Intel Core i9-9820X vs Intel Xeon E5-2699A v4 Comparison

The Verdict

The benchmark data consistently favors the Intel Xeon E5-2699A v4 across every recorded test, but the margins are surprisingly narrow given the architectural divide. The Xeon wins all six head-to-head comparisons, yet the largest advantage is only 2.1%, which appears in Cinebench R20 multi-core, R23 multi-core, and R23 single-core. The Core i9-9820X never takes a single win in the recorded suite.

For workloads that stress multi-threaded rendering, the Xeon E5-2699A v4 posts a Cinebench R23 multi-core score of 17826 against 17459 for the Core i9-9820X, a 2.1% edge. The single-core results tell a similar story: the Xeon leads in R23 single-core with 2516 versus 2464, again a 2.1% margin. The Core i9-9820X does hold a higher base clock of 3.30 GHz and boost clock of 4.20 GHz compared to 2.40 GHz and 3.60 GHz on the Xeon, yet the benchmark results do not translate those clock advantages into victory.

The Xeon also carries 22 cores and 44 threads, more than double the 10 cores and 20 threads of the Core i9-9820X, along with 55 MB of shared L3 cache versus 16.5 MB. The Core i9 counters with a larger per-core L2 cache of 1 MB compared to 256 KB, plus 44 PCIe Gen 3 lanes versus 40, and a higher memory bandwidth of 85.3 GB/s against 76.8 GB/s. Despite these specification advantages for the Core i9, the recorded benchmarks show the Xeon ahead in every category.

The average benchmark score reinforces this picture: the Xeon averages 5259 across all tests, while the Core i9 averages 5049, a difference of roughly 4.2%. Both processors sit at the 60th percentile among all CPUs in the database, meaning they occupy the same overall performance tier despite their different configurations.

Users who prioritize the highest raw multi-threaded throughput should choose the Xeon E5-2699A v4, as it wins every recorded multi-core test. Users who need the unlocked multiplier for overclocking, the higher memory bandwidth, or the additional PCIe lanes should consider the Core i9-9820X, though the data shows it trails in every benchmark. The Xeon supports ECC memory while the Core i9 does not, a factor for reliability-sensitive deployments. The Core i9 launches with an unlocked multiplier, whereas the Xeon is locked, which matters for enthusiasts seeking frequency tuning beyond stock settings.

FAQ

Q: Which processor wins more benchmark comparisons?

A: The Intel Xeon E5-2699A v4 wins all six head-to-head benchmark comparisons. The Core i9-9820X records zero wins in the tested suite.

Q: How large is the multi-core performance gap in Cinebench R23?

A: The Xeon scores 17826 in Cinebench R23 multi-core, while the Core i9 scores 17459. The Xeon leads by 2.1% in this test.

Q: Does the Core i9-9820X have any specification advantage over the Xeon?

A: Yes. The Core i9 has a higher base clock (3.30 GHz versus 2.40 GHz), a higher boost clock (4.20 GHz versus 3.60 GHz), larger per-core L2 cache (1 MB versus 256 KB), more PCIe lanes (44 versus 40), higher memory bandwidth (85.3 GB/s versus 76.8 GB/s), and an unlocked multiplier.

Q: Which processor supports ECC memory?

A: The Intel Xeon E5-2699A v4 supports ECC memory. The Intel Core i9-9820X does not list ECC memory support in the database.

Q: What are the core and thread counts for each processor?

A: The Xeon E5-2699A v4 has 22 cores and 44 threads. The Core i9-9820X has 10 cores and 20 threads.

Q: How do the average benchmark scores compare?

A: The Xeon has an average benchmark score of 5259, while the Core i9 has an average score of 5049. Both sit at the 60th percentile among all CPUs.

Architecture Differences

The two processors come from different Intel architecture families built on the same 14 nm process node. The Xeon E5-2699A v4 uses the Broadwell architecture, specifically the Broadwell-EP codename, and belongs to the Xeon E5 generation. The Core i9-9820X uses the Skylake architecture, specifically the Skylake-X codename, and belongs to the Core i9 X-Series 9th Gen family. Both are manufactured by Intel on the 14 nm node, so the fabrication process itself does not separate them.

The transistor counts and die sizes differ substantially, though the database only records these figures for the Xeon. The Xeon E5-2699A v4 contains 7,200 million transistors on a 456 mm² die. No transistor count or die size is recorded for the Core i9-9820X, so a direct comparison on those physical characteristics cannot be made from the available data.

Cache architecture reveals a significant design divergence. Both processors share the same per-core L1 cache at 64 KB and the same per-core L2 allocation of 256 KB on the Xeon, but the Core i9 expands its per-core L2 to 1 MB. The shared L3 cache tells the opposite story: the Xeon carries 55 MB of shared L3, while the Core i9 has only 16.5 MB. This means the Xeon dedicates far more die area to a large shared pool for its 22 cores, while the Core i9 emphasizes larger private L2 per core for its 10 cores.

Memory support is another architectural differentiator. Both support DDR4 memory with a quad-channel memory bus, but the Core i9 records a higher memory bandwidth of 85.3 GB/s compared to 76.8 GB/s for the Xeon. ECC memory support is present on the Xeon but absent on the Core i9, reflecting the server heritage of the Xeon line versus the desktop-oriented Core i9.

PCIe connectivity also differs. The Xeon provides Gen 3 with 40 lanes from the CPU, while the Core i9 provides Gen 3 with 44 lanes from the CPU. Neither processor includes integrated graphics, so both rely on discrete GPUs.

The sockets are incompatible: the Xeon uses Intel Socket 2011-3, while the Core i9 uses Intel Socket 2066. The production status for both is listed as end-of-life. The Xeon launched earlier, with a release date in 2016, while the Core i9 launched in 2018.

Specification Differences

The core and thread counts present the clearest gap: the Xeon E5-2699A v4 offers 22 cores and 44 threads, while the Core i9-9820X offers 10 cores and 20 threads. This is a difference of 12 cores and 24 threads in favor of the Xeon.

Clock speeds favor the Core i9. The Core i9 has a base clock of 3.30 GHz and a boost clock of 4.20 GHz. The Xeon has a base clock of 2.40 GHz and a boost clock of 3.60 GHz. The Core i9 runs 0.90 GHz higher at base and 0.60 GHz higher at boost.

Thermal design power also differs. The Core i9 has a TDP of 165 watts, while the Xeon has a TDP of 145 watts. The Core i9 consumes more power under its rated design envelope despite having fewer cores.

Cache configuration differs in both L2 and L3. The Xeon has 256 KB of L2 per core and 55 MB of shared L3. The Core i9 has 1 MB of L2 per core and 16.5 MB of shared L3. The total L2 capacity depends on core count: the Xeon's 22 cores at 256 KB each yields 5.5 MB of total L2, while the Core i9's 10 cores at 1 MB each yields 10 MB of total L2, though these totals are not explicitly recorded in the database.

Memory bandwidth favors the Core i9 at 85.3 GB/s versus 76.8 GB/s for the Xeon. ECC support is exclusive to the Xeon. PCIe lane counts favor the Core i9 at 44 lanes versus 40 lanes, both Gen 3.

The multiplier is unlocked on the Core i9, while the Xeon is locked. The part numbers differ: the Xeon is SR30YQLPM, and the Core i9 is SREZ8. The launch MSRP for the Xeon is $4938, and the launch MSRP for the Core i9 is $889.

Head-to-Head Benchmarks

The recorded benchmark suite contains six tests, and the Xeon E5-2699A v4 wins all six. The largest margins appear in Cinebench R20 multi-core, Cinebench R23 multi-core, and Cinebench R23 single-core, each showing a 2.1% delta in favor of the Xeon.

In Cinebench R15 multi-core, the Xeon scores 1796 against 1759 for the Core i9, a 2.1% advantage. The single-core R15 test shows the Xeon at 253 versus 248, a 2% lead. This is the narrowest margin in the entire suite, yet it still goes to the Xeon.

Cinebench R20 multi-core repeats the pattern: the Xeon scores 7486, the Core i9 scores 7332, and the delta is 2.1%. Cinebench R20 single-core shows the Xeon at 1056 against 1034, again a 2.1% edge.

Cinebench R23 multi-core delivers the highest absolute scores in the suite. The Xeon posts 17826, while the Core i9 posts 17459, a 2.1% difference. Cinebench R23 single-core shows the Xeon at 2516 and the Core i9 at 2464, a 2.1% margin.

The Geekbench tests appear only for the Xeon in the recorded data, with a multi-core score of 10118 and a single-core score of 1020. No Geekbench scores are recorded for the Core i9, so no head-to-head comparison is possible for that benchmark.

The consistency of the margins is notable. Across five of the six tests, the delta sits at exactly 2.1%, with only the R15 single-core test showing 2%. This uniformity suggests the performance gap is stable across different workload intensities and thread counts, rather than scaling with core count.

The Core i9's higher clocks and memory bandwidth do not overcome the Xeon's core count and L3 cache advantage in the recorded tests. Even in single-core tests, where the Core i9's 4.20 GHz boost clock should theoretically help, the Xeon still leads by 2% to 2.1%. The Xeon's average benchmark score of 5259 also exceeds the Core i9's 5049, placing the Xeon ahead of its nearest rivals by 0.1% to 0.4% while the Core i9 sits within 0.5% of its own nearest rivals in either direction.

The nearest rival data places the Xeon in a tight cluster: the Intel Core i5-14401E trails by 0.1%, the Intel Core i7-11700B trails by 0.4%, and the Intel Core i9-10850K trails by 0.4%, while the Intel Core i9-9900X leads by 0.8%. The Core i9-9820X sits similarly close to its rivals: the Intel Core i9-12900TE matches it at 0% delta, the Intel Xeon Gold 6334 trails by 0.1%, and both the AMD Ryzen 7 PRO 5750GE and Intel Xeon W-2155 lead by 0.4% and 0.5% respectively. Both processors therefore occupy crowded performance bands where small margins separate many models.