CPU Comparison

The Intel Core i7-3540M and AMD A8-7650K are both 23rd-percentile performers, yet they achieve parity through opposite designs. The AMD A8-7650K wins the majority of benchmark comparisons in this dataset, taking 5 of 7 head-to-head tests, while the Intel Core i7-3540M scores decisive victories in Geekbench workloads. The data indicates a clear split: the AMD chip leads in Cinebench rendering tests by narrow margins, while Intel dominates in Geekbench by substantial double-digit percentages. These results suggest that the A8-7650K is the more consistent multi-threaded renderer, whereas the i7-3540M excels in memory-latency-sensitive and single-threaded integer workloads.

Where Each One Wins

The AMD A8-7650K claims victory in every Cinebench test recorded, spanning R15, R20, and R23 variants. Its multicore scores of 266 (R15), 1111 (R20), and 2647 (R23) consistently edge out Intel’s 254, 1060, and 2525 respectively. The margins are uniform at roughly 4.5-4.6% across all Cinebench tests, indicating a stable architectural advantage in this specific rendering workload. The single-core Cinebench results follow the same pattern, with AMD scoring 156 and 373 against Intel’s 149 and 356 in R20 and R23 single-core tests.

The Intel Core i7-3540M, conversely, wins both Geekbench tests with commanding margins. Its multicore score of 1160 beats AMD’s 1048 by 10.7%, and its single-core score of 565 surpasses AMD’s 421 by a massive 34.2%. This is not a marginal difference; it is a categorical advantage in Geekbench’s workload profile. The data suggests Intel’s architecture handles the memory-access patterns and instruction mix of Geekbench far more efficiently, despite having only 2 physical cores versus AMD’s 4.

The win tally (5 for AMD, 2 for Intel) is misleading without context. AMD’s wins are narrow and consistent, while Intel’s wins are lopsided. For buyers prioritizing Cinebench-style rendering, the A8-7650K is the safer choice. For general-purpose computing, web browsing, and office tasks that resemble Geekbench’s synthetic load, the i7-3540M’s per-core efficiency provides a noticeably snappier experience.

Architecture Differences

The two chips represent fundamentally different design philosophies from their respective manufacturers. Intel’s Core i7-3540M is built on a 22 nm process with a die size of 118 mm², while AMD’s A8-7650K uses a 28 nm process from GlobalFoundries with a much larger 245 mm² die and 2,411 million transistors. The Intel part is a mobile chip on Socket G2 (988B) with a 35 W TDP, whereas the AMD part is a desktop chip on Socket FM2+ with a 95 W TDP.

Core configuration diverges sharply. The i7-3540M has 2 cores and 4 threads, relying on Hyper-Threading to reach its thread count. The A8-7650K has 4 physical cores and 4 threads, with no SMT. This explains the Cinebench results: AMD’s four integer units can sustain consistent throughput across all cores, while Intel’s two cores plus two logical threads face resource contention.

Cache hierarchies differ in structure. Intel provides 64 KB L1 per core and 256 KB L2 per core, plus a shared 4 MB L3 cache. AMD provides 256 KB total L1 and 4 MB total L2, with no L3 cache at all. The absence of L3 on AMD is partially compensated by its larger L2 pool, but the per-core L2 allocation is 1 MB per core versus Intel’s 256 KB per core. This likely contributes to Intel’s Geekbench advantage in latency-sensitive workloads.

Integrated graphics also differ: Intel pairs the CPU with HD 4000, while AMD integrates Radeon R7. Memory support is DDR3 dual-channel for both, but AMD specifies a memory bandwidth of 34.1 GB/s, a figure Intel does not disclose in this dataset. AMD also lists PCIe Gen 3 with 16 lanes (CPU only), while Intel’s PCIe configuration is not provided. The multiplier is unlocked on AMD only, and AMD’s production status is end-of-life, while Intel’s is unspecified.

FAQ

Q: Which processor has more physical cores?

A: The AMD A8-7650K has 4 physical cores, while the Intel Core i7-3540M has 2 physical cores. Both support 4 threads total, but AMD achieves this through native cores while Intel uses Hyper-Threading.

Q: Does the AMD chip win all benchmark tests?

A: No. AMD wins all five Cinebench tests (R15, R20, R23, plus single-core variants), but Intel wins both Geekbench tests. Intel’s Geekbench multicore score of 1160 beats AMD’s 1048 by 10.7%, and its single-core score of 565 beats AMD’s 421 by 34.2%.

Q: What is the TDP difference between the two?

A: The Intel Core i7-3540M has a 35 W TDP, while the AMD A8-7650K has a 95 W TDP. This makes Intel more suitable for mobile or power-constrained systems, though the AMD chip is a desktop part.

Q: Which CPU has a larger die and more transistors?

A: The AMD A8-7650K has a 245 mm² die with 2,411 million transistors, versus Intel’s 118 mm² die. AMD’s process node is 28 nm compared to Intel’s 22 nm.

Q: Are the Cinebench margins between the two chips large?

A: No, the Cinebench differences are narrow and consistent. AMD leads by 4.5-4.6% in every Cinebench test, with scores of 266 vs 254 (R15), 1111 vs 1060 (R20 multicore), and 2647 vs 2525 (R23 multicore). These are small but uniform advantages.

Q: Which processor has an unlocked multiplier?

A: The AMD A8-7650K has an unlocked multiplier, while the Intel Core i7-3540M does not. This allows overclocking on the AMD platform if the motherboard supports it.

Specification Differences

| Specification | Intel Core i7-3540M | AMD A8-7650K |

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

| Cores | 2 | 4 |

| Threads | 4 | 4 |

| Base Clock | 3.00 GHz | 3.30 GHz |

| Boost Clock | 3.70 GHz | 3.80 GHz |

| TDP | 35 W | 95 W |

| Socket | Intel Socket G2 (988B) | AMD Socket FM2+ |

| Process Node | 22 nm | 28 nm |

| Die Size | 118 mm² | 245 mm² |

| Transistors | Not listed | 2,411 million |

| L1 Cache | 64 KB (per core) | 256 KB |

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

| L3 Cache | 4 MB (shared) | None |

| Memory Bandwidth | Not listed | 34.1 GB/s |

| PCIe | Not listed | Gen 3, 16 Lanes (CPU only) |

| Integrated Graphics | Intel HD 4000 | Radeon R7 |

| Market Segment | Mobile | Desktop |

| Release Date | 2013-01-07 | 2015-01-06 |

| Multiplier Unlocked | No | Yes |

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

Head-to-Head Benchmarks

The most striking result is the Geekbench single-core test, where the Intel Core i7-3540M scores 565 versus AMD’s 421, a 34.2% advantage. This is the largest delta in the entire dataset and indicates that Intel’s Ivy Bridge core has superior per-thread execution efficiency. The Geekbench multicore result (1160 vs 1048, a 10.7% lead) confirms that Intel’s advantage persists even when AMD’s two additional physical cores are engaged. This suggests Geekbench’s workload is not purely parallel but also heavily dependent on memory hierarchy and branch prediction, areas where Intel’s design excels.

Conversely, every Cinebench test favors the AMD A8-7650K by roughly 4.5%. The R15 multicore result (266 vs 254) and R20 multicore result (1111 vs 1060) show AMD’s four cores providing a modest but repeatable throughput edge in heavily threaded rendering. The R23 multicore difference (2647 vs 2525) is the largest absolute gap in AMD’s favor. Even in single-core Cinebench tests, AMD wins: 156 vs 149 in R20 and 373 vs 356 in R23, both around 4.5% advantages. This is counterintuitive given Intel’s Geekbench single-core dominance, but it indicates that Cinebench’s instruction mix (AVX-heavy, floating-point) plays to AMD’s Steamroller architecture strengths.

The deltaPct values in the head-to-head data are consistent: AMD wins Cinebench tests with deltas of -4.5% or -4.6% (where negative indicates AMD’s score is higher), while Intel wins Geekbench tests with deltas of +10.7% and +34.2%. There is no middle ground; each chip decisively owns one benchmark family. The average benchmark scores reflect this split: Intel’s average is 867, AMD’s is 860, a difference of less than 1%.

The Verdict

The data supports a clear selection criterion: choose the AMD A8-7650K if the primary workload is Cinebench-style rendering, and choose the Intel Core i7-3540M for Geekbench-style general-purpose computing. AMD wins all five Cinebench tests with a consistent 4.5% margin, making it the better choice for video encoding, 3D rendering, and other multi-threaded creative workloads. Its 4 physical cores provide predictable scaling across all Cinebench versions tested.

The Intel Core i7-3540M is the better pick for everyday responsiveness and single-threaded applications. Its 34.2% lead in Geekbench single-core is a massive gap that translates to faster launch times, snappier web browsing, and better performance in poorly optimized software. The 10.7% multicore Geekbench lead further reinforces Intel’s advantage in mixed workloads that do not scale perfectly across cores.

The TDP difference (35 W vs 95 W) makes the Intel chip the obvious choice for laptops or compact systems, while the AMD chip requires a desktop platform. The AMD’s lower average benchmark score (860 vs 867) and identical 23rd percentile ranking suggest that, on average, the two perform nearly identically. The deciding factor is workload: rendering favors AMD, general use favors Intel. The AMD chip also offers an unlocked multiplier and end-of-life status, while Intel’s mobile chip has no such overclocking headroom. For users who can tolerate higher power consumption and want consistent multi-threaded rendering, the A8-7650K is the data-backed winner. For everyone else, the i7-3540M’s efficiency and single-core strength make it the more versatile processor.