AMD EPYC 7642 vs Intel Xeon 658X Comparison

The AMD EPYC 7642 and Intel Xeon 658X represent two distinct philosophies for server and workstation processing. The EPYC 7642 is a 48-core Zen 2 part from the EPYC 7002 series, while the Xeon 658X is a 24-core Granite Rapids part. Benchmark data shows a clear split: the Intel chip dominates in raw compute and single-threaded tasks, while the AMD chip counters with significant wins in specific data-handling workloads. This analysis breaks down the head-to-head results, architectural differences, and which processor is the better fit for specific workloads.

Head-to-Head Benchmarks

The most striking trend in the head-to-head data is the Intel Xeon 658X's dominance in Cinebench tests. Across all six Cinebench benchmarks, the Xeon 658X wins with a consistent 20% margin. In Cinebench R23 multicore, the Xeon scores 62466 against the EPYC's 49975, a -20% delta. The single-core results follow the same pattern, with the Xeon scoring 8818 in R23 single-core versus 7055 for the EPYC, also a 20% gap. This consistency suggests the Xeon's higher clock speeds and newer architecture provide a fundamental performance advantage in these render-heavy workloads. The same 20% margin appears in the PassMark multithread test, where the Xeon scores 73490 versus the EPYC's 58795.

The PassMark suite reveals a more nuanced picture. The EPYC 7642 secures four decisive wins, with its largest margin in data encryption. The EPYC scores 86397 in PassMark data encryption, a massive 65% lead over the Xeon's 52357. This is the single largest delta in the entire comparison. Data compression also favors the EPYC, with a score of 1195584 versus 1062062, an 11.5% advantage. Integer math is another EPYC win, scoring 305303 against the Xeon's 263995, a 15.6% lead. Random string sorting rounds out the EPYC's wins, with a score of 114871 versus 103028, an 11.5% margin.

The Xeon 658X wins the remaining PassMark tests, though with varying margins. The largest single-threaded gap is in PassMark single-thread score, where the Xeon's 3728 is 45% higher than the EPYC's 2052. This is a dramatic difference that highlights the Xeon's superior per-core performance. The Xeon also wins in find prime numbers (649 vs 496, a 23.6% lead), physics (6470 vs 5098, a 21.2% lead), and extended instructions (84626 vs 68841, an 18.7% lead). Floating-point math is a closer contest, with the Xeon scoring 210480 versus the EPYC's 181887, a 13.6% margin.

Overall, the Xeon 658X wins 13 of the 17 head-to-head benchmarks, while the EPYC 7642 wins 4. The average benchmark score tells a similar story, with the EPYC averaging 124006 and the Xeon averaging 116060. However, the EPYC's average is skewed by its massive data encryption score. Both processors sit at the 97th percentile against all CPUs, confirming they are top-tier parts.

The Verdict

The data points to a clear choice for most users: the Intel Xeon 658X is the superior processor for general computing and single-threaded performance. Its consistent 20% lead across all Cinebench tests and its 45% lead in single-threaded PassMark make it the better option for workloads that rely on clock speed and per-core efficiency. The Xeon also wins in floating-point math, physics, and extended instructions, making it a versatile performer.

The AMD EPYC 7642 is the specialist's choice. Its 65% lead in data encryption is a standout result that suggests it has dedicated hardware acceleration for encryption workloads. Its wins in data compression, integer math, and random string sorting point to a processor that excels in data-heavy, integer-based tasks. For servers handling encrypted traffic, database compression, or similar workloads, the EPYC's advantages could be decisive.

The EPYC's rival comparison data provides context. Its average score of 124006 is nearly identical to the Ryzen Threadripper PRO 5975WX (124171, a -0.1% delta) and slightly ahead of the Xeon 6730P (124756, a -0.6% delta). It trails the EPYC 9354 by 2.2% but beats the EPYC 9384X by 3%. The Xeon 658X's average of 116060 is close to the EPYC 9255 (116388, a -0.3% delta) and the Xeon 6527P (115190, a 0.8% delta). This shows both processors are well-positioned against their immediate competitors, though the Xeon's average is dragged down by its weak encryption score.

Architecture Differences

The two processors are built on fundamentally different architectures. The AMD EPYC 7642 uses the Zen 2 architecture with the Rome codename, fabricated on a 7nm TSMC process. It has 48 cores and 96 threads. The Intel Xeon 658X uses the Granite Rapids architecture, fabricated on a 5nm Intel process, with 24 cores and 48 threads. The Xeon's die size is listed as 2x 598 mm², while the EPYC has a 74 mm² die and 3,800 million transistors.

Cache configurations differ significantly. The EPYC 7642 has 96 KB of L1 cache per core, 512 KB of L2 per core, and a massive 256 MB of shared L3 cache. The Xeon 658X has 112 KB of L1 per core, 2 MB of L2 per core, and 144 MB of shared L3 cache. The EPYC's larger L3 cache is a key architectural trait of the Zen 2 design, while the Xeon's larger per-core L2 cache points to a different optimization strategy.

Memory support is a major differentiator. The EPYC 7642 supports DDR4 memory with an eight-channel bus and 204.8 GB/s bandwidth. The Xeon 658X supports DDR5 memory with an eight-channel bus and 409.6 GB/s bandwidth, exactly double the EPYC's bandwidth. Both support ECC memory. PCIe capabilities also differ: the EPYC uses Gen 4, while the Xeon uses Gen 5 with 128 lanes (CPU only).

Specification Differences

The core count is the most obvious difference, with the EPYC 7642 offering 48 cores and 96 threads versus the Xeon 658X's 24 cores and 48 threads. The Xeon compensates with much higher clock speeds: a 3.00 GHz base and 4.90 GHz boost, compared to the EPYC's 2.40 GHz base and 3.40 GHz boost. The Xeon also has a higher TDP at 250 watts versus 225 watts for the EPYC.

Socket compatibility is a key practical difference. The EPYC 7642 uses AMD Socket SP3, while the Xeon 658X uses Intel Socket 4710. This means they are not interchangeable in existing systems. The Xeon 658X has a launch MSRP of $1699. The EPYC 7642 has no launch MSRP listed.

The Xeon 658X has an unlocked multiplier, while the EPYC 7642 does not. The Xeon also lists integrated graphics as "N/A," while the EPYC has no integrated graphics listed. The Xeon's part number is SA2D2, while the EPYC's is 100-000000074. The EPYC was released on 2019-08-06, while the Xeon was released on 2026-02-01, making the Xeon a much newer part.

FAQ

Q: Which processor has a higher core count?

A: The AMD EPYC 7642 has 48 cores and 96 threads, while the Intel Xeon 658X has 24 cores and 48 threads.

Q: What is the performance difference in single-threaded tasks?

A: The Intel Xeon 658X leads by 45% in the PassMark single-thread test, scoring 3728 versus the EPYC's 2052. In Cinebench R23 single-core, the Xeon also leads by 20%, scoring 8818 versus 7055.

Q: Does the AMD EPYC 7642 win any benchmarks?

A: Yes, the EPYC 7642 wins 4 of 17 head-to-head benchmarks. Its biggest win is in PassMark data encryption, where it scores 86397 versus the Xeon's 52357, a 65% lead. It also wins in data compression, integer math, and random string sorting.

Q: What memory types do these processors support?

A: The AMD EPYC 7642 supports DDR4 memory, while the Intel Xeon 658X supports DDR5 memory. Both use an eight-channel memory bus, but the Xeon has 409.6 GB/s bandwidth versus the EPYC's 204.8 GB/s.

Q: What are the process nodes for each processor?

A: The AMD EPYC 7642 uses a 7nm TSMC process, while the Intel Xeon 658X uses a 5nm Intel process.

Q: Do both processors support ECC memory?

A: Yes, both the AMD EPYC 7642 and the Intel Xeon 658X support ECC memory.

Where Each One Wins

The Intel Xeon 658X is the clear winner for single-threaded and lightly-threaded workloads. Its 45% lead in PassMark single-thread and 20% lead in all Cinebench tests make it the better choice for applications that don't scale well across many cores. Its wins in floating-point math, physics, and extended instructions also make it suitable for scientific computing and simulation workloads. The Xeon's higher boost clock of 4.90 GHz and DDR5 memory support with 409.6 GB/s bandwidth give it a significant edge in latency-sensitive tasks.

The AMD EPYC 7642 wins in specific data-handling scenarios. Its 65% lead in data encryption is a standout that makes it the obvious pick for encrypted storage, VPN servers, or any workload that relies heavily on cryptographic operations. Its wins in integer math, data compression, and random string sorting make it a strong candidate for database workloads, file compression servers, and other integer-heavy applications. The EPYC's 48 cores and 96 threads also provide more parallel processing capability, even if the Xeon's higher clocks often compensate in multi-threaded tests.

For multi-threaded rendering, the Xeon 658X is the winner despite having half the cores. Its 20% lead in Cinebench R23 multicore (62466 vs 49975) shows that clock speed and architecture efficiency can overcome a 2x core deficit. The Xeon's 4.90 GHz boost clock is the key factor here. For workloads that are memory-bandwidth bound, the Xeon's DDR5 support with double the bandwidth of the EPYC's DDR4 is a decisive advantage. The EPYC's larger 256 MB L3 cache vs the Xeon's 144 MB may help in cache-sensitive workloads, but the benchmark data shows the Xeon generally comes out ahead in compute-heavy tasks.