AMD EPYC 7742 vs AMD Ryzen 3 7335U Comparison

The AMD EPYC 7742 and AMD Ryzen 3 7335U represent two extreme poles of AMD’s product stack, separated by architecture, market intent, and physical scale. The EPYC 7742 is a 64-core server behemoth built for throughput, while the Ryzen 3 7335U is a 4-core mobile processor designed for efficiency. The benchmark data shows a complete sweep for the EPYC in the head-to-head comparisons, but the story is more nuanced than raw score dominance, as the Ryzen’s integrated graphics and modern process node offer capabilities the server chip lacks.

Where Each One Wins

The AMD EPYC 7742 wins every single benchmark in the head-to-head comparison, with a perfect 6-0 record. Its victories are not marginal; the smallest delta is 449% in Cinebench R23 single-core, while multi-core tests show deltas around 449.4%. This makes it the clear choice for any workload that scales with core count and memory bandwidth, such as virtualization, database processing, or scientific computation. The data shows the EPYC’s 64 cores and 128 threads simply overwhelm the Ryzen’s 4 cores and 8 threads in every threaded test.

The AMD Ryzen 3 7335U, despite losing all head-to-head benchmarks, wins in the context of its intended market segment. It is a mobile processor with a 28 W TDP, which means it can operate in thin-and-light laptops where the EPYC’s 225 W TDP is physically impossible. The Ryzen also features integrated Radeon 660M graphics, a capability the EPYC lacks entirely. In the PassMark suite, the Ryzen shows strengths in data compression (146,309), integer math (42,493), and floating-point math (24,298), indicating it can handle everyday productivity and light content creation tasks without a discrete GPU.

The real split is not about who wins, but about what each chip is for. The EPYC wins on absolute performance and is the only choice for server racks. The Ryzen wins on efficiency, mobility, and integrated graphics, making it the only choice for portable devices. Benchmark results confirm this: the EPYC’s average benchmark score is 16,998, while the Ryzen’s is 16,827, a difference of less than 1%, despite the massive core-count disparity, because the Ryzen’s higher boost clock and newer architecture close the gap in single-threaded tasks.

Architecture Differences

The EPYC 7742 is built on the Zen 2 architecture, codenamed Rome, using a 7 nm process from TSMC. It features 64 cores and 128 threads, with a base clock of 2.25 GHz and a boost clock of 3.40 GHz. The chip uses a chiplet design with a 74 mm² die size and 3,800 million transistors. Its cache layout includes 96 KB of L1 per core, 512 KB of L2 per core, and a massive 256 MB of shared L3 cache. Memory support is DDR4 with an eight-channel bus, delivering 204.8 GB/s of bandwidth. This is a server-class design with ECC memory support and PCIe Gen 4 connectivity.

The Ryzen 3 7335U is built on the Zen 3+ architecture, codenamed Rembrandt-R, using a 6 nm process from TSMC. It has 4 cores and 8 threads, with a base clock of 3.00 GHz and a boost clock of 4.30 GHz. The die size is 208 mm², which is larger than the EPYC’s because it includes integrated Radeon 660M graphics. Cache is smaller: 64 KB of L1 per core, 512 KB of L2 per core, and 8 MB of shared L3. Memory support is DDR5 with a dual-channel bus, delivering 76.8 GB/s. It also supports ECC memory and PCIe Gen 4 with 20 lanes from the CPU.

The key architectural differences are node size, core count, and memory channels. The Ryzen’s 6 nm node is newer and more power-efficient than the EPYC’s 7 nm, which explains the TDP difference (28 W vs 225 W). The EPYC’s eight-channel memory bus provides 2.7 times the bandwidth of the Ryzen’s dual-channel bus, which is critical for multi-threaded server workloads. The Ryzen’s higher boost clock (4.30 GHz vs 3.40 GHz) partially compensates for its lower core count in single-threaded tasks, as seen in the Cinebench single-core scores.

Head-to-Head Benchmarks

The Cinebench R15 multi-core test shows the EPYC 7742 scoring 5,923 against the Ryzen’s 1,078, a delta of 449.4%. This is the clearest illustration of the core-count advantage: the EPYC has 16 times the cores and 16 times the threads, and the benchmark scales almost linearly. The single-core R15 test is less lopsided in relative terms, with the EPYC scoring 836 to the Ryzen’s 152, a delta of 450%. This is surprising because the Ryzen has a higher boost clock, but the EPYC’s Zen 2 architecture still holds a per-core advantage in this older benchmark.

The Cinebench R20 results follow a similar pattern. Multi-core shows the EPYC at 24,682 versus the Ryzen’s 4,495, a delta of 449.1%. Single-core shows 3,484 versus 634, a delta of 449.5%. The consistency of these deltas, hovering near 449-450%, suggests that the EPYC’s advantage is largely a function of its 16x core and thread count, with per-core performance being nearly identical relative to the Ryzen in these tests.

The Cinebench R23 multi-core test shows the EPYC scoring 58,769 versus the Ryzen’s 10,703, a delta of 449.1%. Single-core shows 8,296 versus 1,511, a delta of 449%. Again, the delta is remarkably consistent. This consistency indicates that neither chip has a significant architectural advantage in raw rendering performance; the EPYC simply has more of the same resources. The data implies that if the Ryzen had 64 cores, it would likely match the EPYC, but it does not, and that is the fundamental difference.

The PassMark suite, only available for the Ryzen, shows its strengths in data compression (146,309) and integer math (42,493), but its physics score is a mere 647. The EPYC does not have PassMark scores in this data set, so direct comparison is impossible, but the Ryzen’s scores indicate it is a capable mobile processor, not a server-class one. The Ryzen’s single-thread score of 3,053 in PassMark is respectable for a mobile chip, but it cannot match the EPYC’s Cinebench single-core performance in these specific tests.

The Verdict

The data is unequivocal: the AMD EPYC 7742 is the superior processor for any workload that demands maximum multi-threaded performance. Its 64 cores and 128 threads deliver 449% higher scores in Cinebench multi-core tests compared to the Ryzen 3 7335U, and it also wins single-core tests by 449-450%. For server, workstation, and data-center applications where throughput is paramount, the EPYC is the only logical choice. Its 256 MB of L3 cache and 204.8 GB/s memory bandwidth further cement its position for large-scale data processing.

The AMD Ryzen 3 7335U is the correct choice for mobile computing, where its 28 W TDP makes it feasible for laptops and portable devices. The EPYC’s 225 W TDP is not a mobile specification; it requires a server platform with substantial cooling. The Ryzen’s integrated Radeon 660M graphics provide a complete solution for everyday tasks, and its DDR5 memory support and 6 nm node offer modern efficiency. The data shows it holds its own in single-threaded tasks relative to its core count, and it is designed for a completely different use case.

Neither chip is a substitute for the other. The EPYC wins on absolute performance, but the Ryzen wins on portability and power efficiency. The benchmark data reflects this: the EPYC’s percentile vs all CPUs is 70, and the Ryzen’s is also 70, indicating that both are mid-tier in their respective pools. The EPYC’s nearest rivals include the Intel Core i7-1260P and AMD Ryzen 5 3600, with average scores around 17,000, while the Ryzen’s nearest rivals include the Intel Core i3-12100E and AMD Ryzen 5 7235HS, also around 16,800-16,900. This suggests that in the broader market, both chips are competitive, but in their own domains.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7742 has 64 cores and 128 threads, while the AMD Ryzen 3 7335U has 4 cores and 8 threads.

Q: What is the difference in TDP between the two chips?

A: The EPYC 7742 has a TDP of 225 W, while the Ryzen 3 7335U has a TDP of 28 W.

Q: Does the Ryzen 3 7335U have integrated graphics?

A: Yes, it features integrated Radeon 660M graphics. The EPYC 7742 has no integrated graphics.

Q: Which processor supports DDR5 memory?

A: The Ryzen 3 7335U supports DDR5 memory, while the EPYC 7742 supports DDR4.

Q: What is the largest Cinebench R23 multi-core score in the head-to-head?

A: The EPYC 7742 scores 58,769, which is 449.1% higher than the Ryzen’s 10,703.

Q: What is the memory bandwidth of the EPYC 7742?

A: The EPYC 7742 has a memory bandwidth of 204.8 GB/s, compared to the Ryzen’s 76.8 GB/s.

Specification Differences

| Specification | AMD EPYC 7742 | AMD Ryzen 3 7335U |

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

| Cores | 64 | 4 |

| Threads | 128 | 8 |

| Base Clock | 2.25 GHz | 3.00 GHz |

| Boost Clock | 3.40 GHz | 4.30 GHz |

| TDP | 225 W | 28 W |

| Socket | AMD Socket SP3 | AMD Socket FP7 |

| Architecture | Zen 2 | Zen 3+ |

| Codename | Rome | Rembrandt-R |

| Process Node | 7 nm | 6 nm |

| Die Size | 74 mm² | 208 mm² |

| Transistors | 3,800 million | (not provided) |

| L1 Cache | 96 KB (per core) | 64 KB (per core) |

| L2 Cache | 512 KB (per core) | 512 KB (per core) |

| L3 Cache | 256 MB (shared) | 8 MB (shared) |

| Memory Support | DDR4 | DDR5 |

| Memory Bus | Eight-channel | Dual-channel |

| Memory Bandwidth | 204.8 GB/s | 76.8 GB/s |

| Integrated Graphics | None | Radeon 660M |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2019-08-06 | 2023-01-03 |

| Part Number | 100-000000053 | 100-000000537(FP7)100-000000549(FP7r2) |