CPU Comparison

The Intel Core i5-3330 and AMD Opteron 3365 are two legacy processors that, despite their different origins, land in a remarkably close performance bracket. The benchmark data shows the Intel part winning every single head-to-head test, but the margins are razor-thin across the board. With an average benchmark score of 1200 against 1194, these chips are effectively peers in raw throughput, making the decision between them hinge on platform features and workload characteristics rather than outright speed.

Head-to-Head Benchmarks

The data from the Cinebench suite paints a clear picture of near-identical performance, with the Intel Core i5-3330 taking all five benchmark wins by a hair. In the Cinebench R15 multicore test, the i5-3330 scores 351 against the Opteron's 349, a delta of just 0.6%. That margin repeats in the R20 multicore test, where the Intel chip posts 1464 versus 1457, a 0.5% lead. The R23 multicore result follows the same pattern: 3486 for Intel and 3470 for AMD, again a 0.5% difference.

Single-core performance tells the same story. The i5-3330 edges out the Opteron 3365 in Cinebench R20 single-core with 206 points against 205, a 0.5% gap. In R23 single-core, the Intel chip scores 492 compared to 489, a 0.6% margin. These deltas are within the noise of any real-world workload; benchmark results indicate that neither processor offers a meaningful advantage in per-thread performance. The Opteron's higher boost clock of 3.30 GHz versus the i5's 3.20 GHz is not enough to overcome Intel's architectural efficiency in these tests.

When placed against the broader field, both CPUs sit at the 34th percentile of all processors tested, confirming their status as entry-level parts by modern standards. The nearest rivals for the i5-3330 include the AMD Athlon PRO 200GE at an identical 1200 average score and the AMD Ryzen 3 2200G at 1202, a -0.2% delta. The Opteron 3365's nearest rivals include the Intel Core i3-4170 and the Intel Core i7-8665UE, both at 1193, representing a 0.1% delta. These comparisons show that both chips are clustered within a tiny performance band of roughly 1% across several other CPUs, meaning the choice between them is far less about speed than about platform fit.

Architecture Differences

The architectural divide between these two processors is substantial, reflecting their different design goals and eras. The Intel Core i5-3330 is built on the Ivy Bridge architecture using Intel's 22 nm process node, with a die size of 133 mm². It packs 4 cores and 4 threads, with a base clock of 3.00 GHz and a boost clock of 3.20 GHz. Its cache hierarchy consists of 64 KB of L1 per core, 256 KB of L2 per core, and 6 MB of shared L3 cache. The chip draws a TDP of 77 W and uses the Intel Socket 1155.

The AMD Opteron 3365, by contrast, is a server-oriented part from the Opteron 3000 series, based on the K10 architecture with the Delhi codename. It is manufactured on GlobalFoundries' 32 nm process, featuring a much larger die size of 315 mm² and a transistor count of 1,200 million. The Opteron offers 8 cores and 8 threads, but with a lower base clock of 2.30 GHz. Its boost clock of 3.30 GHz is slightly higher than Intel's. The cache layout is notably different: 384 KB of L1, 4 MB of L2, and 8 MB of shared L3. Despite having twice the core count, the Opteron's TDP is lower at 65 W, a result of its lower base frequency and older architecture.

Memory support is similar on paper, both use DDR3 with dual-channel buses, but the Opteron 3365 lists a memory bandwidth of 29.9 GB/s, while the i5-3330 does not specify a figure in the data. The Intel chip supports PCIe Gen 3 with 16 lanes from the CPU, while the Opteron is limited to PCIe Gen 2. The i5-3330 includes integrated Intel HD 2500 graphics, whereas the Opteron's integrated graphics are listed as a chipset feature available only on certain motherboards. The i5-3330 is marked as a desktop part, while the Opteron 3365 is categorized as a server/workstation chip and is listed as end-of-life in production status.

Where Each One Wins

Given the near-identical benchmark scores, the practical wins for each processor come down to platform characteristics rather than performance. The Intel Core i5-3330 wins every synthetic benchmark in the data, but the margins are so small that they are unlikely to translate into perceptible differences in most applications. Its advantage in single-core tests, however small, does suggest it may handle lightly threaded tasks with a slight edge.

The AMD Opteron 3365's real strength lies in its core count and efficiency. With 8 cores versus the i5's 4, the Opteron is architecturally better suited for workloads that can scale across threads, even if the Cinebench multicore results show it trailing by a fraction of a percent. The lower TDP of 65 W against Intel's 77 W also makes the Opteron a more power-efficient choice for dense server environments where thermal headroom is at a premium. The larger 8 MB L3 cache and 4 MB L2 could benefit certain data-heavy workloads that rely on cache residency.

FAQ

Q: Which processor has better multicore performance in Cinebench R23?

A: The Intel Core i5-3330 scores 3486 in Cinebench R23 multicore, while the AMD Opteron 3365 scores 3470, giving Intel a 0.5% lead despite having half the core count.

Q: How do the two processors compare in single-core performance?

A: The i5-3330 wins both single-core tests, scoring 206 in Cinebench R20 and 492 in R23, versus the Opteron's 205 and 489 respectively, with deltas of 0.5% and 0.6%.

Q: What are the core and thread counts for each CPU?

A: The Intel Core i5-3330 has 4 cores and 4 threads. The AMD Opteron 3365 has 8 cores and 8 threads.

Q: Which processor has the higher boost clock?

A: The AMD Opteron 3365 has a boost clock of 3.30 GHz, which is higher than the Intel Core i5-3330's boost clock of 3.20 GHz.

Q: What is the power draw difference between the two?

A: The AMD Opteron 3365 has a TDP of 65 W, while the Intel Core i5-3330 has a TDP of 77 W, making the Opteron more power-efficient on paper.

Q: Are these processors in the same performance percentile?

A: Yes, both the Intel Core i5-3330 and the AMD Opteron 3365 are at the 34th percentile of all CPUs benchmarked.

The Verdict

The data supports a simple conclusion: the Intel Core i5-3330 is the faster chip in every benchmark measured, but the margins are negligible. If the sole criterion is raw Cinebench scores, the i5-3330 is the pick, winning all five head-to-head tests with deltas ranging from 0.5% to 0.6%. However, these differences are so small that they would be imperceptible in real-world use.

For a desktop user with an existing Intel Socket 1155 platform, the i5-3330 is the obvious choice. It offers integrated graphics, PCIe Gen 3 support, and a more modern 22 nm process node. For a server or workstation scenario, the Opteron 3365 presents a more compelling case despite its benchmark losses. Its 8 cores provide headroom for heavily threaded workloads that may not be fully represented in the Cinebench suite, and its 65 W TDP makes it more suitable for power-constrained environments. The Opteron's larger cache pool and end-of-life status should also factor into a purchasing decision, but from a pure performance standpoint, the i5-3330 takes the win.

Specification Differences

| Specification | Intel Core i5-3330 | AMD Opteron 3365 |

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

| Cores | 4 | 8 |

| Threads | 4 | 8 |

| Base Clock | 3.00 GHz | 2.30 GHz |

| Boost Clock | 3.20 GHz | 3.30 GHz |

| TDP | 77 W | 65 W |

| Socket | Intel Socket 1155 | AMD Socket AM3+ |

| Architecture | Ivy Bridge | K10 |

| Codename | Ivy Bridge | Delhi |

| Process Node | 22 nm | 32 nm |

| Foundry | Intel | GlobalFoundries |

| Transistors | Not specified | 1,200 million |

| Die Size | 133 mm² | 315 mm² |

| L1 Cache | 64 KB (per core) | 384 KB |

| L2 Cache | 256 KB (per core) | 4 MB |

| L3 Cache | 6 MB (shared) | 8 MB (shared) |

| Memory Bandwidth | Not specified | 29.9 GB/s |

| PCIe | Gen 3, 16 Lanes (CPU only) | Gen 2 |

| Integrated Graphics | Intel HD 2500 | On certain motherboards (Chipset feature) |

| Market Segment | Desktop | Server/Workstation |

| Production Status | Not specified | End-of-life |

| Part Number | SR0RQ | OS3365OLW8KHK |