AMD Ryzen 5 7500X3D vs AMD Ryzen 5 PRO 8640U Comparison

Head-to-Head Benchmarks

The recorded PassMark data splits eleven shared tests into six wins for the AMD Ryzen 5 7500X3D and five for the AMD Ryzen 5 PRO 8640U. The 7500X3D takes the multithreaded PassMark test with a score of 25047 against 22795, a 9.9% advantage. That margin is solid for a desktop part facing a 28 W mobile chip, but the gap is far from uniform across every workload.

The most dramatic separation appears in prime number finding. The 7500X3D scores 221 versus 78 for the PRO 8640U, a 183.3% delta. This is the single largest victory in either direction, and it points to a workload where the desktop processor's cache hierarchy and sustained power delivery dominate. Physics simulation shows a similarly lopsided result: 2779 versus 1154, a 140.8% margin. Both of these tests reward raw integer throughput and memory latency tolerance, areas where the 7500X3D's 96 MB shared L3 cache can absorb far more working set than the PRO 8640U's 16 MB.

The 7500X3D also wins data compression (271649 vs 260925, 4.1%), extended instructions (20455 vs 19130, 6.9%), and random string sorting (32999 vs 32114, 2.8%). These are moderate edges, but they compound across a mixed workload. In multithreaded PassMark, the 7500X3D's 25047 lands at the 89th percentile against all CPUs, while the PRO 8640U's 22795 sits at the 81st percentile. That eight-point percentile gap understates the per-test differences, because the two processors trade blows so frequently.

The PRO 8640U fights back in single-threaded tests. It scores 3732 on PassMark single thread versus 3494, a 6.4% lead. That result repeats identically in the singlethread variant, confirming the edge is consistent. Integer math also favors the mobile chip: 74875 versus 70774, a 5.5% win. Floating point math goes to the PRO 8640U as well, 45265 against 43594, a 3.7% margin. Data encryption is the narrowest result of all: 15843 versus 15797, a 0.3% edge for the PRO 8640U. These wins share a pattern: the PRO 8640U's higher boost clock of 4.90 GHz versus 4.50 GHz gives it an advantage in latency-sensitive, low-core-count work that does not saturate the cache.

The average benchmark scores tell a different story than the head-to-head wins. The 7500X3D's average is 44573, while the PRO 8640U's is 30254. That 14319-point gap (about 47.3% higher for the desktop part) reflects the 7500X3D's stronger multithreaded and cache-heavy results pulling the mean upward. The PRO 8640U's nearest rivals include the AMD Ryzen 7 2700X at 30213 (0.1% behind) and the Ryzen 7 7736U at 30364 (0.4% ahead), placing it in a performance band roughly comparable to older desktop eight-core parts. The 7500X3D sits among much faster company: the Intel Core Ultra X9 388H at 44466 trails by 0.2%, and the Intel Core i9-13950HX at 44342 trails by 0.5%. These deltas are small, meaning the 7500X3D is effectively tied with those high-end mobile and desktop processors in aggregate.

Where Each One Wins

The 7500X3D wins where cache capacity and sustained power matter. Prime number finding, physics, multithreaded PassMark, data compression, extended instructions, and random string sorting all favor it. These are workloads that either parallelize across all six cores and twelve threads or repeatedly access a large working set. The 96 MB shared L3 cache is the likely differentiator: it can hold substantially more data than the PRO 8640U's 16 MB, reducing trips to memory. The 65 W TDP also allows higher sustained clocks under load, which explains the multithreaded and physics margins.

The PRO 8640U wins where single-core latency and burst performance dominate. PassMark single thread, integer math, floating point math, and data encryption all go its way. The 4.90 GHz boost clock gives it a raw frequency advantage over the 7500X3D's 4.50 GHz, and in short bursts a mobile chip can hit that peak without thermal throttling. Integer and floating point math with small data sets do not stress the cache, so the PRO 8640U's smaller L3 is not a handicap. The encryption result is essentially a tie, but the single-thread and math wins are meaningful for everyday responsiveness.

The use-case split follows the benchmark pattern. A desktop system doing simulation, compression, or heavily threaded rendering would prefer the 7500X3D. A laptop handling office work, light development, or single-threaded applications would see better raw speed from the PRO 8640U. The 7500X3D's multithreaded PassMark lead of 9.9% is real but not overwhelming, suggesting that the PRO 8640U is closer in parallel throughput than the architecture might imply. Conversely, the PRO 8640U's single-thread lead of 6.4% is modest, so the 7500X3D does not fall far behind in response time.

Architecture Differences

Both processors are built on Zen 4 cores, but they come from different families and target different sockets. The 7500X3D is a Raphael desktop chip in the 7000 series using the AMD Socket AM5, while the PRO 8640U is a Hawk Point mobile part in the 8000 series using AMD Socket FP7. The manufacturing nodes differ: the 7500X3D uses a 5 nm process from TSMC, the PRO 8640U uses 4 nm. That node advantage does not translate into a transistor count advantage for the smaller chip, surprisingly. The PRO 8640U packs 25,000 million transistors on a 178 mm² die, while the 7500X3D has 11,270 million on a 71 mm² die. The mobile chip's larger die and higher transistor count likely reflect integrated graphics and other platform logic.

Core and thread counts are identical: six cores and twelve threads each. L1 and L2 caches match as well, 64 KB per core and 1 MB per core respectively. The L3 cache is the major architectural split: 96 MB shared on the 7500X3D versus 16 MB shared on the PRO 8640U. That sixfold difference in L3 capacity is the single most important spec distinction for performance. Memory bandwidth also favors the mobile part slightly: 89.6 GB/s versus 83.2 GB/s, despite both using dual-channel DDR5. The PRO 8640U's PCIe implementation is Gen 4 with 20 lanes, while the 7500X3D offers Gen 5 with 24 lanes.

Clock speeds invert the cache story. The 7500X3D has a base clock of 4.00 GHz and a boost of 4.50 GHz. The PRO 8640U starts lower at 3.50 GHz but boosts higher to 4.90 GHz. The 65 W TDP of the desktop part versus 28 W for the mobile part explains part of this: the PRO 8640U can spike to a high boost briefly, but the 7500X3D can sustain closer to its maximum across all cores. Both support ECC memory and have integrated graphics, but the specific GPU differs: Radeon Graphics on the 7500X3D versus Radeon 760M on the PRO 8640U. The 7500X3D is a desktop part with an active production status and a launch MSRP of $269, while the PRO 8640U has no recorded launch MSRP.

FAQ

Q: Which processor has the higher single-threaded PassMark score?

A: The AMD Ryzen 5 PRO 8640U scores 3732 on PassMark single thread, 6.4% ahead of the 7500X3D's 3494. The same result appears in the singlethread test.

Q: How large is the L3 cache difference?

A: The 7500X3D has 96 MB shared L3 cache, while the PRO 8640U has 16 MB shared. Both use 64 KB L1 per core and 1 MB L2 per core.

Q: What is the multithreaded PassMark score for each?

A: The 7500X3D scores 25047, and the PRO 8640U scores 22795. The desktop part leads by 9.9%.

Q: Which chip has the higher boost clock?

A: The PRO 8640U boosts to 4.90 GHz, while the 7500X3D boosts to 4.50 GHz. The PRO 8640U's base clock is 3.50 GHz versus 4.00 GHz for the 7500X3D.

Q: Do these processors support ECC memory?

A: Yes, both list ECC memory support. Both also use dual-channel DDR5 memory.

Q: What are the percentile ranks against all CPUs?

A: The 7500X3D is in the 89th percentile, and the PRO 8640U is in the 81st percentile. The 7500X3D's average benchmark score is 44573 versus 30254 for the PRO 8640U.

The Verdict

The data points to different buyers for each chip. The 7500X3D is the choice for desktop workloads that scale across cores or repeatedly access large data sets. Its prime number and physics results are more than double the PRO 8640U's, and its multithreaded PassMark lead of nearly 10% confirms a measurable parallel advantage. The 96 MB L3 cache is the clear differentiator, and the 65 W TDP allows it to sustain performance without the power constraints of a mobile part.

The PRO 8640U suits single-threaded and lightly threaded tasks where burst frequency matters. Its 6.4% single-thread lead and 5.5% integer math advantage make it the faster chip for everyday interactive work, and its 28 W TDP is far better suited to laptop chassis. The 4 nm node and higher transistor count suggest a more integrated design, but those features do not overcome the cache deficit in heavy parallel workloads.

The overall average benchmark score strongly favors the 7500X3D: 44573 versus 30254, a 47% gap. That statistic alone would point to the desktop part as the superior processor. However, the head-to-head split of six wins to five shows the PRO 8640U is competitive in a meaningful subset of tests. A user who never runs prime number searches or physics simulations might not notice the difference. A user who does will see the 7500X3D pull ahead by margins of 183% and 141%. The verdict is straightforward: the 7500X3D for maximum throughput and cache-heavy compute, the PRO 8640U for single-thread speed and mobile integration.

Specification Differences

| Specification | AMD Ryzen 5 7500X3D | AMD Ryzen 5 PRO 8640U |

|---|---|---|

| Series | 7000 series | 8000 series |

| Codename | Raphael | Hawk Point |

| Process node | 5 nm | 4 nm |

| Transistors | 11,270 million | 25,000 million |

| Die size | 71 mm² | 178 mm² |

| Base clock | 4.00 GHz | 3.50 GHz |

| Boost clock | 4.50 GHz | 4.90 GHz |

| TDP | 65 W | 28 W |

| Socket | AMD Socket AM5 | AMD Socket FP7 |

| L3 cache | 96 MB (shared) | 16 MB (shared) |

| Memory bandwidth | 83.2 GB/s | 89.6 GB/s |

| PCIe | Gen 5, 24 Lanes (CPU only) | Gen 4, 20 Lanes (CPU only) |

| Integrated graphics | Radeon Graphics | Radeon 760M |

| Market segment | Desktop | Mobile |

| Launch MSRP | $269 | None |

| Part number | 100-000001904 | 100-000001318 (FP7r2), 100-000001378 (FP7) |