CPU Comparison

The Intel Xeon E-2176G and the Intel Xeon E5-1680 v4 represent two distinct philosophies in workstation processing: a modern, high-frequency 6-core part against an older, wider 8-core part. Benchmark data shows a remarkably consistent outcome across every test, with the E5-1680 v4 winning all six head-to-head comparisons, albeit by a narrow margin of roughly 4%. This uniformity suggests a fundamental architectural advantage for the older chip that transcends individual workload characteristics.

Head-to-Head Benchmarks

The data tells a clear story: the E5-1680 v4 wins every single benchmark in the comparison, yet the margins are surprisingly tight given the generational gap. In Cinebench R15 multicore, the E5-1680 v4 scores 1217 against the E-2176G's 1168, a 4% advantage. The single-core R15 test follows the same pattern, with the E5-1680 v4 at 171 versus 164, also a 4% delta. This is notable because the E-2176G has a significantly higher boost clock of 4.70 GHz compared to the E5-1680 v4's 4.00 GHz, yet it still trails in single-threaded performance.

Moving to Cinebench R20, the pattern holds precisely. The multicore result shows 5073 for the E5-1680 v4 against 4867 for the E-2176G, a 4.1% margin. The single-core R20 test sees the E5-1680 v4 at 716 versus 687, again a 4.1% difference. The consistency of these deltas across both multicore and single-core tests is striking, it suggests the advantage is not workload-dependent but rather a fixed performance ceiling difference between the two designs.

Cinebench R23 confirms the trend with near-identical margins. Multicore scores are 12080 for the E5-1680 v4 and 11589 for the E-2176G, while single-core results are 1705 and 1636 respectively. Both show a 4.1% and 4% delta, respectively. In Geekbench, the E-2176G posts a multicore score of 6331 and single-core of 1573, but no comparable Geekbench numbers exist for the E5-1680 v4 in this dataset, so the direct comparison is limited to the Cinebench suite.

The average benchmark scores tell a similar story at a broader level. The E-2176G averages 3502 across all tests, while the E5-1680 v4 averages 3494, putting them within 0.2% of each other overall. This near-parity in aggregate metrics, despite the E5-1680 v4 winning every head-to-head test, indicates that the E-2176G's performance profile is more balanced across a wider range of workloads beyond the Cinebench family.

Architecture Differences

The fundamental difference lies in core count and process generation. The E5-1680 v4 packs 8 cores and 16 threads based on the Broadwell-EP architecture, manufactured on a 14 nm node with a die size of 246 mm² and 3,400 million transistors. The E-2176G, while also on 14 nm, uses the Coffee Lake architecture with a smaller 154 mm² die and no disclosed transistor count. This size difference reflects the E5-1680 v4's wider design philosophy, more cores, more cache, and a more robust memory subsystem.

Cache allocation differs substantially. Both have 64 KB of L1 and 256 KB of L2 per core, but the shared L3 cache jumps from 12 MB on the E-2176G to 20 MB on the E5-1680 v4. This 8 MB difference represents a 67% increase in last-level cache, which likely contributes to the E5-1680 v4's consistent benchmark wins despite lower clock speeds. The larger cache can hold more working set data, reducing memory latency in compute-heavy scenarios.

Memory architecture presents another clear divide. The E-2176G uses a dual-channel memory bus with 42.7 GB/s bandwidth, while the E5-1680 v4 employs a quad-channel configuration delivering 76.8 GB/s, an 80% bandwidth advantage. Both support DDR4 and ECC memory, but the E5-1680 v4's wider bus gives it a substantial throughput edge for memory-intensive applications. PCIe connectivity also favors the older chip: the E5-1680 v4 offers 40 PCIe Gen 3 lanes versus just 16 on the E-2176G, enabling more expansion options.

The E-2176G includes integrated HD Graphics P630, while the E5-1680 v4 has no integrated graphics at all. This makes the E-2176G more self-contained for basic display output, though workstation users typically rely on discrete GPUs. Sockets differ as well, with the E-2176G using Intel Socket 1151 and the E5-1680 v4 using the larger Intel Socket 2011-3, reflecting their different platform requirements.

The Verdict

The data points to the E5-1680 v4 as the superior performer in every measured benchmark, but the margins are slim, consistently around 4% across all Cinebench tests. This is a meaningful but not overwhelming advantage. The E5-1680 v4's wins come from its 8 cores versus 6, its 20 MB versus 12 MB L3 cache, and its quad-channel memory with 76.8 GB/s bandwidth versus dual-channel 42.7 GB/s. These architectural advantages more than compensate for its lower clock speeds of 3.40 GHz base and 4.00 GHz boost, compared to the E-2176G's 3.70 GHz base and 4.70 GHz boost.

However, the E-2176G is not far behind. Its average benchmark score of 3502 actually edges out the E5-1680 v4's 3494, and both sit at the 55th percentile of all CPUs. The E-2176G also draws 80W TDP versus 140W for the E5-1680 v4, a substantial power efficiency difference. The launch MSRP tells a dramatic story: the E5-1680 v4 debuted at $1723, while the E-2176G launched at $367, a fivefold price gap for a 4% performance difference in head-to-head tests.

For users prioritizing raw compute performance in multi-threaded applications, the E5-1680 v4 is the clear choice based on benchmark data alone. For those who value power efficiency, integrated graphics, and newer platform features, the E-2176G presents a compelling alternative despite its benchmark deficit. The E5-1680 v4's quad-channel memory and 40 PCIe lanes make it better suited for memory-bandwidth-hungry workloads and multi-GPU configurations.

Specification Differences

The two processors diverge on nearly every major specification. The E-2176G has 6 cores and 12 threads, while the E5-1680 v4 has 8 cores and 16 threads. Clock speeds favor the E-2176G with a 3.70 GHz base and 4.70 GHz boost, versus 3.40 GHz and 4.00 GHz on the E5-1680 v4. TDP is dramatically different: 80W for the E-2176G versus 140W for the E5-1680 v4.

Cache sizes differ at the L3 level, with 12 MB shared on the E-2176G and 20 MB shared on the E5-1680 v4. Memory bus widths are dual-channel versus quad-channel, yielding bandwidth of 42.7 GB/s and 76.8 GB/s respectively. PCIe lane counts are 16 versus 40. The E-2176G includes HD Graphics P630; the E5-1680 v4 has none. Sockets are Socket 1151 versus Socket 2011-3. Release dates are July 2018 for the E-2176G and June 2016 for the E5-1680 v4. Die sizes are 154 mm² versus 246 mm², with transistor counts of undisclosed versus 3,400 million. Launch MSRP values are $367 and $1723 respectively.

FAQ

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

A: The Intel Xeon E5-1680 v4 wins all six head-to-head benchmarks, covering Cinebench R15, R20, and R23 in both multicore and single-core tests. The E-2176G wins zero head-to-head tests.

Q: How large is the performance difference between the two in Cinebench tests?

A: The E5-1680 v4 leads by 4% to 4.1% across all Cinebench tests. Multicore deltas range from 4% in R15 to 4.1% in R20 and R23, while single-core deltas range from 4% in R15 and R23 to 4.1% in R20.

Q: What is the core and thread count difference between these processors?

A: The E-2176G has 6 cores and 12 threads, while the E5-1680 v4 has 8 cores and 16 threads. This gives the E5-1680 v4 two additional cores and four additional threads for parallel workloads.

Q: How do the memory bandwidth capabilities compare?

A: The E5-1680 v4 offers quad-channel memory with 76.8 GB/s bandwidth, while the E-2176G provides dual-channel memory with 42.7 GB/s. This represents an 80% bandwidth advantage for the E5-1680 v4.

Q: Do both processors support ECC memory?

A: Yes, both the E-2176G and the E5-1680 v4 support ECC memory. They also both support DDR4 memory, but with different channel configurations as noted above.

Q: What are the power consumption figures for each processor?

A: The E-2176G has a TDP of 80W, while the E5-1680 v4 has a TDP of 140W. The E-2176G consumes 60W less power, making it significantly more power-efficient despite its lower core count.

Where Each One Wins

The E5-1680 v4 wins in every measured benchmark category, making it the performance leader in both single-threaded and multi-threaded Cinebench workloads. Its 8-core, 16-thread configuration with 20 MB of L3 cache and quad-channel memory provides a solid foundation for heavily threaded applications such as 3D rendering, video encoding, and scientific computing. The 76.8 GB/s memory bandwidth is particularly advantageous for workloads that saturate memory throughput, while the 40 PCIe lanes support extensive I/O configurations including multiple GPUs, NVMe storage, and high-speed networking cards.

The E-2176G, despite losing all head-to-head benchmarks, has its own strengths. Its 80W TDP makes it suitable for compact workstation builds with modest cooling requirements, and the integrated HD Graphics P630 eliminates the need for a discrete GPU in basic display scenarios. The higher boost clock of 4.70 GHz provides snappy single-threaded responsiveness, and its average benchmark score of 3502 actually exceeds the E5-1680 v4's 3494, suggesting it performs better across a broader spectrum of non-Cinebench workloads. The dual-channel memory and 16 PCIe lanes are sufficient for many workstation tasks, and the Socket 1151 platform offers more motherboard choices at various form factors.

For users who prioritize maximum compute performance and have workloads that scale with cores and memory bandwidth, the E5-1680 v4 is the data-backed choice. For users who value power efficiency, integrated graphics capability, and a lower TDP that simplifies system design, the E-2176G offers a compelling balance, even though it trails in every direct benchmark comparison. The decision ultimately hinges on whether the E5-1680 v4's 4% performance advantage justifies its substantially higher power draw and platform requirements.