CPU Comparison

The AMD Ryzen 3 5300U and the Intel Atom C5125 occupy vastly different positions in the processor landscape, yet their average benchmark scores are nearly identical. The Ryzen 3 5300U, a mobile part from the 5000 series built on Zen 2, delivers an average score of 2135 and sits at the 46th percentile of all CPUs. The Intel Atom C5125, a server/workstation chip from the Parker Ridge family using the Tremont architecture, posts an average score of 2122, also at the 46th percentile. While their overall averages differ by only 0.6%, the underlying benchmark data reveals a fundamental split: the AMD chip dominates in single-threaded and older multi-threaded tests, while the Intel chip takes a decisive victory in the newer Cinebench R23 multi-core workload.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 3 5300U has an average benchmark score of 2135, which is slightly higher than the Intel Atom C5125’s 2122. The difference is marginal, with the Ryzen chip being only 0.6% ahead based on the deltaPct values from their nearest rival lists.

Q: How do the two chips compare in Cinebench R23 multi-core performance?

A: The Intel Atom C5125 wins this test decisively, scoring 7336 compared to the AMD Ryzen 3 5300U’s 5341. This represents a 27.2% advantage for the Intel chip in this specific workload.

Q: Which processor offers better single-core performance?

A: The AMD Ryzen 3 5300U is the clear winner in single-core tests. In Cinebench R15 single-core, it scores 170 against the Atom’s 104, a 63.5% lead. In Cinebench R23 single-core, the AMD chip scores 1115 versus 1035, a 7.7% advantage.

Q: What are the core and thread counts for each processor?

A: The AMD Ryzen 3 5300U has 4 cores and 8 threads, while the Intel Atom C5125 has 8 cores and 8 threads. Despite having half the core count, the AMD chip supports simultaneous multithreading, doubling its thread count.

Q: Do both processors support the same memory type?

A: Yes, both support DDR4 memory and use a dual-channel memory bus. However, the AMD Ryzen 3 5300U has a higher theoretical memory bandwidth of 51.2 GB/s compared to the Intel Atom C5125’s 46.9 GB/s.

Q: Which processor includes integrated graphics?

A: Only the AMD Ryzen 3 5300U has integrated graphics, featuring Radeon Graphics with 384SP. The Intel Atom C5125 has no integrated graphics, listing "N/A" for that specification.

The Verdict

The data presents a clear choice based on workload characteristics. The AMD Ryzen 3 5300U is the pick for general-purpose and client-centric tasks where single-threaded responsiveness matters. It wins 3 out of 4 head-to-head benchmarks, including both single-core tests and the Cinebench R15 multi-core test. Its 63.5% lead in Cinebench R15 single-core is the largest margin in the comparison, indicating a substantial advantage in lightly-threaded applications. The 7.7% lead in Cinebench R23 single-core, while smaller, still favors the AMD chip. For users running legacy software or applications that rely on older multi-threaded benchmarks, the Ryzen 3 5300U’s 22.6% win in Cinebench R15 multi-core makes it the safer choice.

The Intel Atom C5125 is the pick for specific server or workstation workloads that scale well with many physical cores and are optimized for modern rendering engines. Its 27.2% victory in Cinebench R23 multi-core is a significant margin, suggesting that in long-running, heavily parallelized compute tasks, the Atom’s 8 physical cores provide a real throughput advantage over the Ryzen’s 4 cores with 8 threads. However, this comes with trade-offs: the Atom loses in every single-core test and in the older multi-core benchmark, and it lacks integrated graphics. The choice hinges on whether the workload is dominated by modern multi-threaded rendering or by a mix of single-threaded and legacy tasks. The data does not support a universal recommendation; it supports a workload-specific one.

Head-to-Head Benchmarks

The benchmark results show a stark split between the two processors. The AMD Ryzen 3 5300U wins the Cinebench R15 multi-core test with a score of 906, while the Intel Atom C5125 trails at 739. This 22.6% delta indicates that in this older test, the AMD chip’s architecture and thread scheduling provide a clear edge. The gap widens dramatically in the Cinebench R15 single-core test, where the Ryzen 3 5300U scores 170 and the Atom scores just 104. The 63.5% margin here is the most pronounced difference in the entire comparison, highlighting a fundamental disparity in per-core performance between the Zen 2 cores in the AMD chip and the Tremont cores in the Intel chip.

The dynamic reverses completely in the Cinebench R23 multi-core test. Here, the Intel Atom C5125 scores 7336, while the AMD Ryzen 3 5300U manages only 5341. The 27.2% advantage for the Intel chip is substantial and suggests that the R23 workload is far better at utilizing the Atom’s 8 physical cores compared to the Ryzen’s 4 cores with 8 threads. The final benchmark, Cinebench R23 single-core, returns to form for AMD, but with a much narrower margin. The Ryzen 3 5300U scores 1115, and the Atom scores 1035, giving AMD a 7.7% lead. This is a much smaller gap than in the R15 single-core test, indicating that the newer Cinebench version is less punishing on the Atom’s single-core performance. In total, the AMD chip claims 3 wins, while the Intel chip claims 1, but the magnitude of Intel’s single win is larger than any single AMD victory except for the R15 single-core blowout.

Specification Differences

The two processors differ across nearly every core specification. The AMD Ryzen 3 5300U has 4 cores and 8 threads, while the Intel Atom C5125 has 8 cores and 8 threads, meaning the AMD chip relies on simultaneous multithreading to match the thread count. The base clocks differ as well; the AMD chip runs at 2.60 GHz, and the Intel chip at 2.80 GHz. However, the AMD chip has a boost clock of 3.80 GHz, whereas the Intel Atom C5125 has no listed boost clock, indicating it runs at a fixed frequency.

The thermal design power (TDP) differs significantly, with the AMD Ryzen 3 5300U rated at 15 W and the Intel Atom C5125 at 50 W. The socket types are incompatible: the AMD chip uses AMD Socket FP6, and the Intel chip uses Intel BGA 2106. Memory support is similar in type (DDR4) and channel configuration (dual-channel), but the AMD chip has a higher memory bandwidth at 51.2 GB/s versus 46.9 GB/s for the Intel chip. A critical difference is ECC memory support: the Intel Atom C5125 supports ECC, while the AMD Ryzen 3 5300U does not. The PCIe configurations also differ, with the AMD chip offering Gen 3 with 12 lanes and the Intel chip offering Gen 3 with 16 lanes. The AMD chip includes integrated Radeon Graphics with 384SP, while the Intel chip has no integrated graphics. The market segments are distinct, with the AMD chip aimed at Mobile and the Intel chip at Server/Workstation. The release dates also differ, with the AMD chip launching on 2021-01-11 and the Intel chip on 2022-06-05. The Intel Atom C5125 has a launch MSRP of $335, while the AMD chip has no listed launch MSRP.

Architecture Differences

The architectural divide between these processors is profound. The AMD Ryzen 3 5300U is built on the Zen 2 architecture, specifically the Lucienne codename, and is manufactured by TSMC on a 7 nm process node. It contains 9,800 million transistors on a 156 mm² die. The cache layout includes 64 KB of L1 per core, 512 KB of L2 per core, and 4 MB of shared L3 cache. This design is optimized for high single-thread performance and efficient power usage, consistent with its 15 W TDP.

The Intel Atom C5125, in contrast, uses the Tremont architecture under the Parker Ridge codename, manufactured by Intel on a 10 nm process node. Its cache structure is notably different: it has 64 KB of L1 per core but 4.5 MB of L2 per module, and it has no listed L3 cache. This cache design, combined with the lack of a boost clock, reflects a focus on predictable, sustained throughput across many cores rather than peak single-core speed. The absence of transistor count and die size data for the Intel chip prevents a direct comparison of physical scale, but the architectural differences are clear. The Tremont cores are designed for efficiency in server environments, which aligns with the Atom’s ECC memory support and higher 50 W TDP. In contrast, the Zen 2 cores in the Ryzen chip prioritize higher instructions per clock, which explains the substantial single-core benchmark leads. The process node difference (7 nm versus 10 nm) and the different foundries (TSMC versus Intel) further underscore that these are fundamentally different designs targeting different workload profiles, despite their similar average scores.