CPU Comparison

# Intel Core i7-5950HQ vs Intel Atom C5125

The Intel Core i7-5950HQ and Intel Atom C5125 are both Intel processors, but they target entirely different market segments. The i7-5950HQ is a mobile Broadwell-H part from 2015, while the Atom C5125 is a server/workstation chip from Parker Ridge. Benchmark results show the Atom C5125 winning all six head-to-head tests, but the margin is consistent rather than overwhelming. The Atom leads by roughly 11% across every Cinebench workload, with single-core and multi-core deltas nearly identical. This suggests the Atom's architectural advantage is uniform rather than workload-specific, which is unusual for two chips with such different designs.

Head-to-Head Benchmarks

The Atom C5125 sweeps every benchmark in the comparison, but the margins tell a more nuanced story than a simple win count. In Cinebench R15 multi-core, the Atom scores 739 against the i7-5950HQ's 656, a delta of -11.2% from the i7's perspective. That is a decisive but not massive gap. The single-core R15 test shows the same pattern: Atom at 104, i7 at 92, again an 11.5% difference. These are not the kind of blowout margins you might expect from a newer 10 nm part against a 14 nm chip from 2015.

Moving to Cinebench R20, the Atom extends its lead slightly. Multi-core scores are 3081 for the Atom versus 2736 for the i7, an 11.2% delta. Single-core R20 sees the Atom at 434 and the i7 at 386, an 11.1% gap. The consistency across R15 and R20 is striking, the relative performance difference barely moves between test generations, which indicates the two chips scale similarly with workload intensity.

Cinebench R23 continues the trend. The Atom posts 7336 multi-core and 1035 single-core, while the i7 manages 6516 and 920 respectively. The deltas are -11.2% and -11.1%, essentially identical to the R15 and R20 results. This uniformity suggests the performance gap is a fixed architectural property, not something that varies with thermal headroom or boost behavior. The i7 does have a higher boost clock at 3.80 GHz versus the Atom's fixed 2.80 GHz, yet the Atom still wins every test, so the Atom's per-clock efficiency advantage more than compensates for its lower frequency.

Looking at the broader benchmark landscape, the i7-5950HQ has an average benchmark score of 2158, placing it in the 47th percentile of all CPUs. Its nearest rivals include the Intel Core i5-10200H (avg 2154, +0.2% delta) and the AMD Ryzen 3 3300X (avg 2148, +0.5% delta). The Atom C5125, meanwhile, averages 2122 and sits in the 46th percentile, with nearest rivals like the Intel Core i7-1160G7 (avg 2124, -0.1%) and Intel Xeon E-2224G (avg 2117, +0.2%). Despite the Atom winning all direct comparisons, the two chips are nearly tied in overall percentile ranking, the i7 is one percentile point higher. This happens because the i7 has Geekbench scores in its dataset (4601 multi-core, 1353 single-core) that the Atom lacks, and those results pull its average up.

The Verdict

The data points to a clear winner in raw compute: the Intel Atom C5125 beats the i7-5950HQ in every benchmark tested, with margins between 11.1% and 11.5%. If your priority is pure processing throughput in Cinebench-style workloads, the Atom is the better choice. It achieves this with 8 cores and 8 threads at a 2.80 GHz base clock, no boost, and a 50 W TDP. The i7-5950HQ has only 4 cores and 8 threads, but it boosts to 3.80 GHz and runs at a lower 47 W TDP.

However, the i7-5950HQ is not without its own advantages. It comes with Iris Pro Graphics 6200 integrated graphics, while the Atom has no integrated GPU at all. The i7 also supports DDR3 memory, whereas the Atom requires DDR4. If you need a CPU with built-in display output, the i7 is the only option here. The i7 also has a higher single-core boost clock, which could matter in lightly threaded tasks that rely on frequency rather than core count.

For a mobile or compact system where integrated graphics are essential, the i7-5950HQ is the practical pick. For a server or workstation where ECC memory support matters and you have a discrete GPU, the Atom C5125 is the stronger performer. The Atom's 46.9 GB/s memory bandwidth exceeds the i7's 29.9 GB/s, and it supports ECC RAM while the i7 does not. The Atom is also an active production part, while the i7 is end-of-life. The launch MSRP of the Atom is $335, while the i7 launched at $623.

FAQ

Q: Which CPU wins in multi-core performance?

A: The Intel Atom C5125 wins all three multi-core tests. It scores 739 in Cinebench R15, 3081 in R20, and 7336 in R23, versus the i7-5950HQ's 656, 2736, and 6516. The delta is approximately -11.2% in each case.

Q: Is the single-core performance gap the same as multi-core?

A: Yes, nearly identical. The Atom leads by 11.5% in R15 single-core (104 vs 92), 11.1% in R20 (434 vs 386), and 11.1% in R23 (1035 vs 920). The margin is consistent across both single and multi-threaded workloads.

Q: Does the i7-5950HQ have any benchmark advantage?

A: Yes, in Geekbench. The i7 scores 4601 multi-core and 1353 single-core, while the Atom has no Geekbench results in the dataset. This gives the i7 a higher average benchmark score of 2158 versus the Atom's 2122, and a 47th percentile ranking versus the Atom's 46th.

Q: Which CPU supports ECC memory?

A: Only the Intel Atom C5125 supports ECC memory. The i7-5950HQ does not. The Atom also uses DDR4 memory with dual-channel support and 46.9 GB/s bandwidth, while the i7 uses DDR3 with 29.9 GB/s bandwidth.

Q: Can either CPU run without a discrete graphics card?

A: Only the i7-5950HQ can, as it includes Iris Pro Graphics 6200. The Atom C5125 has no integrated graphics (listed as "N/A"), so it requires a separate GPU for display output.

Q: How do these chips compare to their nearest rivals overall?

A: The i7-5950HQ's nearest rival is the Intel Core i5-10200H (avg score 2154, +0.2% delta), while the Atom C5125's nearest rival is the Intel Core i7-1160G7 (avg score 2124, -0.1% delta). Both chips sit within 0.7% of their closest competitors.

Specification Differences

The two processors differ in nearly every fundamental specification. The i7-5950HQ has 4 cores and 8 threads, while the Atom C5125 has 8 cores and 8 threads. Base clocks are close, 2.90 GHz for the i7 versus 2.80 GHz for the Atom, but the i7 adds a 3.80 GHz boost clock, while the Atom has no boost capability. TDP is 47 W for the i7 and 50 W for the Atom.

Sockets differ completely: the i7 uses Intel BGA 1364, while the Atom uses Intel BGA 2106. Process nodes are different generations, with the i7 on 14 nm and the Atom on 10 nm. Cache layouts are not comparable: the i7 has 64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3, while the Atom has 64 KB L1 per core and 4.5 MB L2 per module, with no L3 listed.

Memory support is split by generation. The i7 uses DDR3 with dual-channel support and 29.9 GB/s bandwidth, while the Atom uses DDR4 with dual-channel support and 46.9 GB/s bandwidth. ECC memory is available only on the Atom. Both have PCIe Gen 3 with 16 lanes (CPU only), but the i7 has integrated Iris Pro Graphics 6200 while the Atom has none.

The i7 is a mobile part, end-of-life, released in 2015, while the Atom is an active server/workstation part released in 2022. The i7's launch MSRP was $623, and the Atom's was $335. Neither has an unlocked multiplier.

Architecture Differences

The architectural gap here is generational. The i7-5950HQ uses Broadwell-H architecture on a 14 nm process, while the Atom C5125 uses Parker Ridge with Tremont cores on a 10 nm process. The smaller process node gives the Atom a density and efficiency advantage, but the core designs themselves are fundamentally different.

Broadwell is a high-performance Core architecture designed for mobile devices, emphasizing single-thread speed and integrated graphics capability. Tremont, by contrast, is a low-power Atom core designed for efficiency in server and edge workloads. The Atom makes up for its simpler cores by doubling the core count, 8 cores versus 4, and relying on higher memory bandwidth (46.9 GB/s vs 29.9 GB/s) to feed them.

The i7's 6 MB shared L3 cache is a traditional Intel design for Core processors, while the Atom's 4.5 MB L2 per module reflects a different cache hierarchy optimized for many-core server workloads. The i7's die size is 182 mm², but the Atom's die size is not listed. The i7 also has a higher boost clock, but the Atom's per-clock efficiency is enough to overcome that frequency deficit in every benchmark.

Where Each One Wins

The Intel Atom C5125 wins in all six direct benchmark comparisons. It is faster in Cinebench R15, R20, and R23, both single-core and multi-core. This makes it the better choice for rendering, video encoding, and any heavily threaded compute task that runs on the CPU. It also wins on memory bandwidth (46.9 GB/s vs 29.9 GB/s), supports ECC memory for error-sensitive workloads, and is a current production part. The Atom's active status means it remains available for new server builds, and its 8 cores at 2.80 GHz provide a solid foundation for virtualization or container workloads.

The i7-5950HQ wins where the Atom simply cannot compete. It has integrated Iris Pro Graphics 6200, so it can drive a display without a discrete GPU, the Atom has no graphics at all. It also has Geekbench scores that the Atom lacks, giving it a higher average benchmark score (2158 vs 2122) and a higher percentile ranking (47th vs 46th). The i7's lower TDP (47 W vs 50 W) is a small but real efficiency edge, and its 3.80 GHz boost clock can help in bursty single-threaded tasks where frequency matters more than core count. If you are building a compact mobile workstation or a system where integrated graphics and legacy DDR3 support are requirements, the i7 is the only viable option. If you are building a server, need ECC, and have a GPU, the Atom is the faster processor in every measured workload.