Intel Core i7-9800X vs Intel Xeon E5-4669 v3 Comparison

Head-to-Head Benchmarks

The recorded data shows a clean sweep: the Intel Core i7-9800X wins all six head-to-head benchmarks against the Intel Xeon E5-4669 v3. The margins are consistent, ranging from 4.0% to 4.3%, but the pattern is unmistakable. In Cinebench R15 multi-core, the i7-9800X scores 1553 against the Xeon’s 1493, a 4% advantage. Single-core in the same test goes 219 versus 210, a 4.3% lead. The R20 suite shows the same story: 6474 against 6222 in multi-core (4.1% ahead) and 913 against 878 in single-core (4% ahead). In the newer R23 tests, the i7-9800X posts 15416 versus 14815 in multi-core, and 2176 versus 2091 in single-core, both 4.1% margins.

What is notable here is not just the win count, but the consistency. The i7-9800X is faster in every single workload category, whether the test is heavily threaded or purely single-threaded. The largest delta is in Cinebench R15 single-core, where the i7-9800X leads by 4.3%. The smallest delta is in R15 multi-core, at 4%. This uniformity suggests a per-core clock advantage that scales across the board, not a niche strength in one particular benchmark type.

Looking at the broader database context, both CPUs sit at the 58th percentile among all processors. The i7-9800X has an average benchmark score of 4455, while the Xeon E5-4669 v3 averages 4285. That is a 170-point gap, or roughly 4% in the aggregate. The i7-9800X’s nearest rivals in the database include the AMD Ryzen 5 PRO 5650GE (4470, -0.3%), the AMD Ryzen 7 PRO 4750GE (4411, 1%), the Intel Core i7-12700TE (4513, -1.3%), and the Intel Core i5-1250P (4515, -1.3%). The Xeon’s nearest rivals are the AMD Ryzen 7 PRO 5750G (4296, -0.3%), the Intel Xeon W-2140B (4272, 0.3%), the Intel Core i7-7820X (4321, -0.8%), and the Intel Core i7-1265U (4248, 0.9%). Neither chip is near the top of the database, but the i7-9800X holds a clear edge over the Xeon in every measured category.

The Verdict

The data is unambiguous: the Intel Core i7-9800X is the faster processor in every recorded benchmark. If raw performance is the sole criterion, the choice is the i7-9800X. It wins all six head-to-head tests, with margins between 4% and 4.3%. That is a small but consistent advantage, and it appears in both multi-core and single-core workloads.

However, the Xeon E5-4669 v3 is not without its own rationale. It has 18 cores and 36 threads against the i7-9800X’s 8 cores and 16 threads. The Xeon also supports ECC memory, which the i7-9800X does not. For a server or workstation environment where data integrity and error correction are critical, that ECC support is a meaningful differentiator. The Xeon’s TDP is also lower at 135 watts versus 165 watts, which matters in dense server deployments.

The i7-9800X is a desktop part with an unlocked multiplier, a 4.50 GHz boost clock, and a launch MSRP of $589. The Xeon is a locked server part with a 2.90 GHz boost clock and a launch MSRP of $7007. The price difference is enormous, but the performance difference is small. That said, the Xeon’s value proposition lies in its core count, ECC support, and lower power envelope, not in benchmark dominance.

For a builder prioritizing single-thread responsiveness, overclocking headroom, or general desktop workload performance, the i7-9800X is the clear pick. For a systems integrator building a stability-critical server with ECC memory and many parallel threads, the Xeon has features the i7-9800X simply cannot offer. The benchmark data favors the i7-9800X, but the feature set tells a more nuanced story.

FAQ

Q: Which CPU is faster in multi-core benchmarks?

A: The Intel Core i7-9800X wins all three multi-core Cinebench tests. In R15, it scores 1553 versus 1493 (4% ahead). In R20, it scores 6474 versus 6222 (4.1% ahead). In R23, it scores 15416 versus 14815 (4.1% ahead).

Q: Does the Xeon E5-4669 v3 have any advantage in single-core performance?

A: No. The i7-9800X leads in every single-core test as well. R15 single-core goes 219 versus 210 (4.3% ahead), R20 single-core goes 913 versus 878 (4% ahead), and R23 single-core goes 2176 versus 2091 (4.1% ahead).

Q: What is the core and thread count difference?

A: The Xeon E5-4669 v3 has 18 cores and 36 threads. The Intel Core i7-9800X has 8 cores and 16 threads. The Xeon has more than double the core count, yet still loses in all recorded benchmarks.

Q: Which CPU supports ECC memory?

A: The Intel Xeon E5-4669 v3 supports ECC memory. The Intel Core i7-9800X does not support ECC memory. Both support DDR4 and quad-channel memory.

Q: What is the average benchmark score difference?

A: The i7-9800X has an average benchmark score of 4455, while the Xeon E5-4669 v3 averages 4285. That is a 170-point gap, with the i7-9800X holding the higher aggregate score.

Q: Are both CPUs still in production?

A: No. Both are listed as end-of-life in the database. The i7-9800X was released on 2018-10-18, and the Xeon E5-4669 v3 was released on 2015-05-31.

Specification Differences

The two processors diverge sharply on core architecture and platform. The Intel Core i7-9800X has 8 cores and 16 threads, with a base clock of 3.80 GHz and a boost clock of 4.50 GHz. The Intel Xeon E5-4669 v3 has 18 cores and 36 threads, but with a much lower base clock of 2.10 GHz and a boost clock of 2.90 GHz. The i7-9800X has a TDP of 165 watts, while the Xeon draws 135 watts.

Memory bandwidth favors the i7-9800X at 85.3 GB/s, against the Xeon’s 68.3 GB/s. Both support DDR4 and quad-channel memory, but the i7-9800X does not support ECC memory, while the Xeon does. The PCIe lane counts differ as well: the i7-9800X offers 44 lanes (Gen 3, CPU only), while the Xeon offers 40 lanes (Gen 3, CPU only). The i7-9800X has an unlocked multiplier; the Xeon is locked. The sockets are incompatible: the i7-9800X uses Intel Socket 2066, and the Xeon uses Intel Socket 2011-3.

Cache layouts are markedly different. The i7-9800X has 64 KB L1 per core, 1 MB L2 per core, and 16.5 MB shared L3. The Xeon has 64 KB L1 per core, 256 KB L2 per core, and a much larger 45 MB shared L3. The Xeon also has a documented die size of 662 mm², while the i7-9800X has no die size recorded in the database.

Architecture Differences

The architectural gap is generation-wide. The Intel Core i7-9800X is built on Skylake-X, a 14 nm process, and belongs to the Core i7 X-Series 9th Gen family. The Intel Xeon E5-4669 v3 is Haswell-EP, built on a 22 nm process, and belongs to the Xeon E5 (Haswell-EP) generation. The process node difference is significant: 14 nm versus 22 nm, which helps explain the i7-9800X’s clock speed advantage despite its lower core count.

The i7-9800X uses the Skylake architecture with a 4.50 GHz boost clock, while the Xeon uses the older Haswell architecture with a 2.90 GHz boost clock. The Xeon compensates with 18 cores and 45 MB of shared L3 cache, compared to the i7-9800X’s 8 cores and 16.5 MB of shared L3. Despite the Xeon’s larger cache and core count, the i7-9800X’s superior per-core throughput and higher clocks win every benchmark.

Feature differences matter for specific use cases. The Xeon supports ECC memory, a critical feature for error-sensitive server workloads. The i7-9800X does not. The i7-9800X has an unlocked multiplier, enabling overclocking; the Xeon is locked. The i7-9800X also has a higher memory bandwidth rating (85.3 GB/s versus 68.3 GB/s), which benefits memory-intensive desktop tasks.

Where Each One Wins

The Intel Core i7-9800X wins on raw performance in every recorded benchmark. Its 4.50 GHz boost clock and Skylake architecture deliver higher single-thread and multi-thread scores than the Xeon’s 2.90 GHz Haswell design. For desktop workloads, content creation, gaming, or any task that benefits from high clock speeds and responsive single-thread performance, the i7-9800X is the superior choice. Its unlocked multiplier also allows overclocking, which can push performance further beyond the stock numbers.

The Intel Xeon E5-4669 v3 wins on core count, ECC support, and power efficiency. With 18 cores and 36 threads, it offers more parallel processing capacity, even if the benchmark results show it losing in raw throughput. For server or workstation deployments where ECC memory is mandatory, or where the lower 135-watt TDP is preferred over the i7-9800X’s 165 watts, the Xeon is the practical pick. Its 45 MB shared L3 cache is also larger, which can help in workloads with substantial data reuse.

The benchmark data does not support a scenario where the Xeon outperforms the i7-9800X in speed. But the Xeon’s feature set, specifically ECC memory and higher core count, makes it the appropriate choice for stability-focused server environments. The i7-9800X is the performance winner; the Xeon is the platform-feature winner. The right choice depends entirely on whether the workload demands ECC support and many threads, or whether it rewards higher clocks and faster per-core execution.