Intel Core i9-7940X vs Intel Xeon W-2175 Comparison

Head-to-Head Benchmarks

The benchmark data is unusually one-sided. Across all six recorded head-to-head tests, the Intel Core i9-7940X wins every single comparison. The Xeon W-2175 never takes a single victory, and the margins are consistent enough to suggest a pattern rather than noise.

Starting with Cinebench R15, the Core i9-7940X scores 2161 in multicore against 2010 for the Xeon W-2175, a 7.5% lead. The single-core result is similar: 305 versus 283, a 7.8% advantage. That 7.8% delta is the largest of any test in the comparison. Moving to Cinebench R20, the multicore scores are 9006 and 8379, again a 7.5% gap. The single-core scores of 1271 and 1182 also land at 7.5%. Cinebench R23 repeats the pattern: 21444 versus 19951 in multicore, and 3027 versus 2816 in single-core, both at 7.5%.

The consistency matters. Five of the six tests show exactly 7.5% separation, while only the R15 single-core test deviates slightly to 7.8%. This uniformity across different rendering workloads and different Cinebench versions indicates the performance gap is structural, not workload-dependent. The Core i9-7940X holds a steady advantage regardless of whether the test scales across all 14 cores or runs on a single thread.

There are no tests where the Xeon W-2175 closes the gap. The closest margin is the R15 single-core test at 7.8%, and the widest is also the R15 single-core test. Even the multicore results, where a server-class Xeon might be expected to show strength under sustained load, show the same 7.5% deficit. The data does not show any scenario where the Xeon pulls ahead, even temporarily.

In the broader database context, the Core i9-7940X has an average benchmark score of 6147, placing it at the 61st percentile of all CPUs. The Xeon W-2175 averages 5770, also at the 61st percentile. The percentile rankings are identical despite the 377-point gap in average scores. The Core i9-7940X sits 0.3% above the AMD EPYC 7501 (6128) and 1.4% above the AMD Ryzen Threadripper 1950X (6231). The Xeon W-2175, meanwhile, is 0.6% below the Intel Xeon E-2388G (5805) and 1.1% above the AMD EPYC 7351 (5710). The Xeon's nearest rivals are generally closer in score, while the Core i9 has a slightly wider spread among its comparison points.

Architecture Differences

Both processors are built on Intel's 14 nm process and share the same Skylake architecture family, but they diverge in codename and platform intent. The Core i9-7940X uses the Skylake-X codename and belongs to the Core i9 X-Series 7th Gen lineup. The Xeon W-2175 uses Skylake-W and belongs to the Xeon W (Skylake-W) family. Both have the same die size at 484 mm².

The core configuration is identical: 14 cores and 28 threads on both sides. Cache allocations match exactly as well. Each core gets 64 KB of L1 and 1 MB of L2, with 19.25 MB of shared L3. The memory subsystem is also the same on paper: DDR4 support, quad-channel bus, and 85.3 GB/s of memory bandwidth. The process node, die size, core count, thread count, and cache hierarchy are all identical. The differences live elsewhere.

Clock speeds differ. The Core i9-7940X runs a base clock of 3.10 GHz with a boost clock of 4.40 GHz. The Xeon W-2175 starts lower at 2.50 GHz base and boosts to 4.30 GHz. That 0.60 GHz base-clock gap and 0.10 GHz boost-clock gap explain most of the benchmark separation. Thermal design power reflects the higher clocks: the Core i9 is rated at 165 W, while the Xeon sits at 140 W. The Core i9 draws more power to sustain its clock advantage.

PCIe lane counts differ as well. The Core i9-7940X provides 44 PCIe Gen 3 lanes from the CPU. The Xeon W-2175 provides 48 PCIe Gen 3 lanes. That extra headroom matters for workstation builds with multiple expansion cards, though it does not appear in the rendering benchmarks.

ECC memory support is a major functional split. The Xeon W-2175 supports ECC memory, while the Core i9-7940X does not. For error-sensitive workloads in scientific computing or long-running server tasks, that is a decisive feature. The Core i9 counters with an unlocked multiplier; the Xeon is locked. Overclocking is possible on the Core i9 but not on the Xeon.

The market segments confirm the intent. The Core i9-7940X is classified as a Desktop part, and the Xeon W-2175 is classified as Server/Workstation. Both are end-of-life and were released within roughly six weeks of each other, the Core i9 in late August 2017 and the Xeon in mid-October 2017.

The Verdict

The data points one direction. For raw performance, the Intel Core i9-7940X is the clear winner. It holds a 7.5% advantage in five of six tests and 7.8% in the remaining one. If the goal is maximum rendering throughput or single-thread responsiveness, the Core i9 is the correct choice. The higher base and boost clocks deliver consistent wins across every Cinebench workload.

The Xeon W-2175 is not without justification, but its case rests on features, not speed. It supports ECC memory, which the Core i9 does not. It offers 48 PCIe Gen 3 lanes versus 44. It carries a lower 140 W TDP against 165 W. It is locked, so no overclocking, but that also means more predictable operation in a server environment. The Xeon is the safer pick for a workstation that must run unattended with error-correcting memory and multiple expansion devices.

The average benchmark scores reinforce the verdict. The Core i9-7940X averages 6147, and the Xeon W-2175 averages 5770. That 377-point gap is substantial. The nearest rivals for the Core i9 include the AMD EPYC 7501 at 6128 and the AMD Ryzen Threadripper 1950X at 6231, showing the Core i9 sits in a competitive desktop HEDT band. The Xeon's nearest rivals, the Intel Xeon E-2388G at 5805 and the AMD EPYC 7401P at 5814, are all within 0.8% of its score. The Xeon is average for its class; the Core i9 is slightly above average for its own.

For a builder choosing between these two on a shared Socket 2066 platform, the decision comes down to use case. If the workload benefits from ECC memory and extra PCIe lanes, the Xeon W-2175 is the only option of the two. If performance per clock and multi-threaded rendering speed matter more, the Core i9-7940X wins outright. There is no benchmark in the database where the Xeon outperforms the Core i9.

Specification Differences

The two processors share many specifications: 14 cores, 28 threads, 14 nm process, 484 mm² die size, 64 KB L1 per core, 1 MB L2 per core, 19.25 MB shared L3, DDR4 memory support, quad-channel bus, and 85.3 GB/s memory bandwidth. The differences are as follows:

• Base clock: 3.10 GHz (Core i9-7940X) versus 2.50 GHz (Xeon W-2175)
• Boost clock: 4.40 GHz (Core i9-7940X) versus 4.30 GHz (Xeon W-2175)
• TDP: 165 W (Core i9-7940X) versus 140 W (Xeon W-2175)
• PCIe lanes: 44 (Core i9-7940X) versus 48 (Xeon W-2175)
• ECC memory: not supported (Core i9-7940X) versus supported (Xeon W-2175)
• Multiplier: unlocked (Core i9-7940X) versus locked (Xeon W-2175)
• Market segment: Desktop (Core i9-7940X) versus Server/Workstation (Xeon W-2175)
• Codename: Skylake-X (Core i9-7940X) versus Skylake-W (Xeon W-2175)
• Generation: Core i9 X-Series 7th Gen (Core i9-7940X) versus Xeon W Skylake-W (Xeon W-2175)
• Launch MSRP: $1399 (Core i9-7940X) versus $1947 (Xeon W-2175)
• Release date: August 2017 (Core i9-7940X) versus October 2017 (Xeon W-2175)
• Part number: SR3RQ (Core i9-7940X) versus SR3W2 (Xeon W-2175)

FAQ

Q: Which processor is faster in multi-core rendering?

A: The Intel Core i9-7940X wins every multi-core test. In Cinebench R23 multi-core, it scores 21444 against 19951 for the Xeon W-2175, a 7.5% advantage. The R20 multi-core result is 9006 versus 8379, also 7.5%.

Q: Does the Xeon W-2175 win any benchmark?

A: No. Across all six head-to-head tests, the Core i9-7940X wins every one. The Xeon does not record a single victory in the database.

Q: Do both processors have the same core and cache configuration?

A: Yes. Both have 14 cores, 28 threads, 64 KB of L1 per core, 1 MB of L2 per core, and 19.25 MB of shared L3. The process node is 14 nm and the die size is 484 mm² for both.

Q: What is the main feature advantage of the Xeon W-2175?

A: ECC memory support. The Xeon W-2175 supports ECC memory, while the Core i9-7940X does not. The Xeon also offers 48 PCIe Gen 3 lanes versus 44 on the Core i9.

Q: Can the Core i9-7940X be overclocked?

A: Yes, the Core i9-7940X has an unlocked multiplier. The Xeon W-2175 has a locked multiplier, so it cannot be overclocked.

Q: How do the average benchmark scores compare?

A: The Core i9-7940X has an average benchmark score of 6147, while the Xeon W-2175 averages 5770. Both sit at the 61st percentile of all CPUs.

Where Each One Wins

The Core i9-7940X wins everywhere that raw compute speed matters. Its 3.10 GHz base clock and 4.40 GHz boost clock outrun the Xeon's 2.50 GHz and 4.30 GHz. Every Cinebench test, single-core or multi-core, favors the Core i9 by roughly 7.5%. Builders prioritizing rendering speed, compile times, or any workload that scales with clock frequency should pick the Core i9. The unlocked multiplier adds further headroom for users willing to overclock, though the 165 W TDP means cooling must be capable.

The Xeon W-2175 wins in specific workstation scenarios that the benchmarks do not capture. ECC memory support is the headline feature. For financial modeling, scientific simulations, or long-running server workloads where memory errors are unacceptable, the Xeon is the only one of the two that qualifies. The 48 PCIe Gen 3 lanes provide more room for GPUs, NVMe drives, and network cards in a dense workstation build. The lower 140 W TDP also makes it easier to cool in a rack or server chassis, and the locked multiplier ensures consistent, predictable operation.

The market segment labels tell the story. The Core i9-7940X is a Desktop part aimed at enthusiasts and content creators who want maximum clock speed. The Xeon W-2175 is a Server/Workstation part aimed at professionals who need reliability features like ECC and more expansion headroom. The Core i9 is the performance pick; the Xeon is the stability pick. Benchmark data only favors one side, but the full specification list shows why the Xeon still has a place in certain builds.