AMD EPYC 7H12 vs Intel Core i5-1240U Comparison

The benchmark data presents a stark contrast: the AMD EPYC 7H12 is a dominant force in multi-threaded workloads, while the Intel Core i5-1240U is a low-power mobile processor. Across every shared Cinebench test, the EPYC 7H12 wins decisively, with the largest margin reaching 649% in multi-core rendering. Conversely, the i5-1240U’s strengths lie in its integrated graphics and specific PassMark tests, though these are not available for direct comparison in the head-to-head data.

Head-to-Head Benchmarks

The most striking result is in Cinebench R23 multi-core, where the AMD EPYC 7H12 scores 59,188 against the Intel Core i5-1240U’s 7,902. This represents a 649% advantage for the EPYC, a figure that underscores the difference between a 64-core server processor and a 10-core mobile chip. The single-core R23 result is similarly one-sided: the EPYC scores 8,355 versus 1,559, a 435.9% lead. These aren’t marginal wins; they are category-level separations.

The pattern continues in Cinebench R20. In the multi-core test, the EPYC 7H12 posts 24,858, which is 395.9% higher than the i5-1240U’s 5,013. The single-core R20 score for the EPYC is 3,509, beating the Intel part’s 707 by 396.3%. The R15 results follow the same trajectory: the EPYC’s multi-core score of 5,965 is 380.3% above the i5-1240U’s 1,242, and its single-core score of 842 is 272.6% above the Intel chip’s 226.

Across all six head-to-head benchmarks, the EPYC 7H12 wins. The smallest margin of victory is the 272.6% lead in Cinebench R15 single-core, which still represents a massive performance gap. The data does not show a single test where the i5-1240U takes the lead. The average benchmark score for the EPYC is 17,120, compared to 16,957 for the i5-1240U, but this aggregate hides the fact that the EPYC’s score is driven by its colossal multi-core output, while the i5’s score is buoyed by its PassMark results.

Architecture Differences

The architectural divide is fundamental. The AMD EPYC 7H12 is built on the Zen 2 architecture (codename Rome) using a 7 nm process from TSMC. It houses 64 cores and 128 threads, with a die size of 74 mm² and 3,800 million transistors. Its cache hierarchy is extensive: 96 KB of L1 per core, 512 KB of L2 per core, and a massive 256 MB of shared L3 cache. This is a server-class design aimed at throughput and parallel processing.

In contrast, the Intel Core i5-1240U uses the Alder Lake architecture (codename Alder Lake-U) on Intel’s 10 nm process. It has 10 cores and 12 threads, with 80 KB of L1 per core and 1.25 MB of L2 per core, but only 12 MB of shared L3 cache. The i5-1240U is a mobile part, designed for efficiency and integration. It includes Iris Xe 80EU integrated graphics, a feature entirely absent from the EPYC 7H12. The EPYC also supports ECC memory, while the i5-1240U does not.

The memory controllers differ sharply. The EPYC 7H12 supports DDR4 memory over an eight-channel interface, providing 204.8 GB/s of bandwidth. The i5-1240U supports both DDR4 and DDR5, but only over a dual-channel bus, and no memory bandwidth figure is available in the data. Both processors use PCIe Gen 4, but the scale of the EPYC’s platform, with its Socket SP3, is intended for multi-socket servers, whereas the i5-1240U is a BGA 1781 mobile chip.

Where Each One Wins

The AMD EPYC 7H12 wins in every metric where both CPUs have comparable data. Its Cinebench scores, across R15, R20, and R23, are all several times higher than the i5-1240U’s. This makes it the clear choice for workloads like 3D rendering, scientific simulation, and any task that can utilize its 64 cores and 128 threads. The 256 MB L3 cache and 204.8 GB/s memory bandwidth further cement its position for data-heavy server workloads. Its percentile ranking of 71 against all CPUs, while lower than its raw scores might suggest, reflects that it is compared against other high-end server parts.

The Intel Core i5-1240U’s wins are not visible in the head-to-head data but appear in its broader benchmark suite. It scores 143,102 in PassMark data compression and 8,964 in data encryption. It also posts 29,726 in floating point math and 44,968 in integer math. These PassMark results are not compared directly to the EPYC, so they cannot be used to declare a victory, but they do show that the i5-1240U is a capable processor for specific tasks like compression and encryption. Its integrated Iris Xe 80EU graphics is a decisive advantage for a mobile system that needs to drive a display without a discrete GPU. The EPYC 7H12 has no integrated graphics at all.

Specification Differences

The specifications diverge on nearly every fundamental point. The EPYC 7H12 has 64 cores and 128 threads, while the i5-1240U has 10 cores and 12 threads. The EPYC’s base clock is 2.60 GHz, and its boost clock is 3.30 GHz; the i5-1240U has a base clock of 1100.00 MHz and a boost clock of 4.40 GHz. The Intel part has a higher boost clock, but the EPYC’s core count overwhelms that advantage.

The TDP figures are in different universes: the EPYC 7H12 consumes 280 W, while the i5-1240U draws just 9 W. The EPYC uses an AMD Socket SP3, while the i5 uses Intel BGA 1781. The process nodes are 7 nm for the EPYC and 10 nm for the i5. The cache structures are incomparable: the EPYC has 256 MB of L3 versus the i5’s 12 MB. The memory support is DDR4 only for the EPYC (eight-channel), versus DDR4/DDR5 for the i5 (dual-channel). The EPYC supports ECC memory; the i5 does not. The i5 has integrated graphics; the EPYC has none. The market segments are Server/Workstation for the EPYC and Mobile for the i5.

FAQ

Q: Which processor is faster in multi-core Cinebench R23?

A: The AMD EPYC 7H12 scores 59,188, which is 649% higher than the Intel Core i5-1240U’s 7,902.

Q: Does the Intel Core i5-1240U have a higher boost clock than the AMD EPYC 7H12?

A: Yes. The i5-1240U has a boost clock of 4.40 GHz, while the EPYC 7H12 has a boost clock of 3.30 GHz.

Q: What is the TDP difference between these two processors?

A: The AMD EPYC 7H12 has a TDP of 280 W, while the Intel Core i5-1240U has a TDP of 9 W.

Q: Which processor has more L3 cache?

A: The AMD EPYC 7H12 has 256 MB of shared L3 cache, compared to the Intel Core i5-1240U’s 12 MB of shared L3 cache.

Q: Does the AMD EPYC 7H12 support ECC memory?

A: Yes, the EPYC 7H12 supports ECC memory. The Intel Core i5-1240U does not support ECC memory.

Q: Which processor includes integrated graphics?

A: The Intel Core i5-1240U includes Iris Xe 80EU integrated graphics. The AMD EPYC 7H12 has no integrated graphics.

The Verdict

The data dictates a clear split. The AMD EPYC 7H12 is for workloads that demand raw compute throughput. Its 64 cores and 128 threads, combined with 256 MB of L3 cache and 204.8 GB/s of memory bandwidth, make it the only choice for multi-threaded server tasks. The benchmark results show it leading by 395.9% to 649% in multi-core Cinebench tests, and even its single-core scores are 272.6% to 435.9% ahead. Anyone processing large datasets, rendering frames, or running virtualized environments should select the EPYC 7H12 without hesitation.

The Intel Core i5-1240U is for a different purpose entirely. With a 9 W TDP and integrated graphics, it is built for battery-powered mobile systems. While it loses every direct Cinebench comparison, its PassMark scores for data compression (143,102) and encryption (8,964) show it has specific strengths. It is not a competitor to the EPYC in raw power; it is a complementary part for a portable system that needs modest performance and integrated display output. If the task is high-core-count computing, the EPYC 7H12 wins unconditionally. If the task is efficient mobile operation, the i5-1240U is the only one of the two that can function in that role.