AMD Phenom II X6 1065T vs Intel Core i7-2920XM Comparison

The Intel Core i7-2920XM and AMD Phenom II X6 1065T represent two very different philosophies from their respective eras, yet benchmark data shows a clear and consistent winner. The Intel part wins all five head-to-head comparisons, with a decisive margin of roughly 21-22% across every workload tested. This is not a close contest; the data indicates the i7-2920XM is categorically faster, despite having fewer physical cores than its AMD rival.

Head-to-Head Benchmarks

The most striking pattern in the head-to-head data is the uniformity of Intel’s victory. In Cinebench R15 multi-core, the i7-2920XM scores 353 against the Phenom II X6 1065T’s 290, a 21.7% advantage. That multi-core lead persists almost identically in newer Cinebench versions: R20 multi-core shows 1471 versus 1212 (21.4% delta), and R23 multi-core shows 3504 versus 2888 (21.3% delta). The consistency of these margins suggests a fundamental throughput advantage, not a workload-specific quirk.

Single-core performance tells the same story. In Cinebench R20 single-core, the Intel chip scores 207 versus 170 for AMD, a 21.8% lead. In R23 single-core, the margin is 494 versus 407, a 21.4% delta. Notably, the single-core deltas are nearly identical to the multi-core deltas, which is unusual. This indicates the Intel processor’s advantage is per-thread architectural efficiency, not just thread count or clock speed. The i7-2920XM wins each of the five recorded head-to-head tests, with zero wins for the Phenom II X6 1065T.

The overall benchmark averages reinforce this dominance. The Intel part’s average benchmark score is 995, while the AMD part’s is 993. While these aggregate averages are nearly identical, the head-to-head results show that the Intel processor is faster in every directly comparable test. The near-equal averages reflect that the two chips sit at the same 27th percentile among all CPUs, but that percentile masks the consistent per-test superiority of the Intel part. In practical terms, the i7-2920XM delivers roughly one-fifth more performance in every measured scenario.

Architecture Differences

The architectural gap between these two processors is substantial and explains the benchmark results. The Intel Core i7-2920XM is built on Sandy Bridge architecture using a 32 nm process node, while the AMD Phenom II X6 1065T uses the older K10 architecture (codename Thuban) on a 45 nm node. The Intel chip integrates 1,160 million transistors on a 216 mm² die, whereas the AMD chip packs 904 million transistors onto a larger 346 mm² die. The smaller Intel die with more transistors reflects a denser, more modern manufacturing process.

Core configuration differs significantly. The Intel part has 4 cores and 8 threads, leveraging Hyper-Threading to double its logical thread count. The AMD part has 6 physical cores and 6 threads, with no equivalent multi-threading technology. This means the AMD chip relies on raw core count, while the Intel chip uses both cores and thread duplication. Cache hierarchies also differ: Intel provides 64 KB L1 and 256 KB L2 per core, with 8 MB shared L3. AMD offers larger per-core caches at 128 KB L1 and 512 KB L2, but only 6 MB shared L3. The larger shared L3 on the Intel chip likely contributes to its multi-core efficiency.

Memory and platform support show further divergence. Both use dual-channel memory, but Intel supports DDR3 with a peak bandwidth of 25.6 GB/s, while AMD supports both DDR2 and DDR3 with a lower 21.3 GB/s bandwidth. The Intel part has an unlocked multiplier and integrates Intel HD 3000 graphics. The AMD chip lacks integrated graphics, relying on "certain motherboards (Chipset feature)" for display output. AMD does support ECC memory, which the Intel part does not. The Intel chip uses PCIe Gen 2 with 16 CPU lanes, while AMD lists PCIe Gen 2 without specifying lane count. The Intel processor is a mobile part on Socket G2 (988B) with a 55W TDP; the AMD is a desktop part on Socket AM3 with a 125W TDP.

Where Each One Wins

Based strictly on the benchmark data, the Intel Core i7-2920XM wins everywhere. It outperforms the AMD Phenom II X6 1065T in all five head-to-head tests, covering both single-core and multi-core workloads across multiple Cinebench versions. The smallest margin is 21.3% in R23 multi-core; the largest is 21.8% in R20 single-core. There is no test in the data where the AMD chip takes the lead.

For single-threaded applications, the Intel part’s 21.8% advantage in R20 single-core and 21.4% in R23 single-core makes it the clear choice. This advantage likely stems from the newer Sandy Bridge architecture and higher 3.50 GHz boost clock versus the AMD’s 3.40 GHz boost. For multi-threaded workloads, the Intel part maintains its edge despite having only 4 physical cores against AMD’s 6. The Intel chip’s 8 threads, combined with its 8 MB shared L3 cache, enable it to outperform the 6-thread AMD processor. In R15 multi-core, the Intel chip scores 353 to AMD’s 290, proving that thread count alone does not determine victory.

The AMD Phenom II X6 1065T has no benchmark wins to claim. Its higher base clock of 2.90 GHz versus Intel’s 2.50 GHz does not translate into any performance victory. The only areas where the AMD chip shows superiority are non-performance specifications: it supports ECC memory, offers DDR2 compatibility, and has a larger 346 mm² die. But in every measured benchmark, the Intel processor wins by a substantial margin.

The Verdict

The data is unambiguous: choose the Intel Core i7-2920XM for any performance-sensitive task. It wins every head-to-head benchmark by at least 21.3%, with consistent margins across single-core and multi-core tests. The Intel chip’s 8 threads, larger shared L3 cache, and higher memory bandwidth of 25.6 GB/s (versus 21.3 GB/s) give it a decisive edge over the 6-thread AMD part. The Intel processor also offers an unlocked multiplier for overclocking, which the AMD chip lacks.

The AMD Phenom II X6 1065T is only preferable if specific platform requirements dictate otherwise. It supports ECC memory, which the Intel chip does not, and it works with both DDR2 and DDR3 memory. It also has a lower launch position in terms of market segment—desktop versus mobile—and a higher 125W TDP, which could matter for systems designed around desktop power envelopes. However, from a pure performance standpoint, the AMD chip is categorically inferior, losing every recorded benchmark by roughly one-fifth.

The near-identical average benchmark scores (995 for Intel, 993 for AMD) and identical 27th percentile ranking might suggest parity, but the head-to-head results contradict that. The Intel i7-2920XM is the faster processor in every direct comparison, and the data shows no scenario where the AMD Phenom II X6 1065T outperforms it.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i7-2920XM wins all multi-core tests. In Cinebench R23 multi-core, it scores 3504 versus 2888 for the AMD Phenom II X6 1065T, a 21.3% advantage. Similar margins appear in R15 (353 vs 290) and R20 (1471 vs 1212).

Q: Does the AMD chip’s 6 cores beat Intel’s 4 cores?

A: No. Despite having 6 physical cores versus Intel’s 4, the AMD Phenom II X6 1065T loses every multi-core benchmark. The Intel chip uses 8 threads (4 cores with Hyper-Threading) and still beats the AMD’s 6 threads by roughly 21%.

Q: What is the single-core performance difference?

A: The Intel part leads in single-core tests by 21.8% in Cinebench R20 (207 vs 170) and 21.4% in R23 (494 vs 407). This is consistent with its higher 3.50 GHz boost clock versus AMD’s 3.40 GHz.

Q: Do both processors have the same overall performance ranking?

A: Both sit at the 27th percentile among all CPUs, and their average benchmark scores are nearly identical (995 for Intel, 993 for AMD). However, the head-to-head data shows Intel winning all five tests, so the similar averages mask a consistent per-test Intel advantage.

Q: Which chip supports ECC memory?

A: The AMD Phenom II X6 1065T supports ECC memory, while the Intel Core i7-2920XM does not. The AMD chip also supports both DDR2 and DDR3 memory, whereas the Intel chip supports only DDR3.

Q: Are there any benchmarks where the AMD Phenom II X6 1065T wins?

A: No. In the head-to-head data, the AMD chip records zero wins. The Intel i7-2920XM wins all five comparisons, with deltas ranging from 21.3% to 21.8%.

Specification Differences

| Specification | Intel Core i7-2920XM | AMD Phenom II X6 1065T |

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

| Cores | 4 | 6 |

| Threads | 8 | 6 |

| Base Clock | 2.50 GHz | 2.90 GHz |

| Boost Clock | 3.50 GHz | 3.40 GHz |

| TDP | 55 W | 125 W |

| Socket | Intel Socket G2 (988B) | AMD Socket AM3 |

| Architecture | Sandy Bridge | K10 |

| Codename | Sandy Bridge | Thuban |

| Process Node | 32 nm | 45 nm |

| Transistors | 1,160 million | 904 million |

| Die Size | 216 mm² | 346 mm² |

| L1 Cache | 64 KB (per core) | 128 KB (per core) |

| L2 Cache | 256 KB (per core) | 512 KB (per core) |

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

| Memory Support | DDR3 | DDR2, DDR3 |

| Memory Bandwidth | 25.6 GB/s | 21.3 GB/s |

| ECC Memory | false | true |

| Integrated Graphics | Intel HD 3000 | On certain motherboards (Chipset feature) |

| Market Segment | Mobile | Desktop |

| Release Date | 2011-01-02 | 2010-12-06 |

| Launch MSRP | $1096 | null |

| Multiplier Unlocked | true | false |