AMD EPYC 72F3 vs Intel Core i9-9940X Comparison

The benchmark data is unambiguous: the Intel Core i9-9940X wins every single head-to-head test in this comparison, taking all six Cinebench matchups with a consistent 2.7% margin over the AMD EPYC 72F3. Despite the AMD chip’s newer 7nm Zen 3 architecture, its 8-core/16-thread configuration simply cannot overcome the Intel part’s 14-core/28-thread advantage in these threaded workloads. The EPYC 72F3 does hold a slight edge in average benchmark score (6700 vs 6657) and matches the Intel part at the 62nd percentile of all CPUs, but the direct comparison shows Intel ahead in every measured scenario.

The verdict splits cleanly by use case. The Intel Core i9-9940X is the pick for anyone running Cinebench-style rendering or heavily threaded applications where the 14 cores provide a measurable, if modest, performance lead. The AMD EPYC 72F3, however, is the server/workstation choice, offering ECC memory support, eight-channel memory bandwidth at 204.8 GB/s versus the Intel part’s quad-channel 85.3 GB/s, and PCIe Gen 4 with 128 lanes against Intel’s Gen 3 with 44 lanes. For a database or virtualization workload that scales with memory bandwidth and I/O rather than raw core count, the EPYC’s platform features outweigh its slight benchmark deficit.

FAQ

Q: Which processor wins in Cinebench multi-core tests?

A: The Intel Core i9-9940X wins all three multi-core tests: Cinebench R15 (2400 vs 2334), R20 (10000 vs 9728), and R23 (23810 vs 23164). Each win carries a deltaPct of -2.7% from the AMD EPYC 72F3’s perspective.

Q: Does the AMD EPYC 72F3 have any benchmark advantage?

A: The EPYC 72F3 has a higher average benchmark score of 6700 compared to the Intel Core i9-9940X’s 6657, a 0.6% advantage per the nearestRivals data. However, this does not translate to a win in any direct head-to-head Cinebench test.

Q: What is the core and thread difference between the two?

A: The Intel Core i9-9940X has 14 cores and 28 threads, while the AMD EPYC 72F3 has 8 cores and 16 threads. The Intel part also features a larger L2 cache at 1 MB per core versus 512 KB per core on the AMD, though the AMD chip has a much larger shared L3 cache at 256 MB versus 19.25 MB.

Q: Which processor supports ECC memory?

A: Only the AMD EPYC 72F3 supports ECC memory. The Intel Core i9-9940X does not list ECC memory support in its specifications.

Q: How do the memory bandwidth capabilities differ?

A: The AMD EPYC 72F3 offers eight-channel memory support with 204.8 GB/s bandwidth, while the Intel Core i9-9940X provides quad-channel support with 85.3 GB/s. This makes the EPYC more than twice as capable in theoretical memory throughput.

Q: What are the production statuses of these chips?

A: The AMD EPYC 72F3 is listed as "Active" production, released on 2021-03-14. The Intel Core i9-9940X is "End-of-life" production, released earlier on 2018-10-18.

Architecture Differences

The two processors represent fundamentally different design philosophies from their respective manufacturers. The AMD EPYC 72F3 uses the Zen 3 architecture on a 7 nm process node fabricated by TSMC, with a transistor count of 33,200 million spread across an 8x 81 mm² die configuration. This is a server-class silicon built for the AMD Socket SP3 platform, featuring a massive 256 MB shared L3 cache that is characteristic of EPYC Milan parts. The architecture prioritizes memory bandwidth and I/O expansion, evidenced by its eight-channel DDR4 support and 128 PCIe Gen 4 lanes available from the CPU.

In contrast, the Intel Core i9-9940X uses the older Skylake-X architecture on Intel’s 14 nm process, with a single 484 mm² die. This is a desktop HEDT (High-End Desktop) part designed for Intel Socket 2066. Its cache layout differs significantly: while both have 64 KB L1 per core, the Intel part doubles the L2 to 1 MB per core but offers only 19.25 MB of shared L3. The Intel architecture relies on higher clock speeds (4.50 GHz boost versus 4.10 GHz) and more physical cores to achieve performance, rather than the EPYC’s cache-heavy and bandwidth-focused design.

The market segmentation reinforces the architectural split. The EPYC 72F3 is explicitly a Server/Workstation part with ECC memory support, while the Intel i9-9940X is a Desktop part without ECC. The EPYC’s production status is Active, indicating ongoing availability, whereas the Intel part is End-of-life. The Intel chip does have an unlocked multiplier, allowing overclocking, while the EPYC does not — a feature that aligns with Intel’s desktop enthusiast positioning.

Specification Differences

The specification sheets diverge sharply across nearly every field. Core count is the most obvious: Intel leads with 14 cores and 28 threads against AMD’s 8 cores and 16 threads. Clock speeds favor Intel as well, with a 3.30 GHz base and 4.50 GHz boost versus AMD’s 3.70 GHz base and 4.10 GHz boost. The TDP is close, with the EPYC at 180 watts and the Intel part at 165 watts, though the EPYC’s higher TDP comes with dramatically more platform capability.

Memory and I/O are where the AMD part establishes clear dominance. The EPYC 72F3 supports eight-channel DDR4 with 204.8 GB/s bandwidth and ECC memory, plus 128 PCIe Gen 4 lanes. The Intel i9-9940X supports quad-channel DDR4 with 85.3 GB/s, no ECC, and only 44 PCIe Gen 3 lanes. The cache hierarchy also differs: AMD’s 256 MB shared L3 dwarfs Intel’s 19.25 MB, while Intel’s 1 MB per-core L2 doubles AMD’s 512 KB per core.

Process technology and physical attributes tell the rest of the story. AMD uses a 7 nm node from TSMC with 33,200 million transistors across 8 dies of 81 mm² each. Intel uses a 14 nm node from its own foundry on a 484 mm² die, with no transistor count listed. The launch MSRP for the AMD EPYC 72F3 is $2468, while the Intel Core i9-9940X launched at $1387 — a significant price gap that reflects the EPYC’s server positioning. The Intel part is unlocked for overclocking; the AMD part is not.

Head-to-Head Benchmarks

The head-to-head results are remarkably consistent: Intel wins every Cinebench test by exactly 2.7% (deltaPct of -2.7% from AMD’s perspective). In Cinebench R15 multi-core, the Intel i9-9940X scores 2400 versus the EPYC’s 2334. The single-core R15 test shows 338 versus 329. R20 multi-core yields 10000 versus 9728, and R20 single-core is 1411 versus 1373. R23 multi-core finishes at 23810 versus 23164, with single-core at 3361 versus 3270.

The consistency of the 2.7% margin across all tests is telling. It suggests that the Intel part’s advantage is systemic — likely its 6 additional cores and higher boost clock of 4.50 GHz versus 4.10 GHz — rather than workload-specific. The EPYC’s larger L3 cache and newer architecture do not translate into any benchmark win, even in single-core tests where the AMD part’s 3.70 GHz base clock is higher than Intel’s 3.30 GHz.

The broader benchmark picture, however, shows the EPYC with a slight overall edge. Its average benchmark score is 6700, and its nearestRivals list places it 0.6% above the Intel i9-9940X (which scores 6657). Both parts sit at the 62nd percentile of all CPUs. The Intel part has additional Geekbench scores not present for the AMD chip — 10466 multi-core and 1468 single-core — but these do not factor into the head-to-head comparison since the EPYC has no corresponding Geekbench data. In the win tally, the Intel Core i9-9940X takes all six head-to-head tests, with zero wins for the AMD EPYC 72F3.

Where Each One Wins

The Intel Core i9-9940X wins in raw compute benchmarks. Its 14 cores and 28 threads deliver a consistent 2.7% advantage across all Cinebench R15, R20, and R23 tests, both multi-core and single-core. For a user running rendering workloads, video encoding, or any application that scales with core count and high boost clocks, the Intel part is the clear choice based on this data. Its unlocked multiplier also allows overclocking, which could extend its lead further, though no overclocked benchmarks are provided. The Intel part’s end-of-life status is a caveat, but its benchmark performance remains competitive.

The AMD EPYC 72F3 wins in platform capability. While it loses every compute benchmark, it offers eight-channel memory with 204.8 GB/s bandwidth versus Intel’s quad-channel 85.3 GB/s — a 2.4x theoretical advantage. It supports ECC memory, which is critical for data integrity in servers, and provides 128 PCIe Gen 4 lanes against Intel’s 44 Gen 3 lanes. For virtualized environments, database servers, or high-throughput storage systems, these platform features are more important than a 2.7% Cinebench deficit. The EPYC also has a 256 MB L3 cache, which can be a major advantage for working sets that fit within that capacity.

The production status split further defines the use cases. The EPYC 72F3 is Active, meaning it remains a viable procurement choice for new server deployments. The Intel i9-9940X is End-of-life, suitable for existing systems or legacy upgrades but not ideal for new builds. The launch MSRP of $2468 for the EPYC versus $1387 for the Intel part reflects the server-grade features of the former. In summary, the Intel Core i9-9940X is the benchmark winner, but the AMD EPYC 72F3 is the platform winner for server and workstation workloads that demand memory bandwidth, ECC reliability, and massive I/O expansion.