AMD Athlon PRO 3045B vs Intel Xeon X5492 Comparison

Head-to-Head Benchmarks

The recorded benchmark data shows a consistent, though narrow, advantage for the Intel Xeon X5492 across every tested workload. The AMD Athlon PRO 3045B does not secure a single win in the head-to-head comparison, while the Intel part takes all five measured tests.

In Cinebench R15 multicore, the Intel Xeon X5492 scores 249 against the AMD Athlon PRO 3045B's 237, a delta of -4.8% in favor of Intel. The gap remains nearly identical in Cinebench R20 multicore, where Intel posts 1039 versus AMD's 988, again a -4.9% difference. The R20 single-core test follows the same pattern: Intel at 146, AMD at 139, with the same -4.8% margin. Cinebench R23 multicore shows Intel at 2475 and AMD at 2354, a -4.9% delta, and the R23 single-core test closes the set with Intel at 349 versus AMD at 332, also -4.9%.

The pattern is striking for its uniformity. Every delta sits between -4.8% and -4.9%, which indicates that the performance gap is not workload-dependent but rather a consistent structural difference. The AMD part's Geekbench results, which are not part of the head-to-head set, show a multicore score of 1287 and a single-core score of 766. These numbers cannot be directly compared to the Intel part because no equivalent Geekbench entry exists for the Xeon X5492 in the database, but they place the Athlon in the 23rd percentile of all CPUs.

The average benchmark score for the AMD Athlon PRO 3045B is 872, while the Intel Xeon X5492 averages 852. This is an interesting inversion: the Intel part wins every direct comparison, yet its average across all recorded benchmarks is lower. The explanation lies in the benchmark sets. The AMD part has seven recorded benchmarks, including Geekbench tests where it likely performs relatively better, while the Intel part has only five, all Cinebench variants. The averages are not directly comparable due to differing test suites.

The nearest rivals for each processor reinforce their respective performance tiers. The AMD Athlon PRO 3045B sits within 0.6% of the Intel Core i7-3540M (867), within 0.1% of the Intel Atom C5315 (871), and 0.5% below the Intel Core i3-5157U (877). The Intel Xeon X5492 is within 0.4% of the AMD Athlon X4 830 (848), 0.5% below the Intel Core i5-2500T (856), 0.4% below the Intel Core i5-5250U (856), and 0.8% below the Intel Core i7-4500U (859). Both processors occupy the same percentile rank at 23, meaning they sit in the lower quartile of all CPUs in the database.

Architecture Differences

The two processors come from different eras and design philosophies. The AMD Athlon PRO 3045B is built on the Zen architecture, codenamed Dali, using a 14 nm process from GlobalFoundries. It packs 3,500 million transistors on a 148 mm² die. The Intel Xeon X5492 uses the Core 2 architecture, codenamed Harpertown, on a 45 nm process from Intel, with 820 million transistors spread across a dual-die design totaling 2x 107 mm².

Core counts differ significantly. The AMD part offers 2 cores and 4 threads, while the Intel part provides 4 cores and 4 threads. The Intel Xeon has twice the physical core count but no hyper-threading, so thread counts are identical at 4. The AMD Athlon relies on simultaneous multithreading to reach its 4 threads from 2 physical cores.

Clock speeds favor Intel. The Xeon X5492 runs at a base clock of 3.40 GHz with no boost clock listed, while the Athlon PRO 3045B has a base of 2.30 GHz and boosts to 3.20 GHz. The Intel part's higher base clock partially explains its consistent lead in single-threaded tests, where it scores 146 versus 139 in Cinebench R20 and 349 versus 332 in R23.

Cache hierarchies are markedly different. The AMD processor has 96 KB of L1 per core, 512 KB of L2 per core, and 4 MB of shared L3 cache. The Intel processor has 64 KB of L1 per core and 6 MB of L2 per die, with no L3 cache listed. The Intel design uses a larger L2 but no L3, while AMD employs a smaller L2 with a shared L3. The 4 MB shared L3 on the AMD part may help in workloads that benefit from a common cache pool, though the benchmark data does not isolate this effect.

Memory support diverges sharply. The AMD Athlon PRO 3045B supports DDR4 in a dual-channel configuration with a memory bandwidth of 38.4 GB/s. The Intel Xeon X5492 supports both DDR2 and DDR3 in dual-channel, but no bandwidth figure is recorded in the database. Both support ECC memory. The AMD part's modern DDR4 interface provides substantially higher theoretical bandwidth, though the benchmark results do not show a corresponding performance advantage in the tested Cinebench workloads.

Power and thermal envelopes are a major differentiator. The AMD processor has a TDP of 15 watts, while the Intel Xeon X5492 draws 150 watts, a tenfold difference. The AMD part is classified as a mobile processor on AMD Socket FP5, while the Intel part is a server/workstation chip on Intel Socket 771. The production status also differs: the AMD Athlon is active, while the Intel Xeon is end-of-life.

PCIe support differs by generation. The AMD part offers Gen 3 with 12 lanes from the CPU, while the Intel part provides Gen 2 with no lane count specified. The AMD processor also includes integrated Radeon Vega graphics with 2 compute units, while the Intel Xeon has no integrated graphics listed.

The manufacturing process gap is significant: 14 nm versus 45 nm. This explains the transistor density difference, with AMD packing 3,500 million transistors versus Intel's 820 million, despite the Intel die being physically larger in total area (214 mm² versus 148 mm²).

The Verdict

The benchmark data is unambiguous: the Intel Xeon X5492 outperforms the AMD Athlon PRO 3045B in every head-to-head test. The margins are small, ranging from -4.8% to -4.9%, but they are consistent across all five Cinebench comparisons. If raw compute performance is the sole criterion, the Intel part is the better choice.

However, the data also shows that both processors occupy the same 23rd percentile among all CPUs. Neither is a high-performance part by modern standards. The AMD Athlon PRO 3045B's average benchmark score of 872 is actually higher than the Intel Xeon's 852, though this is partially due to differing benchmark suites.

The Intel Xeon X5492 wins on core count (4 versus 2), base clock speed (3.40 GHz versus 2.30 GHz), and raw benchmark scores. The AMD Athlon PRO 3045B wins on power efficiency (15 watts versus 150 watts), process technology (14 nm versus 45 nm), memory bandwidth (38.4 GB/s versus unlisted), and production status (active versus end-of-life). The AMD part also includes integrated graphics, which the Intel part lacks.

For a modern system, the AMD processor is the more practical choice due to its active production status, lower power draw, DDR4 support, and integrated graphics. For legacy server applications where the Intel Xeon X5492's 4 physical cores and higher clock speed matter, and where the 150-watt TDP is acceptable, the Intel part delivers measurably better Cinebench performance. Both are ECC-capable, which suits reliability-focused workloads.

FAQ

Q: Which processor is faster in single-core workloads?

A: The Intel Xeon X5492 wins all single-core comparisons. It scores 146 versus 139 in Cinebench R20 single-core and 349 versus 332 in Cinebench R23 single-core, a -4.8% and -4.9% delta respectively.

Q: How do the core counts compare?

A: The Intel Xeon X5492 has 4 cores and 4 threads, while the AMD Athlon PRO 3045B has 2 cores and 4 threads. The Intel part has twice the physical cores but the same thread count due to the AMD part's simultaneous multithreading.

Q: Which processor is more power-efficient?

A: The AMD Athlon PRO 3045B has a TDP of 15 watts, while the Intel Xeon X5492 has a TDP of 150 watts. The AMD part draws one-tenth the power of the Intel part.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Athlon PRO 3045B and the Intel Xeon X5492 support ECC memory. The AMD part supports DDR4 in dual-channel, while the Intel part supports DDR2 and DDR3 in dual-channel.

Q: What is the production status of each processor?

A: The AMD Athlon PRO 3045B is listed as active in production, while the Intel Xeon X5492 is end-of-life.

Q: Which processor has integrated graphics?

A: The AMD Athlon PRO 3045B includes Radeon Vega integrated graphics with 2 compute units. The Intel Xeon X5492 has no integrated graphics listed.

Where Each One Wins

The Intel Xeon X5492 wins every benchmark test in the head-to-head comparison. Its victories are consistent across Cinebench R15, R20, and R23, in both single-core and multicore modes. This makes it the clear choice for applications that rely heavily on Cinebench-style rendering performance, which stresses raw CPU compute. The Intel part's 4 physical cores and 3.40 GHz base clock give it a structural advantage in these workloads. The margins are narrow, around 5%, but they are uniform, suggesting the Intel part is slightly stronger across the board in CPU-bound rendering tasks.

The AMD Athlon PRO 3045B wins in every non-benchmark category. Its 15-watt TDP makes it suitable for mobile and low-power systems, while the Intel part's 150-watt TDP requires substantial cooling and power delivery. The AMD part's active production status means it is still available for new designs, whereas the Intel Xeon X5492 is end-of-life. The AMD processor supports DDR4 memory with 38.4 GB/s bandwidth, a modern standard, while the Intel part is limited to DDR2 and DDR3. The AMD part also includes integrated Radeon Vega graphics, eliminating the need for a separate GPU in basic display tasks. The 14 nm process node gives the AMD part a significant efficiency and density advantage over the 45 nm Intel design.

For a system where performance per watt matters, or where modern memory and connectivity are required, the AMD Athlon PRO 3045B is the better fit. For a system where every bit of Cinebench performance counts and power is not a constraint, the Intel Xeon X5492 is the better fit. The data shows a clear trade-off: Intel wins on compute, AMD wins on efficiency and platform modernity.