CPU Comparison

The AMD Opteron 6380 and the Intel Xeon E5-2623 v3 are both end-of-life server processors, but they represent radically different design philosophies from their respective generations. The data shows the AMD part, a 16-core Piledriver monster, and the Intel part, a 4-core Haswell chip, end up with nearly identical average benchmark scores (1643 vs 1630). This near-parity is the central story here: the Opteron wins every single head-to-head Cinebench test in the FACT PACK, but by such a narrow margin (0.7% to 1.3%) that the architectural gulf between them is effectively neutralized in these specific workloads.

The Verdict

The benchmark results indicate a statistical tie, but the underlying hardware tells two different stories. The AMD Opteron 6380 wins all six head-to-head comparisons included in the data, yet its largest victory is a 1.3% lead in Cinebench R15 single-core. The Intel Xeon E5-2623 v3, despite losing every match, sits just 0.8% behind in the average benchmark score (1630 vs 1643). For a workload that is purely multi-threaded, the Opteron’s 16 cores versus the Xeon’s 4 cores should theoretically produce a massive gap, but the data shows only a 0.7% difference in Cinebench R15 multi-core (572 vs 568). This suggests the Opteron’s Piledriver architecture is far less efficient per clock, and the Xeon’s higher base clock (3.00 GHz vs 2.50 GHz) plus superior instruction handling closes the core-count chasm.

The data implies the choice depends on the specific software environment. If the target workload is heavily dependent on raw core count, the Opteron 6380’s 16 threads might offer headroom that the Xeon’s 8 threads cannot match in non-Cinebench scenarios. However, the Xeon E5-2623 v3 offers newer platform features that could be decisive. The Opteron was released in 2012, while the Xeon arrived in 2014, and the Xeon’s memory support is DDR4 versus the Opteron’s DDR3. For a system builder looking at the data alone, the Xeon’s newer socket (Socket 2011-3) and PCIe Gen 3 support (40 lanes) versus the Opteron’s Gen 2 make it the more future-proof option, despite the Opteron’s slight benchmark edge. The verdict from the numbers is clear: the Opteron wins on paper, the Xeon wins on platform modernity, and neither offers a compelling performance advantage over the other in the Cinebench suite.

Architecture Differences

The most glaring difference is in core and thread counts. The AMD Opteron 6380 packs 16 cores and 16 threads, while the Intel Xeon E5-2623 v3 has just 4 cores and 8 threads. This is a 4x core advantage for AMD, yet the performance data shows no corresponding benefit. The Opteron is built on the Piledriver architecture (codename Abu Dhabi) using a 32 nm process from GlobalFoundries, while the Xeon uses the Haswell architecture (codename Haswell-EP) on Intel’s 22 nm process. The transistor counts are similar (2,400 million vs 2,600 million), but the die layout differs significantly: AMD uses a dual-die design (2x 315 mm²), whereas Intel uses a single monolithic die (356 mm²).

Cache hierarchies are also fundamentally different. The Opteron has an L1 cache of 768 KB and an L2 cache of 2 MB per module, with 8 MB of L3 per die. The Xeon has 64 KB of L1 per core, 256 KB of L2 per core, and 10 MB of shared L3. The Xeon’s per-core L2 allocation (256 KB per core) is more generous than the Opteron’s module-based approach, which may explain why the Xeon’s single-core scores are nearly identical despite having fewer physical cores. The Opteron’s base clock of 2.50 GHz and boost clock of 3.40 GHz are lower than the Xeon’s 3.00 GHz base and 3.50 GHz boost. Both processors support ECC memory and quad-channel memory buses, but the Opteron uses DDR3 while the Xeon uses DDR4. Interestingly, the memory bandwidth figures are identical at 59.7 GB/s for both, indicating that the DDR4 advantage is not realized in this metric within the FACT PACK data.

FAQ

Q: Which processor has more cores?

A: The AMD Opteron 6380 has 16 cores and 16 threads, while the Intel Xeon E5-2623 v3 has 4 cores and 8 threads. The Opteron has a 4x core advantage.

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

A: The Opteron 6380 scores 5683, and the Xeon E5-2623 v3 scores 5637. The Opteron leads by 0.8%, a difference of just 46 points.

Q: Which processor supports newer memory technology?

A: The Intel Xeon E5-2623 v3 supports DDR4 memory, while the AMD Opteron 6380 supports DDR3. Both have quad-channel memory buses with identical bandwidth figures of 59.7 GB/s.

Q: Are these processors still in production?

A: No. Both the AMD Opteron 6380 and the Intel Xeon E5-2623 v3 are marked as "End-of-life" in the production status field.

Q: How do their average benchmark scores compare?

A: The Opteron 6380 has an average benchmark score of 1643, and the Xeon E5-2623 v3 has an average score of 1630. The Opteron is 0.8% higher, but both sit in the 39th and 40th percentile of all CPUs, respectively.

Q: What is the difference in PCIe support?

A: The Opteron 6380 uses PCIe Gen 2, while the Xeon E5-2623 v3 uses PCIe Gen 3 with 40 lanes (CPU only). This is a significant platform advantage for the Intel part.

Specification Differences

The two processors differ across nearly every major specification category. The Opteron 6380 has 16 cores and 16 threads versus the Xeon’s 4 cores and 8 threads. The base clock is 2.50 GHz for AMD and 3.00 GHz for Intel, with boost clocks of 3.40 GHz and 3.50 GHz, respectively. The TDP is 115 watts for the Opteron and 105 watts for the Xeon. The sockets are entirely incompatible: AMD Socket G34 versus Intel Socket 2011-3. The process nodes differ (32 nm vs 22 nm), as do the foundries (GlobalFoundries vs Intel). The cache configurations are distinct: the Opteron has 768 KB of L1 and 2 MB of L2 per module, while the Xeon has 64 KB of L1 per core and 256 KB of L2 per core. The L3 cache is 8 MB per die for AMD and 10 MB shared for Intel. Memory support differs with DDR3 on the AMD side and DDR4 on the Intel side, though both have quad-channel buses and 59.7 GB/s bandwidth. The PCIe support is Gen 2 for AMD and Gen 3 with 40 lanes for Intel. The release dates are about two years apart (2012 for AMD, 2014 for Intel). The launch MSRP is $1088 for the Opteron and $444 for the Xeon. The die sizes are 2x 315 mm² for AMD versus 356 mm² for Intel, with transistor counts of 2,400 million and 2,600 million, respectively.

Head-to-Head Benchmarks

The head-to-head data shows a clean sweep for the AMD Opteron 6380, but the margins are remarkably thin. In Cinebench R15 multi-core, the Opteron scores 572 against the Xeon’s 568, a 0.7% lead. The single-core test is closer in relative terms but still favors AMD: 80 vs 79, a 1.3% delta. Moving to Cinebench R20, the multi-core result is 2386 for AMD versus 2367 for Intel, a 0.8% difference. The single-core R20 test shows 336 vs 333, a 0.9% margin. The newest workload, Cinebench R23, shows the same pattern: multi-core is 5683 vs 5637 (0.8% lead for AMD), and single-core is 802 vs 795 (0.9% lead for AMD). Across all six tests, the Opteron’s largest winning margin is just 1.3% in R15 single-core, and its smallest is 0.7% in R15 multi-core.

The data suggests that the Opteron’s 16-core design provides a marginal advantage in these specific rendering workloads, but the Xeon’s per-core efficiency nearly compensates for its 12-core deficit. The Xeon’s higher base clock (3.00 GHz vs 2.50 GHz) and newer architecture likely explain why the multi-core gap is not larger. For context, the Opteron’s nearest rival is the Intel Core i7-5700HQ with an average score of 1645, a delta of -0.1%, while the Xeon’s nearest rival is the Intel Core i7-8560U at 1631, a delta of -0.1%. Both processors are effectively in the same performance tier as a mid-range mobile processor from a later generation, which underscores how close their overall capabilities are.

Where Each One Wins

The AMD Opteron 6380 wins every benchmark in the head-to-head data, so it holds an advantage in all Cinebench R15, R20, and R23 tests, both multi-core and single-core. The largest win is in Cinebench R15 single-core (1.3% ahead), and the smallest is in R15 multi-core (0.7% ahead). For workloads that are purely CPU-bound and similar to Cinebench’s rendering engine, the Opteron is the nominal winner, but the margins are so small that they would be imperceptible in real-world use. The Opteron also has a theoretical advantage in raw core count, which could benefit highly parallel workloads that are not represented in the FACT PACK’s benchmark suite.

The Intel Xeon E5-2623 v3 does not win any of the six head-to-head benchmarks, but its strengths lie in platform features rather than raw Cinebench scores. The Xeon supports DDR4 memory and PCIe Gen 3 with 40 lanes, whereas the Opteron is limited to DDR3 and PCIe Gen 2. The Xeon’s newer release date (2014 vs 2012) and smaller process node (22 nm vs 32 nm) suggest better power efficiency per operation, as evidenced by its lower TDP (105 watts vs 115 watts) despite having a higher base clock. The Xeon’s per-core cache allocation (256 KB L2 per core) is also more generous, which could translate to better performance in latency-sensitive applications. The data shows the Xeon’s average benchmark score is only 0.8% lower than the Opteron’s, so in any workload where the platform advantages (DDR4, PCIe Gen 3) come into play, the Xeon would be the stronger choice. The Opteron wins the benchmark war, but the Xeon wins the platform war, and the data does not support a decisive victory for either in general-purpose server tasks.