AMD Ryzen 5 PRO 5655GE vs AMD Ryzen AI 5 340 Comparison

The AMD Ryzen AI 5 340 and AMD Ryzen 5 PRO 5655GE are both six-core, twelve-thread processors, but they represent two very different generations and design philosophies from AMD. The AI 5 340 is a modern mobile-first chip built on Zen 5, while the 5655GE is a desktop-oriented part based on Zen 3. Benchmark data shows a clear split in their strengths, with the AI 5 340 winning 11 of 15 head-to-head tests, while the 5655GE takes 4 decisive victories. Their average benchmark scores are remarkably close—25981 for the AI 5 340 versus 25880 for the 5655GE—putting both at the 78th percentile among all CPUs. The data suggests that while they compete on overall performance, they excel in entirely different workloads.

Head-to-Head Benchmarks

The most striking result in the head-to-head data is the Cinebench R23 multicore test, where the Ryzen 5 PRO 5655GE beats the Ryzen AI 5 340 by a commanding 19.2% margin, scoring 15504 versus 12532. This is a major reversal from the Cinebench R15 multicore test, where the AI 5 340 wins by 22.6% with a score of 1915 versus 1562. The discrepancy between these two Cinebench versions is significant, suggesting that the older R15 test favors the AI 5 340's architecture while R23 leans heavily toward the 5655GE's higher TDP and sustained power delivery. In single-core workloads, the 5655GE also comes out ahead in Cinebench R23, posting 2188 points versus 1915.5 for the AI 5 340, a 12.5% advantage.

However, the AI 5 340 dominates in most other synthetic tests. Its Passmark single-thread score of 3683 is 13.7% higher than the 5655GE's 3240, showing a clear IPC advantage for Zen 5. The largest single delta comes in Passmark physics, where the AI 5 340 scores 1095 versus 648 for the 5655GE—a massive 69% improvement. Prime number finding also heavily favors the AI 5 340, with a 46.9% lead (72 versus 49). In floating-point math, the AI 5 340 leads by 4.6% (39967 versus 38204), and in extended instructions it also leads by 4.6% (16440 versus 15714). The AI 5 340 takes the Passmark multithread test by 8% (19506 versus 18057) and random string sorting by 5.1% (24970 versus 23769). Data compression is nearly a tie, with the AI 5 340 winning by just 0.8% (229796 versus 228037).

The 5655GE fights back in integer math, winning by 6.7% (67582 versus 63078), and in data encryption, where it takes a decisive 20.9% lead (14509 versus 11470). These two wins indicate that the older Zen 3 architecture still holds its own in specific integer-heavy and cryptographic workloads. Overall, the head-to-head picture is one of architectural specialization: the AI 5 340 dominates in physics simulation, prime number calculations, and single-threaded tasks, while the 5655GE excels in sustained all-core rendering and encryption.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen AI 5 340 has an average benchmark score of 25981, which is 0.4% higher than the Ryzen 5 PRO 5655GE's 25880. Both chips sit at the 78th percentile among all CPUs.

Q: How do they compare in Cinebench R23 multicore performance?

A: The Ryzen 5 PRO 5655GE wins decisively, scoring 15504 versus 12532 for the AI 5 340. This represents a 19.2% advantage for the 5655GE in this specific rendering workload.

Q: Which processor is better for single-threaded tasks?

A: The Ryzen AI 5 340 takes the Passmark single-thread test with a score of 3683, which is 13.7% higher than the 5655GE's 3240. However, the 5655GE wins the Cinebench R23 single-core test by 12.5%, showing the results depend on the benchmark.

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

A: The Ryzen 5 PRO 5655GE has a TDP of 65, while the Ryzen AI 5 340 has a TDP of 28. The 5655GE is rated for more than double the power envelope.

Q: Do they use the same memory type?

A: No. The Ryzen AI 5 340 supports DDR5 and LPDDR5X memory, while the Ryzen 5 PRO 5655GE supports DDR4. The AI 5 340 also has a higher memory bandwidth at 89.6 GB/s versus 51.2 GB/s.

Q: Which processor supports ECC memory?

A: Only the AMD Ryzen 5 PRO 5655GE supports ECC memory. The Ryzen AI 5 340 does not list ECC support in its specifications.

Architecture Differences

The two processors are built on fundamentally different architectures. The Ryzen AI 5 340 uses the Zen 5 architecture with the codename "Krackan Point," fabricated on a 4 nm process at TSMC. In contrast, the Ryzen 5 PRO 5655GE uses the older Zen 3 architecture with the codename "Cezanne," built on a 7 nm process, also at TSMC. The process node difference alone—4 nm versus 7 nm—explains much of the efficiency gap between the two chips.

Cache configurations differ substantially. The AI 5 340 has 80 KB of L1 cache per core, 1 MB of L2 cache per core, and 8 MB of L3 cache. The 5655GE has 64 KB of L1 per core, 512 KB of L2 per core, but doubles the L3 to 16 MB. This larger L3 cache on the older chip helps explain its strong Cinebench R23 multicore showing, as it can hold more working data closer to the cores. The die sizes are also different: the AI 5 340 measures 195 mm², while the 5655GE is slightly smaller at 180 mm². Interestingly, the 5655GE has a listed transistor count of 10,700 million, while the AI 5 340 does not provide this figure in the data.

Memory architecture is another key differentiator. The AI 5 340 supports DDR5 and LPDDR5X with dual-channel memory and a bandwidth of 89.6 GB/s. The 5655GE is limited to DDR4 with dual-channel support and a bandwidth of 51.2 GB/s. The AI 5 340 also uses PCIe Gen 4 with 16 lanes, while the 5655GE uses PCIe Gen 3 with 16 lanes. Integrated graphics differ as well: the AI 5 340 has a Radeon 840M, while the 5655GE has a Radeon Vega 7. The AI 5 340 is a mobile processor with an AMD Socket FP8, while the 5655GE is a desktop processor with an AMD Socket AM4.

The Verdict

The data points to two distinct buyers. The Ryzen AI 5 340 is the stronger all-round performer, winning 11 of 15 head-to-head tests, including massive leads in physics simulation (69%), prime number calculations (46.9%), and single-threaded Passmark performance (13.7%). Its 28 TDP makes it a far more power-efficient choice, and its modern DDR5 memory support and PCIe Gen 4 connectivity future-proof a mobile or compact system. For users who prioritize general computing, scientific simulations, or floating-point math, the AI 5 340 is the clear pick.

The Ryzen 5 PRO 5655GE, despite being older, is not obsolete. Its 19.2% win in Cinebench R23 multicore and 20.9% win in data encryption show that it remains competitive for specific workloads. The 65 TDP and 16 MB of L3 cache suggest it is designed for sustained, heavy multi-threaded rendering on the desktop. For builders with an existing AM4 platform who need strong all-core rendering performance and ECC memory support, the 5655GE is a logical choice. However, the AI 5 340's higher single-thread scores and lower power draw make it the better buy for most modern workloads.

Specification Differences

| Specification | AMD Ryzen AI 5 340 | AMD Ryzen 5 PRO 5655GE |

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

| Architecture | Zen 5 | Zen 3 |

| Codename | Krackan Point | Cezanne |

| Process Node | 4 nm | 7 nm |

| Base Clock | 2.00 GHz | 3.40 GHz |

| Boost Clock | 4.80 GHz | 4.40 GHz |

| TDP | 28 | 65 |

| Socket | AMD Socket FP8 | AMD Socket AM4 |

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

| L2 Cache | 1 MB (per core) | 512 KB (per core) |

| L3 Cache | 8 MB | 16 MB |

| Memory Support | DDR5, LPDDR5X | DDR4 |

| Memory Bandwidth | 89.6 GB/s | 51.2 GB/s |

| ECC Memory | false | true |

| PCIe | Gen 4, 16 Lanes | Gen 3, 16 Lanes |

| Integrated Graphics | Radeon 840M | Radeon Vega 7 |

| Market Segment | Mobile | Desktop |

| Release Date | 2025-01-05 | 2024-05-06 |

| Die Size | 195 mm² | 180 mm² |

| Transistors | null | 10,700 million |

Where Each One Wins

The Ryzen AI 5 340 wins in most modern and efficiency-sensitive scenarios. Its Passmark physics score of 1095 versus 648 shows a 69% advantage, making it superior for any physics-based simulation or gaming physics engine. The 46.9% lead in prime number finding (72 versus 49) indicates stronger raw integer calculation in certain algorithms. Its single-thread Passmark score of 3683 versus 3240 gives it a 13.7% edge for everyday responsiveness and lightly-threaded applications. The AI 5 340 also leads in random string sorting by 5.1%, floating-point math by 4.6%, and extended instructions by 4.6%, covering a broad spectrum of scientific and productivity workloads. Its multithread Passmark score is 8% higher, and it edges out the 5655GE in data compression by 0.8%. The lower TDP of 28 makes it the obvious choice for thin-and-light laptops or compact desktops where heat and power draw are critical constraints.

The Ryzen 5 PRO 5655GE wins where sustained all-core performance and legacy platform compatibility matter. Its Cinebench R23 multicore victory by 19.2% makes it the better option for long video rendering or 3D rendering sessions that scale across all cores. The 20.9% lead in data encryption (14509 versus 11470) gives it a clear advantage in VPN gateways, encrypted storage, or any security-focused workload. Its integer math score is 6.7% higher, which helps in database operations or compression algorithms that rely heavily on integer arithmetic. The 5655GE's 16 MB L3 cache and 65 TDP indicate it can maintain high clocks under sustained load, making it suitable for dedicated workstation builds on the AM4 platform. Its ECC memory support is a critical feature for users who need data integrity in professional or server-like environments. For those already invested in DDR4 memory and AM4 motherboards, the 5655GE offers a path to strong multi-threaded performance without a platform overhaul.