AMD Ryzen AI Embedded P174 vs AMD Ryzen Embedded 9900X Comparison

Head-to-Head Benchmarks

The recorded database contains no direct benchmark scores for either the AMD Ryzen AI Embedded P174 or the AMD Ryzen Embedded 9900X. Both processors hold a 50th percentile position against all CPUs in the database, and both carry an average benchmark score of zero. With no measured results available, the comparison must rest entirely on architectural and specification differences.

The Ryzen Embedded 9900X holds a clear advantage in raw core count. It delivers 12 cores and 24 threads against the P174's 10 cores and 20 threads. That difference translates directly into multi-threaded workload capacity. The 9900X also operates at a substantially higher base clock of 4.40 GHz versus 2.00 GHz on the P174. Boost clocks favor the 9900X as well, with 5.60 GHz against 5.00 GHz. For sustained all-core workloads, the 9900X should pull ahead by a wide margin, though no measured data confirms this.

Single-thread performance also appears to favor the 9900X. Its higher base and boost clocks suggest stronger per-core execution. The P174's lower clock speeds are likely a consequence of its 28 watt TDP target, which limits how much power each core can draw. The 9900X, with a 120 watt TDP, has far more thermal headroom to maintain high frequencies under load.

Cache capacity is another area where the 9900X dominates. It offers 64 MB of L3 cache, quadruple the P174's 16 MB. L1 and L2 caches are identical per core at 80 KB and 1 MB respectively, but the larger L3 pool on the 9900X benefits workloads that repeatedly access shared data across cores. The P174's smaller L3 could become a bottleneck in database workloads, virtualized environments, or large compilation tasks where working sets exceed 16 MB.

Memory support differs in one meaningful way. Both chips support DDR5 and run on a dual-channel bus with an identical 89.6 GB/s memory bandwidth. The P174 additionally supports LPDDR5X, which opens low-power mobile and embedded designs that rely on soldered memory. Both support ECC memory, a critical feature for embedded and server-adjacent deployments where data integrity matters.

PCIe connectivity strongly favors the 9900X. It provides Gen 5 with 24 lanes from the CPU, while the P174 provides Gen 4 with only 16 lanes. The 9900X's PCIe Gen 5 support doubles the per-lane bandwidth compared to Gen 4, and the extra eight lanes allow more expansion devices. For embedded systems that need fast NVMe storage, high-bandwidth network cards, or multiple accelerators, the 9900X is the better fit. The P174's Gen 4 lane count limits it to more modest configurations.

The integrated graphics differ as well. The P174 uses a Radeon 880M, while the 9900X uses a generic Radeon Graphics solution. No benchmark data exists for either, so relative graphics performance cannot be quantified. The P174's Radeon 880M is likely the stronger iGPU given its explicit naming and embedded focus, but the database provides no scores to confirm this.

The physical package and platform requirements separate these two processors completely. The P174 uses AMD Socket FP8, a mobile-oriented socket, while the 9900X uses AMD Socket AM5, a desktop and embedded standard. The 9900X's die configuration is dual-chiplet, with two 70.6 mm² dies totaling a 16,630 million transistor count. The P174 uses a single 233 mm² die with no transistor count listed. Both are manufactured on TSMC's 4 nm process, so the transistor density gap reflects the different die layouts.

The Verdict

The data points to two distinct deployment profiles. The AMD Ryzen Embedded 9900X is the stronger processor for compute-heavy embedded workloads. Its 12 cores, 24 threads, 4.40 GHz base clock, 5.60 GHz boost clock, 64 MB L3 cache, and PCIe Gen 5 with 24 lanes make it the obvious choice for server appliances, edge compute nodes, and any system that prioritizes raw throughput. The 120 watt TDP is high, but it buys substantial performance headroom.

The AMD Ryzen AI Embedded P174 targets a different niche. Its 28 watt TDP makes it suitable for passively cooled or fanless embedded systems where power consumption and heat dissipation are primary constraints. The 10 cores and 20 threads still provide respectable multi-threading, and the 5.00 GHz boost clock ensures decent single-thread responsiveness. LPDDR5X support adds flexibility for compact designs with soldered memory. The Radeon 880M iGPU, while unbenchmarked, suggests stronger integrated graphics capability than the 9900X's generic Radeon Graphics.

Neither processor has recorded benchmark results, so the verdict rests on specification analysis. The 9900X wins on every performance-relevant metric: cores, threads, clocks, cache, and PCIe bandwidth. The P174 wins on power efficiency and platform flexibility. Users who need maximum compute per watt should consider the P174. Users who need maximum compute regardless of power draw should choose the 9900X.

Architecture Differences

The two processors share a Zen 5 foundation but implement it differently. The P174 uses the Gorgon Point codename and is classified under the Ryzen AI Embedded generation with Zen 5 / Zen 5c cores. This hybrid core arrangement suggests a mix of full-performance Zen 5 cores and compact Zen 5c cores, which would explain the 10-core count at a 28 watt TDP. The 233 mm² monolithic die houses all components on a single piece of silicon.

The 9900X uses the Granite Ridge codename and belongs to the Ryzen Embedded generation with Zen 5 (Granite Ridge) cores. Its dual-chiplet design uses two 70.6 mm² dies, totaling 141.2 mm² of active silicon. The 16,630 million transistor count reflects this chiplet architecture. The smaller individual dies improve manufacturing yields and allow the higher 120 watt TDP to be spread across two chiplets.

Both chips use TSMC's 4 nm process, so the architectural differences come down to layout and core design rather than manufacturing node. The P174's larger single die suggests a more integrated approach, possibly with the Radeon 880M and memory controller sharing the same silicon. The 9900X's dual-die approach separates compute chiplets from the I/O die, a common design for high-core-count desktop and embedded parts.

The P174's hybrid Zen 5 / Zen 5c core arrangement is the most significant architectural divergence. Zen 5c cores typically trade clock speed for density and efficiency, which aligns with the P174's lower 2.00 GHz base clock. The 9900X uses uniform Zen 5 cores across both chiplets, allowing all 12 cores to hit the higher 4.40 GHz base and 5.60 GHz boost clocks.

Specification Differences

| Specification | Ryzen AI Embedded P174 | Ryzen Embedded 9900X |

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

| Cores | 10 | 12 |

| Threads | 20 | 24 |

| Base Clock | 2.00 GHz | 4.40 GHz |

| Boost Clock | 5.00 GHz | 5.60 GHz |

| TDP | 28 W | 120 W |

| Socket | AMD Socket FP8 | AMD Socket AM5 |

| Codename | Gorgon Point | Granite Ridge |

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

| Die Size | 233 mm² | 2x 70.6 mm² |

| Transistors | Not listed | 16,630 million |

| L3 Cache | 16 MB | 64 MB |

| Memory Support | DDR5, LPDDR5X | DDR5 |

| PCIe | Gen 4, 16 lanes | Gen 5, 24 lanes |

| Integrated Graphics | Radeon 880M | Radeon Graphics |

| Market Segment | Mobile | Desktop |

| Multiplier Unlocked | No | Yes |

| Release Date | 2026-02-28 | 2025-10-06 |

| Part Number | Unknown | 100-000000662E |

Both processors support ECC memory, dual-channel memory buses, and offer 89.6 GB/s memory bandwidth. Both use 80 KB L1 cache and 1 MB L2 cache per core. The 9900X's unlocked multiplier allows overclocking, while the P174's multiplier is locked. The 9900X released earlier, on 2025-10-06, while the P174 arrived on 2026-02-28.

FAQ

Q: Which processor has more cores?

A: The Ryzen Embedded 9900X has 12 cores and 24 threads. The Ryzen AI Embedded P174 has 10 cores and 20 threads.

Q: What is the TDP difference between these two chips?

A: The P174 has a 28 watt TDP. The 9900X has a 120 watt TDP, more than four times higher.

Q: Do both processors support ECC memory?

A: Yes, both the P174 and the 9900X support ECC memory. Both also run dual-channel memory at 89.6 GB/s bandwidth.

Q: Which processor supports PCIe Gen 5?

A: Only the Ryzen Embedded 9900X supports PCIe Gen 5, with 24 lanes. The P174 is limited to PCIe Gen 4 with 16 lanes.

Q: Do these processors use the same manufacturing process?

A: Yes, both are built on TSMC's 4 nm process. The P174 uses a single 233 mm² die, while the 9900X uses two 70.6 mm² dies.

Q: Which chip supports LPDDR5X memory?

A: The Ryzen AI Embedded P174 supports both DDR5 and LPDDR5X. The Ryzen Embedded 9900X supports only DDR5.

Where Each One Wins

The Ryzen Embedded 9900X wins in every performance-oriented category. Its 12 cores and 24 threads outperform the P174's 10 cores and 20 threads in multi-threaded workloads. The 4.40 GHz base clock and 5.60 GHz boost clock exceed the P174's 2.00 GHz base and 5.00 GHz boost, giving it the edge in both sustained and burst workloads. The 64 MB L3 cache quadruples the P174's 16 MB, reducing memory latency for large working sets. PCIe Gen 5 with 24 lanes supports faster storage and more expansion devices than the P174's Gen 4 with 16 lanes.

The 9900X also wins on platform flexibility. Its AM5 socket is a standard desktop and embedded form factor with broad motherboard availability. The unlocked multiplier permits overclocking, a feature absent on the P174. The earlier release date of 2025-10-06 means the platform has had more time to mature in the ecosystem.

The Ryzen AI Embedded P174 wins on power efficiency. Its 28 watt TDP is a fraction of the 9900X's 120 watt TDP, making it suitable for systems with strict thermal and power budgets. The FP8 socket is designed for mobile and compact embedded deployments. LPDDR5X support enables soldered memory configurations that save board space and reduce power consumption. The Radeon 880M integrated graphics, while unbenchmarked, carries a specific product name that suggests stronger graphics capability than the 9900X's generic Radeon Graphics.

For AI-oriented embedded workloads, the P174's Ryzen AI Embedded branding and Zen 5 / Zen 5c hybrid core layout indicate a design focus on integrated intelligence and efficiency. The 9900X's Granite Ridge architecture prioritizes brute compute density. Systems requiring maximum throughput per watt, compact form factors, or low acoustic profiles should favor the P174. Systems requiring maximum raw compute, fast I/O, and large cache should favor the 9900X. The specification data makes this division clear, even without benchmark scores to confirm it.