AMD Ryzen 5 PRO 8640U vs AMD Ryzen 7 7736U Comparison

The AMD Ryzen 7 7736U and AMD Ryzen 5 PRO 8640U are two mobile processors that, despite the Ryzen 7’s higher core count, deliver nearly identical average benchmark scores. The Ryzen 7 7736U averages 30364 points, while the Ryzen 5 PRO 8640U averages 30254 points, a razor-thin 0.4% difference in favor of the Ryzen 7. However, this overall parity hides very different performance profiles: the Ryzen 5 PRO 8640U wins 11 of the 15 head-to-head tests, often by massive margins, while the Ryzen 7 7736U takes only 4 wins, all in specific multi-threaded or instruction-heavy workloads.

Head-to-Head Benchmarks

The most dramatic separation appears in Cinebench results. In Cinebench R23 multi-core, the Ryzen 5 PRO 8640U scores 19982 against the Ryzen 7 7736U’s 12768, a 36.1% advantage. This is a stunning reversal of expectations, as the Ryzen 7 has 8 cores and 16 threads, versus 6 cores and 12 threads for the Ryzen 5. The single-core gap is even wider proportionally: 2821 versus 1548 in Cinebench R23 single-core, a 45.1% deficit for the Ryzen 7. In Cinebench R15, the multi-core scores are nearly tied at 2019 for the Ryzen 7 and 2014 for the Ryzen 5 (a 0.2% win for the Ryzen 7), but the Ryzen 5 dominates single-core at 284 versus 246, a 13.4% lead.

The Ryzen 7’s wins are narrower but real. In Passmark integer math, it scores 78821 versus 74875, a 5.3% lead. Data compression goes its way at 274440 versus 260925, a 5.2% advantage. Extended instructions also favor the Ryzen 7 at 19384 versus 19130, a 1.3% edge. These are workloads that often scale with core count, so the 8-core part holds its ground there. But the Ryzen 5 PRO 8640U strikes back in nearly every other Passmark test. It leads in floating point math (45265 versus 44499, 1.7%), data encryption (15843 versus 15635, 1.3%), and multithread (22795 versus 21725, 4.7%). The biggest single-threaded gaps appear in Passmark single-thread (3732 versus 3350, 10.2%) and physics (1154 versus 1007, 12.7%). Random string sorting shows a 12.3% advantage for the Ryzen 5 at 32114 versus 28172. Find prime numbers is a 28.2% blowout at 78 versus 56.

What the data suggests is that the Ryzen 5 PRO 8640U is not just faster per core; it is faster per thread in most scenarios. The Ryzen 7 7736U only manages to win in a few integer-heavy and compression tasks where its two extra cores can flex. The Cinebench R23 multi-core result is particularly telling: despite having 33% more cores and threads, the Ryzen 7 loses by 36.1%. That is not a minor deficit; it indicates a fundamental architectural advantage for the Ryzen 5 in sustained all-core workloads.

The Verdict

Based strictly on benchmark results, the AMD Ryzen 5 PRO 8640U is the better processor for most users. It wins 11 of 15 head-to-head tests, including all the major Cinebench and Passmark single-thread tests, and its multi-core Cinebench R23 score of 19982 is far superior to the Ryzen 7’s 12768. The Ryzen 7 7736U only wins in data compression, extended instructions, integer math, and a near-tie in Cinebench R15 multi-core. If you prioritize raw single-core speed, physics simulations, random string sorting, or prime number finding, the Ryzen 5 is the clear choice. The data shows no scenario where the Ryzen 7’s extra cores translate into a decisive overall win; its only meaningful victories are in narrow integer tasks.

However, the Ryzen 7 7736U is not obsolete. Its wins in data compression and integer math suggest it handles specific productivity workloads well. If your primary application is heavily integer-based and benefits from 8 cores, the 5.3% lead in integer math and 5.2% lead in data compression are real, if modest. But for general computing, content creation, or any task that uses Cinebench-style rendering, the Ryzen 5 PRO 8640U is the stronger pick. The average benchmark scores are nearly identical (30364 versus 30254), placing both in the 81st percentile of all CPUs, but the Ryzen 5 achieves this with fewer cores and a higher clock speed. The verdict is straightforward: the Ryzen 5 PRO 8640U is the faster chip in the majority of tests, and the Ryzen 7 7736U is the niche pick for integer-heavy multi-threaded workloads.

Where Each One Wins

The AMD Ryzen 7 7736U wins in four specific areas: data compression (274440), extended instructions (19384), integer math (78821), and Cinebench R15 multi-core (2019, by a 0.2% margin). These are workloads that reward having more physical cores, even if each core is slower. The 8-core/16-thread configuration of the Ryzen 7 gives it a genuine edge in integer arithmetic and compression algorithms. For users running database operations, file compression tools, or cryptographic hashing that is integer-bound, the Ryzen 7 offers a measurable, if small, advantage.

The AMD Ryzen 5 PRO 8640U wins everywhere else. Its Cinebench R23 multi-core score of 19982 is 56.5% higher than the Ryzen 7’s 12768, making it the superior choice for rendering, video encoding, and 3D modeling. Its single-core performance is also vastly better: 2821 versus 1548 in Cinebench R23 single-core (45.1% faster), and 3732 versus 3350 in Passmark single-thread (10.2% faster). The Ryzen 5 also wins in floating point math, physics, random string sorting, data encryption, and prime number finding. For any workload that relies on per-core efficiency, the Ryzen 5 is the clear winner.

FAQ

Q: Which CPU has the higher multi-core Cinebench R23 score?

A: The AMD Ryzen 5 PRO 8640U scores 19982, compared to 12768 for the AMD Ryzen 7 7736U, a 36.1% difference in favor of the Ryzen 5.

Q: Is the Ryzen 7 7736U ever faster than the Ryzen 5 PRO 8640U?

A: Yes. It wins in Passmark data compression (274440 vs 260925), extended instructions (19384 vs 19130), integer math (78821 vs 74875), and Cinebench R15 multi-core (2019 vs 2014).

Q: How do their average benchmark scores compare?

A: The Ryzen 7 7736U averages 30364, and the Ryzen 5 PRO 8640U averages 30254, a 0.4% difference favoring the Ryzen 7. Both sit in the 81st percentile of all CPUs.

Q: Does the Ryzen 5 PRO 8640U have a better single-core performance?

A: Yes. In Cinebench R23 single-core, it scores 2821 versus 1548 for the Ryzen 7, a 45.1% lead. In Passmark single-thread, it scores 3732 versus 3350, a 10.2% lead.

Q: Which processor has more cores and threads?

A: The AMD Ryzen 7 7736U has 8 cores and 16 threads. The AMD Ryzen 5 PRO 8640U has 6 cores and 12 threads.

Q: What is the difference in their boost clocks?

A: The Ryzen 5 PRO 8640U boosts to 4.90 GHz, while the Ryzen 7 7736U boosts to 4.70 GHz.

Architecture Differences

The two processors are built on fundamentally different architectures. The AMD Ryzen 7 7736U uses the Zen 3+ architecture, codenamed Rembrandt-R, and is manufactured on TSMC’s 6 nm process node. The AMD Ryzen 5 PRO 8640U uses the newer Zen 4 architecture, codenamed Hawk Point, on TSMC’s 4 nm process node. This node difference is significant: the 4 nm process is more advanced, likely contributing to the Ryzen 5’s higher clock speeds and better per-core efficiency. The Ryzen 5 also has a smaller die size at 178 mm² versus 208 mm² for the Ryzen 7, and it packs 25,000 million transistors, while the Ryzen 7’s transistor count is not listed.

The cache configurations also differ. Both have 64 KB of L1 cache per core and 16 MB of shared L3 cache, but the L2 cache differs: the Ryzen 7 has 512 KB per core, while the Ryzen 5 has 1 MB per core. This larger L2 cache on the Ryzen 5 likely plays a role in its superior single-thread performance. The integrated graphics differ as well: the Ryzen 7 features Radeon 680M, while the Ryzen 5 features Radeon 760M. Both support DDR5 memory and ECC memory, and both use the AMD Socket FP7. The Ryzen 5 PRO 8640U is part of the 8000 series, while the Ryzen 7 7736U is from the 7000 series, reflecting the newer generation for the Ryzen 5.

Specification Differences

The most obvious specification difference is core and thread count: the Ryzen 7 7736U has 8 cores and 16 threads, while the Ryzen 5 PRO 8640U has 6 cores and 12 threads. Clock speeds also differ. The Ryzen 7 has a base clock of 2.70 GHz and a boost clock of 4.70 GHz. The Ryzen 5 has a higher base clock of 3.50 GHz and a higher boost clock of 4.90 GHz. The TDP is different: the Ryzen 7 is rated at 15 W, while the Ryzen 5 is rated at 28 W. This higher TDP for the Ryzen 5 likely enables its higher clocks and explains its superior benchmark performance.

Memory bandwidth also favors the Ryzen 5: it supports 89.6 GB/s, while the Ryzen 7 supports 76.8 GB/s. Both are dual-channel DDR5. The process node differs, as noted, with the Ryzen 7 at 6 nm and the Ryzen 5 at 4 nm. The Ryzen 5 has a larger L2 cache per core (1 MB vs 512 KB) and a smaller die size (178 mm² vs 208 mm²). The integrated GPU is different (Radeon 760M vs Radeon 680M). Release dates differ too: the Ryzen 7 launched on 2023-01-03, while the Ryzen 5 launched on 2024-04-15. Both are active production parts, share the same socket, and have the same PCIe Gen 4, 20-lane configuration. Neither is multiplier-unlocked, and neither has a listed launch MSRP.