AMD Opteron 6386 SE vs Intel Xeon W-2123 Comparison

The Intel Xeon W-2123 and the AMD Opteron 6386 SE make for one of the strangest matchups in the database: a modern four-core workstation chip against a sixteen-core server veteran, separated by five years of silicon development. Despite the enormous difference in core count, the recorded data shows the Xeon W-2123 winning every single benchmark, a clean six-test sweep that says a great deal about how far per-core performance moved between the Piledriver and Skylake generations. Both processors are now end-of-life, both target the Server/Workstation segment, and both carry an average benchmark score within a whisker of each other: 2079 for the Intel part, 2038 for the AMD part.

Head-to-Head Benchmarks

The sweep is total. In Cinebench R15 multi-core, the Xeon W-2123 scores 724 against 710 for the Opteron 6386 SE, a 2% win. Single-core R15 goes the same way, 102 to 100. Cinebench R20 multi-core lands at 3019 versus 2959, a 2% gap, and R20 single-core reads 425 against 417, a 1.9% advantage for the Intel chip. Cinebench R23 repeats the pattern almost exactly: 7189 to 7047 in multi-core and 1014 to 994 in single-core, both 2% wins for the Xeon.

The consistency is the story. Every margin sits between roughly 2% and 2%, with the tightest being R20 single-core at 1.9%. There is no test where the Opteron's sixteen cores translate into an advantage, not even in the multi-core runs where raw thread count should matter most. Four Skylake cores with hyper-threading, running at a 3.60 base and 3.90 boost clock, match and slightly exceed what sixteen Piledriver cores at a 2.80 base and 3.50 boost can deliver in aggregate throughput. The Opteron's individual modules simply do so little work per clock that quadrupling the core count only pulls it level.

Context from the database reinforces how evenly matched these two land overall. The Xeon W-2123 sits in the 46th percentile versus all CPUs, with nearest rivals including the Intel Core i3-9350KF (average score 2082, 0.1% faster), the Intel Xeon E5-2628 v3 (2076, 0.1% slower), the AMD Ryzen Embedded R2544 (2086, 0.3% faster), and the Intel Xeon E3-1585 v5 (2067, 0.6% slower). The Opteron 6386 SE sits in the 45th percentile, essentially one percentile point behind, and its rivals include the Intel Core i7-7700T (2039, dead even), the Intel Core i7-3960X (2037), the AMD Ryzen 5 4500U (2035), and the Intel Xeon E-2124G (2034). In other words, a 2012 sixteen-core server flagship and a 2017 entry workstation quad-core finish in the same neighborhood of the overall rankings.

The Verdict

The data makes the choice straightforward: the Xeon W-2123 wins every benchmark, consumes less power doing it (120 W TDP versus 140 W), and offers the newer platform. Anyone choosing between these two based on performance should pick the Xeon W-2123, full stop.

The Opteron 6386 SE case rests entirely on factors outside the benchmark suite, and the recorded data is honest about what those are. It offers sixteen physical cores against four, which can matter for workloads that scale with thread count and are not represented in the Cinebench tests. Its Socket G34 platform and DDR3 memory support define it as a legacy system component, whereas the Xeon's Socket 2066 and DDR4 support define a more modern build. Both support ECC memory, so there is no reliability edge either way. Neither chip has an unlocked multiplier, so tuning headroom is off the table for both.

For a database-focused recommendation: the Xeon W-2123 is the pick for any workload measured here. The Opteron 6386 SE is only justifiable where an existing G34 platform or a specific heavily-threaded legacy workload calls for it.

Architecture Differences

The gap between these chips is a study in two eras. The Xeon W-2123 is built on Intel's 14 nm process at Intel's own foundry, using the Skylake architecture (Skylake-W codename), on a single 484 mm² die. The Opteron 6386 SE is a GlobalFoundries 32 nm part using the Piledriver architecture under the Abu Dhabi codename, built as two 315 mm² dies with 2,400 million transistors.

Core and threading models diverge sharply. The Xeon pairs 4 cores with 8 threads via simultaneous multithreading. The Opteron has 16 cores and 16 threads, one thread per core, relying on physical cores rather than SMT. Cache hierarchies also differ: the Xeon carries 64 KB of L1 and 1 MB of L2 per core with 8.25 MB of shared L3, while the Opteron distributes 768 KB of L1, 2 MB of L2 per module, and 8 MB of L3 per die.

Memory and I/O are where the platform age gap is widest. The Xeon supports DDR4 on a quad-channel bus with 85.3 GB/s of bandwidth, and provides PCIe Gen 3 with 48 lanes from the CPU. The Opteron supports DDR3, also quad-channel, but with only 51.2 GB/s of bandwidth, and its PCIe is limited to Gen 2 with no lane count listed in the database. That bandwidth difference, 85.3 GB/s against 51.2 GB/s, is nearly a 40% advantage for the Intel platform before a single compute cycle runs.

Both parts sit in the Server/Workstation segment, both lack integrated graphics, and both are end-of-life. The Xeon W-2123 launched on 2017-08-28 with a launch MSRP of $294, part number SR3LJ. The Opteron 6386 SE launched on 2012-11-04 with a launch MSRP of $1392, part number OS6386YETGGHK.

FAQ

Q: Which CPU is faster overall?

A: The Intel Xeon W-2123. It won all six recorded Cinebench tests with margins of roughly 2% each, and its average benchmark score of 2079 beats the Opteron's 2038.

Q: Does the Opteron's 16-core count give it any benchmark win?

A: No. Even in multi-core tests, the Xeon W-2123 stays ahead: 724 to 710 in R15, 3019 to 2959 in R20, and 7189 to 7047 in R23.

Q: How do their single-core scores compare?

A: The Xeon leads narrowly everywhere: 102 to 100 in R15, 425 to 417 in R20, and 1014 to 994 in R23, a consistent 2% advantage.

Q: Which platform has better memory support?

A: The Xeon W-2123 supports DDR4 with 85.3 GB/s of quad-channel bandwidth. The Opteron 6386 SE supports DDR3 with 51.2 GB/s, also quad-channel.

Q: Do both CPUs support ECC memory?

A: Yes, both the Xeon W-2123 and the Opteron 6386 SE support ECC memory.

Q: What sockets do these use?

A: The Xeon W-2123 uses Intel Socket 2066. The Opteron 6386 SE uses AMD Socket G34.

Q: Are either of these still in production?

A: No. Both are listed as end-of-life in the database.

Where Each One Wins

The Xeon W-2123 wins everything the database measures. It is faster in every multi-core test, every single-core test, it draws less power at 120 W TDP versus 140 W, it offers double the memory bandwidth through DDR4, and it provides modern PCIe Gen 3 connectivity with 48 CPU lanes. For rendering, general workstation duty, and any workload where per-core speed matters, the recorded data gives it a clean sweep. Its percentile placement, 46th against the Opteron's 45th, confirms the two are peers in overall ranking, but peers with the Xeon ahead in every measured category.

The Opteron 6386 SE wins nothing in the benchmarks, but its strengths are structural. Sixteen physical cores, a dual-die package with 2,400 million transistors, and Socket G34 platform support make it relevant only for legacy server deployments and workloads that demand many independent threads regardless of per-thread speed. Where a G34 system already exists and DDR3 ECC memory is the standard, the Opteron 6386 SE remains the drop-in flagship of that generation. Everywhere else, the data points to the Xeon W-2123.