AMD Ryzen 7 5825U vs AMD Ryzen 7 7735HS Comparison

The AMD Ryzen 7 5825U and AMD Ryzen 7 7735HS are both 8-core, 16-thread mobile processors, but they occupy different tiers within AMD's lineup. The 5825U is a 15W part from the 5000 series, while the 7735HS is a 35W part from the 7000 series. Head-to-head benchmark data shows a decisive winner: the 7735HS wins all 17 shared tests. This analysis breaks down the performance differences, architecture changes, and the implications for system design.

Where Each One Wins

The recorded head-to-head benchmarks give the Ryzen 7 7735HS a clean sweep. It wins every one of the 17 tests that both CPUs share, so there is no workload category in which the 5825U comes out ahead. The margins, however, are not uniform. The largest gaps appear in multi-threaded and specialized workloads. For example, the 7735HS leads by 28.2% in Passmark extended instructions, by 27.9% in Passmark physics, and by 24.3% in Passmark data compression. These are tasks that scale well with core count, memory bandwidth, and instruction-level efficiency.

The smallest deltas are in single-threaded tests. The 7735HS leads by 4.8% in Geekbench single-core, by 6.1% in Cinebench R23 single-core, and by 6.5% in Cinebench R15 single-core. This suggests that the 5825U is relatively closer to the 7735HS when only one or two cores are active, though it still trails. The 5825U's lower TDP (15W vs 35W) indicates it is designed for power-constrained environments, but the data shows that this power advantage does not translate into any performance win. In every measured test, the 7735HS is faster.

Architecture Differences

The two CPUs share a similar core configuration: both have 8 cores, 16 threads, 64 KB of L1 cache per core, 512 KB of L2 cache per core, and 16 MB of shared L3 cache. They also both support ECC memory. Beyond that, the architectures diverge significantly.

The 5825U is built on Zen 3, using a 7 nm process from TSMC, with a die size of 180 mm² and 10,700 million transistors. Its codename is Barcelo, and it uses the AMD Socket FP6. The 7735HS uses Zen 3+ architecture, fabricated on a 6 nm process, with a die size of 210 mm². Its codename is Rembrandt-R, and it uses the AMD Socket FP7. The 7735HS does not have a listed transistor count in the database.

Clock speeds differ as well. The 5825U has a base clock of 2.00 GHz and a boost clock of 4.50 GHz. The 7735HS runs at a base of 3.20 GHz and boosts to 4.75 GHz. The TDP is 15W for the 5825U and 35W for the 7735HS, which explains the higher clocks on the latter.

Memory support is another major split. The 5825U supports DDR4 memory with a dual-channel bus and a bandwidth of 51.2 GB/s. The 7735HS supports DDR5, also dual-channel, but with a bandwidth of 76.8 GB/s. The PCIe interface also differs: the 5825U provides 16 lanes of PCIe Gen 3, while the 7735HS offers 20 lanes of PCIe Gen 4.

The integrated graphics are different as well. The 5825U includes a Radeon Vega 8 iGPU, while the 7735HS has a Radeon 680M. The 7735HS was released on 2023-03-31, while the 5825U came out on 2022-01-05. Both are listed as active production parts for the mobile segment.

Head-to-Head Benchmarks

The head-to-head results are unambiguous. The 7735HS wins every test, but the magnitude of the win varies. The largest advantage is in Passmark extended instructions, where the 7735HS scores 20050 against the 5825U's 14394, a 28.2% lead. Passmark physics shows a 27.9% gap (1073 vs 774). Passmark data compression is 24.3% higher (293278 vs 221938). Passmark data encryption is 22.8% higher (18237 vs 14088). Cinebench R23 multicore is 22.5% higher (13106 vs 10152), and Passmark random string sorting is also 22.5% higher (30388 vs 23539). Passmark multithread is 21.7% higher (23166 vs 18131). Passmark floating point math is 19.6% higher (47865 vs 38482). Passmark find prime numbers is 18.6% higher (59 vs 48). Cinebench R15 multicore is 18.4% higher (2153.4 vs 1757). Passmark integer math is 14.9% higher (85309 vs 72577).

The single-threaded tests show a much narrower gap. Geekbench single-core is 4.8% higher (1699 vs 1618). Cinebench R23 single-core is 6.1% higher (1546 vs 1452). Cinebench R15 single-core is 6.5% higher (248 vs 232). Passmark single-thread is 7.4% higher (3296 vs 3053). These results indicate that the 7735HS's advantage grows with thread count and instruction complexity, while the 5825U remains competitive in lightly threaded scenarios.

It is notably the 5825U has a higher average benchmark score (25446) than the 7735HS (25147), and it sits in the 78th percentile of all CPUs, compared to the 77th percentile for the 7735HS. This is because the average score includes tests that are not shared between the two. In the direct comparison, however, the 7735HS is the clear winner.

The Verdict

The data is clear: the Ryzen 7 7735HS is the faster processor in every shared benchmark. It leads by double digits in most multi-threaded and specialized workloads, and even in single-threaded tests it maintains a consistent, if smaller, advantage. For any performance-sensitive application, the 7735HS is the superior choice.

The 5825U does have its own strengths, but they are not performance-related. Its 15W TDP makes it suitable for low-power designs, and its support for DDR4 memory may be relevant for systems that rely on that memory standard. The 7735HS, by contrast, offers DDR5, higher memory bandwidth, PCIe Gen 4, and a newer 6 nm process. The 5825U's higher average benchmark score and percentile ranking are artifacts of its broader benchmark set, not evidence of superiority in direct comparison.

For system builders who prioritize raw performance, the 7735HS is the obvious pick. For those who need a lower-power part or DDR4 compatibility, the 5825U remains a viable option, but it will not match the 7735HS in any measured workload.

FAQ

Q: Which CPU has a higher boost clock?

A: The Ryzen 7 7735HS has a boost clock of 4.75 GHz, while the Ryzen 7 5825U boosts to 4.50 GHz.

Q: Do both CPUs have the same L3 cache?

A: Yes, both have 16 MB of shared L3 cache, along with 64 KB of L1 and 512 KB of L2 per core.

Q: Which CPU supports DDR5 memory?

A: The Ryzen 7 7735HS supports DDR5, while the Ryzen 7 5825U supports DDR4. The 7735HS also has a higher memory bandwidth at 76.8 GB/s versus 51.2 GB/s.

Q: What is the TDP difference between the two?

A: The 5825U has a TDP of 15W, while the 7735HS has a TDP of 35W.

Q: Which CPU has more PCIe lanes?

A: The 7735HS provides 20 lanes of PCIe Gen 4, while the 5825U has 16 lanes of PCIe Gen 3.

Q: How much faster is the 7735HS in Geekbench single-core?

A: The 7735HS scores 1699, while the 5825U scores 1618, a 4.8% difference.