AMD Ryzen 7 7840HS vs AMD Ryzen 7 PRO 5755GE Comparison

The AMD Ryzen 7 7840HS and AMD Ryzen 7 PRO 5755GE are both 8-core, 16-thread processors with a 35W TDP, yet they are engineered for entirely different environments. The data reveals a clear split: the 7840HS dominates in raw computational throughput and specialized instruction workloads, while the 5755GE shows surprising strength in specific rendering and single-threaded tasks. Benchmark results indicate that 13 of the 15 head-to-head comparisons favor the mobile Phoenix chip, with the desktop Cezanne part taking only 2 wins. This makes the choice less about overall capability and more about which specific application profile matches the user's priorities.

Where Each One Wins

The AMD Ryzen 7 7840HS is the clear victor in the vast majority of compute-heavy scenarios. Its wins span across data compression (36.6% ahead), data encryption (21.8% ahead), floating-point math (28.6% ahead), and integer math (17.5% ahead). The largest margins appear in specialized tasks: extended instructions show a 51.2% lead, random string sorting shows a 47.5% lead, and prime number finding shows a remarkable 76% advantage. For multithreaded workloads, the 7840HS posts a 37.2% higher Passmark score, and its physics score is 63.6% higher. This pattern suggests the 7840HS is the superior choice for scientific computing, financial modeling, database operations, and any task that leverages modern instruction sets or parallel integer crunching.

The AMD Ryzen 7 PRO 5755GE wins in only two benchmarks, but they are significant. It takes the Cinebench R23 multicore test with a score of 17759 versus 15102, a 15% advantage. More surprisingly, it wins the Cinebench R23 single-core test by a massive 29.8% margin (2507 versus 1761). These specific wins point toward a strength in sustained rendering workloads and lightly-threaded applications that rely heavily on a single core's efficiency. The 5755GE also wins the older Cinebench R15 multicore test by a smaller 8.7% margin, further indicating a pattern where its architecture excels in certain rendering pipelines despite losing the Passmark multithread test.

Architecture Differences

The two processors come from different generations and use different underlying technologies. The 7840HS is part of the 7000 series, built on Zen 4 architecture with the codename "Phoenix." It is manufactured on a 4nm process node by TSMC, packing 25,000 million transistors into a 178 mm² die. In contrast, the 5755GE is from the 5000 series, using the older Zen 3 architecture with the codename "Cezanne." This chip uses a 7nm process node, also by TSMC, but contains only 10,700 million transistors on a slightly larger 180 mm² die.

Cache configurations also differ. Both have 64 KB of L1 cache per core, but the 7840HS has 1 MB of L2 cache per core, while the 5755GE has 512 KB per core. Both share 16 MB of L3 cache. Memory support is another major split: the 7840HS supports DDR5 with a dual-channel bus and a memory bandwidth of 89.6 GB/s, while the 5755GE uses DDR4 with the same dual-channel configuration but a much lower 51.2 GB/s bandwidth. The 7840HS also supports ECC memory, a feature absent on the 5755GE. PCIe capabilities differ as well, with the 7840HS offering Gen 4 with 20 lanes from the CPU, versus the 5755GE's Gen 3 with 16 lanes.

The integrated graphics differ significantly. The 7840HS features the Radeon 780M, while the 5755GE has the older Radeon Vega 8. The sockets are incompatible: the 7840HS uses AMD Socket FP8 (mobile), while the 5755GE uses the desktop AMD Socket AM4. Clock speeds favor the 7840HS, with a base clock of 3.80 GHz and boost of 5.10 GHz, compared to 3.20 GHz base and 4.60 GHz boost on the 5755GE.

Head-to-Head Benchmarks

The most dramatic single victory for the 7840HS is in the Passmark find prime numbers test, where it scores 88 against 50, a 76% delta. This test is sensitive to memory latency and integer throughput, areas where the Zen 4 architecture and faster DDR5 memory provide a clear edge. Extended instructions also show a massive gap, with the 7840HS scoring 25747 versus 17029 (51.2% higher), indicating much better support for AVX-512 or similar advanced instruction sets.

The 5755GE's wins are concentrated in Cinebench. Its R23 single-core score of 2507 versus 1761 is a 29.8% advantage, which is unexpected given the 7840HS's higher boost clock of 5.10 GHz versus 4.60 GHz. This suggests the 5755GE's Zen 3 cores, running at a lower clock but perhaps with better sustained boost behavior or lower thermal throttling, are more efficient in this particular benchmark. The R23 multicore result follows suit, with 17759 versus 15102 (15% higher).

In the Passmark suite, the 7840HS wins every contest. Data compression shows 345536 versus 252937 (36.6% higher), while data encryption shows 20627 versus 16937 (21.8% higher). Floating-point math is 28.6% higher, and integer math is 17.5% higher. The multithread test shows a 37.2% gap (28633 versus 20870), and physics simulation shows a 63.6% gap. Single-thread Passmark scores are closer, with 3753 versus 3353, an 11.9% advantage for the 7840HS.

FAQ

Q: Which processor is faster in Cinebench R23 multicore?

A: The AMD Ryzen 7 PRO 5755GE wins with a score of 17759, beating the 7840HS's 15102 by 15%.

Q: Does the 7840HS support ECC memory?

A: Yes, ECC memory support is listed as true for the 7840HS, while the 5755GE does not support ECC memory.

Q: What is the memory bandwidth difference?

A: The 7840HS supports DDR5 with a bandwidth of 89.6 GB/s, while the 5755GE supports DDR4 with a bandwidth of 51.2 GB/s.

Q: Which chip has more L2 cache per core?

A: The 7840HS has 1 MB of L2 cache per core, double the 512 KB per core on the 5755GE.

Q: How do the single-core Cinebench R23 scores compare?

A: The 5755GE leads significantly, scoring 2507 versus 1761 for the 7840HS, a 29.8% advantage.

Q: Which processor has the higher boost clock?

A: The 7840HS has a boost clock of 5.10 GHz, compared to 4.60 GHz for the 5755GE.

The Verdict

The data strongly favors the AMD Ryzen 7 7840HS for users who prioritize throughput in a wide range of computational tasks. Its 13 benchmark wins cover encryption, compression, math operations, and physics, making it the superior choice for software development, data analysis, and content creation that uses modern instruction sets. The 76% lead in prime number finding and 51.2% lead in extended instructions are particularly compelling for scientific and engineering workloads. The 7840HS also offers modern platform features like DDR5, ECC support, and PCIe Gen 4, along with a more capable Radeon 780M integrated GPU.

The AMD Ryzen 7 PRO 5755GE is the pick only for a very specific niche. Its two wins in Cinebench R23 indicate that it may be better suited for professional rendering pipelines that are heavily optimized for that benchmark's specific workload. The 29.8% single-core advantage suggests it could also excel in legacy or lightly-threaded applications where raw single-thread performance in rendering contexts is paramount. However, its older DDR4 memory, lack of ECC, and lower Passmark scores across the board make it a difficult recommendation for general-purpose computing. The 7840HS is the more versatile and faster processor for nearly all tasks, with the 5755GE being a specialized alternative for rendering-focused users.

Specification Differences

| Specification | AMD Ryzen 7 7840HS | AMD Ryzen 7 PRO 5755GE |

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

| Series | 7000 series | 5000 series |

| Base Clock | 3.80 GHz | 3.20 GHz |

| Boost Clock | 5.10 GHz | 4.60 GHz |

| Socket | AMD Socket FP8 | AMD Socket AM4 |

| Architecture | Zen 4 | Zen 3 |

| Codename | Phoenix | Cezanne |

| Process Node | 4 nm | 7 nm |

| Transistors | 25,000 million | 10,700 million |

| Die Size | 178 mm² | 180 mm² |

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

| Memory Support | DDR5 | DDR4 |

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

| ECC Memory | Yes | No |

| PCIe | Gen 4, 20 Lanes | Gen 3, 16 Lanes |

| Integrated Graphics | Radeon 780M | Radeon Vega 8 |

| Market Segment | Mobile | Desktop |

| Release Date | Not specified | 2024-09-04 |