AMD Ryzen AI 7 345 vs AMD Ryzen Embedded 9900X3D Comparison

FAQ

Q: How do the core and thread counts differ between these two AMD processors?

A: The AMD Ryzen AI 7 345 has 6 cores and 12 threads, while the AMD Ryzen Embedded 9900X3D has 12 cores and 24 threads. The Embedded part doubles both counts, which directly affects its multi-threaded workload capacity.

Q: What are the base and boost clock speeds for each processor?

A: The Ryzen AI 7 345 runs at a base clock of 2.00 GHz and a boost clock of 4.60 GHz. The Ryzen Embedded 9900X3D runs at a base clock of 4.40 GHz and a boost clock of 5.50 GHz, giving it a higher operating frequency range across the board.

Q: Which processor has more L3 cache and what is the difference?

A: The Ryzen Embedded 9900X3D has 128 MB of L3 cache, while the Ryzen AI 7 345 has 4 MB of L3 cache. This represents a 124 MB difference, with the Embedded part holding a massive advantage for cache-sensitive workloads.

Q: What are the TDP ratings and what does that indicate about power requirements?

A: The Ryzen AI 7 345 has a TDP of 28 watts, while the Ryzen Embedded 9900X3D has a TDP of 120 watts. The Embedded processor consumes more power, consistent with its higher core count, clock speeds, and cache size.

Q: Do both processors support ECC memory?

A: No. The Ryzen Embedded 9900X3D supports ECC memory, while the Ryzen AI 7 345 does not. This makes the Embedded part more suitable for reliability-focused applications.

Q: What sockets do these processors use, and does that affect platform compatibility?

A: The Ryzen AI 7 345 uses AMD Socket FP8, a mobile platform socket. The Ryzen Embedded 9900X3D uses AMD Socket AM5, a desktop platform socket. They are not interchangeable, meaning each requires a different motherboard type.

Architecture Differences

The two processors come from different design lineages within AMD's 4 nm process node, both fabricated by TSMC. The Ryzen AI 7 345 is based on the Krackan Point codename and belongs to the Ryzen AI 300 generation, which uses a hybrid layout of Zen 5 and Zen 5c cores. The Ryzen Embedded 9900X3D is based on the Granite Ridge codename and belongs to the Ryzen Embedded series, using Zen 5 (Granite Ridge) cores exclusively.

The Ryzen AI 7 345 is a mobile processor with 6 cores and 12 threads, a boost clock of 4.60 GHz, and a 28 W TDP. It integrates a Radeon 840M GPU and supports DDR5 and LPDDR5X memory. The Ryzen Embedded 9900X3D is a desktop processor with 12 cores and 24 threads, a boost clock of 5.50 GHz, and a 120 W TDP. It integrates a Radeon Graphics GPU and supports DDR5 memory only.

The L3 cache configuration is the defining architectural split. The Ryzen AI 7 345 has 4 MB of L3 cache, while the Ryzen Embedded 9900X3D has 128 MB of L3 cache. Both share the same per-core L1 cache of 80 KB and per-core L2 cache of 1 MB, but the Embedded part's large L3 pool provides a substantial buffer for data reuse. The Ryzen Embedded 9900X3D also reports a transistor count of 16,630 million and a die size of 2x 70.6 mm², whereas the mobile chip does not have listed figures for these fields.

PCIe support differs as well. The Ryzen AI 7 345 offers Gen 4 with 14 lanes (CPU only), while the Ryzen Embedded 9900X3D offers Gen 5 with 24 lanes (CPU only). This gives the Embedded part both a newer PCIe standard and more available lanes for expansion. The Embedded processor also has an unlocked multiplier, while the mobile chip does not, allowing overclocking on AM5 platforms.

Memory bandwidth is identical at 89.6 GB/s for both, and both use dual-channel memory buses. ECC memory support is present only on the Ryzen Embedded 9900X3D. The release dates differ: the Ryzen AI 7 345 launched on 2025-01-14, while the Ryzen Embedded 9900X3D launched on 2025-10-06. Both are marked as Active in production status.

The Verdict

The data points to two separate use cases. The Ryzen AI 7 345 is a mobile processor with 6 cores, a 28 W TDP, and a boost clock of 4.60 GHz. It fits systems where power efficiency matters and space is constrained. The Ryzen Embedded 9900X3D is a desktop processor with 12 cores, a 120 W TDP, and a boost clock of 5.50 GHz. It targets workloads that need maximum core count, cache capacity, and memory reliability.

The Ryzen Embedded 9900X3D holds the advantage in raw compute resources: twice the cores, twice the threads, higher clocks, and 128 MB of L3 cache versus 4 MB. It also supports ECC memory, which is absent on the mobile chip, and offers PCIe Gen 5 with 24 lanes versus Gen 4 with 14 lanes. The Ryzen AI 7 345 counters with a dramatically lower TDP of 28 watts versus 120 watts, making it the practical choice for battery-powered or low-heat environments.

The Ryzen Embedded 9900X3D is the pick for server-style, embedded, or desktop workloads where performance per watt is secondary to absolute throughput and cache size. The Ryzen AI 7 345 is the pick for mobile platforms where the 28 W TDP and FP8 socket align with thin-and-light or compact designs. Neither processor serves as a substitute for the other, given the socket incompatibility and distinct market segment targets.

Specification Differences

| Specification | AMD Ryzen AI 7 345 | AMD Ryzen Embedded 9900X3D |

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

| Cores | 6 | 12 |

| Threads | 12 | 24 |

| Base Clock | 2.00 GHz | 4.40 GHz |

| Boost Clock | 4.60 GHz | 5.50 GHz |

| TDP | 28 W | 120 W |

| Socket | AMD Socket FP8 | AMD Socket AM5 |

| Codename | Krackan Point | Granite Ridge |

| Generation | Ryzen AI 300 (Zen 5 / Zen 5c) | Ryzen Embedded (Zen 5) |

| Process Node | 4 nm | 4 nm |

| Foundry | TSMC | TSMC |

| Transistors | Not listed | 16,630 million |

| Die Size | Not listed | 2x 70.6 mm² |

| L3 Cache | 4 MB | 128 MB |

| Memory Support | DDR5, LPDDR5X | DDR5 |

| Memory Bus | Dual-channel | Dual-channel |

| Memory Bandwidth | 89.6 GB/s | 89.6 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 4, 14 Lanes | Gen 5, 24 Lanes |

| Integrated Graphics | Radeon 840M | Radeon Graphics |

| Market Segment | Mobile | Desktop |

| Multiplier Unlocked | No | Yes |

| Release Date | 2025-01-14 | 2025-10-06 |

Head-to-Head Benchmarks

The database contains benchmark scores for the AMD Ryzen AI 7 345, but no recorded scores for the AMD Ryzen Embedded 9900X3D. This means a direct head-to-head comparison cannot be completed from measured results. Instead, the analysis relies on the specifications and the relative performance data for the mobile chip.

The Ryzen AI 7 345 posts an average benchmark score of 29,461 across all recorded tests. Its percentile versus all CPUs stands at 81, meaning it outperforms 81 percent of processors in the database. Its nearest rivals include the AMD Ryzen 7 3800X with an average score of 29,447 and a delta of 0 percent, the AMD EPYC 9654 with an average score of 29,409 and a delta of 0.2 percent, the Intel Core i5-13500HX with an average score of 29,270 and a delta of 0.7 percent, and the AMD Ryzen 7 PRO 5755GE with an average score of 29,656 and a delta of -0.7 percent.

In specific tests, the Ryzen AI 7 345 scores 11,461 in Cinebench R23 multi-core and 1,818 in Cinebench R23 single-core. It scores 1,712 in Cinebench R15 multi-core and 271 in Cinebench R15 single-core. PassMark results show 63,475 in integer math, 42,621 in floating point math, 23,7484 in data compression, 11,814 in data encryption, 17,003 in extended instructions, 25,435 in random string sorting, and 19,927 in multithread tests. Single-thread PassMark scores are 3,875.

The Ryzen Embedded 9900X3D has an average benchmark score of 0 and a percentile of 50, with no nearest rivals listed. No benchmark scores are recorded for this processor in the database, which limits any quantitative comparison of measured performance. The specification sheet, however, indicates a processor with more cores, higher clocks, and more cache, which would typically translate to higher multi-threaded scores, but no recorded data confirms this.

Where Each One Wins

The Ryzen AI 7 345 wins in efficiency-focused scenarios. Its 28 W TDP is a fraction of the 120 W TDP on the Embedded part, making it suitable for mobile devices where thermal and power budgets are tight. It also supports LPDDR5X memory in addition to DDR5, which is a mobile-specific advantage. Its 81st percentile ranking and average score of 29,461 show it performs competitively against desktop processors like the AMD Ryzen 7 3800X and Intel Core i5-13500HX, despite its lower power envelope.

The Ryzen Embedded 9900X3D wins in compute-heavy and cache-intensive scenarios. Its 12 cores and 24 threads double the mobile chip's thread capacity. Its 128 MB of L3 cache is 32 times larger than the 4 MB on the Ryzen AI 7 345, which benefits workloads that repeatedly access large datasets. Its base clock of 4.40 GHz and boost clock of 5.50 GHz both exceed the mobile chip's 2.00 GHz and 4.60 GHz, giving it a clock-speed advantage in every operating state.

ECC memory support on the Embedded part is a clear win for error-sensitive applications such as data servers or industrial controllers. PCIe Gen 5 with 24 lanes provides more bandwidth and expansion capability than PCIe Gen 4 with 14 lanes. The unlocked multiplier offers overclocking flexibility, which the mobile chip lacks.

The Ryzen AI 7 345 wins on integration for mobile systems, with its Radeon 840M GPU and FP8 socket designed for compact motherboards. The Ryzen Embedded 9900X3D wins on raw specification dominance: core count, cache size, clock speeds, memory reliability, and platform expansion. The recorded data does not include any benchmark results for the Embedded part, so its wins are established through specification analysis rather than measured performance.