CPU Comparison

The Intel Atom C5125 and the Intel Core i3-8350K present a fascinating study in architectural philosophy. On paper, they serve different markets, one a server/workstation part, the other a desktop processor, yet their benchmark data places them in a direct, head-to-head confrontation that defies expectations based on their respective lineages alone. The Atom C5125, with its 8 Tremont cores, emerges as the dominant performer in the Cinebench suite, while the i3-8350K, a 4-core Coffee Lake desktop chip, trails in every single test recorded. This data challenges the conventional wisdom that a desktop Core i3 would outclass a low-power Atom in raw compute, and the numbers demand a closer look at what each processor is actually optimized to do.

Head-to-Head Benchmarks

The benchmark results are decisively one-sided, with the Intel Atom C5125 winning all six recorded Cinebench tests. This is not a marginal victory; the deltas are consistent and substantial. In Cinebench R15, the Atom C5125 scores 739 points in multi-core versus the i3-8350K’s 593, a lead of 24.6%. The single-core test in R15 shows a similar story, with the Atom at 104 points against the i3’s 83, representing a 25.3% advantage. This pattern holds through the newer R20 and R23 versions of the benchmark, where the Atom C5125 maintains a 24.7% lead in both multi-core and single-core tests. For instance, in Cinebench R23, the Atom scores 7336 multi-core and 1035 single-core, while the i3-8350K manages 5884 and 830, respectively.

What is particularly striking is the uniformity of the performance gap. Across R15, R20, and R23, the delta hovers almost exactly at 24.6% to 25.3%. This consistency suggests the advantage is not tied to a specific workload characteristic within Cinebench, but rather reflects a fundamental throughput advantage of the Atom’s architecture in these rendering tasks. The i3-8350K’s higher 4.00 GHz base clock (versus 2.80 GHz for the Atom) is not enough to overcome the Atom’s double core count and its per-module L2 cache design. The data implies that Cinebench’s rendering engine scales effectively with the Atom’s 8 threads, and even its single-core performance, despite a lower clock, outpaces the i3. This is a significant finding, as it suggests the Tremont cores in the Atom are remarkably efficient per clock in this specific benchmark, or that the i3-8350K is severely hampered by its older 14nm process and architecture in these tests.

It is also importantly the i3-8350K has additional Geekbench scores in its record (4992 multi-core, 1564 single-core), but the head-to-head comparison does not include these tests. The data available for direct comparison is exclusively from the Cinebench suite, which forms the basis for the Atom’s 6-0 sweep. The absence of Geekbench results for the Atom in the head-to-head section means we cannot assess its performance in that particular benchmark suite, but the Cinebench data is unambiguous: the Atom C5125 is the superior performer in these tests by a wide margin.

FAQ

Q: Why does the Intel Atom C5125 beat the Intel Core i3-8350K in every Cinebench test?

A: The data shows the Atom C5125 holds a consistent 24.6% to 25.3% lead across R15, R20, and R23 in both single and multi-core tests. This likely stems from its 8 cores and 8 threads, which double the i3-8350K’s 4 cores and 4 threads, and its per-module 4.5 MB L2 cache, which provides a different data access pattern that proves efficient in these workloads.

Q: Does the i3-8350K have any benchmark advantage at all?

A: Based on the head-to-head data, no. The i3-8350K loses all six recorded Cinebench tests. While it has Geekbench scores listed in its own benchmark section, there are no comparable Geekbench scores provided for the Atom C5125, so no direct comparison can be made in that suite.

Q: How do these processors compare to their own rivals in the broader market?

A: The Atom C5125 has an average benchmark score of 2122, placing it in the 46th percentile of all CPUs. Its closest rival is the Intel Core i7-1160G7, with an average score of 2124, a negligible 0.1% difference. The i3-8350K, with an average score of 2096, also sits in the 46th percentile, and its nearest rival is the AMD Ryzen 7 1700X, which scores 2094, a 0.1% difference. Both processors are essentially neck-and-neck with their respective peers.

Q: Are these processors in the same performance class despite different market segments?

A: The average benchmark scores suggest they are close, with the Atom C5125 at 2122 and the i3-8350K at 2096. However, the head-to-head Cinebench results show the Atom is significantly faster in those specific tests. This indicates that the average score is a blend of various workloads, while the Cinebench suite specifically favors the Atom’s architecture.

Q: What is the difference in their production status?

A: The Atom C5125 is listed as "Active" in production, while the i3-8350K is marked as "End-of-life". This suggests the Atom is a current product for its server/workstation niche, whereas the i3 is a legacy desktop part that Intel has discontinued.

Q: Does the i3-8350K’s integrated graphics give it an edge?

A: The i3-8350K includes UHD Graphics 630, while the Atom C5125 has no integrated graphics (N/A). This is a functional difference, but it does not impact the Cinebench CPU benchmarks. The Atom requires a discrete GPU for any display output, whereas the i3 can operate with its integrated solution.

Where Each One Wins

Based strictly on the benchmark data, the Intel Atom C5125 wins in every measurable CPU performance category that was directly compared. Its victories in Cinebench R15, R20, and R23, for both single-core and multi-core, make it the clear choice for any workload that resembles these rendering tasks. The data suggests that the Atom’s 8 cores and 8 threads provide a significant advantage in multi-threaded rendering, but its single-core performance is also superior, which is a surprising result given the i3-8350K’s higher base clock. Therefore, for users running Cinebench or similar CPU-bound rendering applications, the Atom C5125 is the better processor.

The Intel Core i3-8350K, on the other hand, has no benchmark wins to its name in this comparison. Its only potential advantage lies outside the CPU core performance metrics. It includes UHD Graphics 630, which allows for a system to run without a discrete graphics card. This is a functional win for basic desktop use, but it is not a CPU performance win. Furthermore, the i3-8350K has a higher base clock of 4.00 GHz, but this does not translate into a performance victory in the provided data. The i3’s market segment is Desktop, while the Atom is Server/Workstation, so the i3 may be more suited for general-purpose desktop tasks, but the benchmark data does not support a CPU performance advantage in the tested workloads.

Specification Differences

The two processors differ significantly in their core specifications. The Intel Atom C5125 features 8 cores and 8 threads, while the Intel Core i3-8350K has 4 cores and 4 threads. The Atom’s base clock is 2.80 GHz, whereas the i3-8350K operates at a higher 4.00 GHz. This clock difference is notable, yet the benchmark results show the lower-clocked Atom outperforming the i3, indicating that core count and cache architecture are more impactful in these tests.

Their thermal design power (TDP) also diverges sharply, with the Atom rated at 50 watts and the i3 at 91 watts. This means the Atom achieves its performance with significantly lower power consumption. The sockets are incompatible: the Atom uses Intel BGA 2106, which is a soldered, non-upgradeable socket, while the i3 uses Intel Socket 1151, a standard LGA socket for desktop motherboards. The process nodes also differ, with the Atom built on a 10 nm process and the i3 on a 14 nm process, which partially explains the Atom’s efficiency. The Atom has a launch MSRP of $335, while the i3-8350K had a launch MSRP of $168. Additionally, the i3-8350K has an unlocked multiplier, allowing for overclocking, while the Atom’s multiplier is locked.

Architecture Differences

The architectural divide between these two is profound. The Intel Atom C5125 is based on the "Parker Ridge" codename, part of the Atom (Tremont) generation. This is a 10 nm design aimed at the server/workstation market, with a focus on efficiency and density. Its cache hierarchy is unique: it has 64 KB of L1 cache per core and a large 4.5 MB L2 cache per module, with no L3 cache listed. This per-module L2 design is a departure from typical desktop architectures and likely contributes to its strong multi-threaded performance in Cinebench.

In contrast, the Intel Core i3-8350K is a Coffee Lake desktop processor, built on a 14 nm process with a die size of 126 mm². It has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and a shared 8 MB L3 cache. This is a traditional desktop architecture with a large shared L3 pool, which is typically beneficial for gaming and general productivity. The i3 also integrates UHD Graphics 630, a feature completely absent from the Atom. The Atom’s memory bandwidth is higher at 46.9 GB/s, compared to the i3’s 38.4 GB/s, despite both supporting dual-channel DDR4. Both processors support ECC memory and use PCIe Gen 3 with 16 lanes from the CPU.

The Verdict

The data is clear: for pure CPU compute as measured by Cinebench, the Intel Atom C5125 is the superior processor. It wins all six head-to-head tests with a consistent margin of roughly 25%, and it does so while consuming 41 watts less power (50W vs 91W) and using a more advanced 10 nm process. Anyone selecting a CPU for rendering workloads that scale with Cinebench’s pattern should choose the Atom C5125, as its 8 cores and 8 threads provide a decisive advantage.

The Intel Core i3-8350K, however, is not without its merits. It is an end-of-life desktop part with a much lower launch MSRP of $168, and it includes integrated graphics, which the Atom lacks. Its unlocked multiplier allows for overclocking, and its 8 MB of shared L3 cache could be beneficial in other, unmeasured workloads. For a user building a budget desktop system who needs integrated graphics and does not prioritize Cinebench-style rendering, the i3-8350K could be a viable option. However, based on the benchmark data provided, the Atom C5125 is the outright winner in CPU performance, making it the logical choice for servers or workstations where this specific compute capability is paramount. The i3’s only path to victory is in scenarios that fall outside the scope of the Cinebench data, such as overclocking headroom or the necessity of an iGPU.