AMD Ryzen 7 7730U vs AMD Ryzen 9 6900HX Comparison

FAQ

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 9 6900HX boosts to 4.90 GHz, while the AMD Ryzen 7 7730U reaches a maximum of 4.50 GHz. The 6900HX also has a higher base clock at 3.30 GHz compared to 2000.00 MHz for the 7730U.

Q: How do their integrated graphics compare?

A: The Ryzen 9 6900HX features the Radeon 680M, while the Ryzen 7 7730U uses Radeon Graphics (Vega 8). The 680M is part of the newer Rembrandt platform with Zen 3+ architecture.

Q: Do both processors support the same memory type?

A: No. The Ryzen 9 6900HX supports DDR5 memory with a bandwidth of 76.8 GB/s, whereas the Ryzen 7 7730U supports DDR4 with a bandwidth of 51.2 GB/s. Both use dual-channel memory buses.

Q: Which CPU has more PCIe lanes?

A: The Ryzen 9 6900HX provides Gen 4 with 20 lanes (CPU only), while the Ryzen 7 7730U offers Gen 3 with 16 lanes (CPU only). The newer standard and higher lane count favor the 6900HX.

Q: Are both chips unlocked for overclocking?

A: No. The Ryzen 9 6900HX has an unlocked multiplier, while the Ryzen 7 7730U is locked. This makes the 6900HX more flexible for enthusiasts.

Q: What is the thermal design power difference?

A: The Ryzen 9 6900HX has a TDP of 45, while the Ryzen 7 7730U is rated at 15. This indicates the 6900HX is designed for higher sustained performance in larger chassis, while the 7730U targets lower-power, thinner systems.

Architecture Differences

The two processors come from different architectural generations within AMD's mobile lineup. The Ryzen 9 6900HX is built on Zen 3+ architecture with the codename Rembrandt, fabricated on a 6 nm process by TSMC with a die size of 208 mm². The Ryzen 7 7730U uses Zen 3 architecture with the codename Barcelo-R, built on a 7 nm process with a die size of 180 mm² and a transistor count of 10,700 million.

Both chips have 8 cores and 16 threads, with identical cache hierarchies: 64 KB of L1 per core, 512 KB of L2 per core, and 16 MB of shared L3. The key architectural split lies in the process node and platform support. The 6 nm Rembrandt design enables DDR5 memory and PCIe Gen 4, while the 7 nm Barcelo-R chip is limited to DDR4 and PCIe Gen 3. This means the 6900HX has significantly higher memory bandwidth (76.8 GB/s versus 51.2 GB/s) and faster I/O for storage and external devices.

The 6900HX also carries the Radeon 680M integrated graphics, which is part of the newer RDNA-based iGPU family, while the 7730U has the older Vega 8 graphics. The 6900HX uses the AMD Socket FP7, whereas the 7730U uses AMD Socket FP6, reflecting the platform generation change.

The 6900HX has an unlocked multiplier, a feature absent on the 7730U, and its TDP of 45 versus 15 indicates a much higher power envelope. The 7730U supports ECC memory, while the 6900HX does not. The 6900HX also has a higher boost clock (4.90 GHz versus 4.50 GHz) and a much higher base clock (3.30 GHz versus 2000.00 MHz).

Head-to-Head Benchmarks

The database records 17 benchmark comparisons between these two processors, and the Ryzen 9 6900HX wins all 17. The margin varies widely by workload, from modest single-thread gains to massive multi-thread and specialized task advantages.

The largest single gap appears in Geekbench multicore, where the 6900HX scores 9850 against 6565 for the 7730U, a 50% advantage. PassMark physics shows a similar pattern: 1153 versus 751, a 53.5% delta. These results indicate that the 6900HX scales much better under full core loading, likely due to its higher power budget and boost behavior.

In PassMark extended instructions, the 6900HX leads by 42.6% (20849 versus 14619), and in PassMark find prime numbers, it is 40% ahead (63 versus 45). PassMark data compression shows a 36.1% edge (306184 versus 225023), while PassMark random string sorting is 35.5% faster (32037 versus 23651). PassMark multithread also favors the 6900HX by 35% (24346 versus 18037), and PassMark data encryption is 34.1% ahead (19118 versus 14258).

Floating-point math in PassMark shows a 30% lead (49981 versus 38460), while integer math is 23.5% faster (89388 versus 72352). Cinebench R23 multicore delivers a 25% advantage (13497 versus 10801.5), and Cinebench R15 multicore is 21.9% ahead (2231 versus 1830).

Single-thread performance is closer but still favors the 6900HX. Geekbench singlecore shows a 22.1% gap (1881 versus 1541). PassMark single thread is 13.5% ahead (3409 versus 3004). Cinebench R15 singlecore is only 7.8% better (249 versus 231), and Cinebench R23 singlecore is 7.1% higher (1558 versus 1454.5).

The data shows that the 6900HX is consistently faster across every measured category, with the biggest wins in heavily threaded and memory-sensitive workloads. The smallest margins are in single-thread tests, where clock speed differences still matter but the architecture gap narrows.

The Verdict

The benchmark evidence is unambiguous: the Ryzen 9 6900HX outperforms the Ryzen 7 7730U in every recorded test. The 6900HX wins all 17 head-to-head comparisons, making it the clear choice for workloads that demand maximum throughput, such as rendering, encoding, simulation, or any multicore-heavy application.

The 7730U is not without merit. Its 15 TDP rating means it can fit into thinner, lighter laptops with smaller cooling solutions, and its DDR4 support can reduce platform cost for mainstream systems. It also offers ECC memory support, which is unusual for a mobile chip and may appeal to specialized embedded or workstation use cases.

However, for users who prioritize performance, the 6900HX delivers anywhere from 7.1% to 53.5% higher scores depending on the workload. The 50% lead in Geekbench multicore and 53.5% lead in PassMark physics highlight its superiority in parallel tasks. Even in single-thread tests, it holds a meaningful edge, ranging from 7.1% to 22.1% depending on the benchmark.

The 6900HX also brings newer platform features: DDR5 memory with 76.8 GB/s bandwidth, PCIe Gen 4 with 20 lanes, and a more capable integrated GPU. These factors compound its raw performance advantage, making it a better foundation for a premium mobile system.

The 7730U remains a viable option for battery-conscious designs or fanless-adjacent ultraportables where the 45 TDP of the 6900HX would be impractical. For any user who can accommodate the higher power draw, the 6900HX is the superior processor according to the recorded data.

Specification Differences

| Specification | AMD Ryzen 9 6900HX | AMD Ryzen 7 7730U |

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

| Series | 6000 series | 7000 series |

| Base Clock | 3.30 GHz | 2000.00 MHz |

| Boost Clock | 4.90 GHz | 4.50 GHz |

| TDP | 45 | 15 |

| Socket | AMD Socket FP7 | AMD Socket FP6 |

| Architecture | Zen 3+ | Zen 3 |

| Codename | Rembrandt | Barcelo-R |

| Process Node | 6 nm | 7 nm |

| Die Size | 208 mm² | 180 mm² |

| Transistors | Not recorded | 10,700 million |

| Memory Support | DDR5 | DDR4 |

| Memory Bandwidth | 76.8 GB/s | 51.2 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 4, 20 Lanes (CPU only) | Gen 3, 16 Lanes (CPU only) |

| Integrated Graphics | Radeon 680M | Radeon Graphics (Vega 8) |

| Multiplier Unlocked | Yes | No |

| Release Date | Not recorded | 2023-01-03T17:00:00.000Z |

| Part Number | 100-000000544100-000000560 | 100-000000942 |

Both processors share 8 cores, 16 threads, and identical per-core cache sizes (64 KB L1, 512 KB L2) plus 16 MB shared L3. They are both active mobile parts from AMD. The differences above cover the full set of recorded specification gaps between the two.