), while the 5800X3D has a single part number, 100-000000651.

Architecture Differences

The architectural gap is substantial. The Ryzen 5 PRO 8640HS uses the Zen 4 architecture on the Hawk Point codename, while the Ryzen 7 5800X3D uses Zen 3 on the Vermeer codename. The process node differs significantly: the 8640HS is built on a 4 nm process at TSMC, while the 5800X3D uses a 7 nm process at the same foundry.

Transistor counts and die sizes highlight the different design approaches. The 8640HS packs 25,000 million transistors on a 178 mm² die, while the 5800X3D has 8,850 million transistors on a 74 mm² die. This makes the 8640HS a denser, more complex chip.

Cache configurations also differ. Both share 64 KB of L1 per core, but the L2 cache is 1 MB per core on the 8640HS versus 512 KB per core on the 5800X3D. The L3 cache is where the 5800X3D dominates: 96 MB shared versus 16 MB shared on the 8640HS. This large L3 cache explains the 5800X3D's strong showing in data-heavy PassMark tests. Both use PCIe Gen 4 with 20 lanes from the CPU.

The 8640HS belongs to the 8000 series and Ryzen 5 generation (Zen 4 Hawk Point), while the 5800X3D belongs to the 5000 series and Ryzen 7 generation (Zen 3 Vermeer). The 8640HS targets the mobile market segment, while the 5800X3D targets desktop.

Where Each One Wins

The Ryzen 7 5800X3D wins in almost every PassMark compute test. It leads in data compression by 25.2%, data encryption by 26.1%, extended instructions by 18%, find prime numbers by 68.7%, floating-point math by 14.1%, integer math by 21.2%, multithread by 24.2%, physics by 63.8%, and random string sorting by 10.5%. It also wins Cinebench R15 multicore by 24.4%. This makes it the clear pick for scientific computing, data processing, and any workload that scales with core count and cache size.

The Ryzen 5 PRO 8640HS wins in every single-thread test and in Cinebench R23. It takes Cinebench R15 single-core by 6.6%, Cinebench R23 single-core by 76%, Cinebench R23 multicore by 26.5%, and PassMark single-thread by 10.1%. Its wins suggest it is better suited for lightly threaded applications, responsive desktop use, and modern rendering engines that benefit from Zen 4's IPC improvements.

The 8640HS also holds advantages in efficiency and platform features. Its 28 W TDP, DDR5 memory support, higher memory bandwidth of 89.6 GB/s, and integrated Radeon 760M graphics make it a complete mobile package. The 5800X3D requires a discrete GPU and consumes 105 W, but its 96 MB L3 cache and 8-core design give it unmatched performance in cache-sensitive and heavily threaded tasks. Choose the 5800X3D for raw compute density, choose the 8640HS for single-thread speed, modern rendering, and low power draw.