CPU Comparison

The Intel Core i7-3770S and AMD Opteron 6344 land in the same performance tier, with average benchmark scores of 1498 and 1492 respectively. This places both at the 38th percentile of all CPUs, making them direct contemporaries in overall capability despite their radically different designs. The data shows a consistent, though narrow, edge for the Intel part across every shared workload, with the Opteron trailing by margins that rarely exceed two percent.

Head-to-Head Benchmarks

The Intel Core i7-3770S wins all six head-to-head comparisons, but the victories are uniformly slim. In Cinebench R15 multi-core, the Intel scores 529 against the Opteron’s 519, a 1.9% advantage. The single-core gap in the same test is 74 versus 73, or 1.4%. Moving to Cinebench R20, the Intel leads 2205 to 2166 in multi-core (1.8%) and 311 to 305 in single-core (2.0%). Cinebench R23 shows the same pattern: 5251 versus 5158 in multi-core (1.8%) and 741 versus 728 in single-core (1.8%).

The consistency of these margins is notable. Across all six tests, the Intel advantage ranges only from 1.4% to 2.0%, with no workload amplifying either chip’s structural advantages. The largest single delta is the R20 single-core test at 2.0%, while the smallest is R15 single-core at 1.4%. This suggests the two processors have nearly identical effective throughput in Cinebench’s rendering workloads, regardless of thread count. The Opteron’s 12 physical cores do not translate into a multi-core win against the Intel’s 4 cores with 8 threads; in fact, the Intel part wins multi-core tests by roughly the same margin as single-core tests.

Nearest-rival data reinforces this closeness. The Opteron 6344’s average score of 1492 sits 0.4% below the i7-3770S, and the i7-3770S sits 0.1% below the Intel Core i3-8100T. Both chips are effectively interchangeable in aggregate performance, with the i3-8100T and i5-4590S occupying the same narrow band between 1483 and 1500 points.

Architecture Differences

The two processors represent fundamentally divergent design philosophies. The Intel Core i7-3770S is built on Ivy Bridge, a 22 nm process from Intel, with 1,400 million transistors on a 160 mm² die. It pairs 4 cores with 8 threads via Hyper-Threading, running at a 3.10 GHz base clock and 3.90 GHz boost. The cache hierarchy is per-core: 64 KB L1 and 256 KB L2 per core, with 8 MB of shared L3. Memory support is dual-channel DDR3, and the chip includes Intel HD 4000 integrated graphics. It uses PCIe Gen 3 with 16 CPU lanes and fits in an Intel Socket 1155.

The AMD Opteron 6344 comes from the Opteron 6000 series, codenamed Abu Dhabi, and uses the Piledriver architecture on a 32 nm GlobalFoundries process. It packs 12 cores with 12 threads (no SMT) across a massive 2,400 million transistors spread over two 315 mm² dies. The base clock is 2.60 GHz with a 3.20 GHz boost. Cache is organized differently: 576 KB L1 total, 2 MB L2 per module, and 8 MB L3 per die. Memory support is quad-channel DDR3 with a rated 59.7 GB/s bandwidth, and it supports ECC memory. It runs on AMD Socket G34 with PCIe Gen 2 and has no integrated graphics.

The transistor count difference is stark: 2,400 million versus 1,400 million, a 71% advantage for the AMD part. Yet the Intel chip achieves comparable or better performance with far fewer resources, reflecting the efficiency of the 22 nm node versus 32 nm. The Opteron’s dual-die design (2x 315 mm²) also explains its 115 W TDP against the Intel’s 65 W. The memory subsystem differs significantly: the Opteron’s quad-channel controller provides 59.7 GB/s bandwidth, a figure the Intel part does not report, but the Intel’s dual-channel setup and higher clocks compensate in latency-sensitive workloads.

The Opteron targets the server segment with ECC support and a 2012-11-04 release date, while the i7-3770S is a desktop part released on 2012-04-28. The Intel chip is the older design by roughly six months, yet it holds the performance lead. The Opteron is marked end-of-life, while the Intel part’s production status is not specified.

Where Each One Wins

Benchmark results show a clean sweep for the Intel Core i7-3770S, but the practical implications depend on workload context. The Intel part wins every Cinebench iteration, both multi-core and single-core. For rendering tasks that scale with thread count, the Intel’s 8 threads outperform the Opteron’s 12 physical cores, a result that contradicts the raw core-count advantage. The single-core wins, though narrow, indicate higher per-thread efficiency from the Ivy Bridge architecture.

The AMD Opteron 6344’s strengths lie outside the measured benchmarks. Its quad-channel memory with 59.7 GB/s bandwidth and ECC support make it suitable for memory-intensive server workloads, though the benchmark data does not quantify this advantage. The 12 cores provide headroom for highly parallel tasks that are not captured by Cinebench’s rendering engine. The Opteron also offers a higher transistor budget and larger overall die area, which historically correlates with better multi-socket scalability, though the FACT PACK does not include multi-socket benchmarks.

For desktop users, the Intel part’s integrated HD 4000 graphics and lower 65 W TDP make it a more self-contained solution. The Opteron requires a discrete GPU and a server platform. The Intel’s PCIe Gen 3 support also provides modern I/O versus the Opteron’s Gen 2. The launch MSRP of the Opteron was $415, a figure that reflects its server positioning, while the Intel part has no listed launch MSRP.

FAQ

Q: Which processor has more cores?

A: The AMD Opteron 6344 has 12 cores, while the Intel Core i7-3770S has 4 cores. However, the Intel part supports 8 threads versus the Opteron’s 12, and the Intel still wins all multi-core benchmarks by 1.8-1.9%.

Q: What is the performance difference in Cinebench R23 multi-core?

A: The Intel Core i7-3770S scores 5251, and the AMD Opteron 6344 scores 5158, giving the Intel a 1.8% advantage. This is consistent with the 1.9% lead in R15 multi-core (529 versus 519) and the 1.8% lead in R20 multi-core (2205 versus 2166).

Q: Does the Opteron’s higher memory bandwidth help in benchmarks?

A: The Opteron supports quad-channel DDR3 with 59.7 GB/s bandwidth, while the Intel uses dual-channel DDR3. Despite this, the Opteron does not win any of the six shared Cinebench tests, suggesting that memory bandwidth is not a limiting factor in these workloads.

Q: Which chip is more power-efficient?

A: The Intel Core i7-3770S has a 65 W TDP, while the AMD Opteron 6344 has a 115 W TDP. The Intel also achieves higher benchmark scores with lower power draw, indicating better performance-per-watt.

Q: What are the process node differences?

A: The Intel part uses a 22 nm node from Intel, while the AMD part uses a 32 nm node from GlobalFoundries. The Intel chip has 1,400 million transistors, whereas the AMD has 2,400 million across two 315 mm² dies.

Q: Which CPU supports ECC memory?

A: Only the AMD Opteron 6344 supports ECC memory. The Intel Core i7-3770S does not, and it also lacks the Opteron’s server-oriented features like quad-channel memory.

The Verdict

The data supports a clear, if narrow, recommendation for the Intel Core i7-3770S in any workload covered by the benchmarks. It wins all six head-to-head tests, with margins from 1.4% to 2.0%, and does so with a 65 W TDP, integrated graphics, and PCIe Gen 3 support. For desktop users or anyone running Cinebench-style rendering, the Intel part is the superior choice on every measured metric.

The AMD Opteron 6344 remains a viable option only for scenarios that leverage its specific server attributes: ECC memory, quad-channel bandwidth, and 12 physical cores for workloads that scale beyond 8 threads and are not represented in the benchmark set. Its 115 W TDP and lack of integrated graphics make it unsuitable for typical desktop builds. The $415 launch MSRP positions it as a server part, and the data shows it delivers roughly equivalent Cinebench performance to a desktop CPU with far lower power and transistor costs.

The 0.4% aggregate score difference between the two chips is statistically negligible, but the Intel part’s consistency across every test, combined with its architectural efficiency, makes it the safer pick. The Opteron’s end-of-life status further tilts the balance, as does the Intel’s superior single-core performance, which benefits legacy and lightly threaded applications. For anyone choosing between these two based on the available benchmark data, the Intel Core i7-3770S is the clear winner, with the Opteron serving a niche server role that the numbers do not directly evaluate.