AMD Opteron 4280 vs Intel Core i7-5557U Comparison

The Intel Core i7-5557U and AMD Opteron 4280 occupy opposite ends of the computing spectrum, yet their average benchmark scores land nearly identical: 1110 for the Intel part versus 1107 for the AMD chip. This near-parity in aggregate performance masks a fundamental split in how each processor achieves its results. The data shows a mobile dual-core with integrated graphics facing a server octa-core without any, and the benchmark outcomes reflect that architectural chasm clearly.

Where Each One Wins

The AMD Opteron 4280 claims every head-to-head benchmark win in this comparison, taking all five recorded tests. Its victories are consistent and substantial, ranging from a 29.9% advantage in Cinebench R15 multicore to a 30.1% margin in Cinebench R20 singlecore. The Opteron’s eight physical cores provide a clear throughput advantage in threaded workloads, but notably, it also wins in single-core tests, which is unexpected given its server orientation and lower base clock.

The Intel Core i7-5557U wins nowhere in the direct comparison. However, its value emerges in areas not captured by these particular benchmarks. The data shows the Intel part carries integrated Intel Iris 6100 graphics, while the Opteron has no integrated graphics at all. The i7-5557U also consumes far less power, with a 28 TDP versus the Opteron’s 95 TDP, making it suitable for compact mobile systems where the AMD chip’s server socket and thermal requirements would be impractical.

The benchmark split tells a story of workload specialization. For heavily threaded rendering tasks like Cinebench R23 multicore, the Opteron’s 3828 score versus the Intel’s 2682 represents a 29.9% lead. Yet for single-threaded responsiveness, the Opteron still leads by 30% in Cinebench R23 singlecore, suggesting its higher boost clock of 3.50 GHz overcomes the Intel’s architectural efficiency. The real distinction is market segment: the Opteron targets server and workstation deployments, while the i7-5557U serves mobile computing.

Architecture Differences

The two processors come from different manufacturing eras and design philosophies. The Intel i7-5557U uses a 14 nm process node from Intel’s own foundry, packing 1,900 million transistors into a 133 mm² die. The AMD Opteron 4280 relies on a 32 nm process from GlobalFoundries, with 1,200 million transistors spread across a much larger 315 mm² die. This generational gap explains why the Intel chip achieves competitive aggregate scores with only two cores.

Core counts diverge sharply: the Intel part has 2 cores and 4 threads, while the AMD part has 8 cores and 8 threads. The Opteron’s Bulldozer architecture, codenamed Valencia, uses a modular design that pairs cores into shared compute units. Cache configurations reflect this: the Intel chip provides 64 KB L1 and 256 KB L2 per core, plus 4 MB shared L3. The AMD chip offers 384 KB L1 total, 8 MB L2, and 8 MB shared L3 — substantially more cache overall, though shared across more cores.

Memory support shows both use DDR3 with dual-channel buses, but the Intel part achieves 29.9 GB/s bandwidth versus the Opteron’s 25.6 GB/s. The AMD chip supports ECC memory, which the Intel does not, reflecting its server pedigree. PCIe generations differ: Intel lists Gen 2 with 12 lanes (CPU only), while AMD lists Gen 2 without lane specification. The Intel chip includes integrated Iris 6100 graphics; the Opteron has none. Both are end-of-life products, released in 2015 and 2011 respectively.

Head-to-Head Benchmarks

The Opteron’s dominance is uniform across every recorded test, with margins hovering near 30%. In Cinebench R15 multicore, the AMD part scores 385 against the Intel’s 270, a 29.9% deficit for the i7-5557U. Moving to Cinebench R20 multicore, the Opteron reaches 1607 versus 1126, again a 29.9% gap. The pattern persists in Cinebench R23 multicore: 3828 versus 2682, with the same 29.9% delta.

Single-core results tell a similar story, though the percentages shift slightly. Cinebench R20 singlecore shows the Opteron at 226 versus Intel’s 158, a 30.1% lead — the largest margin in the entire comparison. Cinebench R23 singlecore records 540 versus 378, a 30% difference. These single-core wins are particularly telling because they suggest the Opteron’s 3.50 GHz boost clock outperforms the Intel’s 3.40 GHz boost, despite the Intel chip’s newer architecture and higher base clock of 3.10 GHz versus 2.80 GHz.

The consistency of these deltas — all falling between 29.9% and 30.1% — indicates the performance gap is structural rather than workload-specific. The Opteron’s advantage scales nearly identically across different Cinebench versions and thread counts. Interestingly, the Intel chip’s average benchmark score of 1110 slightly exceeds the Opteron’s 1107, but this is because the Intel part has additional Geekbench scores (multicore 2099, singlecore 1060) that the Opteron lacks, skewing the aggregate.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core i7-5557U has an average benchmark score of 1110, while the AMD Opteron 4280 scores 1107, a difference of 0.2% in favor of Intel.

Q: Does the AMD Opteron win in any single-core test?

A: Yes. The Opteron wins Cinebench R20 singlecore with 226 versus Intel’s 158 (30.1% lead) and Cinebench R23 singlecore with 540 versus 378 (30% lead).

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

A: The Intel i7-5557U has a 28 TDP, while the AMD Opteron 4280 has a 95 TDP, making the Intel part significantly more power-efficient.

Q: Which processor supports ECC memory?

A: The AMD Opteron 4280 supports ECC memory, while the Intel Core i7-5557U does not.

Q: How do their transistor counts compare?

A: The Intel chip contains 1,900 million transistors on a 133 mm² die, while the AMD chip has 1,200 million transistors on a 315 mm² die.

Q: What are the launch MSRPs?

A: The Intel Core i7-5557U has a launch MSRP of $426, and the AMD Opteron 4280 has a launch MSRP of $255.

The Verdict

The data directs different buyers to each processor. The AMD Opteron 4280 is the clear choice for threaded rendering workloads, winning all five head-to-head benchmarks with margins consistently around 30%. Its eight cores and larger cache hierarchy deliver superior Cinebench performance across every version tested. Server and workstation environments that prioritize ECC memory support and multi-threaded throughput will favor the Opteron despite its higher TDP and older 32 nm process.

The Intel Core i7-5557U, despite losing every direct comparison, remains relevant for its intended mobile segment. Its integrated Iris 6100 graphics eliminates the need for a discrete GPU, and its 28 TDP suits thin-and-light laptops. The higher memory bandwidth of 29.9 GB/s and smaller die size indicate efficiency advantages that matter in compact systems. The i7-5557U’s average score of 1110 edges out the Opteron’s 1107, and its nearest rivals include the Intel Xeon E5630 and Core i5-4570T, indicating solid overall performance for its class.

For users choosing between these two, the decision hinges on form factor and workload. The Opteron wins purely on benchmark performance — its 8 cores and 3.50 GHz boost clock outpace the Intel part in every recorded test. The Intel chip wins on power efficiency, integrated graphics, and modern process technology. Neither processor holds a universal advantage; the Opteron dominates compute, while the i7-5557U offers mobile viability that the server-oriented AMD part cannot match.

Specification Differences

| Specification | Intel Core i7-5557U | AMD Opteron 4280 |

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

| Cores | 2 | 8 |

| Threads | 4 | 8 |

| Base Clock | 3.10 GHz | 2.80 GHz |

| Boost Clock | 3.40 GHz | 3.50 GHz |

| TDP | 28 W | 95 W |

| Process Node | 14 nm | 32 nm |

| Transistors | 1,900 million | 1,200 million |

| Die Size | 133 mm² | 315 mm² |

| L1 Cache | 64 KB (per core) | 384 KB |

| L2 Cache | 256 KB (per core) | 8 MB |

| L3 Cache | 4 MB (shared) | 8 MB (shared) |

| Memory Bandwidth | 29.9 GB/s | 25.6 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 2, 12 Lanes (CPU only) | Gen 2 |

| Integrated Graphics | Intel Iris 6100 | None |

| Market Segment | Mobile | Server/Workstation |

| Socket | Intel BGA 1168 | AMD Socket C32 |

| Release Date | 2015-02-28 | 2011-11-13 |

| Launch MSRP | $426 | $255 |

| Part Number | SR26E | OS4280WLU8KGU |