AMD Ryzen AI Embedded P185 vs AMD Ryzen Embedded 8640U Comparison

FAQ

Q: What are the core and thread counts of the AMD Ryzen AI Embedded P185 and the AMD Ryzen Embedded 8640U?

A: The AMD Ryzen AI Embedded P185 uses 12 cores and 24 threads, while the AMD Ryzen Embedded 8640U uses 6 cores and 12 threads.

Q: Which processor has the higher boost clock?

A: The AMD Ryzen AI Embedded P185 reaches a boost clock of 5.10 GHz, which is higher than the 4.90 GHz boost clock of the AMD Ryzen Embedded 8640U.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen AI Embedded P185 and the AMD Ryzen Embedded 8640U support ECC memory.

Q: What are the integrated graphics solutions in each processor?

A: The AMD Ryzen AI Embedded P185 integrates a Radeon 890M, whereas the AMD Ryzen Embedded 8640U integrates a Radeon 760M.

Q: How does the L1 cache differ between the two?

A: The AMD Ryzen AI Embedded P185 has 80 KB of L1 cache per core, while the AMD Ryzen Embedded 8640U has 64 KB of L1 cache per core.

Q: Which processor holds a higher percentile ranking among all CPUs?

A: The AMD Ryzen AI Embedded P185 ranks in the 93rd percentile, while the AMD Ryzen Embedded 8640U sits in the 50th percentile.

Architecture Differences

The two processors share the same manufacturing foundation: both are built on a 4 nm process at TSMC and both use the AMD Socket FP8. The internal design, however, diverges significantly. The AMD Ryzen AI Embedded P185 uses the Gorgon Point codename and belongs to the Ryzen AI Embedded generation built on Zen 5 / Zen 5c cores. The AMD Ryzen Embedded 8640U uses the Hawk Point codename and is based on the older Zen 4 architecture.

The core count difference is substantial. The P185 doubles the 8640U in both cores and threads, 12 cores and 24 threads versus 6 cores and 12 threads. This alone explains much of the performance gap in heavily threaded workloads. The process node is identical, but the die sizes differ, with the P185 measuring 233 mm² versus 178 mm² for the 8640U. The 8640U lists a transistor count of 25,000 million, while the P185 does not report a transistor figure.

Cache organization shows both similarities and differences. Both processors feature 1 MB of L2 cache per core and 16 MB of L3 cache. The L1 cache differs: the P185 provides 80 KB per core, while the 8640U provides 64 KB per core. The 8640U specifies its L3 as shared, which is typical for the design.

The integrated graphics are different tiers. The P185 pairs with a Radeon 890M, while the 8640U uses a Radeon 760M. Memory support also differs: the P185 supports both DDR5 and LPDDR5X, while the 8640U supports DDR5 only. Both run dual-channel memory with a bandwidth of 89.6 GB/s. PCIe lane counts differ as well, with the P185 offering Gen 4 with 16 lanes (CPU only) and the 8640U offering Gen 4 with 20 lanes (CPU only). The 8640U is part of the 8000 series and carries a release date of 2024-04-01, while the P185 is from the Ryzen AI Embedded line with a release date of 2026-02-28.

Where Each One Wins

The AMD Ryzen AI Embedded P185 is the clear performance leader in the recorded data. Its multithread score of 31817, single-thread score of 3977, and average benchmark score of 62839 place it far ahead of the AMD Ryzen Embedded 8640U, which has no recorded benchmark scores in the database. The P185 also holds a 93rd percentile ranking versus the 50th percentile for the 8640U.

The P185 wins in every functional category where data exists. Integer math, floating point math, data compression, data encryption, extended instructions, prime number finding, random string sorting, and physics simulations all favor the P185. The 12-core, 24-thread configuration gives it a structural advantage in parallel workloads, while the higher boost clock of 5.10 GHz supports single-thread responsiveness.

The AMD Ryzen Embedded 8640U does hold advantages in areas outside raw compute. It provides 20 PCIe Gen 4 lanes compared to 16 for the P185, which may matter for systems requiring more expansion connectivity from the CPU. Its smaller die size of 178 mm² and lower core count could also imply different physical integration characteristics, though the database does not record power consumption beyond the shared 28 W TDP. The 8640U also has an earlier release date, which may be relevant for designs that were locked in before the newer part became available.

For applications that depend on the integrated GPU, the P185 has the stronger Radeon 890M versus the Radeon 760M. For applications that rely on CPU-side PCIe expansion, the 8640U offers more lanes. The P185 is the choice for compute density; the 8640U is the choice for connectivity breadth.

Specification Differences

| Specification | AMD Ryzen AI Embedded P185 | AMD Ryzen Embedded 8640U |

|---|---|---|

| Cores | 12 | 6 |

| Threads | 24 | 12 |

| Base clock | 2.00 GHz | 3.50 GHz |

| Boost clock | 5.10 GHz | 4.90 GHz |

| Codename | Gorgon Point | Hawk Point |

| Generation | Ryzen AI Embedded (Zen 5 / Zen 5c) | Ryzen Embedded (Zen 4) |

| Die size | 233 mm² | 178 mm² |

| Transistors | Not reported | 25,000 million |

| L1 cache | 80 KB (per core) | 64 KB (per core) |

| L3 cache | 16 MB | 16 MB (shared) |

| Memory support | DDR5, LPDDR5X | DDR5 |

| PCIe | Gen 4, 16 lanes (CPU only) | Gen 4, 20 lanes (CPU only) |

| Integrated graphics | Radeon 890M | Radeon 760M |

| Release date | 2026-02-28 | 2024-04-01 |

| Percentile | 93 | 50 |

The base clock is the only specification where the 8640U leads: 3.50 GHz versus 2.00 GHz. The P185 counters with a higher boost clock of 5.10 GHz versus 4.90 GHz. Both processors share a 28 W TDP, dual-channel memory buses, 89.6 GB/s memory bandwidth, ECC support, 1 MB L2 per core, and 16 MB L3. Both use the same socket and the same 4 nm TSMC process.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two processors, and the AMD Ryzen Embedded 8640U has no recorded benchmark results at all. The comparison therefore rests on the P185's own benchmark scores and the specification differences between the two parts.

The P185 delivers a multithread score of 31817. With double the cores and threads of the 8640U, this score reflects the parallel throughput advantage of the Zen 5 / Zen 5c design. The single-thread score of 3977 also stands as the stronger result, supported by the 5.10 GHz boost clock versus the 8640U's 4.90 GHz.

In compute-specific tests, the P185 records 117832 in integer math and 70587 in floating point math. Data workloads show 374429 in data compression and 19612 in data encryption. Extended instruction performance reaches 26544. The prime number finding test returns 129, random string sorting returns 40557, and the physics test returns 1772. The average benchmark score for the P185 is 62839.

The P185's nearest rivals in the database are all Intel and AMD parts with average scores close to its own. The Intel Core Ultra 7 255HX averages 62738, which is 0.2% behind the P185. The Intel Core i7-13790F averages 63080, 0.4% ahead. The Intel Core Ultra 7 265HX averages 63173, 0.5% ahead. The AMD Ryzen AI 9 PRO 465 averages 62498, 0.5% behind. These deltas place the P185 in a tight competitive band where no rival moves more than half a percentage point away.

The 8640U, by contrast, has no nearest rivals and an average benchmark score of 0 in the database. Its 50th percentile ranking places it at the median of all CPUs, while the P185 sits at the 93rd percentile. The specification gap between the two AMD parts is larger than the gap between the P185 and its closest Intel competitors. The 8640U's 6 cores, 12 threads, and lower boost clock position it as a smaller embedded part, while the P185's 12 cores, 24 threads, and higher boost clock position it as the higher-tier option in the same socket.