CPU Comparison

The Intel Xeon E-2378G and the Intel Core i9-7900X are two very different CPUs that land in the same performance tier, but the data shows a clear, consistent winner in every measured benchmark. The Xeon E-2378G sweeps all six head-to-head comparisons, albeit by narrow margins, while the Core i9-7900X counters with a higher core count and a much wider memory bus. This is a contest where the newer architecture of the Xeon edges out the older, core-heavy design of the i9 in raw compute, but the i9 retains advantages in platform-level capabilities that the benchmark scores do not capture.

Head-to-Head Benchmarks

The benchmark results are unambiguous: the Intel Xeon E-2378G wins every single Cinebench test in the comparison, from R15 through R23, in both single-core and multi-core workloads. The margins are consistent, ranging from 1.6% to 1.7%, which indicates that the Xeon's advantage is not tied to a specific workload type but rather a fundamental per-thread efficiency gain. In Cinebench R23 multi-core, the Xeon scores 17974 against the i9-7900X's 17680, a 1.7% lead that is impressive given the i9 has 10 cores and 20 threads versus the Xeon's 8 cores and 16 threads. The single-core results tell a similar story, with the Xeon scoring 2537 in R23 single-core versus 2496 for the i9, a 1.6% advantage that points to the Xeon's higher boost clock of 5.10 GHz against the i9's 4.50 GHz.

Looking at the older Cinebench R15 tests, the pattern holds. The Xeon posts 1811 in multi-core against the i9's 1782, and 255 in single-core against 251. The R20 results are equally consistent: 7549 versus 7425 in multi-core, and 1065 versus 1048 in single-core. All six deltas land between 1.6% and 1.7%, which is a remarkably tight spread for two processors from different generations and market segments. Notably, the i9-7900X also has a Geekbench score listed in its benchmark array, 8841 multi-core and 1437 single-core, but there is no corresponding Geekbench result for the Xeon in the head-to-head data, so that test cannot be compared directly. The overall average benchmark scores reinforce the closeness of this matchup: the Xeon averages 5199, while the i9 averages 5120, a difference of 79 points. Both processors sit at the 60th percentile of all CPUs, meaning they are statistically peers in the broader market, even though the head-to-head data favors the Xeon in every available test.

Architecture Differences

The two chips represent fundamentally different design philosophies from Intel. The Xeon E-2378G is built on the Rocket Lake architecture (codename Rocket Lake-E) and belongs to the Xeon E-2300 series, targeted at the server and workstation segment. The Core i9-7900X uses the older Skylake architecture (codename Skylake-X) and is part of the Core i9 X-Series 7th Gen, aimed at the desktop enthusiast market. Both are manufactured on Intel's 14 nm process, but the similarities end there. The Xeon uses 8 cores and 16 threads, while the i9 uses 10 cores and 20 threads, giving the i9 a raw 25% advantage in core count. However, the Xeon compensates with a significantly higher boost clock: 5.10 GHz versus the i9's 4.50 GHz, and a higher base clock of 2.80 GHz versus 3.30 GHz.

The cache hierarchies also differ considerably. The Xeon features 80 KB of L1 cache per core and 512 KB of L2 per core, with 16 MB of shared L3 cache. The i9 has 64 KB of L1 per core and a much larger 1 MB of L2 per core, but only 14 MB of shared L3. This means the i9 has more total L2 cache (10 MB versus 4 MB) but less L3, and the Xeon's larger L1 per core suggests a more efficient per-thread data path. Memory support is another major divergence: the Xeon uses dual-channel DDR4 with a memory bandwidth of 51.2 GB/s, while the i9 uses quad-channel DDR4 with a much higher bandwidth of 85.3 GB/s. The i9 also offers 44 PCIe Gen 3 lanes (CPU only), versus the Xeon's 20 PCIe Gen 4 lanes (CPU only), a trade-off between lane count and lane speed. The Xeon supports ECC memory and includes integrated UHD Graphics P750, while the i9 has no integrated graphics and does not support ECC. The i9 has an unlocked multiplier, whereas the Xeon is locked. The platforms are incompatible: the Xeon uses Intel Socket 1200, while the i9 uses Intel Socket 2066.

Where Each One Wins

The Xeon E-2378G wins in every benchmark that was measured, so the performance crown belongs to it across all Cinebench workloads. Its 1.6-1.7% lead in multi-core tests is notable because it achieves this with two fewer cores and four fewer threads, which means its per-core efficiency is substantially higher. In single-core tests, the Xeon's 5.10 GHz boost clock gives it a clear edge over the i9's 4.50 GHz, and this advantage is consistent at 1.6% across all three Cinebench versions. For workloads that are sensitive to single-thread performance, such as legacy applications, scripting, or lightly threaded tasks, the Xeon is the better choice based on the data. For multi-threaded rendering workloads, the Xeon still wins, but the margin is tight enough that the i9's 10 cores might be preferable in a system that can leverage its higher memory bandwidth.

The i9-7900X, despite losing all head-to-head benchmarks, has structural advantages that are not reflected in Cinebench scores. Its quad-channel memory bus at 85.3 GB/s is 67% wider than the Xeon's dual-channel 51.2 GB/s, which could benefit memory-intensive workloads like large database operations or in-memory analytics, though no benchmark data in the pack verifies this. The i9 also has 44 PCIe Gen 3 lanes versus the Xeon's 20 Gen 4 lanes, which means the i9 can support more expansion cards (e.g., multiple GPUs or NVMe adapters) at Gen 3 speeds, whereas the Xeon offers fewer lanes but at Gen 4 speeds. The i9's unlocked multiplier is a plus for overclocking, and its larger L2 cache (1 MB per core) may help in certain repetitive workloads. The i9 also has a Geekbench score (8841 multi-core, 1437 single-core) that the Xeon lacks, but since no Xeon Geekbench result is provided, this cannot be used to draw a comparative conclusion.

The Verdict

The data is clear: the Intel Xeon E-2378G is the faster processor in every benchmark that was run, and it should be the choice for anyone prioritizing raw Cinebench performance. Its 1.6-1.7% lead across single-core and multi-core tests is small but consistent, and it achieves this with lower TDP (80 W versus 140 W) and a more modern architecture. The Xeon also brings ECC memory support and integrated graphics, which are valuable for server or workstation deployments where reliability and basic display output are required. The Xeon's active production status, versus the i9's end-of-life status, means it is the more future-proof option in terms of availability and software optimization.

However, the Core i9-7900X is not without its reasons to exist. Its 10 cores and 20 threads, combined with quad-channel memory at 85.3 GB/s, make it a compelling choice for a desktop system that needs maximum memory bandwidth and expansion capability. The 44 PCIe Gen 3 lanes are a significant advantage for multi-GPU setups or heavy I/O configurations. If a user is building a high-end desktop workstation and values overclocking (via the unlocked multiplier) and memory throughput over the Xeon's per-core efficiency, the i9 is the sensible pick. But the benchmark data, taken strictly on compute performance, favors the Xeon in all six measured tests. The i9's lower average benchmark score (5120 versus 5199) and identical 60th percentile ranking suggest that, in the broader CPU market, these two are peers, but the Xeon is the marginally stronger one in the tests that were run.

FAQ

Q: Which CPU has a higher boost clock?

A: The Intel Xeon E-2378G has a boost clock of 5.10 GHz, while the Intel Core i9-7900X has a boost clock of 4.50 GHz.

Q: How many cores and threads does each processor have?

A: The Xeon E-2378G has 8 cores and 16 threads. The Core i9-7900X has 10 cores and 20 threads.

Q: Does the Xeon E-2378G support ECC memory?

A: Yes, the Xeon E-2378G supports ECC memory. The Core i9-7900X does not support ECC memory.

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

A: The Xeon E-2378G has a dual-channel memory bus with 51.2 GB/s bandwidth. The Core i9-7900X has a quad-channel memory bus with 85.3 GB/s bandwidth.

Q: Which CPU has integrated graphics?

A: The Intel Xeon E-2378G includes integrated UHD Graphics P750. The Intel Core i9-7900X has no integrated graphics.

Q: What are the Cinebench R23 multi-core scores for each?

A: The Xeon E-2378G scores 17974 in Cinebench R23 multi-core, while the Core i9-7900X scores 17680, a 1.7% difference in favor of the Xeon.

Specification Differences

| Specification | Intel Xeon E-2378G | Intel Core i9-7900X |

|----------------|---------------------|----------------------|

| Cores | 8 | 10 |

| Threads | 16 | 20 |

| Base Clock | 2.80 GHz | 3.30 GHz |

| Boost Clock | 5.10 GHz | 4.50 GHz |

| TDP | 80 W | 140 W |

| Socket | Intel Socket 1200 | Intel Socket 2066 |

| Architecture | Rocket Lake | Skylake |

| Codename | Rocket Lake-E | Skylake-X |

| L1 Cache | 80 KB (per core) | 64 KB (per core) |

| L2 Cache | 512 KB (per core) | 1 MB (per core) |

| L3 Cache | 16 MB (shared) | 14 MB (shared) |

| Memory Bus | Dual-channel | Quad-channel |

| Memory Bandwidth | 51.2 GB/s | 85.3 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 4, 20 Lanes (CPU only) | Gen 3, 44 Lanes (CPU only) |

| Integrated Graphics | UHD Graphics P750 | None |

| Market Segment | Server/Workstation | Desktop |

| Production Status | Active | End-of-life |

| Release Date | 2021-09-07 | 2017-06-25 |

| Launch MSRP | $494 | $999 |

| Multiplier Unlocked | No | Yes |