AMD Ryzen 5 7640U vs AMD Ryzen 7 5825U Comparison

The AMD Ryzen 5 7640U decisively outperforms the AMD Ryzen 7 5825U across nearly every benchmark in the database, winning 16 of 17 head-to-head comparisons. The only exception is a narrow loss in PassMark integer math, where the Ryzen 7 5825U scores 72,577 versus 70,483 for the Ryzen 5 7640U, a 2.9% margin. This near-sweep is remarkable because the two processors land in the same performance tier overall — their average benchmark scores are 25,485 and 25,446, respectively, a difference of just 0.2% — yet the distribution of wins heavily favors the newer Zen 4 part.

Head-to-Head Benchmarks

The Ryzen 5 7640U’s largest victory comes in Cinebench R23 multi-core, where it scores 17,936 against the Ryzen 7 5825U’s 10,152. That is a 76.7% advantage, the single biggest delta in the entire comparison. The single-core result in the same test tells a similar story: 2,532 versus 1,452, a 74.4% lead for the 7640U. These are not marginal improvements; they represent a generational leap in both threaded and single-threaded workloads.

Geekbench results confirm the pattern. The 7640U posts 8,595 in multi-core, beating the 5825U’s 7,288 by 17.9%. Single-core Geekbench shows an even larger gap: 2,127 versus 1,618, a 31.5% advantage. Cinebench R15 also goes to the 7640U, with a 9.9% single-core lead (255 versus 232) and a narrower 2.8% multi-core win (1,807 versus 1,757). The R15 multi-core result is the closest race in the entire set, suggesting that older threaded workloads see less benefit from the newer architecture.

PassMark tests heavily favor the 7640U as well. The biggest PassMark win is in find prime numbers, where the 7640U scores 74 versus 48, a 54.2% lead. Physics simulation shows a 51% advantage (1,169 versus 774). Random string sorting goes to the 7640U by 24.8% (29,382 versus 23,539), and extended instructions favor it by 18.2% (17,019 versus 14,394). Multithreaded PassMark shows a 16.5% lead (21,115 versus 18,131), while single-thread PassMark is a 15.4% gap (3,524 versus 3,053). Data compression and encryption are closer: 8.2% (240,032 versus 221,938) and 6.1% (14,954 versus 14,088), respectively. Floating-point math rounds out the wins with a 6.8% margin (41,093 versus 38,482).

The single Ryzen 7 5825U victory in integer math is worth noting. It scores 72,577 versus 70,483, a 2.9% edge. This is the only benchmark where the 8-core, 16-thread configuration appears to leverage its additional cores effectively against the 7640U’s higher clock speeds.

The Verdict

The data is unambiguous: the AMD Ryzen 5 7640U is the superior processor for virtually all workloads. Its 76.7% lead in Cinebench R23 multi-core and 74.4% lead in Cinebench R23 single-core are decisive indicators that the Zen 4 architecture delivers substantially better performance per clock and per core. The 7640U wins in every category that matters for general productivity, content creation, and even legacy single-threaded applications.

The Ryzen 7 5825U should only be considered by users whose workloads are dominated by integer math operations, where it holds a 2.9% advantage. However, this single win is dwarfed by the 7640U’s margins elsewhere. For anyone choosing between these two mobile processors, the 7640U is the clear pick. Its 31.5% Geekbench single-core lead and 17.9% multi-core lead translate directly into faster everyday responsiveness and better performance in threaded applications. The 5825U’s additional two cores and four threads do not compensate for the older Zen 3 architecture’s lower clock speeds and efficiency.

The average benchmark scores place these chips within 0.2% of each other overall, but that aggregate figure hides the fact that the 7640U wins by large margins in most tests. The 5825U’s one win is narrow, while the 7640U’s wins range from 2.8% to 76.7%. Verdict: choose the Ryzen 5 7640U unless integer math is the sole criterion.

Architecture Differences

The Ryzen 5 7640U is built on the Zen 4 architecture with the Phoenix codename, while the Ryzen 7 5825U uses Zen 3 with the Barcelo codename. The process node difference is significant: the 7640U is fabricated on TSMC’s 4 nm process, whereas the 5825U uses TSMC’s 7 nm node. This node shrink contributes to the 7640U’s higher efficiency and performance.

Transistor counts differ dramatically. The 7640U packs 25,000 million transistors on a 178 mm² die, while the 5825U has 10,700 million transistors on a 180 mm² die. Despite similar die sizes, the 7640U has more than twice the transistor density, enabling its superior throughput. The cache hierarchy also differs: both share 64 KB of L1 per core and 16 MB of shared L3, but the L2 cache is 1 MB per core on the 7640U versus 512 KB per core on the 5825U.

Memory support diverges as well. The 7640U supports DDR5 memory with a dual-channel bus and 89.6 GB/s of bandwidth. The 5825U uses DDR4 with a dual-channel bus and 51.2 GB/s of bandwidth. This nearly doubles memory bandwidth for the newer chip, which directly aids multi-core workloads. PCIe connectivity also differs: the 7640U offers Gen 4 with 20 CPU lanes, while the 5825U is limited to Gen 3 with 16 CPU lanes.

The integrated graphics are different as well. The 7640U features Radeon 760M graphics, while the 5825U uses Radeon Vega 8. Both support ECC memory. The socket types are not interchangeable: the 7640U uses AMD Socket FP8, while the 5825U uses AMD Socket FP6.

Specification Differences

The core and thread counts differ, with the 5825U offering 8 cores and 16 threads versus 6 cores and 12 threads on the 7640U. Clock speeds reverse the advantage: the 7640U has a base clock of 3.50 GHz and boost clock of 4.90 GHz, while the 5825U has a base clock of 2.00 GHz and boost clock of 4.50 GHz. Both are 15 W TDP parts, but the 7640U achieves higher clocks within the same power envelope.

The process node is 4 nm for the 7640U and 7 nm for the 5825U. Transistor count is 25,000 million versus 10,700 million. Die size is 178 mm² versus 180 mm². L2 cache per core is 1 MB versus 512 KB. Memory support is DDR5 versus DDR4, with bandwidth of 89.6 GB/s versus 51.2 GB/s. PCIe is Gen 4 with 20 lanes versus Gen 3 with 16 lanes.

Release dates differ: the 7640U launched on 2023-05-02, while the 5825U launched on 2022-01-05. The 7640U has a part number of 100-000001106(FP7r2)100-000001109(FP7)100-000001132(FP8), while the 5825U is 100-000000580. The 7640U lacks a Cinebench R20 score in the database, while the 5825U lacks one as well; both have R15 and R23 results. Neither has a launch MSRP listed.

FAQ

Q: Which processor has a higher single-core Cinebench R23 score?

A: The AMD Ryzen 5 7640U scores 2,532, which is 74.4% higher than the Ryzen 7 5825U’s 1,452.

Q: Does the Ryzen 7 5825U win any benchmark at all?

A: Yes, it wins PassMark integer math with 72,577 versus 70,483 for the Ryzen 5 7640U, a 2.9% margin.

Q: What is the memory bandwidth difference between the two?

A: The Ryzen 5 7640U supports DDR5 with 89.6 GB/s bandwidth, while the Ryzen 7 5825U supports DDR4 with 51.2 GB/s bandwidth.

Q: How do the core counts compare?

A: The Ryzen 7 5825U has 8 cores and 16 threads, while the Ryzen 5 7640U has 6 cores and 12 threads.

Q: Which processor has a higher boost clock?

A: The Ryzen 5 7640U boosts to 4.90 GHz, compared to 4.50 GHz for the Ryzen 7 5825U.

Q: What is the transistor count for each chip?

A: The Ryzen 5 7640U has 25,000 million transistors, while the Ryzen 7 5825U has 10,700 million.

Where Each One Wins

The AMD Ryzen 5 7640U wins in 16 of 17 benchmarks, making it the dominant choice for almost every use case. Its 76.7% lead in Cinebench R23 multi-core means it excels at video rendering, 3D modeling, and other heavily threaded production workloads. The 74.4% single-core lead in the same test makes it superior for everyday applications, web browsing, and office productivity. The 31.5% Geekbench single-core advantage reinforces this, indicating faster response times in single-threaded software.

For data-heavy tasks, the 7640U’s 8.2% lead in data compression and 6.1% lead in data encryption make it the better choice for file archiving and security-focused workloads. The 18.2% advantage in extended instructions benefits scientific computing and complex mathematical simulations. Floating-point math, up 6.8%, supports physics and engineering applications.

The Ryzen 7 5825U’s sole win in integer math (2.9%) points to a narrow niche: workloads that are purely integer-based, such as certain database operations or legacy financial calculations. However, the 5825U’s 8-core configuration does not translate into wins in other multithreaded tests, suggesting that its architecture cannot fully utilize the extra cores against the 7640U’s higher clocks.

For users prioritizing raw performance, the choice is clear: the Ryzen 5 7640U. Its wins span single-core, multi-core, memory-sensitive, and instruction-level benchmarks. The Ryzen 7 5825U remains a viable option only for specialized integer-math scenarios, where its 3% edge might matter. Everywhere else, the 7640U leads by margins ranging from 2.8% to 76.7%.