AMD Ryzen 5 7640U vs AMD Ryzen 7 7735HS Comparison

Head-to-Head Benchmarks

The head-to-head results show a clear split: the AMD Ryzen 5 7640U dominates in single-threaded and modern multi-threaded workloads, while the AMD Ryzen 7 7735HS takes the lead in legacy multi-threaded and specialized integer tasks. Out of 17 recorded comparisons, the Ryzen 5 7640U wins 9, the Ryzen 7 7735HS wins 8, making this a near-even contest with distinct strengths.

The most decisive victory belongs to the Ryzen 5 7640U in Cinebench R23 single-core, where it scores 2532 against 1546, a massive 63.8% advantage. This is not a marginal difference; it reflects fundamentally different per-core capabilities. The same pattern appears in Cinebench R23 multi-core, where the Ryzen 5 7640U scores 17936 versus 13106, a 36.9% lead despite having 2 fewer cores. Geekbench single-core also favors the Ryzen 5 7640U by 25.2% (2127 vs 1699), and Geekbench multi-core by 5.9% (8595 vs 8114). These results indicate the Ryzen 5 7640U's Zen 4 architecture delivers substantially higher instructions per clock than the Ryzen 7 7735HS's Zen 3+ design.

The Ryzen 7 7735HS answers in Cinebench R15, where its 8 cores and 16 threads produce a score of 2153.4 against 1807, a 16.1% win. PassMark tests further favor the Ryzen 7 7735HS: data compression (293278 vs 240032, 18.2% ahead), data encryption (18237 vs 14954, 18% ahead), extended instructions (20050 vs 17019, 15.1% ahead), floating point math (47865 vs 41093, 14.1% ahead), integer math (85309 vs 70483, 17.4% ahead), multithread (23166 vs 21115, 8.9% ahead), and random string sorting (30388 vs 29382, 3.3% ahead).

The Ryzen 5 7640U also wins passmark_find_prime_numbers (74 vs 59, 25.4% ahead), passmark_physics (1169 vs 1073, 8.9% ahead), and passmark_single_thread (3524 vs 3296, 6.9% ahead). The single-thread PassMark result aligns with the Cinebench and Geekbench single-core outcomes, reinforcing that the Ryzen 5 7640U has superior per-thread performance across multiple benchmark suites.

Architecture Differences

The two processors come from different architecture generations. The AMD Ryzen 5 7640U uses Zen 4 architecture, codenamed Phoenix, built on TSMC's 4 nm process node. The AMD Ryzen 7 7735HS uses Zen 3+ architecture, codenamed Rembrandt-R, built on TSMC's 6 nm process node. This process difference explains much of the performance gap: the 4 nm node allows higher clock speeds at lower power, and the Zen 4 microarchitecture itself delivers better instruction-level parallelism.

Core counts differ, with the Ryzen 5 7640U offering 6 cores and 12 threads, while the Ryzen 7 7735HS offers 8 cores and 16 threads. Despite the Ryzen 7 having 33% more cores, the Ryzen 5 wins in several multi-threaded benchmarks, which shows that Zen 4's per-core efficiency outweighs the raw core count advantage in many workloads.

Clock speeds also favor the Ryzen 5 7640U: base clock 3.50 GHz versus 3.20 GHz, boost clock 4.90 GHz versus 4.75 GHz. The Ryzen 5 7640U has a TDP of 15 watts, while the Ryzen 7 7735HS has a TDP of 35 watts. This power envelope difference is significant: the Ryzen 5 achieves higher performance in many tests while consuming less than half the thermal design power.

Cache configurations differ in L2 cache: the Ryzen 5 7640U has 1 MB per core, while the Ryzen 7 7735HS has 512 KB per core. Both share 16 MB of L3 cache and 64 KB of L1 per core. The larger L2 cache on the Ryzen 5 likely contributes to its single-threaded lead.

Memory bandwidth also differs: the Ryzen 5 7640U supports 89.6 GB/s, while the Ryzen 7 7735HS supports 76.8 GB/s, both using dual-channel DDR5. Both support ECC memory and PCIe Gen 4 with 20 lanes. The integrated graphics differ as well: Radeon 760M on the Ryzen 5 7640U versus Radeon 680M on the Ryzen 7 7735HS.

Socket types differ: the Ryzen 5 7640U uses AMD Socket FP8, while the Ryzen 7 7735HS uses AMD Socket FP7. Both are mobile market segments, both are active production, and neither has an unlocked multiplier.

The Verdict

The data points to a clear recommendation based on workload. For single-threaded performance, the AMD Ryzen 5 7640U is the definitive choice. Its 63.8% lead in Cinebench R23 single-core and 25.2% lead in Geekbench single-core are decisive. Any application that relies heavily on per-core speed, such as web browsing, office productivity, or lightly threaded creative tools, will benefit from the Ryzen 5 7640U.

For legacy multi-threaded benchmarks and specialized workloads, the AMD Ryzen 7 7735HS holds advantages. Its wins in Cinebench R15 multi-core (16.1%), PassMark data compression (18.2%), and integer math (17.4%) show that its 8-core, 16-thread configuration is well-suited for tasks that scale with core count and benefit from the older architecture's characteristics.

However, the Ryzen 5 7640U wins the more modern multi-threaded tests, including Cinebench R23 multi-core by 36.9% and Geekbench multi-core by 5.9%. This suggests that as software optimizes for newer architectures, the Ryzen 5 7640U will likely extend its lead. The 15-watt TDP versus 35-watt TDP also makes the Ryzen 5 7640U the more efficient choice for thin-and-light laptops, while the Ryzen 7 7735HS may be better suited to larger chassis with stronger cooling.

The verdict is straightforward: choose the Ryzen 5 7640U for superior single-threaded performance, modern multi-threaded workloads, and lower power consumption. Choose the Ryzen 7 7735HS if you specifically need the extra cores for legacy multi-threaded benchmarks or PassMark-heavy integer workloads.

FAQ

Q: Which CPU has the higher boost clock?

A: The AMD Ryzen 5 7640U has a boost clock of 4.90 GHz, while the AMD Ryzen 7 7735HS has a boost clock of 4.75 GHz.

Q: What is the difference in multi-core performance between the two?

A: The results vary by benchmark. The Ryzen 5 7640U leads in Cinebench R23 multi-core by 36.9% (17936 vs 13106) and Geekbench multi-core by 5.9% (8595 vs 8114), but the Ryzen 7 7735HS leads in Cinebench R15 multi-core by 16.1% (2153.4 vs 1807).

Q: Which processor has more cores and threads?

A: The AMD Ryzen 7 7735HS has 8 cores and 16 threads, while the AMD Ryzen 5 7640U has 6 cores and 12 threads.

Q: What are the power consumption ratings?

A: The AMD Ryzen 5 7640U has a TDP of 15 watts, and the AMD Ryzen 7 7735HS has a TDP of 35 watts.

Q: Which CPU supports higher memory bandwidth?

A: The AMD Ryzen 5 7640U supports 89.6 GB/s, while the AMD Ryzen 7 7735HS supports 76.8 GB/s, both using dual-channel DDR5.

Q: How do the integrated graphics compare?

A: The AMD Ryzen 5 7640U features Radeon 760M graphics, while the AMD Ryzen 7 7735HS features Radeon 680M graphics.

Where Each One Wins

The AMD Ryzen 5 7640U wins in all single-threaded benchmarks: Cinebench R15 single-core (255 vs 248, 2.8% ahead), Cinebench R23 single-core (2532 vs 1546, 63.8% ahead), Geekbench single-core (2127 vs 1699, 25.2% ahead), PassMark single-thread (3524 vs 3296, 6.9% ahead), and PassMark singlethread (same scores). It also wins in PassMark find prime numbers (74 vs 59, 25.4% ahead) and PassMark physics (1169 vs 1073, 8.9% ahead). In modern multi-threaded tests, the Ryzen 5 7640U wins Cinebench R23 multi-core (17936 vs 13106, 36.9% ahead) and Geekbench multi-core (8595 vs 8114, 5.9% ahead).

The AMD Ryzen 7 7735HS wins in legacy multi-threaded and specialized workloads: Cinebench R15 multi-core (2153.4 vs 1807, 16.1% ahead), PassMark data compression (293278 vs 240032, 18.2% ahead), PassMark data encryption (18237 vs 14954, 18% ahead), PassMark extended instructions (20050 vs 17019, 15.1% ahead), PassMark floating point math (47865 vs 41093, 14.1% ahead), PassMark integer math (85309 vs 70483, 17.4% ahead), PassMark multithread (23166 vs 21115, 8.9% ahead), and PassMark random string sorting (30388 vs 29382, 3.3% ahead).

For real-world use, the Ryzen 5 7640U is stronger for everyday responsiveness, single-threaded applications, and modern software that takes advantage of Zen 4 optimizations. The Ryzen 7 7735HS is stronger for batch workloads, data-heavy operations, and applications that still use older threading models.

Specification Differences

The two processors differ in several key specifications. The AMD Ryzen 5 7640U has 6 cores and 12 threads, while the AMD Ryzen 7 7735HS has 8 cores and 16 threads. Base clocks are 3.50 GHz versus 3.20 GHz, and boost clocks are 4.90 GHz versus 4.75 GHz, both favoring the Ryzen 5 7640U. TDP differs substantially: 15 watts for the Ryzen 5 7640U versus 35 watts for the Ryzen 7 7735HS.

Architecture and process node differ: the Ryzen 5 7640U uses Zen 4 (Phoenix) on TSMC's 4 nm process, while the Ryzen 7 7735HS uses Zen 3+ (Rembrandt-R) on TSMC's 6 nm process. The Ryzen 5 7640U has a die size of 178 mm², while the Ryzen 7 7735HS has a die size of 210 mm². Transistor count is listed as 25,000 million for the Ryzen 5 7640U, with no figure provided for the Ryzen 7 7735HS.

Cache configurations differ in L2: the Ryzen 5 7640U has 1 MB per core, the Ryzen 7 7735HS has 512 KB per core. Both have 64 KB L1 per core and 16 MB shared L3. Memory bandwidth is 89.6 GB/s for the Ryzen 5 7640U versus 76.8 GB/s for the Ryzen 7 7735HS. Socket types differ: FP8 for the Ryzen 5 7640U, FP7 for the Ryzen 7 7735HS. Integrated graphics are Radeon 760M versus Radeon 680M. Both support DDR5, dual-channel memory, ECC memory, PCIe Gen 4 with 20 lanes, are in the mobile market segment, and are active production. Release dates differ: the Ryzen 5 7640U launched on 2023-05-02, while the Ryzen 7 7735HS launched on 2023-03-31. Neither processor has an unlocked multiplier.