AMD Opteron 4280 vs AMD PRO A10-8850B Comparison

The AMD Opteron 4280 and the AMD PRO A10-8850B represent two very different AMD design philosophies from different eras. The Opteron 4280 is an 8-core server processor built on the Bulldozer architecture at 32 nm, while the PRO A10-8850B is a 4-core desktop APU built on Steamroller at 28 nm. Despite the A10's newer process and higher clock speeds, the recorded benchmark data shows the Opteron winning every single head-to-head Cinebench test, with margins between 19.6% and 20%. Both processors sit at the 31st percentile among all CPUs in the database, and their average benchmark scores are close: 1107 for the Opteron versus 1098 for the A10. The question is not simply which is faster, but where each design's strengths actually lie.

Where Each One Wins

The head-to-head data is unambiguous: the Opteron 4280 wins all five recorded Cinebench comparisons. In multi-core tests, it leads by 19.9% in Cinebench R15 (385 versus 321), 20% in R20 (1607 versus 1339), and 20% in R23 (3828 versus 3189). In single-core tests, the Opteron also leads by 19.6% in R20 (226 versus 189) and 20% in R23 (540 versus 450). There is no benchmark in the database where the PRO A10-8850B comes out ahead.

That said, the A10's wins are not in CPU compute but in platform features. It carries a Radeon R7 integrated graphics unit, which the Opteron lacks entirely. It also supports PCIe Gen 3 with 16 CPU lanes, whereas the Opteron is limited to PCIe Gen 2. The A10's memory bandwidth is higher at 34.1 GB/s versus 25.6 GB/s, and its base clock is substantially higher at 3.90 GHz versus 2.80 GHz. For workloads that depend on the integrated GPU or on newer PCIe peripherals, the A10 is the only one of the two that can serve at all.

Architecture Differences

The two chips come from different architectural families. The Opteron 4280 uses the Bulldozer architecture with the Valencia codename, built on a 32 nm process at GlobalFoundries. The PRO A10-8850B uses the Steamroller architecture with the Godaveri codename, built on a 28 nm process, also at GlobalFoundries. The process shrink is significant: 28 nm versus 32 nm, and the A10 packs more transistors into a smaller die. The A10 has 2,411 million transistors on a 245 mm² die, while the Opteron has 1,200 million transistors on a 315 mm² die. That is a striking density difference, reflecting both the newer process and the integrated GPU on the A10.

The core counts differ sharply. The Opteron has 8 cores and 8 threads, while the A10 has 4 cores and 4 threads. The Opteron's cache hierarchy is also larger: 384 KB of L1, 8 MB of L2, and 8 MB of shared L3. The A10 has 256 KB of L1, 4 MB of L2, and no L3 at all. The lack of L3 on the A10 is a notable architectural gap, especially given that the Opteron's 8 MB of shared L3 can help feed its eight cores.

The sockets are incompatible: the Opteron uses AMD Socket C32, while the A10 uses AMD Socket FM2+. The Opteron supports ECC memory, the A10 does not. The Opteron is a server/workstation part, the A10 is a desktop part. The Opteron was released in November 2011, the A10 in September 2015, nearly four years later. Both are end-of-life products.

FAQ

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

A: The AMD Opteron 4280 wins all three multi-core comparisons. It scores 385 versus 321 in Cinebench R15 (a 19.9% lead), 1607 versus 1339 in R20 (20% lead), and 3828 versus 3189 in R23 (20% lead).

Q: Does the PRO A10-8850B win any CPU benchmark?

A: No. In the recorded head-to-head data, the Opteron 4280 wins all five benchmarks. The A10's advantages are in platform features, not in Cinebench scores.

Q: Which processor has integrated graphics?

A: Only the AMD PRO A10-8850B has integrated graphics, a Radeon R7 unit. The Opteron 4280 has no integrated graphics at all, which is typical for a server/workstation part.

Q: Do both processors support ECC memory?

A: No. The Opteron 4280 supports ECC memory, while the PRO A10-8850B does not. This makes the Opteron more suitable for error-sensitive server workloads.

Q: What are the memory bandwidth differences?

A: The PRO A10-8850B has a higher memory bandwidth at 34.1 GB/s, compared to 25.6 GB/s for the Opteron 4280. Both use dual-channel DDR3.

Q: Which processor is newer?

A: The PRO A10-8850B was released in September 2015, while the Opteron 4280 was released in November 2011. The A10 is nearly four years newer and uses a 28 nm process versus the Opteron's 32 nm.

Specification Differences

The two processors differ in nearly every major specification category. The Opteron 4280 has 8 cores and 8 threads; the PRO A10-8850B has 4 cores and 4 threads. The Opteron's base clock is 2.80 GHz with a boost of 3.50 GHz; the A10's base clock is 3.90 GHz with a boost of 4.10 GHz. Both have a 95 W TDP.

The cache configurations are very different. The Opteron has 384 KB of L1, 8 MB of L2, and 8 MB of shared L3. The A10 has 256 KB of L1, 4 MB of L2, and no L3 cache. The Opteron's total cache is substantially larger.

Memory support differs in bandwidth and ECC capability. The Opteron supports DDR3 with 25.6 GB/s bandwidth and ECC. The A10 supports DDR3 with 34.1 GB/s bandwidth and no ECC. Both are dual-channel.

PCIe support differs by generation. The Opteron uses PCIe Gen 2, while the A10 uses PCIe Gen 3 with 16 CPU-only lanes. The A10 also includes a Radeon R7 integrated GPU, which the Opteron lacks entirely.

The sockets are incompatible: C32 for the Opteron, FM2+ for the A10. The process nodes differ: 32 nm for the Opteron, 28 nm for the A10. The transistor counts and die sizes also differ: 1,200 million transistors on 315 mm² for the Opteron, 2,411 million transistors on 245 mm² for the A10.

The market segments differ: the Opteron is a Server/Workstation part, the A10 is a Desktop part. The Opteron has a launch MSRP of $255; the A10 has no recorded launch MSRP. Both are end-of-life and neither has an unlocked multiplier.

Head-to-Head Benchmarks

The head-to-head data shows a consistent pattern. In Cinebench R15 multi-core, the Opteron 4280 scores 385 against the A10's 321, a 19.9% advantage. In R20 multi-core, the Opteron scores 1607 against 1339, a 20% advantage. In R23 multi-core, the Opteron scores 3828 against 3189, also a 20% advantage. The multi-core margins are remarkably consistent, hovering right around 20%.

The single-core results tell the same story. In R20 single-core, the Opteron scores 226 against the A10's 189, a 19.6% lead. In R23 single-core, the Opteron scores 540 against 450, a 20% lead. Even though the A10 has a much higher base clock (3.90 GHz versus 2.80 GHz) and boost clock (4.10 GHz versus 3.50 GHz), the Opteron still wins single-core tests by nearly 20%. This suggests that the Opteron's architecture, despite being older, delivers more work per clock in these workloads, or that the A10's lack of L3 cache hurts it even in single-threaded scenarios.

The average benchmark scores in the database reflect this overall picture. The Opteron 4280 has an average score of 1107, while the PRO A10-8850B has an average score of 1098. The Opteron's nearest rivals include the AMD PRO A12-8870 at 1107 (0% delta), the AMD Opteron 3280 at 1106 (0.1% delta), and the AMD Athlon X4 845 at 1106 (0.1% delta). The A10's nearest rivals include the Intel Xeon E5-1603 v3 at 1098 (0% delta), the Intel Pentium 6805 at 1099 (-0.1% delta), and the Intel Core i5-3450S at 1099 (-0.1% delta). Both processors sit at the 31st percentile among all CPUs, meaning they are in the same performance tier overall, despite the Opteron's consistent head-to-head wins.

The Verdict

The data points to a clear conclusion for CPU-bound workloads: the AMD Opteron 4280 is the faster processor. It wins every recorded Cinebench benchmark, both multi-core and single-core, with margins between 19.6% and 20%. Its 8 cores and 8 MB of L3 cache give it a structural advantage that the A10's higher clocks cannot overcome. For server or workstation use, where ECC memory support and the C32 socket are relevant, the Opteron is the only choice between the two.

The PRO A10-8850B is not without merit, but its strengths lie outside the CPU benchmark suite. It has a Radeon R7 integrated GPU, which the Opteron lacks entirely. It supports PCIe Gen 3 with 16 CPU lanes, while the Opteron is limited to PCIe Gen 2. Its memory bandwidth is higher at 34.1 GB/s versus 25.6 GB/s. For a desktop system that needs integrated graphics and modern PCIe connectivity, the A10 is the appropriate pick, even though it loses every CPU benchmark.

The choice between these two processors depends entirely on the use case. A server or workstation workload that values ECC memory, more cores, and larger caches should choose the Opteron 4280. A desktop build that needs integrated graphics, PCIe Gen 3, and higher memory bandwidth should choose the PRO A10-8850B. The benchmark data does not support choosing the A10 for raw CPU compute, but the platform features tell a different story. Both are end-of-life products, so the decision is likely about existing systems or specific platform requirements rather than new purchases.