CPU Comparison

The Intel Xeon E-2126G and the Intel Xeon E5-4627 v3 represent two distinct approaches to server processing: a modern, high-frequency 6-core chip built on a newer process, versus a legacy 10-core, 20-thread behemoth designed for multi-socket density. The benchmark data, however, delivers a surprisingly one-sided verdict. Across every single head-to-head benchmark recorded, the older E5-4627 v3 emerges victorious, making the E-2126G's architectural advantages largely theoretical in practice. The E5-4627 v3 wins all six recorded benchmarks, with a consistent performance edge ranging from 7.7% to 8% over the E-2126G. This data suggests that in this specific matchup, raw core count and thread parallelism outweigh the benefits of newer silicon and higher clock speeds.

Head-to-Head Benchmarks

The most striking finding is the uniformity of the E5-4627 v3's victory. It does not merely win; it wins by a nearly identical margin across all tested workloads. In Cinebench R15, the E5-4627 v3 scores 971 points in the multicore test against the E-2126G's 896, a delta of -7.7% for the latter. The single-core R15 results are similarly lopsided, with the E5-4627 v3 scoring 137 versus 126, a -8% difference. This pattern repeats in Cinebench R20, where the E5-4627 v3 achieves 4049 multicore points to the E-2126G's 3734 (-7.8%), and 571 single-core points to 527 (-7.7%).

The trend holds in the most modern test suite, Cinebench R23. The E5-4627 v3 scores 9642 in multicore against 8891 for the E-2126G, and 1361 in single-core against 1255, both reflecting a -7.8% delta. The consistency of these margins is remarkable. It suggests that the performance gap is not workload-dependent but a fundamental throughput advantage. The E5-4627 v3’s 10 cores and 20 threads provide a structural edge in any parallel rendering task, while its higher single-core score indicates that even for lightly-threaded operations, its architecture executes instructions more efficiently in this benchmark environment.

Examining the broader benchmark landscape, the average benchmark score for the E-2126G is 2842, placing it in the 51st percentile of all CPUs. Its nearest rivals include the Intel Core i7-6800K (average score 2838, deltaPct 0.1) and the Intel Core i5-10600 (average score 2837, deltaPct 0.2). The E5-4627 v3, with an average benchmark score of 2789, also sits in the 51st percentile, with its closest competitor being the Intel Core i5-11300H (average score 2792, deltaPct -0.1). While the absolute average scores are close, the head-to-head data shows that in direct comparison, the E5-4627 v3 is consistently faster. The E-2126G does have a Geekbench score of 5743 multicore and 1565 single-core, but no equivalent Geekbench data exists for the E5-4627 v3 in the provided pack, preventing a direct comparison in that specific suite.

The data reveals no scenario where the E-2126G pulls ahead. Its higher boost clock of 4.50 GHz compared to the E5-4627 v3's 3.20 GHz does not translate into a single-core victory in Cinebench. This could be attributed to the IPC (instructions per clock) differences between the architectures, but the benchmark results are clear: the Haswell-EP design of the E5-4627 v3 delivers superior performance per clock in these tests. The E-2126G's only consolation is its performance relative to its own peer group, where it sits comfortably alongside other modern mid-range processors. Yet, against this specific rival, it is decisively outclassed.

FAQ

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

A: The Intel Xeon E5-4627 v3 has the higher score, achieving 1361 points compared to the Intel Xeon E-2126G's 1255, a difference of -7.8% for the latter.

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

A: The Intel Xeon E-2126G has an average benchmark score of 2842, while the Intel Xeon E5-4627 v3 has an average score of 2789. Both occupy the 51st percentile of all CPUs.

Q: How do the core and thread counts differ between the two processors?

A: The Intel Xeon E5-4627 v3 has 10 cores and 20 threads. The Intel Xeon E-2126G has 6 cores and 6 threads, lacking Hyper-Threading technology.

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

A: The Intel Xeon E5-4627 v3 supports quad-channel memory with a bandwidth of 68.3 GB/s. The Intel Xeon E-2126G supports dual-channel memory with a bandwidth of 42.7 GB/s.

Q: Does the Intel Xeon E-2126G feature integrated graphics?

A: Yes, the Intel Xeon E-2126G includes HD Graphics P630. The Intel Xeon E5-4627 v3 has no integrated graphics.

Q: In how many benchmark tests did the E5-4627 v3 outperform the E-2126G?

A: The E5-4627 v3 won all six recorded head-to-head benchmark tests, covering Cinebench R15, R20, and R23 in both single-core and multicore modes.

The Verdict

The benchmark results are unequivocal, and the choice depends entirely on the workload. For any scenario involving Cinebench rendering, the Intel Xeon E5-4627 v3 is the superior processor. It delivers a consistent 7.7% to 8% performance advantage in both single-threaded and multi-threaded tasks. The data shows no workload in which the E-2126G can match it. Its 10-core, 20-thread configuration provides a raw throughput advantage that the newer chip cannot overcome, despite its higher clock speeds. The E5-4627 v3 is the clear pick for any application that prioritizes raw compute performance, particularly in multi-threaded environments.

Conversely, the Intel Xeon E-2126G is the appropriate choice only if its specific feature set is a hard requirement. The data indicates it is slower in every measured benchmark, but it offers a newer platform with a smaller physical footprint (Socket 1151) and a significantly lower launch MSRP. Its integrated HD Graphics P630 is a feature the E5-4627 v3 lacks entirely, which could simplify system builds where a discrete GPU is unnecessary. For a server or workstation where the primary goal is maximum CPU performance, the E5-4627 v3 is the only logical choice based on this data. The E-2126G's higher base and boost clocks are not sufficient to overcome the E5-4627 v3's architectural and core-count advantages.

Specification Differences

The two processors differ substantially in their core specifications, reflecting their different design goals and eras. The Intel Xeon E-2126G features 6 cores and 6 threads, while the Intel Xeon E5-4627 v3 features 10 cores and 20 threads. The E-2126G has a base clock of 3.30 GHz and a boost clock of 4.50 GHz, significantly higher than the E5-4627 v3's 2.60 GHz base and 3.20 GHz boost. This clock speed advantage is offset by the E5-4627 v3's higher core count. Thermal design power also differs: the E-2126G has a TDP of 80 watts, while the E5-4627 v3 has a TDP of 135 watts.

The processors also use different sockets, with the E-2126G on Intel Socket 1151 and the E5-4627 v3 on Intel Socket 2011-3. Memory support differs as well: the E-2126G uses a dual-channel memory bus with a bandwidth of 42.7 GB/s, while the E5-4627 v3 uses a quad-channel bus with a bandwidth of 68.3 GB/s. The E-2126G offers 16 PCIe lanes (Gen 3), whereas the E5-4627 v3 offers 40 PCIe lanes (Gen 3). The E-2126G includes integrated HD Graphics P630, while the E5-4627 v3 has no integrated graphics. Finally, the launch MSRP for the E-2126G was $255, while the E5-4627 v3 launched at $2225.

Architecture Differences

The architectural divide between these two Xeon processors is profound. The Intel Xeon E-2126G is built on the Coffee Lake architecture, specifically the Coffee Lake-S WS codename, using a 14 nm process node. It belongs to the Xeon E-2100 series and was released in 2018. In contrast, the Intel Xeon E5-4627 v3 is based on the Haswell architecture, with the codename Haswell-EP, and uses a larger 22 nm process node. It was released in 2015. This generational gap is evident in the die size: the E-2126G has a die size of 154 mm², while the E5-4627 v3 has a much larger die of 356 mm² and contains 2,600 million transistors.

Cache hierarchies also differ. Both have 64 KB of L1 cache and 256 KB of L2 cache per core. However, the shared L3 cache differs significantly: the E-2126G has 12 MB of shared L3 cache, while the E5-4627 v3 has a larger 25 MB of shared L3 cache. This larger cache, combined with the higher core count, contributes to the E5-4627 v3's superior performance in the benchmark data. The E-2126G's advantage lies in its more modern 14 nm process, which likely contributes to its lower 80-watt TDP compared to the E5-4627 v3's 135 watts. However, in terms of raw computational throughput, the older, larger Haswell-EP design proves more effective in the tested benchmarks.