CPU Comparison

The Intel Xeon E5-4669 v3 and the Intel Core i9-9900 represent two distinct approaches to x86 processing, separated by four years of architectural evolution and aimed at entirely different market segments. The data shows that the older Xeon, a 2015 server part, sweeps every head-to-head benchmark included in this comparison, yet the margin of victory is remarkably narrow given the differences in core count and platform. The Xeon E5-4669 v3 wins all six Cinebench tests, but its advantage hovers consistently around 9.4% to 9.8%, a surprisingly slim lead for a processor with 18 cores versus 8. This pattern suggests that raw core count alone does not tell the full story, and that clock speed, IPC improvements, and memory architecture all play critical roles in the final scores.

Head-to-Head Benchmarks

The Xeon E5-4669 v3’s largest single win comes in Cinebench R20 single-core, where it scores 878 against the Core i9-9900’s 800, a delta of 9.8%. This is the biggest percentage gap in the entire comparison, and it is striking because the Core i9-9900 has a base clock of 3.10 GHz and a boost clock of 5.00 GHz, while the Xeon operates at 2.10 GHz base and 2.90 GHz boost. The fact that the older, lower-clocked Xeon wins a single-threaded test by this margin indicates that the benchmark environment or the specific test conditions favor the Xeon’s architecture in ways that clock speed alone cannot explain. The same pattern repeats in Cinebench R15 single-core, where the Xeon leads 210 to 192, a 9.4% advantage.

In multi-core workloads, the Xeon’s lead is consistent but not overwhelming. Cinebench R15 multi-core shows 1493 for the Xeon versus 1361 for the Core i9-9900, a 9.7% delta. Cinebench R20 multi-core follows with 6222 versus 5673, also a 9.7% gap. Cinebench R23 multi-core shows 14815 versus 13509, again 9.7%. This uniformity across three different versions of the same benchmark suggests that the performance difference is structural rather than workload-specific. The Xeon’s 18 cores and 36 threads should theoretically provide a massive advantage over the Core i9-9900’s 8 cores and 16 threads in multi-threaded tests, yet the actual score difference is less than 10%.

The Core i9-9900 does have additional benchmark data not available for the Xeon, including Geekbench multi-core and single-core scores of 8175 and 1687, respectively. However, since no corresponding Geekbench scores exist for the Xeon in the fact pack, these cannot be used for direct comparison. The available data shows a clean sweep: the Xeon wins all six head-to-head tests, with the Core i9-9900 failing to secure a single victory. The win count is 6-0 in favor of the Xeon, and the average benchmark score reflects this, with the Xeon at 4285 and the Core i9-9900 at 4163.

The Verdict

From the data, the Intel Xeon E5-4669 v3 is the faster processor in every measured Cinebench test, both single-core and multi-core. A user prioritizing maximum benchmark scores in these specific workloads should choose the Xeon without hesitation. The Xeon’s percentile ranking of 58 versus the Core i9-9900’s 57 places them in essentially the same tier among all CPUs, but the Xeon edges ahead in every direct comparison. The Xeon also has a higher average benchmark score of 4285 versus 4163, a difference of about 2.9%.

That said, the context matters. The Xeon is a server/workstation part with a launch MSRP of $7007, while the Core i9-9900 has a launch MSRP of $423. The Xeon supports ECC memory, has quad-channel memory bandwidth of 68.3 GB/s, and offers 40 PCIe Gen 3 lanes. The Core i9-9900 is a desktop part with dual-channel memory at 42.7 GB/s, 16 PCIe lanes, and integrated UHD Graphics 630. The Xeon’s performance lead is real but modest, and its platform advantages in memory bandwidth and PCIe lanes are significant for server workloads. However, the Core i9-9900’s much lower TDP of 65 watts versus 135 watts makes it a more efficient choice for desktop use. The data supports the Xeon for pure benchmark performance, but the Core i9-9900 is the only option with integrated graphics, which may be a decisive factor for systems without a discrete GPU.

Architecture Differences

The two processors come from different eras and design philosophies. The Xeon E5-4669 v3 uses the Haswell-EP architecture on a 22 nm process node, with a die size of 662 mm². It has 18 cores and 36 threads, with a base clock of 2.10 GHz and a boost clock of 2.90 GHz. The Core i9-9900 uses the Coffee Lake-R architecture on a 14 nm process node, with a die size of 180.3 mm². It has 8 cores and 16 threads, with a base clock of 3.10 GHz and a boost clock of 5.00 GHz. The Core i9-9900’s 14 nm process is a refinement of Intel’s manufacturing, allowing higher clocks at lower power, while the Xeon’s 22 nm process is older and requires more power to achieve its modest clock speeds.

Cache hierarchies differ substantially. The Xeon has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and a shared 45 MB L3 cache. The Core i9-9900 has the same per-core L1 and L2 cache sizes, but its shared L3 cache is only 16 MB. This 29 MB difference in L3 cache is a major architectural distinction, and it helps explain why the Xeon can maintain competitive performance despite much lower clock speeds. The Xeon also supports quad-channel DDR4 memory with 68.3 GB/s bandwidth, while the Core i9-9900 is limited to dual-channel with 42.7 GB/s. The Xeon supports ECC memory, which the Core i9-9900 does not.

Socket and platform requirements differ completely. The Xeon uses Intel Socket 2011-3, while the Core i9-9900 uses Intel Socket 1151. The Xeon offers 40 PCIe Gen 3 lanes, while the Core i9-9900 offers only 16. The Xeon has no integrated graphics, while the Core i9-9900 includes UHD Graphics 630. The Xeon is marked for server/workstation use, while the Core i9-9900 is a desktop part. Both are end-of-life products, with the Xeon released in 2015 and the Core i9-9900 in 2019. Neither has an unlocked multiplier.

FAQ

Q: Which processor wins in single-core performance?

A: The Intel Xeon E5-4669 v3 wins all three single-core Cinebench tests. It scores 210 in R15, 878 in R20, and 2091 in R23, while the Core i9-9900 scores 192, 800, and 1907, respectively.

Q: How much faster is the Xeon in multi-core workloads?

A: The Xeon is consistently about 9.7% faster in multi-core tests. The deltas are 9.7% in Cinebench R15, R20, and R23 multi-core, with scores of 1493 versus 1361, 6222 versus 5673, and 14815 versus 13509, respectively.

Q: Does the Core i9-9900 have any benchmark wins?

A: No. The head-to-head data shows the Xeon winning all six tests, with a 6-0 win record. The Core i9-9900 does have Geekbench scores of 8175 multi-core and 1687 single-core, but no corresponding Xeon scores exist for comparison.

Q: What are the memory bandwidth differences?

A: The Xeon supports quad-channel memory with 68.3 GB/s bandwidth, while the Core i9-9900 supports dual-channel memory with 42.7 GB/s. The Xeon also supports ECC memory, which the Core i9-9900 does not.

Q: Which processor has more PCIe lanes?

A: The Xeon provides 40 PCIe Gen 3 lanes, while the Core i9-9900 provides 16 PCIe Gen 3 lanes. This gives the Xeon a significant advantage for expansion in server or workstation configurations.

Q: Do both processors have integrated graphics?

A: No. The Core i9-9900 includes UHD Graphics 630, while the Xeon has no integrated graphics. This requires the Xeon to be paired with a discrete GPU in any system.

Where Each One Wins

The Xeon E5-4669 v3 wins in every benchmark category measured. Its advantages stem from its 18 cores, 36 threads, and 45 MB of L3 cache. It leads in single-core tests despite lower clock speeds, which suggests the benchmark environment favors its architecture or that its larger cache compensates for the clock deficit. In multi-core tests, its 10 additional cores and 20 additional threads provide the expected boost, but the 9.7% margin is smaller than the core count difference would suggest. The Xeon also wins on platform features: quad-channel memory, ECC support, 40 PCIe lanes, and higher memory bandwidth make it the better choice for memory-intensive server workloads, virtualization, or any application that benefits from large amounts of cache and memory throughput.

The Core i9-9900 wins on efficiency and desktop practicality, though not on benchmark scores. Its 65 watt TDP is less than half of the Xeon’s 135 watts, making it far easier to cool in a standard desktop chassis. Its boost clock of 5.00 GHz is substantially higher than the Xeon’s 2.90 GHz, and while this does not translate to a benchmark win in the tested Cinebench workloads, it indicates potential strength in lightly threaded applications that are not represented in this data. The integrated UHD Graphics 630 means the Core i9-9900 can power a display without a discrete GPU, which is a clear advantage for basic desktop use. Its smaller die size of 180.3 mm² versus 662 mm² also suggests lower manufacturing cost and complexity. For a desktop user with a limited-power budget, the Core i9-9900 is the practical choice, even though it loses every benchmark in this comparison.

Specification Differences

The two processors differ in nearly every specification category. The Xeon has 18 cores and 36 threads; the Core i9-9900 has 8 cores and 16 threads. The Xeon runs at 2.10 GHz base and 2.90 GHz boost; the Core i9-9900 runs at 3.10 GHz base and 5.00 GHz boost. The Xeon has a TDP of 135 watts; the Core i9-9900 has a TDP of 65 watts. The Xeon uses a 22 nm process; the Core i9-9900 uses a 14 nm process. The Xeon’s die is 662 mm²; the Core i9-9900’s is 180.3 mm². The Xeon has 45 MB of shared L3 cache; the Core i9-9900 has 16 MB.

Socket compatibility is entirely different: the Xeon uses Intel Socket 2011-3, while the Core i9-9900 uses Intel Socket 1151. Memory support differs in channel count: the Xeon is quad-channel with 68.3 GB/s bandwidth, while the Core i9-9900 is dual-channel with 42.7 GB/s. ECC memory is supported by the Xeon but not the Core i9-9900. PCIe lane counts are 40 for the Xeon versus 16 for the Core i9-9900. The Xeon has no integrated graphics, while the Core i9-9900 includes UHD Graphics 630. Market segments are server/workstation for the Xeon and desktop for the Core i9-9900. Release dates are 2015 for the Xeon and 2019 for the Core i9-9900. Part numbers are SR22M QH9B for the Xeon and SRG18 for the Core i9-9900.