AMD Opteron 6386 SE vs Intel Xeon E3-1280 v5 Comparison

The AMD Opteron 6386 SE and Intel Xeon E3-1280 v5 are both end-of-life server processors, but they represent radically different design philosophies. The data shows a remarkably tight contest: across six Cinebench benchmarks, the AMD Opteron 6386 SE wins every single test, yet its largest victory is a mere 1% margin. This is a case where a 16-core, dual-die monster from 2012 and a 4-core, 14nm part from 2015 land in the same performance tier, with the final choice hinging on platform characteristics rather than raw compute.

Head-to-Head Benchmarks

The benchmark results are unusual: the AMD Opteron 6386 SE claims a clean sweep with six wins, but the margins are razor-thin. In Cinebench R15 multi-core, the Opteron scores 710 against the Xeon's 707, a 0.4% delta. The single-core R15 test shows the Opteron ahead 100 to 99, a 1% edge – the largest margin in the entire comparison. Moving to Cinebench R20, the Opteron leads 2959 to 2946 in multi-core (0.4%) and 417 to 415 in single-core (0.5%). The pattern holds in Cinebench R23: the Opteron wins multi-core 7047 to 7015 (0.5%) and single-core 994 to 990 (0.4%).

These deltas are effectively noise-level in real-world terms, but they are consistent. The Opteron never loses a single test, which suggests a slight architectural advantage in Cinebench's workload, even with far fewer threads working on the Intel side. In the context of their nearest rivals, both chips sit at the 45th percentile of all CPUs. The Opteron's average benchmark score is 2038, with its closest competitor being the Intel Core i7-7700T at 2039 (0% delta) and the Intel Core i7-3960X at 2037 (0.1% delta). The Xeon E3-1280 v5 averages 2029, directly matching the Intel Xeon E3-1260L v5 at 2029 (0% delta) and trailing the Intel Xeon E3-1240 v5 by just 0.1% (2030).

The practical takeaway: if you sort by average score, these two are separated by only 9 points out of roughly 2000. The Opteron's 16 threads do not translate into a multi-core blowout; instead, they just barely edge out the Xeon's 8 threads. Conversely, the Xeon's high 4.00 GHz boost clock does not give it a single-core lead; the Opteron's older Piledriver cores hold a marginal advantage in these specific Cinebench runs.

Architecture Differences

The architectural gap between these two is vast, reflecting three years of process technology evolution. The AMD Opteron 6386 SE uses the Piledriver architecture (codenamed Abu Dhabi) on a 32 nm process from GlobalFoundries, packing 2,400 million transistors across a dual-die design with a combined die size of 2x 315 mm². The Intel Xeon E3-1280 v5 uses the Skylake architecture (Skylake-DT) on Intel's 14 nm process, with 1,750 million transistors on a single 122 mm² die.

Core counts differ dramatically: the Opteron offers 16 cores and 16 threads (no SMT), while the Xeon offers 4 cores and 8 threads (with Hyper-Threading). This means the Opteron has twice the physical cores but the Xeon doubles its thread count per core. Clock speeds favor Intel on paper: the Xeon has a 3.70 GHz base and 4.00 GHz boost, versus the Opteron's 2.80 GHz base and 3.50 GHz boost. Cache hierarchies are structured differently: the Opteron has 768 KB L1, 2 MB L2 per module, and 8 MB L3 per die (totaling 16 MB across two dies). The Xeon has 64 KB L1 per core, 256 KB L2 per core, and 8 MB shared L3.

Memory and I/O also diverge. The Opteron uses quad-channel DDR3 with 51.2 GB/s bandwidth, while the Xeon uses dual-channel DDR4 with no listed bandwidth figure. Both support ECC memory. The Opteron runs PCIe Gen 2, while the Xeon has PCIe Gen 3 with 16 lanes from the CPU. Sockets are incompatible: AMD Socket G34 versus Intel Socket 1151. Power envelopes differ significantly: the Opteron is rated at 140 W TDP, the Xeon at 80 W TDP. The Opteron launched on 2012-11-04, nearly three years before the Xeon's 2015-10-18 release.

Where Each One Wins

Based strictly on benchmark results, the AMD Opteron 6386 SE wins everywhere in Cinebench, but the margins are so small that the wins are symbolic rather than substantive. The Opteron's 16 cores give it a theoretical advantage in heavily threaded workloads, and the data confirms it leads in all three multi-core tests (R15, R20, R23). However, the lead is never more than 0.5%, meaning the Xeon's 8 threads are nearly as effective as the Opteron's 16 threads in these specific rendering tasks.

The Intel Xeon E3-1280 v5 wins on platform efficiency and modernity. It draws 80 W TDP versus 140 W, uses newer DDR4 memory, and has PCIe Gen 3. The Xeon's 4.00 GHz boost clock is higher than the Opteron's 3.50 GHz, and while that does not translate to a single-core Cinebench win, it implies better responsiveness in lightly threaded tasks that the benchmark suite does not capture. The Xeon also has a much smaller die (122 mm² vs 2x 315 mm²) and fewer transistors (1,750 million vs 2,400 million), indicating a more efficient design.

For use cases, the Opteron suits legacy dual-socket G34 systems where raw core count matters and power draw is not a constraint. The Xeon suits single-socket 1151 systems where lower power, newer memory, and modern PCIe are priorities. Neither chip has integrated graphics, so both require a discrete GPU.

FAQ

Q: Which processor has more cores?

A: The AMD Opteron 6386 SE has 16 cores and 16 threads, while the Intel Xeon E3-1280 v5 has 4 cores and 8 threads.

Q: What is the largest benchmark margin between the two?

A: The largest delta is in Cinebench R15 single-core, where the AMD Opteron 6386 SE scores 100 versus the Xeon's 99, a 1% difference.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Opteron 6386 SE and Intel Xeon E3-1280 v5 support ECC memory.

Q: Which processor has a higher boost clock?

A: The Intel Xeon E3-1280 v5 has a boost clock of 4.00 GHz, compared to the AMD Opteron 6386 SE's 3.50 GHz.

Q: How do their average benchmark scores compare?

A: The AMD Opteron 6386 SE has an average benchmark score of 2038, while the Intel Xeon E3-1280 v5 scores 2029, a difference of 9 points.

Q: What memory types do they support?

A: The AMD Opteron 6386 SE supports DDR3 with a quad-channel bus and 51.2 GB/s bandwidth, while the Intel Xeon E3-1280 v5 supports DDR4 with a dual-channel bus.

Specification Differences

The two processors differ in nearly every key specification. The AMD Opteron 6386 SE uses the Piledriver architecture on a 32 nm process from GlobalFoundries, while the Intel Xeon E3-1280 v5 uses Skylake on a 14 nm process from Intel. Core and thread counts differ: 16 cores/16 threads versus 4 cores/8 threads. Base clocks are 2.80 GHz versus 3.70 GHz; boost clocks are 3.50 GHz versus 4.00 GHz. TDP is 140 W versus 80 W.

Sockets are incompatible: AMD Socket G34 versus Intel Socket 1151. Transistor counts differ: 2,400 million versus 1,750 million, and die sizes are 2x 315 mm² versus 122 mm². L1 cache is 768 KB versus 64 KB (per core); L2 cache is 2 MB (per module) versus 256 KB (per core); L3 cache is 8 MB (per die) versus 8 MB (shared). Memory support is DDR3 quad-channel versus DDR4 dual-channel; memory bandwidth is 51.2 GB/s versus not listed. PCIe is Gen 2 versus Gen 3 with 16 lanes. Release dates are 2012-11-04 versus 2015-10-18. Part numbers are OS6386YETGGHK versus SR2LC. Both have a launch MSRP: the Opteron at $1392 and the Xeon at $612.

The Verdict

The benchmark data is unambiguous: the AMD Opteron 6386 SE wins all six head-to-head Cinebench tests, but the largest margin is 1%. If you are selecting purely on Cinebench scores, the Opteron is the winner, but the margin is so thin that it is statistically irrelevant for most workloads. The Opteron's 16 cores provide a marginal edge in multi-threaded rendering, yet the Xeon's 8 threads come remarkably close, suggesting the Xeon's newer Skylake architecture is vastly more efficient per core.

For a new deployment, the Intel Xeon E3-1280 v5 is the more sensible choice due to its 80 W TDP (43% lower than the Opteron's 140 W), modern DDR4 memory, and PCIe Gen 3 support. The Opteron's platform is older, uses more power, and has slower I/O. However, for someone maintaining an existing dual-socket G34 system or needing maximum core count on a legacy platform, the Opteron offers 16 cores and a 0.4-1% Cinebench advantage. The Xeon's higher 4.00 GHz boost clock also suggests better single-threaded performance outside Cinebench, though the data does not show a win there. Ultimately, the Opteron wins the benchmark contest, but the Xeon wins the platform contest; the data supports choosing the Xeon for efficiency and the Opteron for raw core availability, with performance being effectively a tie.