AMD EPYC 7252 vs Intel Core i9-9900KF Comparison

Where Each One Wins

The benchmark data presents a surprisingly one-sided picture. Across every single Cinebench test recorded in the database, the AMD EPYC 7252 finishes ahead of the Intel Core i9-9900KF. This is not a case of one chip winning multi-threaded workloads while the other takes single-threaded tasks; the EPYC 7252 wins both categories in all three Cinebench versions tested. The margin is consistent, with the EPYC holding a 7.9% advantage in five of the six head-to-head comparisons and a slightly narrower 7.8% lead in the remaining test.

The Intel Core i9-9900KF does have one benchmark result the EPYC lacks entirely: Geekbench. The database includes Geekbench multicore and singlecore scores for the Intel part (8970 and 1706, respectively), but no Geekbench results are recorded for the EPYC 7252. This absence does not change the overall outcome, since the recorded Cinebench suite covers both single-thread and multi-thread performance, but it does mean the Intel chip has a wider set of measured results in the database.

Looking at the broader context, both processors sit at nearly the same percentile ranking among all CPUs. The EPYC 7252 lands at the 59th percentile, while the Core i9-9900KF sits at the 58th. Their average benchmark scores are also close: the EPYC averages 4772, and the Intel part averages 4652. The EPYC edges ahead by roughly 2.6% in average score, which aligns with its consistent Cinebench wins. The nearest rival data reinforces this positioning. The EPYC's closest competitor is the Intel Xeon W-1290E at an average score of 4775, a negligible 0.1% difference. The Intel Core i9-9900KF's closest rival is the Intel Core i9-10900F at 4664, again a tiny 0.3% gap. Both chips are firmly placed in a crowded mid-pack of processors where small percentage differences separate many models.

Architecture Differences

The underlying designs could hardly be more different. The AMD EPYC 7252 is built on the Zen 2 architecture, codenamed Rome, using a 7 nm process fabricated by TSMC. The Intel Core i9-9900KF uses the Coffee Lake architecture, specifically Coffee Lake-R, on Intel's 14 nm process. The process node gap is significant: 7 nm versus 14 nm. The EPYC's die is composed of two 74 mm² chiplets, totaling roughly 148 mm², while the Intel die is a single monolithic 180.3 mm² piece. The EPYC packs 7,600 million transistors across its two chiplets; the database does not list a transistor count for the Intel part.

Both processors have 8 cores and 16 threads, so the core count is identical. The differences emerge in cache organization. Each has 64 KB of L1 cache per core, but the L2 cache differs: the EPYC provides 512 KB per core, while the Intel provides 256 KB per core. The L3 configuration is structurally distinct. The EPYC allocates 32 MB per die, and with two dies present, it offers a total of 64 MB of L3. The Intel part shares a single 16 MB L3 across all cores. That is a fourfold difference in total L3 capacity, which can matter for workloads that repeatedly access large working sets.

Memory support also diverges sharply. The EPYC 7252 uses eight-channel DDR4 memory with a peak bandwidth of 85.3 GB/s. The Core i9-9900KF uses dual-channel DDR4, yielding 42.7 GB/s. The EPYC therefore has exactly double the theoretical memory bandwidth. ECC memory is supported on the EPYC but not on the Intel part. PCIe connectivity further separates the two: the EPYC provides Gen 4 with 128 lanes (CPU only), while the Intel part provides Gen 3 with 16 lanes. The EPYC offers eight times the lane count and a newer PCIe generation.

Clock speeds tell a different story. The Intel Core i9-9900KF has a base clock of 3.60 GHz and a boost clock of 5.00 GHz. The EPYC 7252 runs at 3.10 GHz base and 3.20 GHz boost. The Intel chip boosts 1.8 GHz higher, a massive margin that would normally favor it in lightly threaded tasks. Yet the recorded single-core benchmarks show the EPYC ahead, which suggests that the EPYC's architecture extracts more instructions per clock, or that the boost behavior on the Intel part in the test environment did not reach its rated maximum. The EPYC also has a higher thermal design power at 120 W versus 95 W for the Intel, despite the Intel's much higher clock speeds.

Socket and platform targets differ completely. The EPYC uses AMD Socket SP3 and is aimed at the server and workstation market. The Intel part uses Socket 1151 and targets desktop systems. The EPYC's multiplier is locked, while the Intel Core i9-9900KF has an unlocked multiplier for overclocking. The production status also differs: the EPYC is listed as active, while the Intel part is end-of-life. Release dates are close, with the Intel arriving in January 2019 and the EPYC in August 2019.

The Verdict

The data supports a clear split by use case. For server and workstation deployments where memory bandwidth, ECC support, PCIe lane count, and sustained multi-threaded throughput matter, the AMD EPYC 7252 is the appropriate choice. It offers 64 MB of L3 cache, eight-channel memory at 85.3 GB/s, 128 PCIe Gen 4 lanes, and ECC validation. Its 7.9% Cinebench multicore advantage over the Intel part in every recorded version of the test reinforces its suitability for rendering and compute-heavy workloads.

For desktop users who value overclocking and high boost clocks, the Intel Core i9-9900KF has attributes the EPYC lacks: a 5.00 GHz boost, an unlocked multiplier, and a lower 95 W TDP. However, the measured single-thread results do not favor the Intel chip. The EPYC wins Cinebench R15, R20, and R23 single-core by 7.8% or 7.9% in each case. The Intel part's only unique recorded result is Geekbench, where it scores 8970 multicore and 1706 singlecore, but no comparable EPYC Geekbench data exists to draw a direct comparison.

The database shows the EPYC 7252 winning all six head-to-head benchmark comparisons. The Intel Core i9-9900KF wins zero. The average score gap, 4772 versus 4652, is modest but consistent. The EPYC also holds a one-point higher percentile ranking. Neither chip is a runaway leader in the broader market, as both sit near the 58th and 59th percentiles. But within this specific pairing, the EPYC 7252 is the stronger performer according to every recorded Cinebench measurement. The Intel part remains viable for users who need its desktop platform features, but the benchmark evidence does not show a single test where it outperforms the EPYC.

FAQ

Q: Which processor has more cores?

A: Both have exactly 8 cores and 16 threads, so there is no difference in core count.

Q: Does the AMD EPYC 7252 support ECC memory?

A: Yes, the EPYC 7252 supports ECC memory, while the Intel Core i9-9900KF does not.

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

A: The EPYC 7252 offers 85.3 GB/s of memory bandwidth through its eight-channel memory bus. The Core i9-9900KF offers 42.7 GB/s through its dual-channel bus, which is half the bandwidth.

Q: Which processor has the higher boost clock?

A: The Intel Core i9-9900KF has a boost clock of 5.00 GHz, while the EPYC 7252 boosts to only 3.20 GHz.

Q: How much L3 cache does each processor have?

A: The EPYC 7252 has 32 MB per die for a total of 64 MB. The Core i9-9900KF has 16 MB shared across all cores.

Q: Does the Intel Core i9-9900KF have an unlocked multiplier?

A: Yes, the multiplier is unlocked on the Intel part. The EPYC 7252 has a locked multiplier.

Head-to-Head Benchmarks

The largest consistent margin in the head-to-head results is 7.9%, which appears in five of the six tests. In Cinebench R15 multicore, the EPYC scores 1662 against the Intel's 1541, a 7.9% advantage. The R15 single-core test shows the EPYC at 234 and the Intel at 217, a 7.8% edge, the narrowest gap in the set. Cinebench R20 multicore gives the EPYC 6929 versus 6422, again 7.9% ahead. R20 single-core shows 978 versus 906, another 7.9% margin. Cinebench R23 multicore sees the EPYC at 16499 and the Intel at 15292, a 7.9% lead. R23 single-core mirrors the pattern: 2329 versus 2158.

The consistency of these margins is notable. A 7.9% delta repeated across multiple Cinebench versions suggests a stable architectural advantage rather than a workload-specific quirk. Even in single-core tests, where the Intel chip's 5.00 GHz boost should give it a clock speed advantage of 1.8 GHz over the EPYC's 3.20 GHz, the EPYC comes out ahead. The Zen 2 architecture appears to compensate for the clock deficit through higher instructions per clock and possibly more effective boost behavior in the test environment.

The Intel Core i9-9900KF's Geekbench results are its only recorded benchmarks that do not have a direct EPYC counterpart. The Intel scores 8970 in Geekbench multicore and 1706 in singlecore. Without EPYC Geekbench numbers in the database, these results cannot be directly compared. They do, however, contribute to the Intel part's average benchmark score of 4652, which trails the EPYC's 4772.

Specification Differences

The two processors differ in nearly every major specification category. The EPYC 7252 uses the EPYC 7002 series branding, while the Intel part is a Core i9 from the Coffee Lake Refresh generation. The EPYC is built on Zen 2 with the Rome codename, fabricated on a 7 nm process by TSMC. The Intel part uses Coffee Lake architecture with the Coffee Lake-R codename on Intel's 14 nm process. The EPYC's foundry is TSMC; the Intel chip is fabricated by Intel.

The die size differs substantially: the EPYC uses two 74 mm² chiplets, while the Intel part is a single 180.3 mm² die. The EPYC contains 7,600 million transistors, a figure not listed for the Intel part. The socket types are incompatible: the EPYC uses AMD Socket SP3, and the Intel part uses Socket 1151. The market segments also differ, with the EPYC aimed at server and workstation use and the Intel part at desktop use.

Clock speeds favor the Intel chip on paper. The Intel base clock is 3.60 GHz versus 3.10 GHz for the EPYC, and the Intel boost is 5.00 GHz versus 3.20 GHz. Thermal design power goes the other way: the EPYC is rated at 120 W, while the Intel part is rated at 95 W. The EPYC supports eight-channel DDR4 memory with 85.3 GB/s bandwidth; the Intel part supports dual-channel DDR4 with 42.7 GB/s. ECC memory is available only on the EPYC. PCIe capabilities heavily favor the EPYC with Gen 4 and 128 lanes, compared to Gen 3 and 16 lanes for the Intel part.

Neither processor includes integrated graphics. The EPYC 7252 has a locked multiplier, while the Core i9-9900KF is multiplier-unlocked. The production status marks the EPYC as active and the Intel part as end-of-life. The release dates are close, with the Intel chip launching in January 2019 and the EPYC in August 2019. The launch MSRP for the EPYC is $475, and the launch MSRP for the Intel part is $488. The part numbers are listed as 100-000000080 for the EPYC and SRG1ASRFAA for the Intel chip.