AMD Opteron 6281 vs Intel Xeon E5-2608L v3 Comparison

FAQ

Q: Which processor has more physical cores?

A: The AMD Opteron 6281 has 16 cores and 16 threads, while the Intel Xeon E5-2608L v3 has 6 cores and 6 threads. Despite the large core-count advantage for AMD, the Intel part wins every benchmark in the head-to-head comparison.

Q: What is the average benchmark score difference between the two?

A: The Intel Xeon E5-2608L v3 records an average benchmark score of 1830, while the AMD Opteron 6281 averages 1789. That is a 41-point gap, roughly 2.3% higher for Intel.

Q: Which chip has the higher single-core score in Cinebench R23?

A: The Intel Xeon E5-2608L v3 scores 893 in Cinebench R23 single-core, versus 873 for the AMD Opteron 6281. Intel leads by 2.3% in that test.

Q: How do the two chips compare in memory bandwidth?

A: The Intel Xeon E5-2608L v3 supports quad-channel DDR4 with a memory bandwidth of 59.7 GB/s. The AMD Opteron 6281 supports quad-channel DDR3 with a memory bandwidth of 51.2 GB/s. Intel holds a 16.6% bandwidth advantage.

Q: What is the TDP difference?

A: The Intel Xeon E5-2608L v3 has a TDP of 52 watts, while the AMD Opteron 6281 is rated at 130 watts. The Intel chip draws substantially less power, which is notable for dense server deployments.

Q: Which processor has the higher boost clock?

A: The AMD Opteron 6281 has a boost clock of 3.20 GHz, while the Intel Xeon E5-2608L v3 lists no boost clock in the database. The AMD part also has a higher base clock at 2.50 GHz versus 2.00 GHz for Intel.

The Verdict

The data is unambiguous: the Intel Xeon E5-2608L v3 wins all six head-to-head benchmark comparisons against the AMD Opteron 6281. The Intel chip leads by margins between 2.2% and 3.4% across Cinebench R15, R20, and R23, covering both single-core and multi-core workloads. The AMD Opteron 6281 never wins a single test, despite having 16 cores versus 6, a higher base clock, and a higher boost clock.

For workloads that rely on per-thread performance, the Intel Xeon E5-2608L v3 is the clear choice. Its single-core leads range from 2.3% to 3.4%, which translates directly into better responsiveness for lightly threaded server tasks. For multi-threaded rendering, the Intel chip still leads, but the margins shrink to between 2.2% and 2.3%. The AMD Opteron 6281's 16 cores do not overcome Intel's architectural efficiency in these Cinebench workloads.

The Intel part also offers a substantially lower TDP at 52 watts versus 130 watts, making it far more attractive for power-constrained environments. The AMD chip does have a higher base clock and boost clock, but that does not translate into benchmark wins. For buyers in the server and workstation segment who prioritize measured performance and power efficiency, the Intel Xeon E5-2608L v3 is the superior option based on the recorded data.

Head-to-Head Benchmarks

The Intel Xeon E5-2608L v3 sweeps the entire benchmark suite. In Cinebench R15 multi-core, Intel scores 637 versus AMD's 623, a 2.2% lead. The single-core R15 test shows a larger gap: 90 versus 87, a 3.4% advantage for Intel.

Moving to Cinebench R20, the pattern holds. Intel scores 2658 in multi-core against AMD's 2598, a 2.3% lead. In single-core R20, Intel records 375 versus 366, a 2.5% margin. The multi-core delta remains consistent, while the single-core delta narrows slightly compared to R15.

Cinebench R23 shows the most stable results. Intel wins multi-core with 6329 against AMD's 6187, a 2.3% lead. In single-core, Intel scores 893 versus 873, again a 2.3% margin. Notably, the single-core advantage in R23 is identical in percentage terms to the multi-core advantage, which suggests the Intel architecture provides a uniform performance uplift across both scaling modes.

The largest single victory for Intel is in Cinebench R15 single-core at 3.4%. The smallest is in Cinebench R15 multi-core at 2.2%. Across all six tests, Intel's smallest winning margin is still more than 2 percentage points. The AMD Opteron 6281's 16 cores provide no multi-core advantage in these benchmarks; the Intel 6-core part consistently outperforms it.

Specification Differences

The two processors differ on nearly every major specification. The Intel Xeon E5-2608L v3 uses 6 cores and 6 threads, while the AMD Opteron 6281 uses 16 cores and 16 threads. Intel's base clock is 2.00 GHz with no boost clock listed; AMD's base clock is 2.50 GHz with a boost clock of 3.20 GHz.

TDP is a major differentiator: Intel is 52 watts, AMD is 130 watts. The Intel chip uses a 22 nm process node from Intel's own foundry, while AMD uses a 32 nm node from GlobalFoundries. Transistor counts are close: Intel lists 2,600 million transistors on a 356 mm² die, while AMD lists 2,400 million on a dual-die design of 2x 315 mm².

Cache configurations diverge significantly. Intel provides 64 KB L1 per core, 256 KB L2 per core, and 15 MB shared L3. AMD provides 768 KB L1 total, 2 MB L2 per module, and 8 MB L3 per die. Memory support also differs: Intel uses DDR4 with quad-channel bandwidth of 59.7 GB/s, while AMD uses DDR3 with quad-channel bandwidth of 51.2 GB/s. Both support ECC memory.

PCIe generation differs: Intel offers Gen 3 with 40 lanes (CPU only), while AMD offers Gen 2 with no lane count specified. Sockets are incompatible: Intel uses Socket 2011-3, AMD uses Socket G34. Release dates also differ: Intel launched in September 2014, AMD in April 2012.

Architecture Differences

The Intel Xeon E5-2608L v3 is built on the Haswell architecture, specifically the Haswell-EP codename, using a 22 nm process. This is a monolithic die design with 2,600 million transistors on a 356 mm² die. The cache hierarchy is per-core: 64 KB L1 per core, 256 KB L2 per core, and a shared 15 MB L3. This design emphasizes per-thread performance and low latency.

The AMD Opteron 6281 uses the Bulldozer architecture, codename Interlagos, on a 32 nm process from GlobalFoundries. It has a dual-die design with 2x 315 mm² dies and 2,400 million total transistors. The cache hierarchy is module-based: 768 KB L1 total, 2 MB L2 per module, and 8 MB L3 per die. Bulldozer was designed to maximize core count and throughput using shared module resources, which is why 16 cores are packed into this package.

These architectural choices explain the benchmark results. Intel's Haswell design delivers superior per-thread performance, as seen in the single-core wins of 2.3% to 3.4%. AMD's Bulldozer design, despite having more than twice the cores, cannot convert that core count into a multi-core victory. The Intel chip also benefits from newer memory technology (DDR4 versus DDR3) and a more advanced process node (22 nm versus 32 nm), both of which contribute to its performance and power efficiency advantages.

Where Each One Wins

The Intel Xeon E5-2608L v3 wins every benchmark in the database. That makes the use-case split straightforward: Intel wins all measured workloads. For single-threaded tasks such as database queries, web serving, or latency-sensitive applications, the Intel chip's single-core margins of 2.3% to 3.4% provide a measurable edge. For multi-threaded rendering or compilation workloads, Intel still leads, with multi-core margins of 2.2% to 2.3%.

The Intel chip is also the stronger choice for power-constrained environments. Its 52 watt TDP is less than half of the AMD part's 130 watt TDP. In a dense server rack, that difference compounds across many sockets, reducing cooling requirements and power delivery complexity. The Intel chip also supports DDR4 with higher memory bandwidth (59.7 GB/s versus 51.2 GB/s) and PCIe Gen 3, which are relevant for modern storage and accelerator workloads.

The AMD Opteron 6281 does have advantages that are not reflected in benchmark scores. It offers 16 cores, which may be useful for certain highly parallel workloads that do not appear in the Cinebench test suite. Its higher base clock (2.50 GHz versus 2.00 GHz) and boost clock (3.20 GHz) could benefit workloads that are not cache-sensitive. However, within the recorded benchmark data, AMD does not win a single test.

For buyers who prioritize per-thread performance, modern memory support, and power efficiency, the Intel Xeon E5-2608L v3 is the only choice between these two. For buyers who need maximum core count on a legacy AMD platform, the Opteron 6281 provides 16 cores, but the data shows those cores do not outperform Intel's 6 cores in Cinebench workloads. The verdict from the database is clear: Intel wins all six head-to-head tests, and the AMD part's only consolation is that its average score of 1789 places it in the same 42nd percentile as Intel's 1830 average.