AMD Athlon PRO 300U vs Intel Xeon D-1520 Comparison

Head-to-Head Benchmarks

The recorded benchmark data shows a clear and consistent pattern across all five Cinebench tests: the Intel Xeon D-1520 wins every single head-to-head matchup against the AMD Athlon PRO 300U. The margin is remarkably uniform, hovering around 20% in each workload. This consistency suggests the performance gap is structural rather than workload-specific, driven by fundamental differences in the two processors' designs.

Starting with the multi-core tests, the Xeon D-1520 scores 421 in Cinebench R15 multi-core, while the Athlon PRO 300U manages 349. That is a 20.6% advantage for Intel. Moving to Cinebench R20 multi-core, the Xeon scores 1755 versus 1456 for AMD, a 20.5% gap. In the newer Cinebench R23 multi-core test, the Xeon posts 4179 against 3468, again a 20.5% lead. The consistency across three different Cinebench versions is striking. It suggests that the Xeon's advantage in multi-threaded rendering scales linearly with whatever workload is thrown at it.

The single-core results tell the same story. In Cinebench R20 single-core, the Xeon scores 247, while the Athlon scores 205, a 20.5% difference. In Cinebench R23 single-core, the Xeon posts 590 versus 489, which is a 20.7% lead. The fact that the gap is nearly identical in both single-core and multi-core tests is telling. It means the AMD chip is not compensating in lightly threaded work, nor is the Intel chip leaning on its extra cores to pull ahead. The Xeon simply has a faster core design for this particular benchmark suite.

The aggregate average benchmark score across all recorded tests reinforces the picture. The Xeon D-1520 averages 1209 points, while the Athlon PRO 300U averages 1193. That difference is only about 1.3%, but the average is pulled down by the fact that the two processors have different benchmark sets, and the AMD chip has no R15 single-core result recorded. Looking at the head-to-head tests exclusively, the margin is a consistent 20.5% to 20.7% in every matchup.

In terms of percentile ranking among all CPUs in the database, the Xeon sits at the 34th percentile, while the Athlon sits at the 33rd. These are essentially equivalent positions, meaning both chips are in the lower-middle range of overall performance. However, within this specific comparison, the Xeon is the clear victor in raw compute speed. The win count is 5 for Intel and 0 for AMD in the head-to-head records, with no test going the other way.

The uniformity of the 20.5% delta across every test is notable. It is not a case where the Xeon wins big on multi-core and modestly on single-core. It wins by the same margin everywhere. That consistency makes the architectural comparison straightforward: the Intel chip is simply more efficient at executing Cinebench's rendering task per clock, and it has more cores to do it with.

Architecture Differences

The two processors come from completely different design philosophies and target different market segments. The Intel Xeon D-1520 is a server and workstation oriented chip built on the Broadwell architecture, specifically the Broadwell-DE generation. It uses a 14 nm process manufactured by Intel itself. The chip integrates 3,200 million transistors on a die size of 246 mm². It has 4 cores and 8 threads, with a base clock of 2.20 GHz and a boost clock of 2.60 GHz.

The AMD Athlon PRO 300U, on the other hand, is a mobile processor built on the Zen architecture, codenamed Raven Ridge 2. It also uses a 14 nm process, but the foundry is GlobalFoundries rather than Intel. The Athlon has only 2 cores and 4 threads, with a higher base clock of 2.40 GHz and a boost clock of 3.30 GHz. The higher clocks do not compensate for the fewer cores, as the benchmark data shows.

Cache allocations differ substantially. The Xeon uses a per-core cache hierarchy: 64 KB of L1 per core, 256 KB of L2 per core, and 1.5 MB of L3 per core. In contrast, the Athlon has 128 KB of L1 per core, 512 KB of L2 per core, and a shared 4 MB L3 pool. The AMD chip has larger per-core L1 and L2, plus a shared pool, but the Xeon has more total L3 when considering all four cores (6 MB versus 4 MB shared).

Memory support is another split. The Xeon supports both DDR3 and DDR4, while the Athlon only supports DDR4. Both are dual-channel. The Xeon also supports ECC memory, making it suitable for server and workstation environments. The Athlon does not support ECC at all. That is a critical differentiator for anyone building a system where data integrity matters more than raw speed.

The integrated graphics situation is one of the biggest differences. The Xeon D-1520 has no integrated graphics at all, which is standard for a server-focused chip. The Athlon PRO 300U includes Radeon Vega 3 integrated graphics. This makes the AMD chip a complete system-on-chip for a laptop or small form factor, while the Intel chip requires a discrete GPU.

The Xeon also has PCIe Gen 3 with 24 lanes from the CPU, while the Athlon's PCIe configuration is not listed in the database. The TDP numbers are starkly different: the Xeon draws 45 watts, while the Athlon draws only 15 watts. This is the primary trade-off. The Xeon uses three times the power budget to deliver around 20% more performance in the tested workloads.

The release dates are separated by about four years. The Xeon was released in March 2015, while the Athlon was released in April 2019. Both are still marked as actively in production. The Xeon has a launch MSRP of $199, though that is the only price information available for either chip. The Athlon has no launch MSRP recorded in the database.

The market segments are explicit: the Xeon is for server and workstation use, while the Athlon is for mobile. That explains the TDP gap and the presence or absence of integrated graphics. The Xeon is meant to sit in a rack or a workstation chassis with dedicated cooling and a discrete GPU. The Athlon is meant for a thin laptop with limited cooling and a small battery.

The Verdict

The data points to a simple conclusion: the Intel Xeon D-1520 is the faster processor in every benchmark recorded. It wins all five head-to-head tests with a margin of about 20.5%, whether the workload is single-core or multi-core. That margin is consistent and reproducible across three different Cinebench versions.

The Intel chip is the clear choice for anyone running multi-threaded, CPU-bound workloads such as software compilation, video rendering, or scientific computation. The 20.5% advantage in Cinebench R23 multi-core (4179 versus 3468) translates to real time savings in rendering tasks. The Xeon also has the advantage of ECC memory support, which is a requirement for many server and workstation applications where data corruption is unacceptable.

The Athlon PRO 300U, however, is not without its merits. The database shows a 15 watt TDP versus 45 watts for the Xeon. That is a threefold difference in the power budget. For mobile or small form factor systems, that is a decisive factor. The Athlon also includes Radeon Vega 3 integrated graphics, eliminating the need for a separate GPU in a basic system. For a lightweight laptop or a low-power mini PC, the Athlon is the more practical choice.

The benchmark scores are close enough in the overall rankings, with the 34th and 33rd percentiles, that neither chip is a performance header. But within this comparison, the Xeon is the faster part. The Athlon is the more efficient and the more complete package for a mobile system.

The recommendation is straightforward: if the system will be plugged into a wall and needs maximum compute throughput, pick the Xeon D-1520. If the system is portable, battery-powered, or requires integrated graphics, pick the Athlon PRO 300U. The Xeon's 20.5% performance lead does not justify its 45 watt power draw in a battery-powered device, and the Athlon's 15 watt draw does not make up for its lower performance in a server chassis. The intended use case should be the deciding factor.

Specification Differences

| Specification | Intel Xeon D-1520 | AMD Athlon PRO 300U |

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

| Cores | 4 | 2 |

| Threads | 8 | 4 |

| Base Clock | 2.20 GHz | 2.40 GHz |

| Boost Clock | 2.60 GHz | 3.30 GHz |

| TDP | 45 W | 15 W |

| Socket | Intel BGA 1667 | AMD Socket FP5 |

| Architecture | Broadwell | Zen (Raven Ridge 2) |

| Process Node | 14 nm | 14 nm |

| Foundry | Intel | GlobalFoundries |

| Transistors | 3,200 million | Not recorded |

| Die Size | 246 mm² | Not recorded |

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

| L2 Cache | 256 KB (per core) | 512 KB (per core) |

| L3 Cache | 1.5 MB (per core) | 4 MB (shared) |

| Memory Support | DDR3, DDR4 | DDR4 |

| ECC Memory | Yes | No |

| Integrated Graphics | None | Radeon Vega 3 |

| PCIe | Gen 3, 24 Lanes | Not recorded |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2015-03-08 | 2019-04-07 |

| Launch MSRP | $199 | None recorded |

The two chips differ in almost every specification category except the 14 nm process node. The core and thread count difference is the most obvious, with the Xeon having twice as many of each. The AMD chip has higher clock speeds, but the core deficit is too large to overcome. The cache layout is different, with AMD using a shared pool and Intel using per-core allocation. The graphics, ECC support, socket, and TDP are all fundamentally different.

FAQ

Q: Which processor is faster in all head-to-head benchmarks?

A: The Intel Xeon D-1520 wins all five recorded Cinebench head-to-head tests, with a consistent 20.5% to 20.7% advantage over the AMD Athlon PRO 300U in every test.

Q: What is the single biggest performance difference between the two?

A: The Intel Xeon D-1520 scores 4179 in Cinebench R23 multi-core versus 3468 for the AMD Athlon PRO 300U, a 20.5% difference. The Xeon wins by the same margin in single-core tests.

Q: Does the AMD Athlon PRO 300U have any advantages over the Intel Xeon D-1520?

A: Yes, the Athlon has a 15 watt TDP versus 45 watts for the Xeon, making it far more power efficient. It also includes integrated Radeon Vega 3 graphics, while the Xeon has no integrated graphics. The Athlon also has a higher base clock (2.40 GHz) and boost clock (3.30 GHz) than the Xeon (2.20 GHz and 2.60 GHz).

Q: Which processor supports ECC memory?

A: The Intel Xeon D-1520 supports ECC memory, while the AMD Athlon PRO 300U does not. This makes the Xeon more suitable for server and workstation work where error-correcting memory is required.

Q: What is the average benchmark score for each processor?

A: The Intel Xeon D-1520 has an average benchmark score of 1209 points across all recorded tests, while the AMD Athlon PRO 300U has an average of 1193 points. The Xeon ranks at the 34th percentile among all CPUs, and the Athlon ranks at the 33rd percentile.

Q: Are both processors on the same manufacturing process?

A: Yes, both use a 14 nm process. The Intel Xeon D-1520 is manufactured by Intel (Broadwell architecture), and the AMD Athlon PRO 300U is manufactured by GlobalFoundries (Zen, Raven Ridge 2 architecture). The Intel chip has 3,200 million transistors on a 246 mm² die, while the AMD chip's transistor count and die size are not recorded.