CPU Comparison

The Intel Xeon E-2136 and Intel Xeon E5-2676 v3 are both server-class processors from Intel, yet they represent very different design philosophies and eras. The E-2136, from the Xeon E-2100 series, relies on a modern Coffee Lake architecture with a modest core count and high clock speeds. The E5-2676 v3, from the Haswell-EP generation, counters with double the cores and threads, but at significantly lower frequencies. Benchmark data from the Cinebench suite reveals that despite these profound architectural differences, the two processors deliver remarkably similar performance in both single-threaded and multi-threaded workloads, with the E-2136 holding a consistent, albeit narrow, lead across all tested metrics.

Head-to-Head Benchmarks

The benchmark results show a decisive, though numerically small, victory for the Intel Xeon E-2136. Across all six Cinebench tests, the E-2136 wins, but the margin of victory is consistently under 1.1%. In the Cinebench R15 multicore test, the E-2136 scores 1112, edging out the E5-2676 v3's 1102 by a 0.9% delta. The single-core R15 score is similarly tight, with the E-2136 at 156 and the E5-2676 v3 at 155, a 0.6% difference.

This pattern intensifies slightly in the newer Cinebench R20 suite. The multicore test shows the E-2136 scoring 4636 against the E5-2676 v3's 4592, a 1% delta. The single-core R20 results follow suit, with the E-2136's 654 outpacing the E5-2676 v3's 648 by 0.9%. The trend culminates in the Cinebench R23 tests, where the E-2136 achieves a multicore score of 11040 and a single-core score of 1558, while the E5-2676 v3 manages 10935 and 1543, respectively. Both margins in R23 are exactly 1%.

The data paints a clear picture: the E-2136 is the winner in every head-to-head comparison, but the performance gap is minimal. The largest delta is 1% in the R20 and R23 multicore tests, while the smallest is 0.6% in the R15 single-core test. This is not a case of one processor dominating another; rather, it is a near-tie, where the E-2136's higher clock speeds just barely compensate for the E5-2676 v3's substantial core-count advantage. The average benchmark score for the E-2136 is 3193, compared to 3163 for the E5-2676 v3, a difference of only about 1%.

Where Each One Wins

Given the data, the "wins" for each processor are defined by narrow margins, but they do point to distinct use-case strengths. The Intel Xeon E-2136 wins all six benchmarks, so on paper it is the faster chip in every scenario tested. However, the nature of its wins matters. Its biggest victories come in the multicore tests (1% in R20 and R23) and the R15 multicore test (0.9%). This suggests that even in heavily threaded workloads, where the E5-2676 v3 has a theoretical advantage from its 12 cores versus 6, the E-2136's higher base and boost clocks (3.30 GHz and 4.50 GHz versus 2.40 GHz and 3.00 GHz) are sufficient to overcome the core deficit.

Conversely, the E5-2676 v3's performance is best characterized as a near-miss. It loses, but by the slimmest of margins. Its largest losses are the same 1% deltas, meaning it is nearly as capable in the same multi-threaded workloads. Where the E5-2676 v3 might be considered to "win" is in its capacity for handling concurrent memory transactions or more PCIe devices, but the benchmark data does not cover those areas. From a pure Cinebench perspective, the E-2136 is the clear, if marginal, winner. The E5-2676 v3 has zero wins in the head-to-head table, but its proximity in scores indicates that for many applications, the difference between the two would be imperceptible to the end user.

FAQ

Q: Which processor has a higher multi-core score in Cinebench R23?

A: The Intel Xeon E-2136 has a higher multicore score of 11040, while the Intel Xeon E5-2676 v3 scores 10935, a 1% difference.

Q: How do the single-core scores compare in Cinebench R15?

A: The Intel Xeon E-2136 scores 156, and the Intel Xeon E5-2676 v3 scores 155, giving the E-2136 a 0.6% advantage.

Q: What is the total number of benchmark wins for each processor?

A: The Intel Xeon E-2136 wins all 6 head-to-head benchmarks, while the Intel Xeon E5-2676 v3 wins 0.

Q: What is the average benchmark score for each processor?

A: The Intel Xeon E-2136 has an average benchmark score of 3193, and the Intel Xeon E5-2676 v3 has an average benchmark score of 3163.

Q: Which processor has a higher core count?

A: The Intel Xeon E5-2676 v3 has 12 cores and 24 threads, while the Intel Xeon E-2136 has 6 cores and 12 threads.

Q: In which benchmark does the Intel Xeon E-2136 have its largest lead?

A: The largest lead is a 1% delta, seen in the Cinebench R20 multicore and Cinebench R23 multicore and single-core tests.

Specification Differences

The specification sheets for these two CPUs reveal stark differences that explain their benchmark performance. The most obvious divergence is in core and thread counts: the Intel Xeon E5-2676 v3 offers 12 cores and 24 threads, exactly double the 6 cores and 12 threads of the Intel Xeon E-2136. Clock speeds are also inverted, with the E-2136 running at a base of 3.30 GHz and a boost of 4.50 GHz, compared to the E5-2676 v3's much lower 2.40 GHz base and 3.00 GHz boost.

The thermal design power (TDP) reflects this, with the E-2136 at 80 watts and the E5-2676 v3 at 120 watts. The sockets are incompatible: the E-2136 uses Intel Socket 1151, while the E5-2676 v3 uses the larger Intel Socket 2011-3. Memory support differs, as the E-2136 supports DDR4 only with a dual-channel bus and 42.7 GB/s bandwidth, while the E5-2676 v3 supports both DDR3 and DDR4 with a quad-channel bus and a higher 68.3 GB/s bandwidth. The E5-2676 v3 also provides more PCIe lanes (40 versus 16), both Gen 3. Additionally, the E-2136 includes integrated UHD Graphics P630, whereas the E5-2676 v3 has no integrated graphics. The launch MSRP for the E-2136 is $289; no launch MSRP is available for the E5-2676 v3.

Architecture Differences

These two processors come from different architectural generations and were fabricated on different process nodes. The Intel Xeon E-2136 is based on the Coffee Lake architecture, specifically the Coffee Lake-S WS codename, and is built on a 14 nm process with a die size of 154 mm². In contrast, the Intel Xeon E5-2676 v3 uses the older Haswell architecture (codename Haswell-EP) and is built on a larger 22 nm process, resulting in a significantly bigger die size of 356 mm². The Haswell chip also integrates 2,600 million transistors, a figure not listed for the Coffee Lake part.

Cache hierarchies also differ. Both have identical L1 and L2 caches per core (64 KB and 256 KB, respectively), but the shared L3 cache is much larger on the E5-2676 v3 at 30 MB, compared to 12 MB on the E-2136. This larger cache likely helps the E5-2676 v3 compensate for its lower clock speeds in multi-threaded workloads. The E-2136 features the newer Coffee Lake architecture, which offers higher instructions per clock (IPC) compared to Haswell, explaining its ability to match or slightly exceed the E5-2676 v3 despite having half the cores. Both support ECC memory, but the E5-2676 v3 supports older DDR3 alongside DDR4, while the E-2136 is limited to DDR4.

The Verdict

The data dictates a clear, though not overwhelming, choice. The Intel Xeon E-2136 is the superior processor in every benchmark recorded, winning all six head-to-head comparisons. Its advantage in single-core performance (0.6% to 1% deltas) is expected given its much higher boost clock of 4.50 GHz versus 3.00 GHz. However, its victory in multi-core tests is more surprising, as it manages to outpace a chip with double the cores and threads. This is attributable to the newer Coffee Lake architecture's higher IPC and the significant clock speed advantage, which together offset the core deficit.

The Intel Xeon E5-2676 v3 is not a poor performer; it is simply outclassed by a newer design. Its 12 cores and 24 threads provide ample parallel processing capability, and its larger 30 MB L3 cache and quad-channel memory bus (68.3 GB/s) offer more memory bandwidth than the E-2136's dual-channel setup (42.7 GB/s). For workloads that are heavily dependent on memory throughput or that can utilize more than 6 cores without being limited by single-thread speed, the E5-2676 v3 could be a viable consideration. However, based solely on the Cinebench scores, the E-2136 is the faster chip in both single-threaded and multi-threaded rendering tasks.

Therefore, the recommendation from the data is straightforward: choose the Intel Xeon E-2136 for its consistent performance lead, lower TDP of 80 watts, and modern architecture. Choose the Intel Xeon E5-2676 v3 only if the specific platform requirements demand the Socket 2011-3 interface, support for DDR3 memory, or a significantly higher number of PCIe lanes (40 versus 16), as its benchmark scores are nearly identical but slightly lower. The E-2136 is the safer pick for raw compute performance, while the E5-2676 v3 offers more expansion and memory bandwidth potential, albeit with a higher power draw and slower clocks.