AMD Ryzen AI Embedded P164 vs AMD Ryzen Embedded 8645HS Comparison

Head-to-Head Benchmarks

The recorded data presents an unusual comparison scenario. The AMD Ryzen AI Embedded P164 has a full suite of benchmark results, while the AMD Ryzen Embedded 8645HS has no recorded benchmark scores in the database. This absence of data for the 8645HS means a direct head-to-head score comparison is not possible from the measurement records. However, the available data for the P164 can be analyzed on its own terms and against its nearest rivals.

The P164's average benchmark score is 52901. This places it in the 91st percentile of all CPUs in the database. Its closest rival, the AMD Ryzen 5 9500F, scores 52873, a delta of 0.1% in favor of the P164. The Intel Xeon 634 scores 52974, which is 0.1% higher than the P164. The AMD EPYC 7313P scores 53206, 0.6% ahead, and the AMD Ryzen 9 7900X scores 53288, 0.7% ahead. These deltas are minimal, indicating the P164 sits in a tightly contested performance band.

Looking at the P164's individual benchmark results, the strongest showing is in PassMark Data Compression with a score of 327891. This is a massive outlier compared to its other scores. The Integer Math test returns 87940, and Floating Point Math scores 55799. The Multi-Thread test scores 25889, Single-Thread scores 4029, and Extended Instructions scores 24193. The Random String Sorting test scores 34801, Data Encryption scores 16055, and Physics scores 1210. The Find Prime Numbers test scores 71. The average benchmark score of 52901 is heavily influenced by the Data Compression result, which is disproportionately large relative to the other workloads.

The percentile ranking of 91 indicates that the P164 outperforms the vast majority of processors in the database across the aggregate of these tests. The delta between the P164 and its nearest rivals is small, ranging from 0.1% to 0.7%. This suggests that in the workloads represented by these tests, the P164 is effectively performance-equivalent to the Ryzen 5 9500F, Xeon 634, EPYC 7313P, and Ryzen 9 7900X. The data shows a clustering of scores within a narrow range, with the P164 holding its own at the lower end of that cluster. The lack of any benchmark data for the 8645HS means the database cannot confirm or deny performance differences between these two specific processors.

Architecture Differences

The two processors differ significantly in their underlying architecture. The Ryzen AI Embedded P164 uses the Gorgon Point codename and belongs to the Ryzen AI Embedded generation built on Zen 5 / Zen 5c cores. The Ryzen Embedded 8645HS uses the Hawk Point codename and is part of the 8000 series, built on Zen 4 architecture. Both are manufactured on a 4 nm process by TSMC, but the P164 has a larger die size of 233 mm² compared to the 8645HS's 178 mm². The 8645HS has a stated transistor count of 25,000 million, while the P164's transistor count is not recorded in the database.

The core and cache configurations differ markedly. The P164 has 8 cores and 16 threads, while the 8645HS has 6 cores and 12 threads. The P164's L1 cache is 80 KB per core, and its L2 cache is 1 MB per core, with 8 MB of L3 cache. The 8645HS has a smaller L1 cache at 64 KB per core, the same 1 MB per core L2 cache, but a larger L3 cache at 16 MB shared. This means the 8645HS has twice the L3 cache of the P164, despite having fewer cores. The P164's cache allocation is per-core for L1 and L2, while the 8645HS's L3 is explicitly shared.

The integrated graphics differ as well. The P164 ships with a Radeon 880M, while the 8645HS uses a Radeon 760M. The database records a higher number for the P164's iGPU model, suggesting a different graphics capability tier. Both processors support DDR5 memory, but the P164 also adds LPDDR5X support. The 8645HS is limited to DDR5 only. Both have dual-channel memory buses and identical memory bandwidth of 89.6 GB/s. Both support ECC memory.

The PCIe configurations are distinct. The P164 provides Gen 4 with 16 lanes (CPU only), while the 8645HS provides Gen 4 with 20 lanes (CPU only). This gives the 8645HS additional PCIe lanes for peripheral connectivity. Both use the same AMD Socket FP8. The base clocks differ significantly: the P164 has a base clock of 2.00 GHz, while the 8645HS has a base clock of 4.30 GHz. Their boost clocks are identical at 5.00 GHz. The TDP also differs, with the P164 rated at 28 watts and the 8645HS at 45 watts. The release dates in the database show the 8645HS was released in 2024, while the P164's release is dated in 2026. Neither processor has an unlocked multiplier.

Where Each One Wins

The benchmark data only provides wins for the P164, as the 8645HS has no recorded scores. The P164's performance is characterized by its 91st percentile ranking and an average score of 52901. Its nearest rivals show a performance spread of less than 1% around its score, indicating the P164 is competitive with a range of other high-end processors in the database. The Data Compression score of 327891 is a standout result, suggesting this processor is particularly strong in workloads involving data compression algorithms. The Integer Math score of 87940 and Floating Point Math score of 55799 indicate solid arithmetic processing capabilities.

For the 8645HS, the lack of benchmark scores means the database cannot establish any wins. The analysis must rely on architectural specifications. The 8645HS has a higher base clock of 4.30 GHz versus 2.00 GHz for the P164, which could indicate better performance in lightly threaded or latency-sensitive tasks where higher clock speeds matter. The larger L3 cache of 16 MB shared could benefit workloads with large working sets that fit in cache. The additional 4 PCIe lanes could support more expansion devices. The higher TDP of 45 watts suggests the 8645HS can sustain higher power draw, potentially supporting sustained performance under load, though the database does not record power efficiency data.

The P164's 8 cores and 16 threads versus the 8645HS's 6 cores and 12 threads suggests the P164 has an advantage in heavily parallel workloads. The Zen 5 / Zen 5c architecture generation is newer than Zen 4, which may bring IPC improvements, though the database does not record direct IPC measurements. The P164's support for LPDDR5X memory could enable lower-latency memory configurations in some systems. The Radeon 880M iGPU is a higher model number than the Radeon 760M, indicating potentially better integrated graphics performance, though no graphics benchmarks are recorded.

Specification Differences

The database records the following specification differences between the two processors:

The P164 has 8 cores and 16 threads, while the 8645HS has 6 cores and 12 threads. The P164's base clock is 2.00 GHz versus 4.30 GHz for the 8645HS. Their boost clocks are both 5.00 GHz. The TDP differs, with the P164 at 28 watts and the 8645HS at 45 watts. The P164 uses the Gorgon Point codename with a Zen 5 / Zen 5c generation, while the 8645HS uses Hawk Point with Zen 4 architecture. The P164 has a die size of 233 mm², and the 8645HS has a die size of 178 mm². The 8645HS has a recorded transistor count of 25,000 million, while the P164's is not listed.

The L1 cache differs: 80 KB per core for the P164 versus 64 KB per core for the 8645HS. The L2 cache is identical at 1 MB per core. The L3 cache is 8 MB for the P164 versus 16 MB shared for the 8645HS. Memory support differs, with the P164 supporting DDR5 and LPDDR5X, while the 8645HS supports only DDR5. The PCIe configuration differs: Gen 4 with 16 lanes for the P164 versus Gen 4 with 20 lanes for the 8645HS. The integrated graphics differ, with the P164 using Radeon 880M and the 8645HS using Radeon 760M. The release dates differ, with the 8645HS released in 2024 and the P164 in 2026. Both share the same socket, memory bus width, memory bandwidth, ECC support, foundry, process node, and unlocked multiplier status (both locked).

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen AI Embedded P164 has 8 cores and 16 threads, while the AMD Ryzen Embedded 8645HS has 6 cores and 12 threads.

Q: Do both processors use the same process node?

A: Yes, both are manufactured on a 4 nm process by TSMC.

Q: What is the difference in L3 cache size?

A: The P164 has 8 MB of L3 cache, while the 8645HS has 16 MB of shared L3 cache.

Q: Which processor has a higher base clock speed?

A: The AMD Ryzen Embedded 8645HS has a base clock of 4.30 GHz, which is higher than the P164's 2.00 GHz base clock. Both have the same 5.00 GHz boost clock.

Q: Is there any benchmark score recorded for the 8645HS?

A: The database records no benchmark scores for the AMD Ryzen Embedded 8645HS. Its average benchmark score is listed as 0, and it has no nearest rivals recorded.

Q: What is the P164's performance percentile?

A: The P164 is in the 91st percentile of all CPUs in the database, with an average benchmark score of 52901.

Q: Do both processors support ECC memory?

A: Yes, both the P164 and the 8645HS support ECC memory.

Q: Which processor has more PCIe lanes?

A: The 8645HS has Gen 4 with 20 lanes (CPU only), while the P164 has Gen 4 with 16 lanes (CPU only).

The Verdict

The data presents a clear asymmetry. The AMD Ryzen AI Embedded P164 has a complete benchmark profile, achieving a 91st percentile ranking with an average score of 52901 and performance within 0.7% of its nearest rivals. The AMD Ryzen Embedded 8645HS has no recorded benchmark data, making performance-based selection impossible from the database. The P164 is the only one of the two with demonstrated performance metrics.

For workloads that benefit from more cores and threads, the P164's 8-core, 16-thread configuration is the logical choice. Its support for LPDDR5X memory and the newer Zen 5 / Zen 5c architecture generation also differentiate it. The P164's lower TDP of 28 watts versus 45 watts for the 8645HS indicates a different power profile, though the database does not measure efficiency. The P164's Data Compression score of 327891 suggests particular strength in that workload.

The 8645HS offers a higher base clock of 4.30 GHz, which may be advantageous for tasks that do not scale with core count and rely on single-thread responsiveness. Its larger 16 MB shared L3 cache could benefit cache-sensitive applications. The additional 4 PCIe lanes provide more expansion potential. The 8645HS also has a recorded transistor count and a smaller die size.

Based strictly on the recorded data, the P164 is the processor with verified performance credentials. The 8645HS cannot be recommended on performance grounds because the database contains no measurements for it. The choice between them depends on whether the user prioritizes the P164's proven benchmark results and higher core count, or the 8645HS's architectural specifications such as higher base clock, larger L3 cache, and additional PCIe lanes, all without any benchmark verification. The data indicates the P164 as the safer selection for performance-critical applications, given the absence of any competing scores from the 8645HS.