CPU Comparison

AMD Opteron 6272 and Intel Atom x7425E occupy opposite ends of the hardware spectrum, yet benchmark results place them in remarkably close competition. The Opteron, a 16-core server processor from 2011, and the Atom, a 4-core mobile chip from 2023, both land at the 35th percentile among all CPUs, with average benchmark scores of 1288 and 1273 respectively. Across six Cinebench tests, the AMD part wins every single round, but the margins are consistently narrow, ranging from 1.1% to 1.6%. This pairing is less about raw dominance and more about how two very different design philosophies achieve nearly identical rendering performance.

Where Each One Wins

The AMD Opteron 6272 wins all six head-to-head benchmark comparisons, making it the clear performance leader in this matchup. Its victories are consistent across both single-core and multi-core tests, though the margins are slim enough that the Intel Atom x7425E remains competitive in every workload. The largest gap appears in Cinebench R15 single-core, where the Opteron leads by 1.6%, while the smallest edge is a 1.1% advantage in both R15 multi-core and R23 single-core.

The Intel Atom x7425E does not record a single benchmark win against the Opteron, but its scores are close enough that the practical difference in everyday use would be negligible. The Atom's real advantages lie outside raw compute performance. It carries an integrated UHD Graphics 24EU unit, whereas the Opteron has no integrated graphics at all, meaning the Atom can drive a display without a discrete GPU. The Atom also supports DDR4 and DDR5 memory, while the Opteron is limited to DDR3. These factors matter in system design even though they do not show up in Cinebench scores.

For workloads that are heavily threaded, the Opteron's 16 cores and 16 threads provide a theoretical advantage, yet the benchmark data shows only a 1.1% lead in multi-core tests. The Atom's 4 cores and 4 threads, running at a much higher boost clock of 3.40 GHz, are able to nearly match the older processor's throughput. In single-core tests, the Atom's 62 to 260 to 621 point scores trail by just 1.1% to 1.6%, indicating that its Gracemont architecture is far more efficient per clock than Bulldozer.

FAQ

Q: Which processor has more cores?

A: The AMD Opteron 6272 has 16 cores and 16 threads, while the Intel Atom x7425E has 4 cores and 4 threads.

Q: How close are their multi-core benchmark scores?

A: In Cinebench R23 multi-core, the Opteron scores 4454 versus the Atom's 4403, a difference of 1.2%. In Cinebench R20 multi-core, the Opteron leads 1870 to 1849, also a 1.1% gap.

Q: Does the Intel Atom support error-correcting memory?

A: No. The Atom x7425E does not support ECC memory, whereas the AMD Opteron 6272 does support ECC.

Q: What is the power consumption difference?

A: The Opteron has a TDP of 115 watts, while the Atom has a TDP of just 12 watts, making the Atom nearly ten times more power-efficient.

Q: Which processor has integrated graphics?

A: Only the Intel Atom x7425E, which includes UHD Graphics 24EU. The AMD Opteron 6272 has no integrated graphics.

Q: What generation of PCI Express does each support?

A: The Opteron uses PCIe Gen 2, while the Atom supports PCIe Gen 3 with 9 lanes on the CPU.

Head-to-Head Benchmarks

The most decisive result in this comparison is the Cinebench R15 single-core test, where the AMD Opteron 6272 scores 63 against the Intel Atom x7425E's 62, yielding a 1.6% advantage. This is the largest delta in any benchmark between the two. The Opteron's 3.00 GHz boost clock is lower than the Atom's 3.40 GHz, yet the older architecture still manages to edge out the newer one in this metric.

In multi-core workloads, the Opteron's advantage narrows slightly. The Cinebench R15 multi-core test shows the Opteron at 448 and the Atom at 443, a 1.1% lead. The R20 multi-core test follows the same pattern: 1870 versus 1849, again a 1.1% difference. The R23 multi-core test shows 4454 versus 4403, a 1.2% gap. These results suggest that the Opteron's 16 cores provide only a marginal benefit over the Atom's 4 cores in this rendering workload.

The single-core results in R20 and R23 mirror the multi-core pattern. In R20 single-core, the Opteron scores 263 against the Atom's 260, a 1.2% lead. In R23 single-core, the Opteron scores 628 against 621, a 1.1% lead. Across all six tests, the Opteron wins by an average of roughly 1.2%, which is well within the margin of run-to-run variation for most benchmarking software.

Specification Differences

The core count is the most obvious difference: 16 cores on the AMD versus 4 cores on the Intel. Thread counts match core counts, with 16 threads on the Opteron and 4 on the Atom. Base clock speeds are dramatically different, with the Opteron at 2.10 GHz and the Atom at 1500.00 MHz, though the Atom's boost clock of 3.40 GHz exceeds the Opteron's 3.00 GHz.

Memory support diverges sharply. The Opteron uses DDR3 with a quad-channel memory bus and a maximum bandwidth of 51.2 GB/s. The Atom supports both DDR4 and DDR5 but is limited to a single-channel bus with 38.4 GB/s bandwidth. ECC memory is available on the Opteron but not on the Atom. PCIe support also differs: the Opteron has PCIe Gen 2, while the Atom has PCIe Gen 3 with 9 CPU lanes.

The Opteron's cache hierarchy is organized per module and per die, with 768 KB of L1, 2 MB of L2 per module, and 8 MB of L3 per die. The Atom has 96 KB of L1 per core, 2 MB of shared L2, and 6 MB of shared L3. The Opteron uses a 2x 315 mm² die configuration, while the Atom's die size is not provided. The Opteron's launch MSRP was $523; the Atom's was $58.

Architecture Differences

The AMD Opteron 6272 is built on the Bulldozer architecture, codenamed Interlagos, and belongs to the Opteron 6000 series. It uses a 32 nm process from GlobalFoundries and contains 2,400 million transistors spread across two dies. The Atom x7425E is based on the Alder Lake architecture, specifically the Alder Lake-N variant with Gracemont cores, and is fabricated on Intel's 10 nm process.

The Opteron's Bulldozer design uses modules that share resources between pairs of cores, which is an older approach to core organization. The Atom's Gracemont cores are efficiency-focused, designed for low power consumption in mobile devices. The production status tells the story: the Opteron is end-of-life, released in 2011, while the Atom is active, released in 2023.

The Opteron is a server/workstation part with a 115 watt TDP, designed for socket G34. The Atom is a mobile processor with a 12 watt TDP, soldered to BGA 1264. The Opteron has no integrated graphics, while the Atom includes UHD Graphics 24EU. Neither processor has an unlocked multiplier. The Opteron's part number is OS6272WKTGGGU, and the Atom's is SRMLN.

The Verdict

The data points to a clear but narrow performance winner: the AMD Opteron 6272. It wins all six Cinebench benchmarks, with the largest margin being 1.6% in R15 single-core and the smallest being 1.1% in multiple tests. For anyone prioritizing raw rendering performance, the Opteron is the safer choice, even though it is an end-of-life server part from 2011.

The Intel Atom x7425E, despite losing every benchmark, presents a compelling alternative based on the numbers. Its scores are within 1.1% to 1.6% of the Opteron's across the board, yet it consumes only 12 watts compared to the Opteron's 115 watts. This efficiency advantage is enormous, and when combined with its integrated graphics, DDR4/DDR5 support, and active production status, the Atom is the more practical choice for modern, low-power systems.

The Opteron's strengths are its 16 cores, ECC memory support, quad-channel bandwidth, and higher peak memory throughput. The Atom's strengths are its modern architecture, much higher boost clock, tiny power envelope, and integrated graphics. In a server context where ECC and multi-channel memory are essential, the Opteron wins. In a mobile or embedded context where power efficiency and integrated graphics matter, the Atom is the logical pick. The benchmark scores are nearly identical, so the decision rests on system requirements rather than performance. Each processor wins in the environment it was designed for, but the actual compute performance is statistically indistinguishable.