CPU Comparison

# FAQ

Q: Which processor has more physical cores, and does that translate into a benchmark advantage?

A: The AMD Opteron 6212 has 8 cores and 8 threads, while the Intel Core i5-3450 has 4 cores and 4 threads. Despite the 2x core count advantage for AMD, the Intel chip wins all five head-to-head benchmark comparisons, including every multi-core test. In Cinebench R23 multi-core, the i5-3450 scores 3842 versus the Opteron's 3377, a 13.8% lead.

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

A: The Intel Core i5-3450 holds a consistent edge in single-core workloads. In Cinebench R23 single-core, Intel scores 542 versus AMD's 476, a 13.9% advantage. The gap is similar in Cinebench R20 single-core, where Intel leads 227 to 199, a 14.1% difference. The Opteron's lower base clock of 2.60 GHz and boost of 3.20 GHz trail Intel's 3.10 GHz base and 3.50 GHz boost.

Q: What are the average benchmark scores, and how close are these two CPUs overall?

A: The Intel Core i5-3450 has an average benchmark score of 1166, while the AMD Opteron 6212 averages 1162. This puts them within 0.4% of each other, with Intel as the slight leader. Both sit at the 33rd percentile among all CPUs, meaning they are statistically near-identical in aggregate performance despite very different architectures and core counts.

Q: Which processor supports ECC memory, and what does that indicate about its target market?

A: The AMD Opteron 6212 supports ECC memory (true), while the Intel Core i5-3450 does not (false). This aligns with their market segments: the Opteron is classified as a Server/Workstation part in the Opteron 6000 series, whereas the i5-3450 is a Desktop processor. The Opteron also features quad-channel memory with 51.2 GB/s bandwidth, double the i5's dual-channel 25.6 GB/s.

Q: What are the process node and transistor differences between these chips?

A: The Intel Core i5-3450 is built on Intel's 22 nm process with 1,400 million transistors on a 160 mm² die. The AMD Opteron 6212 uses GlobalFoundries' 32 nm process with 2,400 million transistors spread across two 315 mm² dies. AMD's use of two dies explains its larger physical footprint and higher transistor count.

Q: Which processor has a higher launch MSRP?

A: The AMD Opteron 6212 has a launch MSRP of $266, while the Intel Core i5-3450 has a launch MSRP of $174. This price difference reflects their different market positioning, with the Opteron targeting server/workstation buyers and the i5 aimed at desktop users.

# Architecture Differences

The Intel Core i5-3450 and AMD Opteron 6212 represent fundamentally different design philosophies from their respective manufacturers. Intel's chip uses the Ivy Bridge architecture, a 22 nm process built at Intel's own foundry, featuring 1,400 million transistors on a single 160 mm² die. AMD's Opteron 6212, codenamed Interlagos, uses the Bulldozer architecture on a 32 nm process from GlobalFoundries, with a much larger footprint: 2,400 million transistors across two 315 mm² dies.

The core configurations diverge sharply. Intel provides 4 cores with 4 threads, each core having 64 KB of L1 and 256 KB of L2 cache, plus a shared 6 MB L3 cache. AMD offers 8 cores with 8 threads, but organizes them differently: 768 KB of L1 total, 2 MB of L2 per module, and 8 MB of L3 per die. This modular design is a hallmark of Bulldozer, where pairs of cores share resources, a tradeoff that explains why the 8-core Opteron cannot outrun the 4-core Intel in threaded workloads.

Memory architecture also separates these two. Intel uses dual-channel DDR3 with 25.6 GB/s bandwidth and no ECC support. AMD uses quad-channel DDR3 with 51.2 GB/s bandwidth and full ECC support. The Opteron's doubled memory bandwidth and ECC capability are typical for server parts, where data integrity and memory throughput matter more than raw core efficiency.

PCI Express support differs as well. Intel provides Gen 3 with 16 lanes (CPU only), while AMD is limited to Gen 2. This gives the i5-3450 a modern I/O advantage despite its desktop orientation. The integrated graphics situation is one-sided: Intel includes HD 2500 graphics, while AMD offers no integrated GPU, reinforcing the Opteron's server-only role.

Clock speeds tell a story of their own. Intel runs at 3.10 GHz base and 3.50 GHz boost; AMD runs at 2.60 GHz base and 3.20 GHz boost. The higher clocks on Intel, combined with a more efficient architecture, directly contribute to its benchmark wins. The Opteron's lower clocks are a compromise for higher core counts and lower power density across its dual-die design.

# The Verdict

The data points to a clear winner for most workloads: the Intel Core i5-3450. It wins all five head-to-head benchmarks, including every multi-core test, despite having half the core count of the AMD Opteron 6212. The i5-3450 leads by 13.8% in Cinebench R15, R20, and R23 multi-core tests, and by 14.1% in R20 single-core. This consistency suggests that Intel's Ivy Bridge architecture extracts far more performance per core than AMD's Bulldozer design.

The Opteron 6212 is not without its niches. Its ECC memory support, quad-channel bandwidth of 51.2 GB/s, and server/workstation classification make it the appropriate choice for memory-intensive, error-sensitive server environments. The 8-core configuration may also benefit workloads that scale with core count but are not represented in the available benchmarks, though the data we have shows Intel winning all threaded tests.

For desktop users, the i5-3450 is the obvious pick. It offers integrated graphics, PCIe Gen 3, a smaller 22 nm process, and superior benchmark scores across the board. Its 77 W TDP is also notably lower than the Opteron's 115 W, making it more efficient for typical desktop tasks.

For server buyers, the Opteron 6212's ECC and memory bandwidth are compelling, but the performance deficit is real. The benchmark results indicate that even in multi-core scenarios, the i5-3450 outperforms it. Unless the workload specifically demands ECC memory or quad-channel bandwidth, the Intel chip delivers better raw performance.

# Specification Differences

| Specification | Intel Core i5-3450 | AMD Opteron 6212 |

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

| Manufacturer | Intel | AMD |

| Series | None | Opteron 6000 series |

| Cores | 4 | 8 |

| Threads | 4 | 8 |

| Base Clock | 3.10 GHz | 2.60 GHz |

| Boost Clock | 3.50 GHz | 3.20 GHz |

| TDP | 77 W | 115 W |

| Socket | Intel Socket 1155 | AMD Socket G34 |

| Architecture | Ivy Bridge | Bulldozer |

| Codename | Ivy Bridge | Interlagos |

| Process Node | 22 nm | 32 nm |

| Foundry | Intel | GlobalFoundries |

| Transistors | 1,400 million | 2,400 million |

| Die Size | 160 mm² | 2x 315 mm² |

| L1 Cache | 64 KB (per core) | 768 KB |

| L2 Cache | 256 KB (per core) | 2 MB (per module) |

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

| Memory Bus | Dual-channel | Quad-channel |

| Memory Bandwidth | 25.6 GB/s | 51.2 GB/s |

| ECC Memory | False | True |

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

| Integrated Graphics | Intel HD 2500 | None |

| Market Segment | Desktop | Server/Workstation |

| Release Date | 2012-04-28 | 2011-11-13 |

| Launch MSRP | $174 | $266 |

| Part Number | SR0PF | OS6212WKT8GGU |

# Head-to-Head Benchmarks

The head-to-head results are unambiguous: the Intel Core i5-3450 wins every single test. In Cinebench R15 multi-core, Intel scores 387 versus AMD's 340, a 13.8% advantage. This pattern repeats exactly in Cinebench R20 multi-core, where Intel's 1613 beats AMD's 1418 by the same 13.8% margin. Cinebench R23 multi-core shows Intel at 3842 versus AMD's 3377, again a 13.8% lead.

Single-core tests follow the same trend. In Cinebench R20 single-core, Intel leads 227 to 199, a 14.1% gap. Cinebench R23 single-core shows Intel at 542 versus AMD's 476, a 13.9% difference. The consistency of these margins, hovering around 14% across all tests, suggests a systematic architectural advantage rather than a workload-specific quirk.

The Geekbench results are only available for the Intel chip, where it scores 1985 multi-core and 681 single-core. The Opteron lacks Geekbench entries in the data, making direct comparison impossible for that test suite. However, the Cinebench results are sufficient to establish a clear pattern.

What is striking is that the Opteron's 8-core advantage never materializes into a win, even in multi-core tests designed to scale with thread count. The Bulldozer architecture's shared resources and lower clocks appear to negate the core-count advantage entirely. The i5-3450's 4 cores at higher clocks, combined with Ivy Bridge's efficiency, consistently produce better results.

# Where Each One Wins

The Intel Core i5-3450 wins in every benchmark category measured. Its strengths are most pronounced in single-core tests, where it leads by 14.1% in Cinebench R20 and 13.9% in R23. This makes it the better choice for applications that rely on single-thread performance, such as legacy software, lightly threaded games, or interactive desktop workloads. Its integrated HD 2500 graphics also give it a functional advantage in basic display output scenarios where the Opteron requires a separate GPU.

The i5-3450's multi-core wins are equally important. Despite having only 4 cores versus 8, it leads by 13.8% in all three Cinebench multi-core tests. This suggests that its per-core efficiency more than compensates for the core count deficit, making it suitable for moderately threaded productivity applications. The lower 77 W TDP also makes it a more power-efficient option.

The AMD Opteron 6212 wins in specific server-oriented categories not covered by the benchmark suite. Its ECC memory support is a critical feature for mission-critical data integrity. Its quad-channel memory bus with 51.2 GB/s bandwidth doubles Intel's throughput, which could benefit memory-bandwidth-sensitive workloads like large database operations or scientific computing. The 8-core design may also help in highly parallel server workloads that are not represented in Cinebench or Geekbench.

The Opteron's server/workstation market segment means it is designed for multi-socket configurations and long-term reliability, though the data does not include benchmarks for those scenarios. Its 115 W TDP is higher, but server platforms typically accommodate such power envelopes. For buyers who need ECC memory and maximum memory bandwidth in a server context, the Opteron 6212 has a clear role, but for raw compute performance, the Intel Core i5-3450 wins decisively.