AMD Opteron 6348 vs Intel Xeon E3-1535M v5 Comparison

# Where Each One Wins

The benchmark data presents an unusually one-sided picture: the Intel Xeon E3-1535M v5 wins all six head-to-head Cinebench tests against the AMD Opteron 6348. But the margins are remarkably thin, ranging from just 0.7% to 1.1%. This is not a story of dominance; it is a story of near-parity achieved through wildly different design philosophies.

The Intel processor takes the single-core crown across every generation of Cinebench. In Cinebench R15 single-core, it scores 95 against the Opteron's 94, a 1.1% edge. That advantage persists in R20 (398 vs 395, 0.8%) and R23 (949 vs 942, 0.7%). For workloads that depend on per-thread responsiveness — legacy database transactions, lightly threaded engineering tools, or any application that refuses to scale beyond a couple of threads — the Xeon's higher base clock of 2.90 GHz and boost of 3.70 GHz, paired with its Skylake architecture, gives it a consistent, if modest, lead.

The multi-core picture is equally tight. The Xeon wins Cinebench R15 multi-core with 677 points versus 672 (0.7%), R20 multi-core with 2824 versus 2802 (0.8%), and R23 multi-core with 6726 versus 6672 (0.8%). Here is where the curiosity deepens: the Opteron packs 12 cores and 12 threads against the Xeon's 4 cores and 8 threads. Yet the AMD part cannot convert its core-count advantage into a win. The Xeon's per-core efficiency, enabled by its 14 nm process and Skylake architecture, overcomes a 3x core deficit. The Opteron's Piledriver architecture, built on a 32 nm process, simply cannot match the Intel core's instruction throughput.

However, the Opteron wins in raw memory bandwidth and capacity potential. It supports quad-channel DDR3 with a theoretical bandwidth of 59.7 GB/s, nearly double the Xeon's dual-channel 34.1 GB/s. For data-intensive server workloads that saturate memory buses, this bandwidth advantage could translate into real-world wins that Cinebench does not capture. Similarly, the Opteron's 12 physical cores mean it can handle more simultaneous hardware threads in virtualized environments, even if each thread is slower.

The Xeon counters with integrated HD Graphics P530, which the Opteron lacks entirely. For workstation deployments that need a display output without a discrete GPU, the Xeon is the only option. The Intel part also supports both DDR3 and DDR4 memory, offering deployment flexibility that the Opteron's DDR3-only support cannot match.

# The Verdict

The data points to a clear but nuanced verdict: the Intel Xeon E3-1535M v5 is the better processor for Cinebench-style rendering workloads, winning every benchmark by a hair. Its average benchmark score of 1945 places it at the 44th percentile of all CPUs, while the Opteron's 1930 average sits at the 43rd percentile. These are effectively equivalent positions in the overall CPU landscape, separated by rivals that include the Intel Core i7-9850HL (deltaPct of 0.2% from the Xeon) and the Intel Core i3-10300 (deltaPct of -0.2% from the Opteron).

For users whose primary metric is Cinebench performance — 3D artists, animators, or anyone running CPU-rendered frames — the Xeon wins, but the victory is so narrow (0.7% to 1.1%) that it would be imperceptible in real-world render times. A 0.8% difference in R23 multi-core means about a minute saved per two-hour render, statistically measurable but practically irrelevant.

The Opteron's case rests on factors outside Cinebench. Its quad-channel memory bus and 59.7 GB/s bandwidth make it the choice for memory-bound server workloads. Its 12 cores, while individually slower, provide more parallel hardware contexts for virtualization and heavily threaded database workloads. The Xeon's integrated graphics and dual memory technology support (DDR3 and DDR4) give it flexibility for workstation deployments.

The production timelines are telling. The Opteron launched in November 2012, the Xeon in October 2015. Both are end-of-life. But the three-year gap means the Opteron represents an older server era, while the Xeon belongs to the generation that brought 14 nm to mobile workstations. The launch MSRP of the Xeon is $623, while the Opteron launched at $575. Neither price is discussed further here, as the analysis focuses on capability, not cost.

# Head-to-Head Benchmarks

The largest margin of victory for the Intel Xeon E3-1535M v5 comes in Cinebench R15 single-core, where it scores 95 against the Opteron's 94, a 1.1% delta. This is the only test where the gap exceeds one percentage point. It suggests that the Xeon's per-thread advantage is most pronounced in the older, less parallel Cinebench R15 workload, which may have lower instruction-level parallelism and thus rewards higher clock speeds more directly.

Every other test settles into a narrow band between 0.7% and 0.8%. In Cinebench R20 multi-core, the Xeon posts 2824 versus 2802, a 0.8% edge. The R23 multi-core result shows 6726 versus 6672, also 0.8%. These consistent margins across different Cinebench versions indicate that the performance difference is architectural and stable, not an artifact of a particular benchmark version.

The single-core results across R20 (398 vs 395, 0.8%) and R23 (949 vs 942, 0.7%) show a slight erosion of the Intel advantage as the benchmark versions become more demanding. This could imply that as Cinebench increases its instruction complexity, the Opteron's Piledriver cores close the gap marginally, though never enough to overtake.

The multi-core deltas are telling in a different way. The Opteron has 12 cores to the Xeon's 4, yet it loses by 0.7% to 0.8% in all three multi-core tests. This means the Xeon's per-core multi-threaded performance is roughly 3x better than the Opteron's per-core performance, since 4 Intel cores nearly match 12 AMD cores. The efficiency gap is enormous, even if the aggregate result is nearly identical.

For perspective, the Xeon's nearest rival is the Intel Xeon E3-1230 v5 with an average score of 1947, a deltaPct of -0.1%. The Opteron's nearest rival is the Intel Core i7-1180G7 at 1930, a deltaPct of 0%. This means both processors are bracketed by modern Intel parts, and neither has a decisive edge over its closest competitors.

# FAQ

Q: Which processor wins more benchmarks in the head-to-head comparison?

A: The Intel Xeon E3-1535M v5 wins all six benchmarks, with a 6-0 record against the AMD Opteron 6348. The margins range from 0.7% to 1.1%.

Q: How much faster is the Intel Xeon E3-1535M v5 in Cinebench R23 multi-core?

A: The Xeon scores 6726 versus the Opteron's 6672, a difference of 54 points, which translates to a 0.8% advantage for the Intel part.

Q: Does the AMD Opteron 6348 have more cores, and does that help it?

A: Yes, the Opteron has 12 cores and 12 threads, while the Xeon has 4 cores and 8 threads. Despite the 3x core advantage, the Opteron loses all multi-core benchmarks by 0.7% to 0.8%, indicating its per-core performance is substantially lower.

Q: What is the memory bandwidth difference between the two processors?

A: The AMD Opteron 6348 supports quad-channel DDR3 with a theoretical bandwidth of 59.7 GB/s. The Intel Xeon E3-1535M v5 supports dual-channel DDR3 or DDR4 with 34.1 GB/s bandwidth. The Opteron has approximately 75% more memory bandwidth.

Q: Do both processors support ECC memory?

A: Yes, both the Intel Xeon E3-1535M v5 and the AMD Opteron 6348 support ECC memory, making both suitable for error-sensitive server and workstation workloads.

Q: Which processor has integrated graphics?

A: Only the Intel Xeon E3-1535M v5 has integrated graphics (HD Graphics P530). The AMD Opteron 6348 has no integrated graphics, requiring a discrete GPU for display output.

# Architecture Differences

The architectural divide between these two processors is stark. The Intel Xeon E3-1535M v5 uses the Skylake architecture (codename Skylake-H) built on a 14 nm process at Intel's foundry. It packs 2,300 million transistors into a 122 mm² die. The AMD Opteron 6348 uses the Piledriver architecture (codename Abu Dhabi) on a 32 nm process from GlobalFoundries, with 2,400 million transistors spread across two 315 mm² dies.

The transistor counts are nearly identical (2,300 million vs 2,400 million), but the Intel part achieves this in a single die less than one-fifth the combined area of the AMD's dual-die design. This density difference explains the Xeon's efficiency advantage: 14 nm transistors switching less energy and faster than 32 nm transistors.

Cache hierarchies diverge significantly. The Xeon has 64 KB of L1 cache per core and 256 KB of L2 per core, with 8 MB of shared L3. The Opteron has 576 KB of total L1 cache and 2 MB of L2 per module, with 8 MB of L3 per die (meaning 16 MB total across two dies). The Opteron's module-based design shares L2 between pairs of cores, which can create contention, while the Xeon gives each core dedicated L1 and L2.

The Xeon's Skylake architecture supports DDR3 and DDR4 memory on a dual-channel bus with 34.1 GB/s bandwidth. The Opteron's Piledriver architecture supports only DDR3 on a quad-channel bus with 59.7 GB/s bandwidth. The Opteron's memory subsystem is fundamentally wider, but the Xeon's is more modern in supporting newer memory technology.

PCIe capabilities also differ: the Xeon provides Gen 3 with 16 lanes (CPU only), while the Opteron provides Gen 2. This gives the Xeon double the per-lane bandwidth for modern expansion cards, though the Opteron's total lane count is not specified in the data.

The Xeon includes HD Graphics P530 integrated graphics, a feature entirely absent from the Opteron. For server deployments that require a display output, this is a functional differentiator. The Xeon also has 8 threads from 4 cores via Hyper-Threading, while the Opteron has 12 threads from 12 cores with no SMT.

# Specification Differences

The two processors differ across nearly every specification field. The Intel Xeon E3-1535M v5 has 4 cores and 8 threads, while the AMD Opteron 6348 has 12 cores and 12 threads. Base clocks are close: 2.90 GHz for the Xeon versus 2.80 GHz for the Opteron. Boost clocks show the Xeon at 3.70 GHz versus the Opteron's 3.40 GHz.

Thermal design power is a major differentiator: the Xeon draws 45 W, while the Opteron draws 115 W. This represents a 2.5x difference in power consumption for essentially equivalent Cinebench performance. The Xeon's socket is Intel BGA 1440, while the Opteron uses AMD Socket G34, making them physically incompatible.

The process nodes differ by generation: 14 nm for Intel versus 32 nm for AMD. The Xeon's die is 122 mm², while the Opteron's two dies are each 315 mm². Transistor counts are similar (2,300 million vs 2,400 million), but the Intel part packs them far more densely.

Memory support differs: the Xeon supports both DDR3 and DDR4, while the Opteron supports only DDR3. Memory bus width differs (dual-channel versus quad-channel), as does memory bandwidth (34.1 GB/s versus 59.7 GB/s). Both support ECC memory.

PCIe generation differs: Gen 3 for the Xeon versus Gen 2 for the Opteron. The Xeon has 16 lanes (CPU only), while the Opteron's lane count is not specified. Integrated graphics are present on the Xeon (HD Graphics P530) but absent on the Opteron.

Release dates are separated by nearly three years: the Xeon launched in October 2015, the Opteron in November 2012. Both are end-of-life. The launch MSRP was $623 for the Xeon and $575 for the Opteron. The Xeon's part number is SR2FM; the Opteron's is OS6348WKTCGHK. The Opteron belongs to the Opteron 6000 series, while the Xeon has no series designation. Neither processor has an unlocked multiplier.