AMD Phenom II X6 1035T vs Intel Atom C5315 Comparison

Head-to-Head Benchmarks

The benchmark data presents a remarkably consistent picture: the AMD Phenom II X6 1035T wins all five head-to-head Cinebench comparisons, though by extremely narrow margins. The largest gap appears in Cinebench R20 single-core, where the AMD part scores 151 against the Intel Atom C5315's 149, a delta of -1.3%. That 1.3% difference is the widest spread in the entire dataset, and it translates to just two raw points. In Cinebench R23 single-core, the Phenom again leads, 361 to 357, a 1.1% margin. These single-threaded results are notable because the Atom C5315 is built on a much newer 10 nm process, yet it cannot overcome the Phenom's 2.60 GHz base clock versus the Atom's 2.40 GHz, nor its 3.10 GHz boost clock, which the Atom lacks entirely.

Multi-core results follow the same pattern. In Cinebench R15, the Phenom scores 258 versus the Atom's 255, a 1.2% advantage. Cinebench R20 multi-core shows 1075 against 1063, a 1.1% edge. Cinebench R23 multi-core repeats the story: 2561 for the AMD chip, 2533 for the Intel chip, again a 1.1% gap. The consistency across all five workloads is striking—every delta falls between 1.1% and 1.3%. This suggests the performance difference is systemic rather than workload-specific. The Phenom's six cores and six threads provide a structural advantage over the Atom's four cores and four threads, but the Atom's newer architecture and higher memory bandwidth (38.4 GB/s versus 21.3 GB/s) appear to compensate almost entirely.

The average benchmark scores reinforce this near-parity. The Atom C5315 averages 871 points across all tests, while the Phenom II X6 1035T averages 881 points, a 1.1% difference. Both processors sit at the 23rd percentile among all CPUs in the database. The nearest rivals for the Atom include the AMD Athlon PRO 3045B at 872 points (a -0.1% delta) and the Intel Core i3-5157U at 877 points (-0.7%). The Phenom's nearest rivals include the Intel Core i3-1000NG4 at 881 points (0% delta) and the Intel Core i7-930 at 882 points (-0.1%). In practical terms, these two processors are indistinguishable in raw compute performance; the data shows a statistical tie rather than a decisive victory for either side.

Architecture Differences

The two processors come from vastly different eras and design philosophies. The Intel Atom C5315 is part of the Parker Ridge generation, built on the Tremont microarchitecture at a 10 nm process node. It is an active, production-status server and workstation part, released in June 2022. The AMD Phenom II X6 1035T, by contrast, is a K10 architecture chip codenamed Thuban, manufactured on a 45 nm process at GlobalFoundries. It is end-of-life, having been released in April 2010. The process node difference alone—10 nm versus 45 nm—represents multiple generations of manufacturing advancement.

Core and thread counts differ meaningfully. The Atom provides 4 cores and 4 threads, with no simultaneous multithreading. The Phenom offers 6 cores and 6 threads, also without SMT. The Phenom's two additional cores give it a theoretical parallel advantage, yet the benchmark results show that advantage is nearly neutralized. Cache hierarchies also diverge sharply. The Atom has 64 KB of L1 cache per core and 4.5 MB of L2 per module, with no L3 cache. The Phenom has 128 KB of L1 per core, 512 KB of L2 per core, and a shared 6 MB L3 cache. The Phenom's L3 cache is particularly significant for multi-threaded workloads, as it reduces inter-core communication latency.

Memory support and bandwidth present a major differentiator. The Atom supports DDR4 memory on a dual-channel bus with a peak bandwidth of 38.4 GB/s. The Phenom supports both DDR2 and DDR3, also dual-channel, but with a peak bandwidth of only 21.3 GB/s. The Atom's memory bandwidth is roughly 80% higher, which explains how a 4-core chip can nearly match a 6-core chip in memory-sensitive Cinebench workloads. Both processors support ECC memory, which is unusual for the desktop-oriented Phenom but expected for the server-focused Atom.

PCIe capabilities differ as well. The Atom provides PCIe Gen 3 with 8 lanes (CPU only), while the Phenom offers PCIe Gen 2. The Atom's newer PCIe generation offers higher per-lane bandwidth, though the Phenom's platform may support more total lanes depending on the motherboard. The Atom has no integrated graphics, while the Phenom's graphics capability is listed as "on certain motherboards (Chipset feature)," meaning it relies on the motherboard chipset rather than the CPU die. The Atom uses an Intel BGA 2106 socket, while the Phenom uses the AMD Socket AM3, indicating completely different platform requirements.

Power consumption is another key architectural divergence. The Atom has a 38 W TDP, while the Phenom is rated at 95 W. This 57 W difference makes the Atom dramatically more power-efficient per unit of performance. The Phenom also has a higher transistor count at 904 million and a larger die size at 346 mm², reflecting its older, less dense manufacturing process. The Atom's transistor count and die size are not listed in the data, but the 10 nm node implies significantly higher density. The Phenom's base clock is 2.60 GHz with a 3.10 GHz boost, while the Atom runs at a fixed 2.40 GHz with no boost capability. Despite the clock disadvantage, the Atom's architectural efficiency keeps it competitive.

FAQ

Q: Which processor is faster in multi-core Cinebench R23?

A: The AMD Phenom II X6 1035T scores 2561 in Cinebench R23 multi-core, while the Intel Atom C5315 scores 2533. The Phenom leads by 1.1%, a margin of 28 points.

Q: Does the Intel Atom C5315 have a boost clock?

A: No. The Atom C5315 has a fixed base clock of 2.40 GHz with no boost clock listed. The Phenom II X6 1035T has a 2.60 GHz base clock and a 3.10 GHz boost clock.

Q: What is the memory bandwidth difference between these two CPUs?

A: The Atom C5315 supports DDR4 with a peak memory bandwidth of 38.4 GB/s. The Phenom II X6 1035T supports DDR2 and DDR3 with a peak bandwidth of 21.3 GB/s. The Atom's bandwidth is approximately 80% higher.

Q: How do these processors compare in average benchmark score?

A: The Atom C5315 has an average benchmark score of 871, while the Phenom II X6 1035T averages 881. The Phenom leads by 1.1%, and both sit at the 23rd percentile among all CPUs.

Q: Which processor has more cores and threads?

A: The Phenom II X6 1035T has 6 cores and 6 threads. The Atom C5315 has 4 cores and 4 threads. Neither processor supports simultaneous multithreading.

Q: What are the production statuses of these two chips?

A: The Intel Atom C5315 is listed as active and in production. The AMD Phenom II X6 1035T is end-of-life. The Atom was released in June 2022, while the Phenom was released in April 2010.

The Verdict

The data presents a clear but nuanced picture. The AMD Phenom II X6 1035T wins every single head-to-head benchmark, from Cinebench R15 multi-core (258 versus 255) to Cinebench R23 single-core (361 versus 357). It also holds a higher average benchmark score (881 versus 871) and a better percentile ranking (23rd for both, but the Phenom's nearest rivals cluster slightly higher). If the sole criterion is raw Cinebench performance, the Phenom is the correct choice.

However, the margins are so small—all under 1.3%—that the decision should rest on other factors. The Intel Atom C5315 offers vastly superior power efficiency with a 38 W TDP versus the Phenom's 95 W. It provides nearly double the memory bandwidth (38.4 GB/s versus 21.3 GB/s) and supports newer DDR4 memory. It is also an active product, whereas the Phenom is end-of-life. For server and workstation deployments where power density and memory throughput matter, the Atom is the rational pick despite losing every benchmark. The Phenom's six cores and 6 MB of shared L3 cache make it attractive for legacy desktop builds or applications that scale with core count, but its age and power draw are significant liabilities.

The benchmark data shows no scenario where one processor is dramatically superior. A 1.1% to 1.3% delta across all workloads is within run-to-run variance for many systems. The verdict is straightforward: choose the Phenom II X6 1035T if maximum Cinebench score is the only metric that matters. Choose the Atom C5315 for its modern platform, lower power envelope, higher memory bandwidth, and active production status. The data does not support a decisive performance winner; it supports a trade-off between efficiency and legacy core count.

Specification Differences

| Specification | Intel Atom C5315 | AMD Phenom II X6 1035T |

|---|---|---|

| Cores | 4 | 6 |

| Threads | 4 | 6 |

| Base Clock | 2.40 GHz | 2.60 GHz |

| Boost Clock | None | 3.10 GHz |

| TDP | 38 W | 95 W |

| Socket | Intel BGA 2106 | AMD Socket AM3 |

| Architecture | (Tremont) | K10 |

| Codename | Parker Ridge | Thuban |

| Process Node | 10 nm | 45 nm |

| Foundry | Intel | GlobalFoundries |

| Transistors | Not listed | 904 million |

| Die Size | Not listed | 346 mm² |

| L1 Cache | 64 KB (per core) | 128 KB (per core) |

| L2 Cache | 4.5 MB (per module) | 512 KB (per core) |

| L3 Cache | None | 6 MB (shared) |

| Memory Support | DDR4 | DDR2, DDR3 |

| Memory Bandwidth | 38.4 GB/s | 21.3 GB/s |

| PCIe | Gen 3, 8 Lanes (CPU only) | Gen 2 |

| Integrated Graphics | N/A | On certain motherboards (Chipset feature) |

| Market Segment | Server/Workstation | Desktop |

| Production Status | Active | End-of-life |

| Release Date | June 2022 | April 2010 |

| Launch MSRP | $213 | Not listed |

| Multiplier Unlocked | No | No |

| Part Number | SRL3Y | HDT35TWFK6DGRHDT35TWFGRBOX |