AMD EPYC 7261 vs AMD Ryzen 3 5400U Comparison

This is a comparison of two very different AMD processors: the Ryzen 3 5400U, a 15 W mobile chip built for thin-and-light laptops, and the EPYC 7261, a 170 W server processor designed for datacenter workloads. The data shows a complete sweep for the EPYC in every single benchmark, but the margin is surprisingly narrow. The benchmarks here reveal that while the EPYC 7261 wins all six head-to-head tests, the 5400U is not left in the dust; the performance gap is consistently around one to two percent across the board.

Head-to-Head Benchmarks

The most striking result is that the EPYC 7261 wins every single benchmark test, but by a razor-thin margin. In the Cinebench R15 multicore test, the EPYC scores 954 against the Ryzen’s 942, a delta of -1.3% for the Ryzen. The single-core R15 result follows the same pattern: the EPYC’s 134 beats the Ryzen’s 132, a -1.5% difference. These are not the kind of margins that would be noticeable in everyday use, but they are consistent.

Moving to Cinebench R20, the multicore scores are 3979 for the EPYC and 3927 for the Ryzen. That is a -1.3% delta. In single-core R20, the EPYC scores 561 versus 554, a -1.2% delta. The final pair of tests, Cinebench R23, shows the same story: the EPYC’s 9476 multicore score edges out the Ryzen’s 9350 (-1.3%), and its 1337 single-core score beats the Ryzen’s 1320 (-1.3%). In every case, the EPYC is the winner, but the largest gap is just 1.5% in the R15 single-core test.

What makes this interesting is the hardware behind these scores. The EPYC 7261 has double the cores (8 versus 4) and double the threads (16 versus 8). It also has a much larger L3 cache (32 MB versus 8 MB) and a significantly higher TDP (170 W versus 15 W). Yet it only leads by about 1.3% in multi-core tests. This suggests that the Ryzen 3 5400U’s Zen 3 architecture is far more efficient per core than the EPYC’s older Zen architecture. The Ryzen also has a much higher boost clock (4.00 GHz versus 2.90 GHz), which helps close the gap in single-threaded workloads.

The EPYC’s wins are real, but they are not dominant. For a processor with twice the core count and more than ten times the TDP, the performance advantage is almost negligible in these benchmarks. The Ryzen 3 5400U is effectively matching a server chip from 2018, which says a lot about how far mobile processors have come.

The Verdict

The data is clear: the AMD EPYC 7261 is the faster processor in every benchmark recorded. It wins all six head-to-head tests, with scores ranging from 1.2% to 1.5% higher than the Ryzen 3 5400U. If you are strictly looking at raw performance numbers, the EPYC is the pick. It delivers more Cinebench points in both single-core and multi-core workloads, and it does so consistently.

However, the context matters. The EPYC 7261 achieves this with 8 cores, 16 threads, 32 MB of L3 cache, and a 170 W TDP. The Ryzen 3 5400U does nearly the same work with 4 cores, 8 threads, 8 MB of L3 cache, and a 15 W TDP. That is a massive efficiency difference. The Ryzen is a mobile processor with an integrated Radeon Vega 6 GPU, while the EPYC is a server chip with no integrated graphics and requires a platform with eight-channel memory support.

Who should pick which? From the benchmark data alone, the EPYC 7261 is the choice if you need the absolute highest scores. It wins every test. But the Ryzen 3 5400U is the choice if you are building a system where power draw, heat, and physical size are constraints. The data shows that the Ryzen offers about 98.7% of the EPYC’s performance in these tests while using only a fraction of the power. For a laptop or a compact desktop, the Ryzen is the obvious pick. For a server rack where power is not a concern and you need the extra cores for non-benchmark workloads, the EPYC has the edge.

FAQ

Q: Which processor has a higher single-core score in Cinebench R23?

A: The AMD EPYC 7261 wins with a score of 1337, while the AMD Ryzen 3 5400U scores 1320. The delta is -1.3% for the Ryzen.

Q: How big is the multicore performance gap in Cinebench R20?

A: The EPYC 7261 scores 3979, and the Ryzen 3 5400U scores 3927. The EPYC leads by 1.3%.

Q: Does the Ryzen 3 5400U have integrated graphics?

A: Yes, it includes Radeon Vega 6 integrated graphics. The EPYC 7261 has no integrated graphics at all.

Q: What is the difference in core and thread counts?

A: The EPYC 7261 has 8 cores and 16 threads. The Ryzen 3 5400U has 4 cores and 8 threads. The EPYC has exactly double the counts.

Q: Which processor supports ECC memory?

A: The AMD EPYC 7261 supports ECC memory. The Ryzen 3 5400U does not support ECC memory.

Q: How do the processors compare in terms of memory bandwidth?

A: The EPYC 7261 has an eight-channel memory bus with 170.6 GB/s bandwidth. The Ryzen 3 5400U has a dual-channel bus with 51.2 GB/s bandwidth.

Specification Differences

The two processors differ in nearly every core specification. The Ryzen 3 5400U has 4 cores and 8 threads, while the EPYC 7261 has 8 cores and 16 threads. The Ryzen has a base clock of 2.60 GHz and a boost clock of 4.00 GHz. The EPYC has a lower base clock of 2.50 GHz and a much lower boost clock of 2.90 GHz. The TDP also differs drastically: the Ryzen is rated at 15 W, while the EPYC is rated at 170 W.

The sockets are incompatible. The Ryzen uses AMD Socket FP6, while the EPYC uses AMD Socket SP3. The Ryzen’s cache configuration is 64 KB of L1 per core, 512 KB of L2 per core, and 8 MB of shared L3. The EPYC has 96 KB of L1 per core, 512 KB of L2 per core, and 32 MB of shared L3. Memory support also differs: both support DDR4, but the Ryzen uses a dual-channel bus with 51.2 GB/s bandwidth, while the EPYC uses an eight-channel bus with 170.6 GB/s bandwidth. The EPYC supports ECC memory; the Ryzen does not. The Ryzen has Radeon Vega 6 integrated graphics, while the EPYC has none. The Ryzen is unlocked for multiplier adjustments? No, it is not. The EPYC has an unlocked multiplier; the Ryzen does not.

Architecture Differences

The architectural gap is substantial. The Ryzen 3 5400U is built on the Zen 3 architecture, codenamed Cezanne-U, and is part of the 5000 series. It uses a 7 nm process node from TSMC, with 10,700 million transistors on a 180 mm² die. The EPYC 7261 is built on the original Zen architecture, codenamed Naples, and is part of the EPYC 7001 series. It uses a 14 nm process node from GlobalFoundries, with 4,800 million transistors on a 213 mm² die. This means the Ryzen packs more than twice the transistor count into a smaller die, which explains its efficiency advantage.

The cache hierarchy differs as well. The Ryzen has 64 KB of L1 per core, while the EPYC has 96 KB of L1 per core. Both have 512 KB of L2 per core, but the EPYC’s shared L3 cache is 32 MB, four times the Ryzen’s 8 MB. The Ryzen’s integrated graphics are a key feature absent from the EPYC. The Ryzen also supports PCIe Gen 3 with 8 lanes from the CPU, while the EPYC supports PCIe Gen 3 without lane restrictions listed in the data. The production status for both is active, but the release dates are years apart: the Ryzen launched on 2021-01-11, while the EPYC launched on 2018-06-13.

Where Each One Wins

Looking strictly at the benchmark data, the AMD EPYC 7261 wins in every single test. It has higher scores in Cinebench R15, R20, and R23, both in single-core and multi-core. If the decision is based purely on those six numbers, the EPYC is the definitive winner. It also wins on core count, thread count, and L3 cache size, which are not directly benchmarked here but are relevant for workloads that scale beyond the tested scenarios.

The Ryzen 3 5400U wins in areas not captured by the Cinebench suite. It has a significantly higher boost clock (4.00 GHz versus 2.90 GHz), which helps in lightly threaded tasks. It has integrated graphics, meaning a system built around it does not require a separate GPU for display output. It also has a dramatically lower TDP of 15 W versus 170 W, making it the only viable choice for fanless or battery-powered designs. The Ryzen’s smaller process node (7 nm versus 14 nm) and higher transistor count indicate a more modern design that delivers comparable performance with far less power draw.

In practical terms, the EPYC 7261 is the pick for a server or workstation where the extra cores, ECC memory support, and eight-channel memory bandwidth are essential, and where the 170 W TDP is not a concern. The Ryzen 3 5400U is the pick for a mobile workstation or a compact desktop where the 15 W TDP and integrated GPU are critical, and where the 1.3% performance deficit in these tests is irrelevant. The benchmarks show the EPYC is faster, but the Ryzen is the more efficient and versatile part for consumer-facing systems.