AMD Ryzen 5 PRO 8640U vs AMD Ryzen 7 2700X Comparison

The AMD Ryzen 5 PRO 8640U and the AMD Ryzen 7 2700X represent two distinct eras of AMD silicon, and their benchmark profiles reflect that divide. The 8640U, a mobile processor from the 8000 series built on Zen 4, wins 11 of the 13 head-to-head comparisons, while the older 2700X, a desktop part from the 2000 series based on Zen+, takes only 2. Despite this lopsided win count, their overall average benchmark scores are nearly identical—30254 for the 8640U versus 30213 for the 2700X, a difference of just 0.1%—which makes the specific workload analysis essential for understanding where each chip actually excels.

Where Each One Wins

The data splits cleanly along two axes: single-threaded performance and raw multi-core throughput. The Ryzen 5 PRO 8640U dominates every single-threaded and lightly-threaded test, leveraging its architectural advantage to post scores that the 2700X cannot approach. In Cinebench R15 single-core, the 8640U scores 284 against 175.7 for the 2700X, a 61.6% advantage. PassMark single-thread results show a similar gap at 3732 versus 2417, a 54.4% lead. This makes the 8640U the clear choice for workloads that depend on per-core responsiveness, such as interactive applications, real-time data processing, or any task where a single thread is the bottleneck.

The 8640U also wins the majority of multi-threaded tests despite having fewer cores and threads—6 cores and 12 threads versus 8 cores and 16 threads for the 2700X. In Cinebench R15 multi-core, the 8640U scores 2014 against 1762, a 14.3% margin. PassMark multithread shows an even larger gap: 22795 versus 17468, a 30.5% advantage. The 8640U wins PassMark physics by 45.7% (1154 vs 792) and floating-point math by 39% (45265 vs 32563). For integer math, the lead is 17.9% (74875 vs 63485). These results indicate that the newer architecture's efficiency more than compensates for the older chip's additional two cores.

The 2700X claims its two wins in PassMark data compression and data encryption. In data compression, it scores 266134 versus 260925, a 2% edge. Data encryption shows a 6.4% advantage, with 16929 against 15843. These are narrow victories, suggesting the 2700X retains a slight edge in memory-bandwidth-sensitive or legacy-optimized workloads, but the margins are small enough that real-world differences would be minimal.

Architecture Differences

The two processors are built on fundamentally different foundations. The Ryzen 5 PRO 8640U uses the Zen 4 architecture on a 4 nm process from TSMC, with a codename of Hawk Point. It packs 25,000 million transistors into a 178 mm² die. The Ryzen 7 2700X uses the older Zen architecture (specifically Zen+ with codename Pinnacle Ridge) on a 12 nm process from GlobalFoundries, with 4,800 million transistors on a 213 mm² die. This process shrink explains much of the performance-per-watt gap between them.

Cache layouts differ significantly. The 8640U has 64 KB of L1 per core and 1 MB of L2 per core, while the 2700X has 96 KB of L1 per core but only 512 KB of L2 per core. Both share 16 MB of L3, but the 8640U's larger L2 cache likely contributes to its single-threaded superiority. The 8640U supports DDR5 memory with a dual-channel bus and 89.6 GB/s bandwidth, whereas the 2700X uses DDR4 with 46.9 GB/s bandwidth. This memory bandwidth difference is nearly double and directly impacts multi-threaded throughput.

The 8640U is a mobile part on AMD Socket FP7 with a 28 W TDP, while the 2700X is a desktop part on AMD Socket AM4 with a 105 W TDP. The 8640U includes integrated graphics (Radeon 760M), whereas the 2700X has none. PCIe support also differs: the 8640U offers Gen 4 with 20 lanes, while the 2700X offers Gen 3 with 16 lanes. The 8640U supports ECC memory; the 2700X does not. The 2700X has an unlocked multiplier; the 8640U does not. Release dates are nearly six years apart, with the 2700X launching in April 2018 and the 8640U in April 2024.

Head-to-Head Benchmarks

The single most decisive benchmark is PassMark find prime numbers, where the 8640U scores 78 against 41 for the 2700X, a 90.2% advantage. This test is highly sensitive to integer instruction efficiency and memory latency, and the 8640U's Zen 4 architecture delivers a near-doubling of throughput. Similarly, PassMark extended instructions shows an 88.4% lead (19130 vs 10155), indicating that the 8640U handles AVX and other extended instruction sets far more efficiently than the older Zen+ design.

In Cinebench R15 single-core, the 8640U's 284 points versus 175.7 represents a 61.6% gap, which is the largest single-threaded delta in the dataset. PassMark single-thread confirms the trend at 54.4% (3732 vs 2417). These numbers are not marginal; they indicate a generational leap in per-core performance that no amount of core count can compensate for in lightly-threaded workloads.

For multi-threaded workloads, the 8640U's advantage is substantial but less dramatic. PassMark multithread shows a 30.5% lead (22795 vs 17468), while Cinebench R15 multi-core shows a 14.3% lead (2014 vs 1762). PassMark physics is a standout at 45.7% (1154 vs 792), suggesting the 8640U handles physics simulation workloads with particular efficiency. Floating-point math follows at 39% (45265 vs 32563), and integer math at 17.9% (74875 vs 63485). The 8640U also wins random string sorting by 5.1% (32114 vs 30563), a narrow margin that still favors the newer part.

The 2700X's wins are confined to data compression (266134 vs 260925, a 2% edge) and data encryption (16929 vs 15843, a 6.4% edge). These are the only benchmarks where the older chip's 8-core/16-thread configuration and higher base clock of 3.70 GHz (versus 3.50 GHz for the 8640U) translate into a measurable advantage. However, the 8640U's boost clock of 4.90 GHz versus 4.35 GHz for the 2700X helps explain why the newer chip wins nearly everything else.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Ryzen 5 PRO 8640U has an average benchmark score of 30254, while the Ryzen 7 2700X scores 30213. The difference is 0.1%, making them effectively tied in overall average performance.

Q: How much faster is the 8640U in single-threaded performance?

A: In PassMark single-thread, the 8640U scores 3732 versus 2417 for the 2700X, a 54.4% advantage. Cinebench R15 single-core shows an even larger gap at 61.6% (284 vs 175.7).

Q: Does the 2700X win any benchmarks?

A: Yes, the 2700X wins two tests: PassMark data compression by 2% (266134 vs 260925) and PassMark data encryption by 6.4% (16929 vs 15843).

Q: How does core count affect the results?

A: The 2700X has 8 cores and 16 threads, while the 8640U has 6 cores and 12 threads. Despite this, the 8640U wins 11 of 13 benchmarks, including multi-threaded tests like PassMark multithread where it leads by 30.5% (22795 vs 17468).

Q: What is the memory bandwidth difference?

A: The 8640U supports DDR5 with 89.6 GB/s bandwidth, while the 2700X uses DDR4 with 46.9 GB/s. This near-double bandwidth is a key factor in the 8640U's multi-threaded wins.

Q: Are both processors still in production?

A: Yes, both the Ryzen 5 PRO 8640U and the Ryzen 7 2700X have a production status of "Active."

Specification Differences

The two processors differ in nearly every core specification. The 8640U has 6 cores and 12 threads, while the 2700X has 8 cores and 16 threads. Base clocks are 3.50 GHz for the 8640U and 3.70 GHz for the 2700X, but boost clocks favor the newer chip at 4.90 GHz versus 4.35 GHz. TDP is a major differentiator: 28 W for the 8640U versus 105 W for the 2700X.

Process node and foundry differ completely: the 8640U uses 4 nm TSMC, while the 2700X uses 12 nm GlobalFoundries. Transistor counts are 25,000 million versus 4,800 million, and die sizes are 178 mm² versus 213 mm². Cache configurations differ: L1 is 64 KB per core for the 8640U versus 96 KB per core for the 2700X; L2 is 1 MB per core versus 512 KB per core; L3 is 16 MB shared for both.

Memory support differs: the 8640U uses DDR5 with 89.6 GB/s bandwidth, while the 2700X uses DDR4 with 46.9 GB/s. ECC memory is supported on the 8640U but not on the 2700X. PCIe versions and lanes differ: Gen 4 with 20 lanes for the 8640U versus Gen 3 with 16 lanes for the 2700X. The 8640U includes integrated graphics (Radeon 760M), while the 2700X has none. Sockets are FP7 versus AM4, and market segments are Mobile versus Desktop. The 2700X has an unlocked multiplier; the 8640U does not. The 2700X has a launch MSRP of $329.