AMD Opteron 3280 vs AMD PRO A12-8870 Comparison

The AMD PRO A12-8870 and AMD Opteron 3280 deliver nearly identical benchmark results, with the PRO A12-8870 taking a narrow 5-0 win in head-to-head tests. However, the data reveals that these two processors achieve parity through radically different designs: the PRO A12-8870 is a 4-core, 4-thread Excavator part built on 28nm, while the Opteron 3280 is an 8-core, 8-thread K10 part built on 32nm. The average benchmark scores are effectively tied at 1107 versus 1106, and both sit at the 31st percentile of all CPUs, making this a comparison of two approaches that land in the same performance tier despite their architectural divergence.

Architecture Differences

The PRO A12-8870 uses the Excavator architecture on the Carrizo codename, built on a 28nm process node at GlobalFoundries. It integrates 3,100 million transistors on a 250 mm² die. The Opteron 3280 uses the older K10 architecture with the Zurich codename, built on a 32nm process node, also at GlobalFoundries, but with 1,200 million transistors on a larger 315 mm² die. The transistor count difference is stark — the PRO A12-8870 packs more than 2.5 times the transistors of the Opteron 3280 into a smaller die, reflecting the denser Excavator design.

Cache structures diverge significantly. The PRO A12-8870 has 320 KB of L1 cache and 2 MB of L2 cache, with no L3 cache at all. The Opteron 3280 counters with 384 KB of L1 cache, 8 MB of L2 cache, and an additional 8 MB of shared L3 cache. This gives the Opteron a massive total cache advantage — 16 MB versus just over 2 MB — which should theoretically help in workloads with large working sets. The PRO A12-8870 compensates with higher clock speeds and a newer architecture, as the benchmark results show this cache deficit does not translate into a performance loss.

The integrated graphics situation also differs. The PRO A12-8870 includes Radeon R7 integrated graphics, making it a complete APU solution. The Opteron 3280 lists integrated graphics only as available on certain motherboards as a chipset feature, meaning it is not a true on-die graphics solution. Memory support differs as well: the PRO A12-8870 uses DDR4 on a dual-channel bus with 38.4 GB/s bandwidth, while the Opteron 3280 uses DDR3 on a dual-channel bus with 29.9 GB/s bandwidth — a 28.4% bandwidth advantage for the PRO part.

Specification Differences

The core and thread counts are the most obvious difference: the PRO A12-8870 has 4 cores and 4 threads, while the Opteron 3280 has 8 cores and 8 threads. Clock speeds favor the PRO part, with a base clock of 3.70 GHz and boost clock of 4.20 GHz, compared to the Opteron's 2.50 GHz base and 3.50 GHz boost. Both have a 65W TDP, but the Opteron achieves this with more cores at lower clocks.

The sockets are incompatible: the PRO A12-8870 uses AMD Socket AM4, while the Opteron 3280 uses AMD Socket AM3+. PCIe generations differ, with the PRO part supporting Gen 3 and the Opteron limited to Gen 2. Neither processor has an unlocked multiplier. The production status shows the PRO A12-8870 as Active, while the Opteron 3280 is End-of-life, with a release date of 2012-03-19. The Opteron has a launch MSRP of $229, while the PRO part has no listed launch MSRP. Neither supports ECC memory. The part numbers are AD887BAUM44AB for the PRO and OS3280OLW8KGU for the Opteron.

Where Each One Wins

The benchmark data shows the PRO A12-8870 wins all five head-to-head tests, but the margins are minuscule. The largest win is a 0.2% delta in Cinebench R23 single-core, where it scores 454 versus 453. The PRO part also wins Cinebench R20 multi-core by 0.1% (1351 versus 1350) and Cinebench R23 multi-core by 0.1% (3218 versus 3215). Two tests — Cinebench R15 multi-core and Cinebench R20 single-core — are exact ties at 324 and 190 respectively.

Given the Opteron's 8 cores versus the PRO's 4, one might expect the Opteron to win multi-threaded workloads. The data shows this is not the case — the Opteron's lower clock speeds and older K10 architecture erase its core advantage entirely. The PRO A12-8870 wins in every scenario where a winner is declared, but the real story is parity. Neither CPU establishes a meaningful lead in any test, making this a comparison where the "winner" is determined by rounding rather than actual performance dominance. The PRO part's 0.2% single-core win is the largest margin in the entire head-to-head set, which is negligible in real-world terms.

Head-to-Head Benchmarks

The Cinebench R15 multi-core test produces an exact tie at 324 points for both processors. This is remarkable given the Opteron's 8 cores — the PRO A12-8870's 4 Excavator cores match the 8 K10 cores at this workload. Moving to Cinebench R20 multi-core, the PRO A12-8870 scores 1351 against the Opteron's 1350, a 0.1% delta. The single-core R20 test is another exact tie at 190 points. In Cinebench R23 multi-core, the PRO scores 3218 versus 3215, again a 0.1% delta. The largest divergence appears in Cinebench R23 single-core, where the PRO scores 454 against 453, a 0.2% delta.

These results show that the Opteron's 8 MB of L2 and 8 MB of L3 cache provide no measurable benefit in Cinebench workloads. The PRO A12-8870's higher clocks — 3.70 GHz base versus 2.50 GHz base — and newer architecture fully compensate for having half the cores and a fraction of the cache. The average benchmark scores confirm the tie: the PRO A12-8870 averages 1107, while the Opteron averages 1106. In the nearest rivals list, the Opteron 4280 scores 1107 with a 0% delta from the PRO, and the AMD Athlon X4 845 scores 1106 with a 0.1% delta. The Opteron 3280 itself appears in the PRO's rivals list at 1106 with a 0.1% delta, confirming the two are functionally equivalent in aggregate performance.

FAQ

Q: Which processor has more cores?

A: The AMD Opteron 3280 has 8 cores and 8 threads, while the AMD PRO A12-8870 has 4 cores and 4 threads.

Q: Do the extra cores of the Opteron 3280 translate into better multi-core benchmark scores?

A: No. The Opteron 3280 scores 324 in Cinebench R15 multi-core and 3215 in Cinebench R23 multi-core, while the PRO A12-8870 scores 324 and 3218 respectively. The PRO part wins or ties in every multi-core test despite having half the cores.

Q: What is the clock speed difference between the two?

A: The PRO A12-8870 has a base clock of 3.70 GHz and a boost clock of 4.20 GHz. The Opteron 3280 has a base clock of 2.50 GHz and a boost clock of 3.50 GHz.

Q: Do both processors support the same memory type?

A: No. The PRO A12-8870 supports DDR4 with 38.4 GB/s bandwidth, while the Opteron 3280 supports DDR3 with 29.9 GB/s bandwidth. Both use dual-channel memory buses.

Q: Which processor has integrated graphics?

A: The PRO A12-8870 includes Radeon R7 integrated graphics on-die. The Opteron 3280 does not have true integrated graphics, only a chipset feature available on certain motherboards.

Q: What are the production statuses of the two processors?

A: The PRO A12-8870 is listed as Active production, while the Opteron 3280 is End-of-life with a release date of 2012-03-19.

The Verdict

The data presents a clear conclusion: the AMD PRO A12-8870 and AMD Opteron 3280 are performance equals in Cinebench workloads, with the PRO part taking a nominal 5-0 win on margins that never exceed 0.2%. The PRO A12-8870 is the better choice for users who want a modern, active processor with DDR4 support, PCIe Gen 3, and integrated Radeon R7 graphics. It achieves identical performance to the Opteron with half the cores, relying on higher clocks and a newer architecture.

The Opteron 3280, despite being end-of-life and using an older socket, offers no performance advantage in the tested benchmarks. Its 8 cores and larger cache do not yield any wins, and its DDR3 support and PCIe Gen 2 are older standards. The only reason to consider the Opteron 3280 would be platform compatibility with AMD Socket AM3+ motherboards, but the benchmark data offers no performance justification for choosing it over the PRO A12-8870.

For users deciding between these two, the PRO A12-8870 is the data-supported pick. It matches or exceeds the Opteron in every benchmark, provides integrated graphics, uses newer memory and PCIe standards, and remains in active production. The Opteron 3280's end-of-life status and lack of any benchmark wins make it a less compelling option despite its higher core count. In aggregate, both processors sit at the 31st percentile of all CPUs, placing them in the entry-level desktop segment where the PRO A12-8870's modern feature set gives it the practical edge.