AMD Ryzen 5 PRO 8640U vs Intel Core 3 305 Comparison

Head-to-Head Benchmarks

The recorded data shows the AMD Ryzen 5 PRO 8640U dominates the Intel Core 3 305 across most tested workloads, winning 13 of the 17 benchmark comparisons. The Cinebench suite reveals a consistent pattern: the AMD part leads by 52.3% in R15 multicore (2014 vs 1322), 52.7% in R15 singlecore (284 vs 186), and maintains near-identical margins in R20 and R23. Specifically, R20 multicore shows 8392 against 5511 (52.3% advantage), R20 singlecore shows 1184 against 777 (52.4%), R23 multicore shows 19982 against 13123 (52.3%), and R23 singlecore shows 2821 against 1852 (52.3%). These numbers indicate that the AMD processor delivers roughly 1.5 times the rendering performance of the Intel chip in every Cinebench iteration, regardless of thread count or generation of the test.

The Passmark suite offers a more granular view with several notable outliers. The largest margin in the entire comparison appears in integer math, where the Ryzen 5 PRO 8640U scores 74875 versus 32295 for the Core 3 305, a 131.8% lead. Data compression follows closely at 260925 versus 146857, a 77.7% advantage. Random string sorting shows a 82.2% gap (32114 vs 17623), while data encryption favors AMD by 43.8% (15843 vs 11019) and extended instructions by 41.3% (19130 vs 13543). Multithread performance in Passmark gives AMD a 47.6% edge (22795 vs 15439), and floating point math shows a narrower 7% lead (45265 vs 42284).

The Intel Core 3 305 claims four wins, and each reveals a specific strength. The most dramatic is find prime numbers: Intel scores 115 against AMD's 78, a 32.2% advantage. This workload, which stresses integer division and branch prediction, clearly favors the Intel architecture. The other three wins are more modest. Passmark single thread (and the duplicate singlethread entry) shows Intel at 3977 versus 3732, a 6.2% edge. Passmark physics gives Intel 1233 against 1154, a 6.4% margin. These results suggest the Intel part has a slight single-thread efficiency advantage in certain synthetic tests, but the overall benchmark average tells a different story: the AMD processor's average benchmark score is 30254, while the Intel processor sits at 18302.

Architecture Differences

The two processors come from different design philosophies and manufacturing processes. The AMD Ryzen 5 PRO 8640U uses the Zen 4 architecture on the Hawk Point codename, built on a 4 nm process at TSMC with 25,000 million transistors on a 178 mm² die. The Intel Core 3 305 uses the Wildcat Lake codename on a 3 nm process at Intel, with no transistor count or die size recorded in the database. Both are 6-core parts, but AMD enables 12 threads through simultaneous multithreading, while Intel's 6 cores handle 6 threads, meaning no hyperthreading.

Cache hierarchies differ substantially. AMD allocates 64 KB of L1 per core and 1 MB of L2 per core, with 16 MB of shared L3. Intel's cache is reported as 192 KB L1 total, 2.5 MB L2 total, and 6 MB shared L3. The AMD part also has a higher base clock (3.50 GHz vs 1.50 GHz) and a higher boost clock (4.90 GHz vs 4.30 GHz). Thermal design power differs as well: AMD is rated at 28 W, Intel at 15 W, which places the Intel chip in a lower power envelope despite its smaller process node.

Memory support and I/O configurations show clear divergence. AMD supports DDR5 in dual-channel mode with 89.6 GB/s bandwidth and includes ECC memory support. Intel supports DDR5 and LPDDR5X but only in single-channel mode, with 59.7 GB/s bandwidth and no ECC. PCIe connectivity favors AMD with Gen 4 and 20 lanes (CPU only), while Intel offers Gen 4 with 6 lanes. Integrated graphics also differ: AMD uses Radeon 760M, while Intel uses Xe3 Graphics with 1 Xe core. The AMD part uses AMD Socket FP7, and Intel uses Intel BGA 1516. Neither processor has an unlocked multiplier.

Where Each One Wins

The AMD Ryzen 5 PRO 8640U is the clear choice for multi-threaded productivity and content creation workloads. Every Cinebench test, which measures rendering and 3D scene creation, goes to AMD with the same 52.3% to 52.7% margin. The Passmark multithread test confirms this with a 47.6% lead. Data-heavy tasks also favor AMD decisively: compression (77.7%), integer math (131.8%), random string sorting (82.2%), encryption (43.8%), and extended instructions (41.3%). Floating point math also goes to AMD, though by a smaller 7% margin. For users running compilers, video encoding, database operations, or scientific calculations that use these instruction paths, the AMD processor delivers between 1.4 and 2.3 times the throughput of the Intel part.

The Intel Core 3 305 wins in four specific areas. The prime number test (115 vs 78) indicates that certain integer-heavy algorithms with unpredictable branches execute faster on the Intel architecture. The physics test (1233 vs 1154) and single-thread Passmark (3977 vs 3732) show a modest advantage in light-threaded or physics-simulation scenarios. These wins suggest that for applications with low thread counts and high per-core efficiency, the Intel chip can be competitive. However, the margins in these wins (6.2% to 32.2%) are smaller than many of AMD's victories, and the Intel part's overall percentile ranking (72nd vs AMD's 81st) reflects its narrower appeal.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 5 PRO 8640U records an average benchmark score of 30254, while the Intel Core 3 305 records 18302. This places AMD in the 81st percentile of all CPUs and Intel in the 72nd percentile.

Q: How large is the Cinebench R23 multicore gap?

A: In R23 multicore, the AMD processor scores 19982 and the Intel processor scores 13123, giving AMD a 52.3% advantage in this rendering workload.

Q: Does the Intel processor win any benchmark by a large margin?

A: Yes, the Intel Core 3 305 wins the Passmark find prime numbers test by 32.2%, scoring 115 versus AMD's 78.

Q: What memory bandwidth does each processor support?

A: The AMD Ryzen 5 PRO 8640U supports dual-channel DDR5 at 89.6 GB/s. The Intel Core 3 305 supports single-channel DDR5 and LPDDR5X at 59.7 GB/s.

Q: How do the core and thread counts compare?

A: Both processors have 6 cores, but the AMD Ryzen 5 PRO 8640U has 12 threads, while the Intel Core 3 305 has 6 threads.

Q: Which processor supports ECC memory?

A: The AMD Ryzen 5 PRO 8640U supports ECC memory. The Intel Core 3 305 does not.

The Verdict

The benchmark data indicates that the AMD Ryzen 5 PRO 8640U is the superior processor for the vast majority of tasks. It wins 13 of 17 head-to-head comparisons, holds an 81st percentile ranking versus 72nd for Intel, and posts an average score 65.3% higher. The Cinebench results are uniform: AMD leads by roughly 52% across all versions and thread counts, which means users running rendering, modeling, or any multi-threaded compute workload should expect significantly faster completion times. The Passmark suite reinforces this with major wins in integer math, compression, encryption, and sorting.

The Intel Core 3 305 does have a role. Its 15 W TDP and single-channel memory support suggest a lower-power design, and its wins in prime number finding, physics, and single-thread Passmark show that it can handle certain light-threaded or branch-heavy workloads with a slight edge. The 6.2% single-thread lead and 6.4% physics lead are real but narrow. For users whose applications are dominated by those specific patterns, the Intel chip offers a measurable advantage. However, the overall record, the 13 vs 4 win split, and the average score difference of 11952 points make the AMD Ryzen 5 PRO 8640U the data-backed pick for general-purpose mobile computing.

Specification Differences

| Specification | AMD Ryzen 5 PRO 8640U | Intel Core 3 305 |

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

| Threads | 12 | 6 |

| Base clock | 3.50 GHz | 1.50 GHz |

| Boost clock | 4.90 GHz | 4.30 GHz |

| TDP | 28 W | 15 W |

| Socket | AMD Socket FP7 | Intel BGA 1516 |

| Architecture | Zen 4 | (not listed) |

| Codename | Hawk Point | Wildcat Lake |

| Process node | 4 nm | 3 nm |

| Foundry | TSMC | Intel |

| Transistors | 25,000 million | (not listed) |

| Die size | 178 mm² | (not listed) |

| L1 cache | 64 KB per core | 192 KB total |

| L2 cache | 1 MB per core | 2.5 MB total |

| L3 cache | 16 MB shared | 6 MB shared |

| Memory support | DDR5 | DDR5, LPDDR5X |

| Memory bus | Dual-channel | Single-channel |

| Memory bandwidth | 89.6 GB/s | 59.7 GB/s |

| ECC memory | Yes | No |

| PCIe | Gen 4, 20 lanes | Gen 4, 6 lanes |

| Integrated graphics | Radeon 760M | Intel Xe3 Graphics (1 Xe) |

| Release date | 2024-04-15 | 2026-04-15 |

| Launch MSRP | (not listed) | $309 |