AMD Ryzen AI Embedded P185i vs AMD Ryzen Embedded 8840U Comparison

The Verdict

The recorded data positions the AMD Ryzen AI Embedded P185i and the AMD Ryzen Embedded 8840U as two distinct mobile processors sharing a socket, a process node, and a power envelope. The P185i delivers a 12-core, 24-thread configuration built on the Gorgon Point generation with a hybrid Zen 5 / Zen 5c core layout, while the 8840U offers an 8-core, 16-thread design based on Zen 4 architecture under the Hawk Point codename. Both parts target embedded mobile systems, both support ECC memory, and both carry a 28 TDP rating, but the internal designs diverge significantly in core count, cache structure, and integrated graphics.

For workloads that scale with thread count, the P185i is the clear selection: its 12 cores and 24 threads provide a 50% increase in core count and a 50% increase in thread count over the 8840U. For tasks that rely on higher base frequency and mature Zen 4 efficiency, the 8840U holds a base clock advantage of 3.30 GHz versus 2.00 GHz on the P185i, though both boost to 5.10 GHz. The integrated graphics also differ: the P185i includes the Radeon 890M, while the 8840U carries the Radeon 780M. Neither processor has recorded benchmark scores or nearest rival data in the database, so the verdict relies on architectural specifications rather than measured performance deltas.

The P185i suits systems needing more parallel throughput, larger per-core L1 cache (80 KB per core versus 64 KB per core), and the newer Zen 5 / Zen 5c hybrid topology. The 8840U suits systems where the higher base clock and a smaller, more established die (178 mm² versus 233 mm²) matter for thermal or power delivery constraints, and where the 20 PCIe Gen 4 lanes available on the CPU provide more expansion headroom than the 16 lanes on the P185i. The data does not indicate a universal winner; it indicates a trade-off between core count and base frequency, with each part leading in specific specifications.

Architecture Differences

The two processors share a 4 nm TSMC fabrication node and the AMD Socket FP8 package, but their internal architectures diverge at the generation level. The P185i belongs to the Gorgon Point generation and uses a hybrid core arrangement labeled Zen 5 / Zen 5c, which combines high-performance and high-density cores in a 12-core, 24-thread configuration. The 8840U uses a homogeneous Zen 4 architecture across its 8 cores and 16 threads, under the Hawk Point codename and the 8000 series family.

The process node is identical at 4 nm and the foundry is TSMC for both parts, but the die size differs: the P185i measures 233 mm², while the 8840U is smaller at 178 mm². The 8840U has a published transistor count of 25,000 million, while the P185i does not list a transistor figure in the database. This suggests the P185i’s larger die accommodates additional cores, a different cache hierarchy, and a newer graphics block.

Cache organization shows a clear split. The P185i provides 80 KB of L1 cache per core and 1 MB of L2 cache per core, with 16 MB of L3 cache. The 8840U provides 64 KB of L1 per core and 1 MB of L2 per core, with 16 MB of L3 shared across all cores. Both parts offer the same total L3 capacity, but the P185i’s larger per-core L1 gives each thread more immediate data storage. The L2 per core matches at 1 MB, so the cache scaling follows the core count: the P185i aggregates more total L1 and L2 capacity across its 12 cores.

Memory support differs slightly. Both processors use dual-channel memory and achieve 89.6 GB/s of memory bandwidth, and both support ECC memory. The P185i supports both DDR5 and LPDDR5X memory types, while the 8840U lists only DDR5 in the database. This gives the P185i additional flexibility for low-power memory configurations in embedded designs.

PCIe lane counts also differ. The 8840U provides 20 PCIe Gen 4 lanes from the CPU, while the P185i provides 16 PCIe Gen 4 lanes from the CPU. For embedded systems with multiple PCIe add-in cards or NVMe storage devices, the 8840U offers more direct connectivity. The integrated graphics differ as well: the P185i pairs with the Radeon 890M, and the 8840U uses the Radeon 780M. The database does not list detailed graphics specifications beyond these model names.

Both processors share a 28 TDP rating, a 5.10 GHz boost clock, and an active production status. The release dates differ: the 8840U entered production status with a release date of 2024-04-01, while the P185i has a release date of 2026-02-28. Neither processor has an unlocked multiplier, so overclocking is not supported according to the recorded data.

Head-to-Head Benchmarks

The database contains no recorded benchmark scores for either processor. The head-to-head benchmark array is empty, and both processors show an average benchmark score of 0 and a percentile rank of 50 against all CPUs. The nearest rivals lists are also empty for both parts. This means the head-to-head comparison must be derived from specification differences rather than measured performance data.

The most significant arithmetic advantage for the P185i is in core and thread counts. The P185i provides 12 cores versus 8 cores on the 8840U, a 50% increase. Threads scale identically: 24 threads versus 16 threads, also a 50% increase. For multi-threaded embedded workloads that can use all available threads, this core advantage should translate into higher throughput, assuming similar per-core performance between Zen 5 / Zen 5c and Zen 4.

The 8840U counters with a base clock advantage. The 8840U runs at 3.30 GHz base, while the P185i runs at 2.00 GHz base. That is a 65% higher base clock for the 8840U. Both processors boost to 5.10 GHz, so single-thread peak performance may be comparable, but sustained all-core operation at base clocks favors the 8840U. The hybrid Zen 5 / Zen 5c design on the P185i likely has different frequency characteristics for its high-density cores, but the database does not provide per-core clock details.

Cache capacity per core favors the P185i in L1: 80 KB per core versus 64 KB per core, a 25% increase per core. With 12 cores, the P185i’s aggregate L1 capacity is substantially larger. The L2 per core matches at 1 MB, and the L3 totals match at 16 MB. The P185i’s larger die (233 mm² versus 178 mm²) suggests additional logic for the extra cores and graphics block, but the database does not specify transistor counts for the P185i.

PCIe connectivity favors the 8840U with 20 CPU lanes versus 16 on the P185i, a 25% increase in lane count. For systems that need multiple high-speed peripherals, this is a concrete specification win for the 8840U. Memory bandwidth is identical at 89.6 GB/s, and both support dual-channel configurations.

The integrated graphics comparison shows a model number difference: Radeon 890M on the P185i and Radeon 780M on the 8840U. Without benchmark data, the database cannot quantify the graphics performance gap. The release date difference is substantial: the 8840U released in 2024-04-01, while the P185i releases in 2026-02-28, indicating a newer design for the P185i.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen AI Embedded P185i has 12 cores and 24 threads. The AMD Ryzen Embedded 8840U has 8 cores and 16 threads. The P185i provides 50% more cores and 50% more threads.

Q: Do both processors use the same manufacturing process?

A: Yes, both use a 4 nm process from TSMC. They also share the same AMD Socket FP8 package and the same 28 TDP rating.

Q: What is the base clock difference between the two?

A: The 8840U has a base clock of 3.30 GHz, while the P185i has a base clock of 2.00 GHz. Both processors boost to 5.10 GHz.

Q: How does the cache compare between the two processors?

A: The P185i provides 80 KB of L1 cache per core and 1 MB of L2 per core, with 16 MB of L3 cache. The 8840U provides 64 KB of L1 per core and 1 MB of L2 per core, with 16 MB of L3 shared. L3 totals are equal at 16 MB.

Q: Which processor supports LPDDR5X memory?

A: Only the P185i lists LPDDR5X as a supported memory type in addition to DDR5. The 8840U lists DDR5 only. Both support dual-channel memory and ECC memory.

Q: Which processor offers more PCIe lanes?

A: The 8840U offers 20 PCIe Gen 4 lanes from the CPU, while the P185i offers 16 PCIe Gen 4 lanes from the CPU. The 8840U provides a 25% higher lane count.

Q: Are there any recorded benchmark scores for these processors?

A: No. The database shows an average benchmark score of 0 for both processors, and the nearest rivals lists are empty. The percentile rank for both is 50.

Where Each One Wins

The AMD Ryzen AI Embedded P185i wins in scenarios that demand parallel compute throughput. Its 12 cores and 24 threads give it a clear structural advantage over the 8-core, 16-thread 8840U. The larger L1 cache per core (80 KB versus 64 KB) supports workloads with high data locality per thread. The newer Gorgon Point generation with Zen 5 / Zen 5c cores places it ahead in architectural generation, and its release date of 2026-02-28 indicates a more recent design. The support for both DDR5 and LPDDR5X memory gives system designers more flexibility in memory selection. The Radeon 890M integrated graphics represents a newer graphics block than the 780M, though the database does not quantify the graphics performance delta. The P185i also uses a larger die (233 mm²), which likely accommodates the additional cores and newer graphics logic.

The AMD Ryzen Embedded 8840U wins in scenarios where base frequency matters for latency-sensitive or lightly threaded tasks. Its 3.30 GHz base clock is substantially higher than the 2.00 GHz base on the P185i, providing a sustained frequency advantage when all cores are not fully loaded. The 20 PCIe Gen 4 lanes from the CPU exceed the 16 lanes on the P185i, making the 8840U better suited for systems with multiple high-speed expansion devices. The smaller die (178 mm²) may simplify thermal design in compact embedded chassis, and the published transistor count of 25,000 million provides a known baseline for the design. The earlier release date of 2024-04-01 means the 8840U has a longer production history in the database, which could indicate broader ecosystem availability. The homogeneous Zen 4 architecture avoids the hybrid-core scheduling considerations that come with the Zen 5 / Zen 5c arrangement on the P185i.

The database does not provide measured performance scores, so the exact magnitude of these advantages remains unquantified. The specification sheet shows a clear division: the P185i leads in core count, thread count, per-core L1 cache, memory type flexibility, and generation recency. The 8840U leads in base clock, PCIe lane count, die size efficiency, and has a documented transistor count. Systems that prioritize multi-threaded embedded workloads should lean toward the P185i, while systems that prioritize peripheral expansion and higher sustained base clocks should lean toward the 8840U. The shared boost clock of 5.10 GHz means peak single-thread frequency is identical, and the shared 89.6 GB/s memory bandwidth means memory throughput is not a differentiator. The shared 28 TDP and 4 nm process node mean power and thermal envelopes are equivalent at the specification level.