AMD Ryzen 5 7545U vs AMD Ryzen 9 6900HX Comparison

FAQ

Q: Which CPU has the higher average benchmark score?

A: The AMD Ryzen 5 7545U has an average benchmark score of 26849, while the AMD Ryzen 9 6900HX sits at 26274. The 7545U is slightly ahead, but the difference is modest.

Q: How do these CPUs compare to their nearest rivals?

A: The Ryzen 5 7545U sits within 0.4% of the AMD Ryzen 5 5500GT and AMD EPYC 9554, and within 0.3% of the Intel Core i7-1370P and AMD Ryzen AI 7 445. The Ryzen 9 6900HX is within 0.5% of the AMD Ryzen 7 7435HS, AMD Ryzen 5 7600, Intel Core i9-11900KF, and AMD Ryzen 5 8540U.

Q: Which CPU has the higher single-thread performance in Cinebench R23?

A: The Ryzen 5 7545U wins decisively with a score of 2435 versus 1558 for the Ryzen 9 6900HX, a 56.3% advantage.

Q: Which CPU wins in multi-threaded Cinebench R15?

A: The Ryzen 9 6900HX takes Cinebench R15 multicore with 2231 points versus 1739 for the Ryzen 5 7545U, a 22.1% lead.

Q: Do both CPUs support DDR5 memory?

A: Yes, both support DDR5 with dual-channel memory buses. The Ryzen 5 7545U has a higher memory bandwidth rating at 89.6 GB/s compared to 76.8 GB/s for the Ryzen 9 6900HX.

Q: Which CPU has the better integrated graphics?

A: The Ryzen 9 6900HX features the Radeon 680M, while the Ryzen 5 7545U comes with the Radeon 740M. The database records no direct graphics benchmarks, but the model names differ.

Architecture Differences

The Ryzen 5 7545U is built on the Zen 4 architecture with the Phoenix2 codename, fabricated on a 4 nm process at TSMC. The Ryzen 9 6900HX uses Zen 3+ with the Rembrandt codename, on a 6 nm process also at TSMC. This process gap is significant: the 7545U packs 20,900 million transistors into a 137 mm² die, while the 6900HX uses a larger 208 mm² die with no transistor count recorded in the database.

Cache layouts differ in L2. The 7545U provides 1 MB of L2 per core, while the 6900HX offers 512 KB per core. Both share 16 MB of L3 and use 64 KB of L1 per core. The smaller L2 on the 6900HX is offset by its extra cores.

The 7545U has a 28 W TDP, while the 6900HX has a 45 W TDP. Both run on AMD Socket FP7. The 6900HX has an unlocked multiplier, whereas the 7545U does not. The 6900HX is in the 6000 series with Rembrandt branding, and the 7545U is in the 7000 series with Phoenix2 branding.

Memory bandwidth favors the 7545U at 89.6 GB/s versus 76.8 GB/s for the 6900HX. ECC memory support is present on the 7545U but absent on the 6900HX. The 6900HX offers more PCIe lanes at Gen 4, 20 lanes versus Gen 4, 14 lanes on the 7545U. The 7545U has a recorded release date of November 1, 2023, while the 6900HX has no release date in the database.

Where Each One Wins

The Ryzen 5 7545U is the single-thread champion. It wins Cinebench R23 singlecore by 56.3%, PassMark single thread by 7.7%, and PassMark find prime numbers by 7.9%. The newer Zen 4 architecture and smaller process node deliver a clear IPC advantage. This makes it the better choice for lightly threaded workloads, responsive everyday use, and applications that rely on a few fast cores.

The Ryzen 9 6900HX dominates multi-threaded and throughput-heavy tasks. It wins 10 of the 15 head-to-head benchmark comparisons, including PassMark integer math by 32.6%, floating point math by 26.5%, data encryption by 25.7%, data compression by 22.2%, and Cinebench R15 multicore by 22.1%. Its 8 cores and 16 threads provide the raw parallel throughput that the 6-core, 12-thread 7545U cannot match. The 6900HX also wins PassMark multithread by 16.6%, extended instructions by 14.3%, physics by 8.3%, and random string sorting by 5.2%.

The split is clean: the 7545U wins where single-thread speed matters, and the 6900HX wins where core count and parallel execution matter. The 7545U also wins Cinebench R23 multicore by 27.8%, which is surprising given the 6900HX has more cores. This suggests that in certain modern multi-threaded workloads, the Zen 4 architecture compensates for the core deficit.

Specification Differences

| Specification | AMD Ryzen 5 7545U | AMD Ryzen 9 6900HX |

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

| Series | 7000 series | 6000 series |

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base clock | 3.20 GHz | 3.30 GHz |

| Boost clock | 4.90 GHz | 4.90 GHz |

| TDP | 28 W | 45 W |

| Architecture | Zen 4 | Zen 3+ |

| Codename | Phoenix2 | Rembrandt |

| Process node | 4 nm | 6 nm |

| Transistors | 20,900 million | Not recorded |

| Die size | 137 mm² | 208 mm² |

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

| Memory bandwidth | 89.6 GB/s | 76.8 GB/s |

| ECC memory | Yes | No |

| PCIe | Gen 4, 14 Lanes (CPU only) | Gen 4, 20 Lanes (CPU only) |

| Integrated graphics | Radeon 740M | Radeon 680M |

| Unlocked multiplier | No | Yes |

| Release date | 2023-11-01 | Not recorded |

Both CPUs share the same socket, L1 cache size, L3 cache size, DDR5 memory support, dual-channel memory bus, and boost clock of 4.90 GHz. The 7545U has a higher base clock? No, the 6900HX has a 3.30 GHz base versus 3.20 GHz. The 7545U compensates with a much smaller die and lower TDP.

Head-to-Head Benchmarks

The Cinebench results tell two different stories. In Cinebench R15 multicore, the 6900HX wins 2231 to 1739, a 22.1% margin. But in Cinebench R23 multicore, the 7545U flips the result, winning 17253 to 13497, a 27.8% lead. The R23 test is more modern and appears to favor the Zen 4 architecture. The single-core results are even more lopsided: the 7545U scores 2435 in Cinebench R23 singlecore versus 1558 for the 6900HX, a 56.3% advantage. In Cinebench R15 singlecore, the gap nearly vanishes, with the 6900HX edging ahead 249 to 245, just 1.6%.

PassMark paints a consistent picture of 6900HX dominance in compute-heavy workloads. Integer math goes to the 6900HX by 32.6% (89388 to 60206). Floating point math goes to the 6900HX by 26.5% (49981 to 36754). Data encryption favors the 6900HX by 25.7% (19118 to 14202). Data compression goes to the 6900HX by 22.2% (306184 to 238345). Extended instructions favor the 6900HX by 14.3% (20849 to 17865). PassMark multithread goes to the 6900HX by 16.6% (24346 to 20298). Physics goes to the 6900HX by 8.3% (1153 to 1057). Random string sorting goes to the 6900HX by 5.2% (32037 to 30358).

The 7545U wins the remaining PassMark tests. Single thread goes to the 7545U by 7.7% (3673 to 3409). Find prime numbers goes to the 7545U by 7.9% (68 to 63). The 7545U also holds a 5-4 edge in overall head-to-head wins? No, the 6900HX wins 10 of the 15 head-to-head benchmarks, with the 7545U taking 5.

The 6900HX has additional 3DMark results not shared with the 7545U: 16 threads at 6745, 2 threads at 1767, 4 threads at 3353, 8 threads at 5607, max threads at 6717, and single thread at 912. The 7545U has Cinebench R20 results not shared with the 6900HX: multicore at 7246 and singlecore at 1022. The 6900HX also has Geekbench results: multicore at 9850 and singlecore at 1881.

The Verdict

The data supports two distinct buyer profiles. The Ryzen 5 7545U is the pick for single-thread performance and efficiency. It wins Cinebench R23 singlecore by 56.3%, PassMark single thread by 7.7%, and delivers the same 4.90 GHz boost clock as the 6900HX while drawing only 28 W versus 45 W. Its 4 nm process, 137 mm² die, and 20,900 million transistors point to a modern, dense design. The 7545U also wins Cinebench R23 multicore by 27.8%, proving that architectural efficiency can overcome a core deficit in some workloads. Users who prioritize snappy response, light coding, and battery-conscious mobile use should lean toward the 7545U.

The Ryzen 9 6900HX is the pick for parallel throughput. Its 8 cores and 16 threads dominate the PassMark suite, winning integer math by 32.6%, floating point math by 26.5%, data encryption by 25.7%, data compression by 22.2%, and PassMark multithread by 16.6%. It also wins Cinebench R15 multicore by 22.1%. The 6900HX has an unlocked multiplier, 20 PCIe Gen 4 lanes, and the Radeon 680M integrated graphics. Users who run heavy parallel workloads, content creation, or number-crunching tasks should pick the 6900HX.

The overall benchmark averages are close: 26849 for the 7545U versus 26274 for the 6900HX, a difference of about 2.2%. Both CPUs sit near the 78th to 79th percentile of all CPUs recorded in the database. The 7545U edges out the 6900HX in average score, but the 6900HX wins more individual tests. The choice comes down to workload: single-threaded speed and efficiency from the 7545U, raw multi-threaded horsepower from the 6900HX.