AMD EPYC 7281 vs Intel Core i9-9820X Comparison

The database pits two very different silicon philosophies against each other here: AMD's EPYC 7281, a Zen-based server processor from the Naples generation, and Intel's Core i9-9820X, a Skylake-X desktop flagship from the 9th Gen X-Series. Despite serving different market segments, the recorded data places them within touching distance of each other, with the EPYC sweeping every benchmark. The margin is consistent, roughly five percent across the board, which makes this one of the more orderly comparisons in the database. Both parts sit at the 60th percentile against all CPUs in the collection.

Head-to-Head Benchmarks

The head-to-head data covers three Cinebench generations, each with single-core and multi-core results, and the AMD EPYC 7281 wins all six tests. The gap never varies much, which is rare and worth noting.

In Cinebench R15 multi-core, the EPYC 7281 scores 1852 against 1759 for the Core i9-9820X, a 5.3 percent advantage. Single-core tells the same story: 261 versus 248, a 5.2 percent win for AMD. That single-core result is the more surprising of the two, because the Intel chip carries substantially higher clock speeds on paper. The data shows the EPYC holding the lead regardless.

Cinebench R20 repeats the pattern exactly. Multi-core finishes at 7718 for the EPYC and 7332 for the i9-9820X, again 5.3 percent apart. Single-core lands at 1089 versus 1034, a 5.3 percent margin. Cinebench R23, the heaviest workload in the set, closes with 18377 against 17459 multi-core and 2594 against 2464 single-core, both 5.3 percent in AMD's favor.

The uniformity matters. A five percent edge sustained across six tests spanning three benchmark generations indicates the result is structural, driven by core count and per-core throughput, rather than a fluke in any single workload. The i9-9820X posts perfectly respectable numbers, but the recorded data shows it losing every contest.

Context from the rivals list sharpens the picture. The EPYC 7281's average benchmark score of 5315 sits level with the Intel Core i9-10900KF at 5316, a hair ahead of the Ryzen Threadripper 1920X at 5306, and marginally ahead of the Core i9-9900X at 5301. The i9-9820X averages 5049, dead even with the Core i9-12900TE at 5050, and within half a percent of the Xeon Gold 6334 and Xeon W-2155. In short, the two CPUs occupy adjacent tiers, and the EPYC holds the higher tier of the pair.

FAQ

Q: Does the AMD EPYC 7281 win any benchmark against the Core i9-9820X?

A: It wins all six recorded benchmarks. The margin is 5.3 percent in five of the six tests and 5.2 percent in Cinebench R15 single-core, where the EPYC scores 261 against 248.

Q: Which CPU has higher clock speeds?

A: The Core i9-9820X, with a 3.30 base and 4.20 boost clock, well above the EPYC 7281's 2.10 base and 2.70 boost. Despite this, the EPYC leads every performance test in the database, with its 16 cores and 32 threads offsetting the frequency deficit against the Intel chip's 10 cores and 20 threads.

Q: Do both CPUs support ECC memory?

A: Only the EPYC 7281. The i9-9820X is recorded without ECC support, which matters for workstation and server workloads where memory integrity is required.

Q: How does memory bandwidth compare?

A: The EPYC 7281 delivers 170.6 GB/s through an eight-channel DDR4 bus, exactly double the i9-9820X's 85.3 GB/s on a quad-channel DDR4 bus.

Q: Are both processors still in production?

A: No. The database lists the EPYC 7281 as Active, while the Core i9-9820X is marked End-of-life.

Q: Is either CPU multiplier unlocked?

A: Yes, both carry a true multiplierUnlocked flag, so both allow overclocking.

Architecture Differences

Both processors are built on 14 nm process technology, but by different manufacturers: GlobalFoundries for the AMD part and Intel for its own. The EPYC 7281 uses the Zen architecture under the Naples codename, while the i9-9820X uses Skylake under the Skylake-X codename.

The design philosophies diverge sharply. AMD's Naples approach packs 16 cores and 32 threads at low clocks, 2.10 base and 2.70 boost, targeting sustained throughput. Intel's Skylake-X goes the other way: 10 cores and 20 threads running much faster, 3.30 base and 4.20 boost. The Zen design compensates for the frequency gap with 96 KB of L1 cache per core and 32 MB of shared L3, against Skylake-X's 64 KB of L1 per core and 16.5 MB of shared L3. Intel instead gives each core a larger 1 MB of L2, versus 512 KB per core on the AMD side.

The platform layer favors AMD heavily for bandwidth-sensitive work. The EPYC's eight-channel DDR4 memory subsystem provides 170.6 GB/s, double the Intel chip's 85.3 GB/s from quad-channel DDR4. Both support PCIe Gen 3, with the i9-9820X explicitly listed at 44 CPU lanes. Both have an unlocked multiplier and neither ships with integrated graphics. The EPYC package is also far larger in silicon terms: the database records 4800 million transistors on a 213 mm² die, while no transistor or die-size figures are recorded for the Intel part.

Specification Differences

The fields where these two differ:

• Market segment: EPYC 7281 is Server/Workstation; i9-9820X is Desktop.
• Cores/threads: 16/32 for AMD versus 10/20 for Intel.
• Clocks: 2.10 base and 2.70 boost for AMD versus 3.30 base and 4.20 boost for Intel.
• TDP: 170 W for the EPYC against 165 W for the i9-9820X, a nearly identical envelope.
• Socket: AMD Socket SP3 versus Intel Socket 2066, so no platform overlap.
• Cache: 96 KB L1 per core and 32 MB shared L3 for AMD; 64 KB L1 per core, 1 MB L2 per core, and 16.5 MB shared L3 for Intel. AMD's L2 is 512 KB per core.
• Memory bus and bandwidth: eight-channel, 170.6 GB/s versus quad-channel, 85.3 GB/s. Both use DDR4.
• ECC: supported on the EPYC only.
• PCIe: Gen 3 on both, with 44 CPU lanes recorded for the i9-982X's sibling data as "Gen 3, 44 Lanes (CPU only)".
• Status: Active versus End-of-life.
• Release timing: the EPYC shipped mid-2017, the i9-9820X in late 2018.
• Launch MSRP: $889 for the Core i9-9820X; no MSRP is recorded for the EPYC 7281.
• Part number: SREZ8 for the Intel part; none recorded for the AMD.

Where they match: both are 14 nm, both support DDR4, both lack integrated graphics, both have unlocked multipliers, and both sit at the 60th percentile versus all CPUs in the database.

The Verdict

The recorded data makes this straightforward. The EPYC 7281 wins every benchmark, by five to five and a half percent, holds double the memory bandwidth, carries ECC support, and remains in active production. Its average score of 5315 edges the i9-9820X's 5049. For any workload measured here, rendering included, the AMD part is the stronger performer despite running at far lower clocks.

The i9-9820X's case rests on different ground. It is a desktop part on Socket 2066, with much higher clock speeds (4.20 boost versus 2.70), more per-core L2 cache, and 44 PCIe Gen 3 lanes from the CPU. For lightly threaded desktop use where frequency matters most, its 2594-class single-core deficit of 5.3 percent is small in absolute terms. But it is end-of-life, lacks ECC, and loses in every recorded test, so the data cannot favor it on performance grounds.

Choose the EPYC 7281 for throughput, memory bandwidth, and platform longevity. Choose the i9-9820X only if a Socket 2066 desktop build with high clocks is the specific requirement.

Where Each One Wins

EPYC 7281 wins:

• All rendering workloads. Every Cinebench result favors AMD: 1852 vs 1759 (R15 multi), 7718 vs 7332 (R20 multi), 18377 vs 17459 (R23 multi).
• Single-threaded work too, 261 vs 248 in R15 and 2594 vs 2464 in R23, so even frequency-sensitive tasks land on the AMD side in these tests.
• Memory-heavy tasks, where 170.6 GB/s of eight-channel bandwidth doubles the Intel platform's 85.3 GB/s.
• ECC-dependent deployments, since the i9-9820X offers no ECC support.

Core i9-9820X wins:

• Clock-sensitive desktop scenarios, with a 4.20 boost clock well above the EPYC's 2.70, relevant where per-thread responsiveness outweighs aggregate throughput.
• Large peripheral expansion from the CPU, with 44 PCIe Gen 3 lanes recorded.
• Compact mainstream desktop builds, being a Desktop-segment Socket 2066 part rather than a server SP3 platform.

The scoreboard ends 6-0 in AMD's favor across the benchmark suite, with the i9-9820X's advantages confined to specification traits the benchmark set does not measure.