AMD Ryzen 5 8640U vs AMD Ryzen 7 5700G Comparison

Where Each One Wins

The recorded benchmark data splits these two processors into distinct roles. The AMD Ryzen 7 5700G takes the majority of the head-to-head wins, claiming 10 of the 17 recorded comparisons. Its victories are concentrated in multi-threaded and data-intensive workloads. The AMD Ryzen 5 8640U wins 7 comparisons, and those wins are almost entirely in single-threaded and lightly threaded tests.

The Ryzen 7 5700G is the clear choice for parallel compute. In Cinebench R23 multi-core, it scores 12830.5 against the Ryzen 5 8640U's 10433, a 23% advantage. The Geekbench multi-core result shows a similar pattern: 9950 versus 8185, a 21.6% lead. The PassMark suite reinforces this trend. The 5700G leads in integer math by 34.5%, floating point math by 27.2%, data compression by 38.3%, and data encryption by 45%. These are not marginal differences. The 5700G's eight cores and sixteen threads provide a substantial throughput advantage over the 8640U's six cores and twelve threads.

The Ryzen 5 8640U wins where clock speed and per-core efficiency matter more than core count. Its single-thread results are consistently ahead. In Cinebench R23 single-core, it scores 1651 against the 5700G's 1494, a 9.5% lead. Geekbench single-core shows 2131 versus 1894, an 11.1% advantage. PassMark single-thread follows with 3534 versus 3283, a 7.1% lead. The 8640U also wins in PassMark physics (1033 versus 999) and in the prime number search test (69 versus 59). These wins point to a processor that responds faster to single-threaded requests, likely due to its higher boost clock of 4.90 GHz compared to the 5700G's 4.60 GHz.

The use-case split is therefore clear. The 5700G is for sustained multi-threaded workloads: rendering, video encoding, data processing, and compilation. The 8640U is for responsive single-threaded tasks: general desktop use, office applications, and lightly threaded software where per-core speed is the limiting factor.

The Verdict

The data supports a straightforward recommendation based on workload priority. Users who need maximum multi-threaded throughput should select the AMD Ryzen 7 5700G. Its 23% lead in Cinebench R23 multi-core and 21.6% lead in Geekbench multi-core are decisive for rendering and content creation. The 45% advantage in data encryption and 38.3% advantage in data compression also make it the stronger option for file archiving and security-related tasks.

Users who prioritize single-threaded responsiveness should select the AMD Ryzen 5 8640U. Its 9.5% lead in Cinebench R23 single-core and 11.1% lead in Geekbench single-core indicate faster reaction times in everyday applications. The 8640U also offers a more modern platform foundation with DDR5 memory support and PCIe Gen 4 connectivity, which the 5700G lacks.

The overall average benchmark scores are close. The 5700G records an average benchmark score of 27051, while the 8640U records 26462. The 5700G sits at the 79th percentile among all CPUs, and the 8640U sits at the 78th percentile. These are nearly identical overall standings. The decision should rest on the specific workload profile, not on general performance. The 5700G is the multi-threaded workhorse. The 8640U is the single-threaded sprinter with a more modern feature set.

Head-to-Head Benchmarks

The largest win for the AMD Ryzen 7 5700G comes in PassMark data encryption. The 5700G scores 20325, while the 8640U scores 14013. That is a 45% delta, the widest margin in the entire comparison. This result indicates a substantial advantage in cryptographic workloads, likely stemming from the 5700G's additional cores and threads.

The second largest win is in PassMark data compression. The 5700G scores 318262 against the 8640U's 230080, a 38.3% delta. This is a significant gap for archiving and file transfer tasks. The PassMark integer math test shows a 34.5% lead for the 5700G (91541 versus 68051), and the extended instructions test shows a 32.4% lead (21847 versus 16500). These results confirm that the 5700G's advantage grows as the workload becomes more parallel and compute-intensive.

The Cinebench R15 multi-core test shows a 26.7% lead for the 5700G (2107 versus 1663). The floating point math test shows a 27.2% lead (51296 versus 40330). The Cinebench R23 multi-core test shows a 23% lead (12830.5 versus 10433). The Geekbench multi-core test shows a 21.6% lead (9950 versus 8185). The PassMark multithread test shows a 20.2% lead (24419 versus 20322). The random string sorting test shows an 18.9% lead (33384 versus 28066). Every multi-threaded test in the database favors the 5700G.

The AMD Ryzen 5 8640U wins are smaller in magnitude but consistent. Its largest win is in Geekbench single-core, where it scores 2131 against the 5700G's 1894, an 11.1% delta. The Cinebench R23 single-core test shows a 9.5% lead (1651 versus 1494). The PassMark single-thread test shows a 7.1% lead (3534 versus 3283). The Cinebench R15 single-core test shows a 5.3% lead (256 versus 242.5). The PassMark physics test shows a 3.3% lead (1033 versus 999). The prime number search test shows a 14.5% lead (69 versus 59), which is the 8640U's largest percentage win.

The pattern is consistent across all 17 recorded comparisons. The 5700G wins every multi-threaded test, and the 8640U wins every single-threaded test. There are no mixed results. This clean separation makes the workload-based recommendation straightforward.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The AMD Ryzen 7 5700G wins every multi-threaded benchmark in the database. It leads by 23% in Cinebench R23 multi-core, 21.6% in Geekbench multi-core, and 20.2% in PassMark multithread. Its largest multi-threaded win is 45% in PassMark data encryption.

Q: Which processor is faster in single-core workloads?

A: The AMD Ryzen 5 8640U wins every single-threaded benchmark. It leads by 9.5% in Cinebench R23 single-core, 11.1% in Geekbench single-core, and 7.1% in PassMark single-thread. Its largest single-threaded win is 14.5% in the PassMark prime number search test.

Q: How do their overall average benchmark scores compare?

A: The Ryzen 7 5700G has an average benchmark score of 27051, and the Ryzen 5 8640U has an average score of 26462. The 5700G sits at the 79th percentile among all CPUs, while the 8640U sits at the 78th percentile. Their overall standings are nearly identical.

Q: What are the closest rival comparisons for each processor?

A: The Ryzen 7 5700G is closest to the Intel Core i9-9900K, which has an average score of 27097 and a delta of -0.2%. The Ryzen 5 8640U is closest to the Intel Core i9-12900HK and Intel Core i7-1280P, both with an average score of 26469 and a delta of 0%.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 5 8640U has a boost clock of 4.90 GHz, which is higher than the AMD Ryzen 7 5700G's boost clock of 4.60 GHz. This contributes to the 8640U's single-threaded wins.

Q: Which processor has more cores and threads?

A: The AMD Ryzen 7 5700G has 8 cores and 16 threads. The AMD Ryzen 5 8640U has 6 cores and 12 threads. The 5700G's additional cores drive its multi-threaded advantage.

Architecture Differences

The two processors represent different generations and design goals. The AMD Ryzen 7 5700G is a desktop part from the 5000 series, built on the Zen 3 architecture with the Cezanne codename. It uses a 7 nm process node from TSMC and contains 10,700 million transistors on a 180 mm² die. The AMD Ryzen 5 8640U is a mobile part from the 8000 series, built on the Zen 4 architecture with the Hawk Point codename. It uses a 4 nm process node from TSMC and contains 25,000 million transistors on a 178 mm² die. The 8640U packs more than double the transistor count into a slightly smaller die, reflecting the denser manufacturing process.

The core configurations differ significantly. The 5700G has 8 cores and 16 threads, while the 8640U has 6 cores and 12 threads. The 5700G has a base clock of 3.80 GHz and a boost clock of 4.60 GHz. The 8640U has a lower base clock of 3.50 GHz but a higher boost clock of 4.90 GHz. The 5700G has a TDP of 65 watts, while the 8640U has a TDP of 28 watts. The 8640U is designed for power-constrained mobile environments, while the 5700G is a desktop part with more thermal headroom.

Cache layouts also differ. Both processors have 64 KB of L1 cache per core and 16 MB of L3 cache. The L2 cache differs: the 5700G has 512 KB per core, while the 8640U has 1 MB per core. The 8640U's larger L2 cache per core supports its single-threaded performance advantage.

Memory support is a major generational split. The 5700G supports DDR4 memory with dual-channel access and a memory bandwidth of 51.2 GB/s. The 8640U supports DDR5 memory with dual-channel access and a memory bandwidth of 89.6 GB/s. The 8640U's memory bandwidth is 75% higher, which benefits memory-intensive workloads. Neither processor supports ECC memory.

PCIe connectivity also differs. The 5700G provides PCIe Gen 3 with 16 lanes from the CPU. The 8640U provides PCIe Gen 4 with 20 lanes from the CPU. The 8640U offers both a newer PCIe standard and more lanes.

The integrated graphics differ as well. The 5700G uses Radeon Vega 8 graphics, while the 8640U uses Radeon 760M graphics. The 8640U's graphics solution is from a newer generation, consistent with its more recent release date of December 2023 compared to the 5700G's April 2021 release.

The 5700G uses the AMD Socket AM4 platform and has an unlocked multiplier, allowing overclocking. The 8640U uses the AMD Socket FP8 platform and has a locked multiplier, which is typical for mobile processors. The 5700G is a desktop processor, while the 8640U is a mobile processor. These platform differences reinforce their intended use cases: the 5700G for desktop builds with upgrade flexibility, and the 8640U for laptops and compact mobile systems.