Intel Core i9-7900X vs Intel Xeon E5-2699A v4 Comparison

The Intel Xeon E5-2699A v4 and the Intel Core i9-7900X represent two divergent philosophies for high-end desktop computing from Intel's 14nm era. The Xeon is a 22-core Broadwell-EP part designed for maximum multi-threaded throughput, while the Core i9-7900X is a 10-core Skylake-X chip built for high clock speeds and overclocking. Benchmark data shows the Xeon edges out the Core i9 in the majority of tests, but the Core i9 delivers a decisive blow in single-core Geekbench performance. Both processors hold the same 60th percentile ranking among all CPUs, though the Xeon carries a higher average benchmark score of 5259 against the Core i9's 5120.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon E5-2699A v4 has 22 cores and 44 threads, while the Intel Core i9-7900X has 10 cores and 20 threads. This gives the Xeon more than double the thread count for heavily parallel workloads.

Q: How do the two compare in multi-core Cinebench R23 performance?

A: The Xeon E5-2699A v4 scores 17826 in Cinebench R23 multi-core, while the Core i9-7900X scores 17680. The Xeon wins by 0.8%, a narrow margin that suggests the Core i9's higher clock speeds nearly compensate for its lower core count.

Q: Which chip wins in single-core Geekbench performance, and by how much?

A: The Intel Core i9-7900X wins the Geekbench single-core test with a score of 1437, compared to the Xeon's 1020. This represents a 29% advantage for the Core i9, making it the clear choice for lightly-threaded applications.

Q: What is the memory bandwidth difference between the two?

A: The Intel Core i9-7900X has a memory bandwidth of 85.3 GB/s, while the Intel Xeon E5-2699A v4 has 76.8 GB/s. Both support DDR4 memory in a quad-channel configuration.

Q: Do both processors support ECC memory?

A: No. The Intel Xeon E5-2699A v4 supports ECC memory, while the Intel Core i9-7900X does not. This makes the Xeon more suitable for error-sensitive compute tasks.

Q: Which processor has a higher boost clock speed?

A: The Intel Core i9-7900X has a boost clock of 4.50 GHz, compared to the Xeon E5-2699A v4's 3.60 GHz. The Core i9 also has a higher base clock of 3.30 GHz versus 2.40 GHz on the Xeon.

Architecture Differences

The two processors are built on the same 14nm process node by Intel, but they employ fundamentally different architectures. The Xeon E5-2699A v4 uses the Broadwell-EP microarchitecture, part of the Broadwell generation, while the Core i9-7900X uses the Skylake-X microarchitecture from the Skylake generation. This architectural split explains many of the performance characteristics observed in the benchmark data.

The Xeon's Broadwell-EP design prioritizes core count, packing 22 cores and 44 threads onto a 456 mm² die with 7,200 million transistors. The Core i9-7900X, by contrast, uses a Skylake-X design with 10 cores and 20 threads, and its transistor count and die size are not listed in the data. Cache configurations differ substantially: the Xeon has 64 KB of L1 and 256 KB of L2 per core, plus a massive 55 MB of shared L3 cache. The Core i9 has the same 64 KB L1 per core but a much larger 1 MB L2 per core, while its shared L3 cache is only 14 MB.

The memory controllers also differ. The Xeon supports quad-channel DDR4 with a peak bandwidth of 76.8 GB/s and includes ECC memory support, a feature absent from the Core i9. The Core i9 offers higher memory bandwidth at 85.3 GB/s despite the same quad-channel configuration. PCIe lanes differ as well: the Xeon provides 40 PCIe Gen 3 lanes from the CPU, while the Core i9 provides 44 lanes.

The sockets are incompatible. The Xeon uses Intel Socket 2011-3, while the Core i9 uses Intel Socket 2066. The Core i9 has an unlocked multiplier for overclocking, whereas the Xeon's multiplier is locked. The Core i9 also carries a higher TDP of 140W compared to the Xeon's 145W, despite having fewer cores.

Head-to-Head Benchmarks

The benchmark results paint a picture of two chips that trade blows, but with the Xeon holding a narrow lead in most tests. In Cinebench R15 multi-core, the Xeon scores 1796 against the Core i9's 1782, a 0.8% margin. The single-core R15 test shows the same pattern: 253 for the Xeon versus 251 for the Core i9, again a 0.8% difference. These are razor-thin margins that fall within normal run-to-run variance.

Moving to Cinebench R20, the Xeon repeats its 0.8% advantage in both multi-core (7486 vs 7425) and single-core (1056 vs 1048). The story continues with Cinebench R23, where the Xeon scores 17826 multi-core and 2516 single-core, versus 17680 and 2496 for the Core i9, both again 0.8% ahead. Across all six Cinebench tests, the Xeon wins by the same margin, suggesting a consistent architectural efficiency advantage rather than a clock speed difference.

The Geekbench results break the pattern. In Geekbench multi-core, the Xeon scores 10118 against the Core i9's 8841, a significant 14.4% advantage. This is the largest multi-core win in the head-to-head data, reflecting the Xeon's superior thread scaling in this particular workload. However, the Geekbench single-core test flips the script entirely: the Core i9 scores 1437 against the Xeon's 1020, a 29% victory for the Core i9. This is the only test the Core i9 wins, and it wins it decisively.

The overall tally shows the Xeon winning 7 of 8 head-to-head tests, with the Core i9 taking a single but emphatic win. The data suggests that for mixed workloads, the Xeon is the more consistent performer, while the Core i9 has a clear edge in single-threaded responsiveness.

The Verdict

The data points to a clear split based on workload type. The Intel Xeon E5-2699A v4 is the better choice for multi-threaded applications where core count and cache size matter. It wins every multi-core benchmark in the head-to-head comparison, from Cinebench R15 through R23, and its 14.4% Geekbench multi-core advantage is substantial. The 55 MB of L3 cache, 22 cores, and ECC memory support make it suited for rendering, scientific computing, and virtualized environments where errors are costly.

The Intel Core i9-7900X is the pick for workloads that depend heavily on single-core performance. Its 29% lead in Geekbench single-core is the largest margin in any test, and its higher base and boost clocks (3.30 GHz and 4.50 GHz respectively) give it an edge in older or less-parallel software. The unlocked multiplier and 44 PCIe lanes also make it more flexible for enthusiasts who want to overclock or run multiple expansion cards.

The Xeon's average benchmark score of 5259 sits 2.7% above the Core i9's 5120, and both chips occupy the same 60th percentile among all CPUs. The Xeon's nearest rivals include the Intel Core i9-10850K (deltaPct 0.4) and the Intel Core i9-9900X (deltaPct -0.8), while the Core i9's closest competitors are the AMD EPYC 7262 (deltaPct 0.2) and the Intel Xeon W-2155 (deltaPct 0.9). Neither chip is a runaway winner overall; the Xeon wins on consistency and multi-core muscle, while the Core i9 wins on raw single-thread speed.

Users who run heavily threaded workloads all day should choose the Xeon E5-2699A v4. Users who prioritize fast single-core response, overclocking headroom, or need the extra PCIe lanes should choose the Core i9-7900X.

Specification Differences

| Specification | Intel Xeon E5-2699A v4 | Intel Core i9-7900X |

|---|---|---|

| Cores | 22 | 10 |

| Threads | 44 | 20 |

| Base Clock | 2.40 GHz | 3.30 GHz |

| Boost Clock | 3.60 GHz | 4.50 GHz |

| TDP | 145 W | 140 W |

| Socket | Intel Socket 2011-3 | Intel Socket 2066 |

| Architecture | Broadwell | Skylake |

| Codename | Broadwell-EP | Skylake-X |

| Generation | Xeon E5 (Broadwell-EP) | Core i9 (X-Series 7th Gen) |

| Process Node | 14 nm | 14 nm |

| Transistors | 7,200 million | Not listed |

| Die Size | 456 mm² | Not listed |

| L2 Cache | 256 KB (per core) | 1 MB (per core) |

| L3 Cache | 55 MB (shared) | 14 MB (shared) |

| Memory Bandwidth | 76.8 GB/s | 85.3 GB/s |

| ECC Memory | Yes | No |

| PCIe Lanes | Gen 3, 40 Lanes (CPU only) | Gen 3, 44 Lanes (CPU only) |

| Multiplier Unlocked | No | Yes |

| Launch MSRP | $4938 | $999 |

| Part Number | SR30YQLPM | SR3L2 |