Intel Core i7-9800X vs Intel Xeon W-2140B Comparison

Head-to-Head Benchmarks

The recorded data shows a clean sweep for the Intel Core i7-9800X across every benchmark in the comparison set. The Xeon W-2140B does not post a single victory in any of the eight head-to-head tests, but the margins are not uniform. The largest gap appears in Geekbench single-core, where the i7-9800X scores 1398 against the Xeon's 1299, a delta of 7.6%. That is the widest advantage anywhere in the comparison and points to a meaningful difference in lightly threaded performance.

The Cinebench suite tells a consistent story. In Cinebench R15 multi-core, the i7-9800X scores 1553 versus 1480 for the Xeon, a 4.9% lead. The single-core result in the same test is 219 against 209, a 4.8% margin. Moving to Cinebench R20, the multi-core gap remains at 4.9% (6474 versus 6170), and single-core again sits at 4.8% (913 versus 871). Cinebench R23 repeats the pattern: multi-core 15416 versus 14692 (4.9%), single-core 2176 versus 2074 (4.9%). The consistency of these deltas across three Cinebench versions suggests the performance difference scales evenly with the workload, rather than favoring one specific rendering task.

Geekbench multi-core is the closest contest. The i7-9800X posts 7488, while the Xeon W-2140B reaches 7381, a delta of just 1.4%. This narrower margin indicates that in some all-core workloads, the two processors are nearly equivalent. The single-core Geekbench result, however, contradicts that closeness with the 7.6% gap already noted. So the data shows a processor that is broadly faster, with the advantage most pronounced when the workload relies on a single thread.

The aggregate scores reflect this overall positioning. The i7-9800X carries an average benchmark score of 4455, placing it at the 58th percentile across all CPUs. The Xeon W-2140B averages 4272, also at the 58th percentile. Both sit in the same percentile band, but the raw average score difference is 183 points in favor of the i7-9800X. The nearest rival data for each confirms they occupy similar territory: the i7-9800X's closest competitor, the AMD Ryzen 5 PRO 5650GE, averages 4470 (a -0.3% delta), while the Xeon's nearest rival, the Intel Xeon E5-4669 v3, averages 4285 (also -0.3% delta). Both chips are squarely mid-pack in the broader CPU landscape, but the i7-9800X sits slightly higher in raw terms.

Where Each One Wins

The i7-9800X wins every benchmark in the head-to-head set, so the question of "where each one wins" is really about which workloads show the biggest or smallest margins. The strongest case for the i7-9800X is single-threaded performance. The Geekbench single-core delta of 7.6% is the standout figure, and the Cinebench single-core deltas hover near 4.8% to 4.9%. For users running legacy software, spreadsheet-heavy tasks, or any application that does not scale across cores, the i7-9800X offers a measurable advantage.

For multi-threaded rendering, the i7-9800X still leads, but the gap narrows. The Cinebench multi-core deltas are all 4.9%, which is a consistent but modest edge. The Geekbench multi-core delta drops to 1.4%, meaning in certain all-core workloads the Xeon W-2140B is nearly on par. This suggests the Xeon's lower clock speeds are partially compensated by its architecture in parallel tasks, though not enough to overcome the i7-9800X.

The Xeon W-2140B, despite losing every benchmark, has attributes that matter outside raw scores. It supports ECC memory, a feature absent on the i7-9800X. It also carries a higher PCIe lane count (48 lanes versus 44) and a lower TDP (120 watts versus 165 watts). For a workstation environment where error-correcting memory and long-term stability under sustained load are priorities, the Xeon's value proposition is not captured by the benchmark deltas alone. The benchmarks show the i7-9800X is faster, but the Xeon offers platform features that the i7-9800X cannot match.

FAQ

Q: Which processor is faster in single-core workloads?

A: The Intel Core i7-9800X leads in every single-core benchmark. The margin ranges from 4.8% in Cinebench R15 and R20 to 7.6% in Geekbench single-core.

Q: How much slower is the Xeon W-2140B in multi-core rendering?

A: In Cinebench R23 multi-core, the Xeon scores 14692 against the i7-9800X's 15416, a 4.9% deficit. The same 4.9% gap appears in Cinebench R15 and R20 multi-core tests.

Q: Is there any benchmark where the Xeon W-2140B comes close to the i7-9800X?

A: Yes, in Geekbench multi-core the Xeon scores 7381 versus 7488, a delta of only 1.4%. It is the closest result in the entire comparison.

Q: Do both processors support the same memory configuration?

A: Both use DDR4 memory with a quad-channel bus and identical peak bandwidth of 85.3 GB/s. The key difference is ECC support: the Xeon W-2140B supports ECC memory, while the i7-9800X does not.

Q: What is the average benchmark score difference between the two?

A: The i7-9800X averages 4455 across all benchmarks, while the Xeon W-2140B averages 4272. That is a difference of 183 points in favor of the i7-9800X.

Q: Are both processors in the same performance percentile?

A: Yes, both sit at the 58th percentile when compared against all CPUs in the database. Their nearest rivals are also closely matched in aggregate score.

Specification Differences

The two processors share several core specifications but diverge on clock speeds, power, and platform features. Both have 8 cores and 16 threads. The i7-9800X runs a base clock of 3.80 GHz with a boost clock of 4.50 GHz. The Xeon W-2140B runs lower, at 3.20 GHz base and 4.20 GHz boost. This clock gap explains the consistent single-core advantage seen in the benchmarks.

Thermal design power differs substantially. The i7-9800X is rated at 165 watts, while the Xeon W-2140B draws 120 watts. The lower TDP of the Xeon likely contributes to its narrower multi-core deficit, as it may sustain a more consistent power envelope under load. The i7-9800X has an unlocked multiplier; the Xeon is locked.

Memory support shows a critical split. Both use DDR4 with quad-channel access and 85.3 GB/s bandwidth, but ECC memory is supported only on the Xeon W-2140B. The i7-9800X does not support ECC. PCIe lane counts also differ: the i7-9800X provides 44 lanes of PCIe Gen 3, while the Xeon W-2140B provides 48 lanes. The Xeon's die size is listed at 484 mm², while no die size is recorded for the i7-9800X.

The market segments reflect their intended use. The i7-9800X is classified as a desktop part, launched on 2018-10-18 with a launch MSRP of $589. The Xeon W-2140B is classified as a server/workstation part, launched on 2017-12-20 with no launch MSRP recorded. Both are end-of-life products and use the same Intel Socket 2066.

Architecture Differences

Both processors are built on Intel's 14 nm process and share the Skylake architecture family, but they come from different sub-families. The i7-9800X uses the Skylake-X codename, part of the Core i7 X-Series 9th Generation. The Xeon W-2140B uses the Skylake-W codename, part of the Xeon W line. The foundry for both is Intel.

Cache configurations differ. Both have 64 KB of L1 cache per core and 1 MB of L2 cache per core. The shared L3 cache, however, is not equal: the i7-9800X has 16.5 MB shared, while the Xeon W-2140B has 11 MB shared. That is a 5.5 MB difference in favor of the i7-9800X, which likely contributes to its better single-threaded performance, particularly in the Geekbench single-core test.

Neither processor includes integrated graphics. Both rely on discrete GPUs. The i7-9800X is unlocked for overclocking, while the Xeon is not. The Xeon's ECC memory support and higher PCIe lane count point toward a workstation-oriented architecture, while the i7-9800X's larger L3 cache and higher clocks target desktop enthusiasts.

The part numbers differ, with the i7-9800X carrying SREZ9 and the Xeon W-2140B carrying SR3LK. The production status for both is end-of-life, and both have been on the market long enough that their architectural lineage is well established in the database.

The Verdict

The benchmark data is unambiguous: the Intel Core i7-9800X is the faster processor in every measured test. It wins all eight head-to-head comparisons, with deltas ranging from 1.4% in Geekbench multi-core to 7.6% in Geekbench single-core. For users who prioritize raw performance, particularly in single-threaded applications, the i7-9800X is the clear choice. Its higher base and boost clocks, larger L3 cache, and unlocked multiplier all contribute to this outcome.

The Xeon W-2140B, however, is not without merit. It offers ECC memory support, which the i7-9800X lacks, and it provides 48 PCIe lanes versus 44. Its lower TDP of 120 watts makes it a more power-efficient option, and its 1.4% multi-core deficit in Geekbench shows it can keep pace in certain parallel workloads. For a workstation that demands error-correcting memory and sustained reliability over raw speed, the Xeon W-2140B has a role.

The choice depends on the use case. Desktop enthusiasts and overclockers should select the i7-9800X, as it delivers higher performance across the board and allows multiplier adjustment. Server or workstation builders who need ECC memory and additional PCIe lanes should consider the Xeon W-2140B, accepting a modest performance penalty in exchange for those platform features. The data shows a faster desktop part and a more feature-complete workstation part, and the right pick hinges on which of those priorities matters more.