Intel Core i9-7940X vs Intel Xeon D-2796TE Comparison

The Verdict

The recorded data presents a clear hierarchy: the Intel Xeon D-2796TE wins every single benchmark in the head-to-head comparison, taking all six measured tests with a consistent 4.7% margin over the Intel Core i9-7940X. The Xeon D-2796TE also holds the higher aggregate benchmark score, 6510 versus 6147, and sits at the 62nd percentile of all CPUs in the database, one point above the Core i9-7940X at the 61st percentile.

For a desktop user focused on peak single-thread responsiveness or overclocking flexibility, the Core i9-7940X offers an unlocked multiplier and a much higher boost clock of 4.40 GHz, which the Xeon cannot match. However, the benchmark data shows that the Xeon D-2796TE still manages to outperform it in every recorded test despite the clock disadvantage. For a server or workstation buyer prioritizing sustained multicore throughput, ECC memory support, and lower power draw, the Xeon D-2796TE is the clear pick. The Core i9-7940X is an end-of-life desktop part; the Xeon D-2796TE is an active server/workstation product. The data does not support choosing the Core i9-7940X on performance grounds in any measured workload.

Architecture Differences

The two processors come from entirely different design lineages. The Intel Core i9-7940X uses the Skylake-X architecture, built on a 14 nm process by Intel, and belongs to the Core i9 X-Series 7th Generation family. The Intel Xeon D-2796TE uses the Ice Lake-D architecture, built on a 10 nm process, and belongs to the Xeon D (Ice Lake-D) generation. The process node difference alone suggests the Xeon D-2796TE is a newer design, and the release dates confirm this: the Core i9-7940X launched on 2017-08-31, while the Xeon D-2796TE launched on 2022-02-23.

Core and thread counts differ substantially. The Core i9-7940X has 14 cores and 28 threads, while the Xeon D-2796TE has 20 cores and 40 threads. That is 6 more cores and 12 more threads on the Xeon side. Cache hierarchies follow the core counts. The Core i9-7940X has 64 KB of L1 cache per core, 1 MB of L2 per core, and 19.25 MB of shared L3 cache. The Xeon D-2796TE has 80 KB of L1 per core, 1.25 MB of L2 per core, and 30 MB of shared L3 cache. The larger per-core caches and the larger shared L3 on the Xeon D-2796TE align with its higher core count and server-oriented design.

Memory support also diverges. Both parts support DDR4 memory and use a quad-channel memory bus, but the Core i9-7940X has a memory bandwidth of 85.3 GB/s, while the Xeon D-2796TE reaches 93.9 GB/s. The Xeon D-2796TE supports ECC memory; the Core i9-7940X does not. PCIe connectivity differs as well: the Core i9-7940X provides Gen 3 with 44 lanes (CPU only), while the Xeon D-2796TE provides Gen 4 with 32 lanes (CPU only). The newer PCIe generation on the Xeon D-2796TE offers higher per-lane bandwidth, although the core i9-7940X has more total lanes.

The Core i9-7940X uses the Intel Socket 2066, a desktop-oriented socket, and has an unlocked multiplier. The Xeon D-2796TE uses the Intel BGA 2579 socket, a soldered embedded/server form factor, and has a locked multiplier. The Core i9-7940X has a die size of 484 mm², while the Xeon D-2796TE has no recorded die size in the database.

Head-to-Head Benchmarks

The head-to-head results are uniformly in favor of the Intel Xeon D-2796TE across all six Cinebench tests. In Cinebench R15 multicore, the Core i9-7940X scores 2161, while the Xeon D-2796TE scores 2268, a 4.7% advantage. In Cinebench R15 singlecore, the Core i9-7940X scores 305, the Xeon D-2796TE scores 320, again a 4.7% lead.

The pattern repeats exactly in Cinebench R20. The Core i9-7940X scores 9006 in multicore, the Xeon D-2796TE scores 9452, a 4.7% difference. In singlecore, the Core i9-7940X scores 1271, the Xeon D-2796TE scores 1334, another 4.7% margin.

In Cinebench R23, the most demanding of the Cinebench suite, the Core i9-7940X scores 21444 in multicore, while the Xeon D-2796TE scores 22507, a 4.7% improvement. In singlecore, the Core i9-7940X scores 3027, the Xeon D-2796TE scores 3177, maintaining the exact same 4.7% delta. The consistency of the margin across all six tests is notable. The Xeon D-2796TE does not merely win by a larger amount in multicore due to its 20 cores; it wins by the same proportion in singlecore, which suggests that per-core efficiency and clock behavior are the dominant factors, not just core count.

The Core i9-7940X has no recorded wins in the head-to-head set; the Xeon D-2796TE wins all six. For additional context, the Core i9-7940X has a Geekbench multicore score of 10516 and a singlecore score of 1445, but the Xeon D-2796TE has no Geekbench entries in the database, so no direct comparison is possible there.

Specification Differences

The two processors differ in nearly every major specification field. The table below summarizes only the fields where they diverge.

| Specification | Intel Core i9-7940X | Intel Xeon D-2796TE |

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

| Cores | 14 | 20 |

| Threads | 28 | 40 |

| Base clock | 3.10 GHz | 2000.00 MHz |

| Boost clock | 4.40 GHz | 3.10 GHz |

| TDP | 165 W | 118 W |

| Socket | Intel Socket 2066 | Intel BGA 2579 |

| Architecture | Skylake | Ice Lake |

| Codename | Skylake-X | Ice Lake-D |

| Generation | Core i9 (X-Series 7th Gen) | Xeon D (Ice Lake-D) |

| Process node | 14 nm | 10 nm |

| L1 cache | 64 KB (per core) | 80 KB (per core) |

| L2 cache | 1 MB (per core) | 1.25 MB (per core) |

| L3 cache | 19.25 MB (shared) | 30 MB (shared) |

| Memory bandwidth | 85.3 GB/s | 93.9 GB/s |

| ECC memory | false | true |

| PCIe | Gen 3, 44 Lanes (CPU only) | Gen 4, 32 Lanes (CPU only) |

| Market segment | Desktop | Server/Workstation |

| Production status | End-of-life | Active |

| Release date | 2017-08-31 | 2022-02-23 |

| Launch MSRP | $1399 | $2101 |

| Multiplier unlocked | true | false |

The Core i9-7940X has a higher base clock (3.10 GHz versus 2000.00 MHz) and a higher boost clock (4.40 GHz versus 3.10 GHz), but it also draws more power: 165 W TDP versus 118 W TDP. The Xeon D-2796TE is more power-efficient per core and per thread, which aligns with its server positioning. The Core i9-7940X has a larger PCIe lane count (44 versus 32), but the Xeon D-2796TE runs the newer Gen 4 standard. The Core i9-7940X has a smaller L3 cache (19.25 MB versus 30 MB) and smaller per-core L1 and L2 caches. The Xeon D-2796TE supports ECC memory, the Core i9-7940X does not. The Core i9-7940X has an unlocked multiplier, the Xeon D-2796TE is locked.

FAQ

Q: Which CPU wins in Cinebench R23 multicore?

A: The Intel Xeon D-2796TE wins, scoring 22507 versus 21444 for the Intel Core i9-7940X, a 4.7% advantage.

Q: Does the Core i9-7940X have any benchmark wins against the Xeon D-2796TE?

A: No. The head-to-head data records zero wins for the Core i9-7940X and six wins for the Xeon D-2796TE across all Cinebench R15, R20, and R23 tests.

Q: How do the clock speeds compare?

A: The Core i9-7940X has a base clock of 3.10 GHz and a boost clock of 4.40 GHz. The Xeon D-2796TE has a base clock of 2000.00 MHz and a boost clock of 3.10 GHz. The Core i9-7940X is significantly higher in both metrics.

Q: Does the Xeon D-2796TE support ECC memory?

A: Yes. The Xeon D-2796TE has ECC memory support set to true in the database. The Core i9-7940X does not support ECC memory.

Q: What are the power draw figures?

A: The Core i9-7940X has a TDP of 165 W, while the Xeon D-2796TE has a TDP of 118 W. The Xeon D-2796TE draws less power despite having more cores.

Q: Which CPU has a higher aggregate benchmark score?

A: The Xeon D-2796TE has an average benchmark score of 6510, compared to 6147 for the Core i9-7940X. The Xeon D-2796TE also sits at the 62nd percentile of all CPUs, versus the 61st percentile for the Core i9-7940X.