AMD Opteron 6366 HE vs AMD Opteron 6376 Comparison

The AMD Opteron 6366 HE and AMD Opteron 6376 are nearly identical twins from the same Abu Dhabi generation, but the benchmark data reveals a clear, albeit narrow, winner. Across every single tested workload, the 6366 HE edges out the 6376, despite the 6376 having a higher base clock and higher TDP. This makes the 6366 HE the better choice for anyone running these legacy server platforms, as it delivers equal or slightly better performance while consuming significantly less power. The 6376, however, remains a valid option if you specifically need the higher base clock for lightly threaded tasks that do not boost, though the data shows this advantage does not translate into a single benchmark win.

The Verdict

The data is unambiguous: the AMD Opteron 6366 HE wins 6 out of 6 head-to-head benchmarks against the AMD Opteron 6376. The margins are slim, ranging from a 0.6% lead in Cinebench R15 multi-core to a 0.7% lead in Cinebench R20 and R23 tests, but the consistency is telling. The 6366 HE’s average benchmark score of 1379 also edges out the 6376’s 1370, placing it in the 36th percentile of all CPUs, the same percentile as the 6376.

For a server/workstation buyer, the choice is straightforward: the 6366 HE offers the same core count and better measured performance in these benchmarks with an 85W TDP versus the 6376’s 115W TDP. This is a significant efficiency advantage that can lower operating costs in a dense server environment. The 6376’s only theoretical appeal is its 2.30GHz base clock versus the 6366 HE’s 1.80GHz, which could matter for workloads that never utilize boost clocks. However, since no benchmark in this dataset shows the 6376 winning, that scenario is purely hypothetical. The 6366 HE is the recommended pick based on performance data alone.

Architecture Differences

Both processors share the same foundational architecture. They are built on AMD’s Piledriver architecture under the codename “Abu Dhabi,” part of the Opteron 6000 series. Both use a 32nm process node from GlobalFoundries, contain 2,400 million transistors, and feature a dual-die design with a die size of 2x 315 mm². The cache configuration is identical: 768 KB of L1, 2 MB of L2 per module, and 8 MB of L3 per die. Memory support is also the same, with quad-channel DDR3 and a memory bandwidth of 59.7 GB/s, plus ECC support.

The key architectural difference is not in the core design but in the operating parameters. The 6376 has a higher base clock of 2.30GHz and a slightly higher boost clock of 3.20GHz, compared to the 6366 HE’s 1.80GHz base and 3.10GHz boost. The “HE” suffix in the 6366 HE designation indicates a high-efficiency variant, which is reflected in its lower 85W TDP versus the 6376’s 115W TDP. Both parts use the same AMD Socket G34, have 16 cores and 16 threads, feature PCIe Gen 2, and lack integrated graphics. Neither is multiplier-unlocked, and both were released on the same date, November 4, 2012, and are now end-of-life.

Head-to-Head Benchmarks

The benchmark results show a consistent pattern where the 6366 HE holds a slight edge in every test. In Cinebench R15 multi-core, the 6366 HE scores 480 against the 6376’s 477, a 0.6% advantage. The single-core R15 test is a tie at 67 points for both, with a 0% delta, meaning the higher boost clock of the 6376 did not yield any measurable benefit here.

Moving to Cinebench R20, the 6366 HE scores 2003 multi-core versus 1989 for the 6376, a 0.7% lead. In R20 single-core, the 6366 HE scores 282 against 280, again a 0.7% advantage. The trend continues in Cinebench R23, where the 6366 HE scores 4771 multi-core and 673 single-core, while the 6376 scores 4736 multi-core and 668 single-core. Both R23 deltas are 0.7% in favor of the 6366 HE.

The data indicates that the 6366 HE’s efficiency tuning does not compromise performance; rather, it appears to slightly improve it. The average benchmark score of 1379 for the 6366 HE versus 1370 for the 6376 reinforces this, with the 6366 HE matching the performance of an AMD Ryzen 3 PRO 2300U and an AMD Ryzen 3 PRO 1200, both with a 0% deltaPct. The 6376, meanwhile, matches an Intel Core i7-2600 with a 0% deltaPct.

FAQ

Q: Which processor has a higher base clock?

A: The AMD Opteron 6376 has a base clock of 2.30GHz, while the AMD Opteron 6366 HE has a base clock of 1.80GHz.

Q: Do both processors support the same memory type?

A: Yes, both support DDR3 memory with a quad-channel bus and a memory bandwidth of 59.7 GB/s, and both support ECC memory.

Q: Which processor has a higher TDP?

A: The AMD Opteron 6376 has a TDP of 115W, which is higher than the AMD Opteron 6366 HE’s 85W TDP.

Q: What is the performance difference in Cinebench R23 multi-core?

A: The AMD Opteron 6366 HE scores 4771, which is 0.7% higher than the AMD Opteron 6376’s score of 4736.

Q: Are these processors from the same architecture generation?

A: Yes, both are based on the Piledriver architecture with the codename Abu Dhabi, part of the Opteron 6000 series, and use a 32nm process node.

Q: Which processor has a higher boost clock?

A: The AMD Opteron 6376 has a boost clock of 3.20GHz, slightly higher than the AMD Opteron 6366 HE’s boost clock of 3.10GHz.

Where Each One Wins

Based strictly on the benchmark data, the AMD Opteron 6366 HE wins in every tested category. It has 6 wins out of 6 head-to-head benchmarks, covering both single-core and multi-core workloads in Cinebench R15, R20, and R23. The single-core win is notable because the 6376 has a higher boost clock; despite that, the 6366 HE matches or beats it in every single-core test. This makes the 6366 HE the superior choice for both heavily threaded server workloads and lightly threaded tasks where boost clocks typically matter.

The AMD Opteron 6376 wins zero benchmarks in this comparison. Its only advantages are its higher base clock of 2.30GHz and higher boost clock of 3.20GHz, but these do not translate into any performance victory in the measured tests. The 6376 could theoretically be preferable for workloads that run at a constant base clock without boosting, but the data provides no evidence that such a scenario would yield better results. Given that the 6366 HE also has a lower TDP, there is no use case where the 6376 is the better pick based on the available data.

Specification Differences

The following table highlights only the fields where the two processors differ:

| Field | AMD Opteron 6366 HE | AMD Opteron 6376 |

| :--- | :--- | :--- |

| Base Clock | 1800.00 MHz | 2300 MHz |

| Boost Clock | 3.10 GHz | 3.20 GHz |

| TDP | 85W | 115W |

| Part Number | OS6366VATGGHK | OS6376WKTGGHK |

| Launch MSRP | $575 | $703 |

| Avg Benchmark Score | 1379 | 1370 |

All other specifications are identical: 16 cores, 16 threads, 768 KB L1 cache, 2 MB L2 per module, 8 MB L3 per die, quad-channel DDR3 memory, 59.7 GB/s memory bandwidth, ECC support, PCIe Gen 2, AMD Socket G34, 32nm process, 2,400 million transistors, and a die size of 2x 315 mm². Both are end-of-life products from the Opteron 6000 series, released on November 4, 2012.