AMD EPYC 7H12 vs Intel Core i5-11400 Comparison

The AMD EPYC 7H12 and Intel Core i5-11400 occupy opposite ends of the computing spectrum, yet their average benchmark scores place them within 0.3% of each other. This is a direct result of the EPYC’s massive 64-core, 128-thread configuration versus the i5’s six cores and twelve threads. The data is unambiguous: the EPYC 7H12 wins every single head-to-head benchmark in this comparison, often by margins exceeding 300%, while the i5-11400 offers a much lower 65W TDP and integrated graphics. The choice between them is not a matter of performance parity but of workload appropriateness.

The Verdict

The AMD EPYC 7H12 is the decisive winner for any multi-threaded, server-class workload. With 64 cores and 128 threads, it delivers scores that are roughly four times higher than the i5-11400 in every Cinebench test. For example, in Cinebench R23 multi-core, the EPYC scores 59,188 points versus the i5’s 14,132 points, a 318.8% advantage. This processor is built for database hosting, virtualization, and heavy scientific computing where its 256 MB of shared L3 cache and eight-channel memory bus (204.8 GB/s) allow it to crush parallel tasks. The data shows it is the only choice if your priority is raw throughput.

The Intel Core i5-11400 is the appropriate pick for a standard desktop or entry-level workstation where single-thread responsiveness and power efficiency are more important than core counts. While it loses every benchmark in this comparison, its 65W TDP is dramatically lower than the EPYC’s 280W, making it far easier to cool and run in a standard chassis. It also includes UHD Graphics 730, so no discrete GPU is required for basic display output. If you are building a general-purpose PC for office work, light content creation, or gaming, the i5-11400 is the logical choice despite its performance deficit in this head-to-head.

Do not be misled by the near-identical average benchmark scores (17,120 vs 17,067). Those averages weigh single-thread and multi-thread results equally, hiding the fact that the EPYC wins all six head-to-head tests. The verdict is simple: for servers, take the EPYC; for desktops, take the i5.

Architecture Differences

The EPYC 7H12 is built on TSMC’s 7 nm process node, featuring 3,800 million transistors on a 74 mm² die. It uses the Zen 2 architecture, codenamed Rome, and supports eight-channel DDR4 memory with a massive 204.8 GB/s bandwidth. Its cache hierarchy includes 96 KB of L1 per core, 512 KB of L2 per core, and a shared 256 MB L3 cache. This is a server part designed for AMD Socket SP3, with PCIe Gen 4 support and ECC memory as a standard feature.

The i5-11400 uses Intel’s 14 nm process node with a 276 mm² die size. It is based on the Rocket Lake architecture, codenamed Rocket Lake, and supports dual-channel DDR4 memory with a bandwidth of 51.2 GB/s. Its cache is smaller: 80 KB of L1 per core, 512 KB of L2 per core, and 12 MB of shared L3. This desktop part uses Intel Socket 1200, also supports PCIe Gen 4 (20 lanes from the CPU), but does not support ECC memory. Notably, the i5 integrates UHD Graphics 730, while the EPYC has no integrated graphics at all.

The fundamental difference is scale versus efficiency. The EPYC uses a smaller, denser process node to pack 64 cores, while the i5 uses a larger, older node for six cores. The EPYC’s 3,800 million transistors are spread across the die to enable massive parallelism, while the i5’s transistor count is not listed, but its 276 mm² die is nearly four times larger than the EPYC’s 74 mm², indicating a less dense layout. The EPYC also has over 20 times the L3 cache of the i5, which is critical for keeping 128 threads fed with data.

Where Each One Wins

The EPYC 7H12 wins every benchmark in this dataset, but its victories are concentrated in multi-threaded workloads. In Cinebench R15 multi-core, it scores 5,965 versus the i5’s 1,424, a 318.9% lead. The margin is nearly identical in Cinebench R20 multi-core (24,858 vs 5,935, +318.8%) and Cinebench R23 multi-core (59,188 vs 14,132, +318.8%). These results indicate that the EPYC is the definitive choice for rendering, video encoding, and any task that scales across many cores.

The i5-11400 does not win any benchmark, but its strengths lie in areas not captured by this head-to-head dataset. Its 4.40 GHz boost clock is significantly higher than the EPYC’s 3.30 GHz, which would typically benefit lightly-threaded tasks like web browsing or legacy software. It also has a 65W TDP, which is 215W lower than the EPYC, making it suitable for compact, low-noise builds. The i5’s integrated graphics and lack of ECC support position it as a consumer part, whereas the EPYC’s lack of graphics and ECC support position it as a server part.

For real-world use, the EPYC wins in server racks where 128 threads are used for virtualization or database queries. The i5 wins in a home or office desktop where its power draw is manageable, its integrated graphics provide display output, and its higher boost clock improves single-thread latency.

FAQ

Q: Which processor is faster in multi-core performance?

A: The AMD EPYC 7H12 is overwhelmingly faster. In Cinebench R23 multi-core, it scores 59,188 points versus the Intel Core i5-11400’s 14,132 points, a 318.8% advantage.

Q: Does the Intel Core i5-11400 beat the EPYC in any benchmark?

A: No. The head-to-head data shows the EPYC 7H12 winning all six tests, including single-core Cinebench tests where the EPYC leads by 318.8% to 321% despite the i5’s higher boost clock.

Q: Can the Intel Core i5-11400 be used without a dedicated graphics card?

A: Yes. The i5-11400 includes integrated UHD Graphics 730, whereas the AMD EPYC 7H12 has no integrated graphics and requires a separate GPU for display output.

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

A: The EPYC 7H12 supports eight-channel DDR4 with 204.8 GB/s of bandwidth, while the i5-11400 supports dual-channel DDR4 with 51.2 GB/s. This is a four-fold difference in theoretical memory throughput.

Q: Which processor has a larger cache?

A: The EPYC 7H12 has 256 MB of shared L3 cache, compared to the i5-11400’s 12 MB. The EPYC also has 96 KB of L1 per core versus the i5’s 80 KB per core.

Q: Are both processors still in production?

A: No. The EPYC 7H12 is listed as Active, while the Intel Core i5-11400 is listed as End-of-life.

Head-to-Head Benchmarks

The head-to-head data reveals a consistent and massive performance gap. The EPYC 7H12 wins all six tests, with deltas ranging from 318.8% to 321%. The smallest win is in Cinebench R23 multi-core and single-core, where the EPYC scores 59,188 and 8,355, respectively, versus the i5’s 14,132 and 1,995. That is a 318.8% lead in both cases.

The largest delta is in Cinebench R15 single-core, where the EPYC scores 842 versus the i5’s 200, a 321% advantage. This is surprising because the i5 has a higher boost clock (4.40 GHz vs 3.30 GHz), yet the EPYC’s Zen 2 architecture delivers superior instructions per clock in this test. In Cinebench R20 single-core, the EPYC scores 3,509 versus 837, a 319.2% lead.

The multi-core results are equally lopsided. In Cinebench R15 multi-core, the EPYC scores 5,965 versus 1,424 (+318.9%). In Cinebench R20 multi-core, the EPYC scores 24,858 versus 5,935 (+318.8%). The pattern is clear: the EPYC’s 64 cores and 128 threads simply overwhelm the i5’s 6 cores and 12 threads in every workload tested. The i5-11400’s best result is its Cinebench R23 multi-core score of 14,132, which is still less than a quarter of the EPYC’s 59,188.

Specification Differences

The most significant specification difference is core count: the EPYC 7H12 has 64 cores and 128 threads, while the i5-11400 has 6 cores and 12 threads. This explains the massive benchmark deltas. The base clocks are identical at 2.60 GHz, but the i5 boosts to 4.40 GHz versus the EPYC’s 3.30 GHz.

Power draw is another major divider. The EPYC has a 280W TDP, while the i5 is rated at 65W. This 215W difference dictates cooling requirements and operating costs. The EPYC uses a larger socket (AMD Socket SP3) versus Intel Socket 1200 for the i5.

Cache sizes differ drastically. The EPYC offers 96 KB of L1 per core, 512 KB of L2 per core, and 256 MB of shared L3. The i5 offers 80 KB of L1 per core, 512 KB of L2 per core, and 12 MB of shared L3. Memory support also differs: the EPYC uses eight-channel DDR4 with 204.8 GB/s bandwidth, while the i5 uses dual-channel DDR4 with 51.2 GB/s.

The EPYC supports ECC memory; the i5 does not. The EPYC has no integrated graphics; the i5 includes UHD Graphics 730. The process nodes also differ: the EPYC is on TSMC’s 7 nm process with 3,800 million transistors on a 74 mm² die, while the i5 is on Intel’s 14 nm process with a 276 mm² die. Finally, the EPYC is active in production, while the i5 is end-of-life. The i5 has a launch MSRP of $182; the EPYC has no listed launch MSRP.