Intel Core i5-2550K vs Intel Core i7-3612QM Comparison

The Intel Core i5-2550K and Intel Core i7-3612QM are two processors from the same era that take fundamentally different approaches to performance. The benchmark data shows a clear split: the i7-3612QM wins 6 of 8 head-to-head tests, dominating in Cinebench workloads, while the i5-2550K wins 2 of 8, but with decisive margins in Geekbench. The i5-2550K achieves a 24% lead in Geekbench multi-core and a 39.1% lead in single-core, while the i7-3612QM leads by roughly 8% across all Cinebench versions. Both processors land at the 32nd percentile of all CPUs, with average benchmark scores of 1136 for the i5-2550K and 1129 for the i7-3612QM. This is a contest between a desktop-oriented chip with higher clock speeds and a mobile-oriented chip with more threads and a newer architecture.

Where Each One Wins

The i7-3612QM is the clear winner in rendering and compute-heavy applications that scale with thread count. In Cinebench R15 multi-core, it scores 397 versus the i5-2550K’s 365, an 8.1% advantage. That pattern repeats in Cinebench R20 multi-core (1656 vs 1523, 8% lead) and Cinebench R23 multi-core (3944 vs 3628, 8% lead). The i7-3612QM also wins every single-core Cinebench test, with margins between 7.3% and 7.9%. This consistency suggests that the i7-3612QM’s Ivy Bridge architecture provides a per-clock efficiency advantage in these workloads, even though its boost clock is significantly lower at 3.10 GHz compared to 3.80 GHz.

The i5-2550K wins decisively in Geekbench, which measures more diverse real-world scenarios. Its Geekbench multi-core score of 2096 crushes the i7-3612QM’s 1691, a 24% gap. The single-core gap is even more pronounced: 697 versus 501, a 39.1% advantage. This indicates that the i5-2550K’s higher clock speeds (3.40 GHz base, 3.80 GHz boost) and unlocked multiplier give it a massive edge in latency-sensitive tasks and lightly-threaded applications. The i5-2550K’s desktop socket and 95W TDP allow it to sustain higher frequencies, which Geekbench rewards heavily.

For users choosing between these two, the decision hinges on workload type. The i7-3612QM is the pick for video rendering, 3D modeling, and any multithreaded content creation where Cinebench-style scaling matters. The i5-2550K is the pick for gaming, general desktop responsiveness, and applications that favor raw clock speed over thread count. The i5-2550K’s 4 threads match the i7-3612QM’s 8 threads in Geekbench multi-core, demonstrating that clock speed can overcome a 2x thread deficit in certain scenarios.

Architecture Differences

The two processors come from different Intel microarchitectures and market segments. The i5-2550K is built on Sandy Bridge using a 32 nm process node with 1,160 million transistors on a 216 mm² die. The i7-3612QM uses Ivy Bridge on a 22 nm process with 1,400 million transistors packed into a smaller 160 mm² die. The newer 22 nm process explains why the i7-3612QM can deliver more transistors in a smaller area while consuming far less power.

Both processors have 4 physical cores, but the i7-3612QM adds Hyper-Threading, bringing its thread count to 8 versus the i5-2550K’s 4. Cache configurations are identical: 64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3. However, the i7-3612QM’s Ivy Bridge architecture includes architectural improvements that account for its Cinebench wins despite lower clock speeds.

The biggest functional difference is the integrated graphics. The i5-2550K has no integrated graphics at all, requiring a discrete GPU, while the i7-3612QM includes Intel HD 4000. The i7-3612QM also has a dramatically lower TDP of 35W versus 95W, making it suitable for laptops, hence its mobile socket (Intel Socket G2 988B) versus the i5-2550K’s desktop Socket 1155. The i5-2550K has an unlocked multiplier for overclocking, while the i7-3612QM is locked. Memory support differs too: the i5-2550K supports DDR3 with 25.6 GB/s bandwidth, while the i7-3612QM’s memory support field is null in the data, though it does use dual-channel memory. PCIe support is only listed for the i5-2550K (Gen 2, 16 lanes).

FAQ

Q: Which processor has more threads?

A: The Intel Core i7-3612QM has 8 threads thanks to Hyper-Threading, while the Intel Core i5-2550K has 4 threads.

Q: Does the i5-2550K have integrated graphics?

A: No, the i5-2550K has no integrated graphics, whereas the i7-3612QM includes Intel HD 4000.

Q: Which chip wins in Cinebench R23 multi-core?

A: The i7-3612QM scores 3944 versus the i5-2550K’s 3628, an 8% advantage.

Q: What is the biggest single benchmark victory in the data?

A: The i5-2550K wins Geekbench single-core by 39.1%, scoring 697 versus 501.

Q: Are these processors from the same generation?

A: No, the i5-2550K uses Sandy Bridge architecture on 32 nm, while the i7-3612QM uses Ivy Bridge on 22 nm.

Q: Can the i5-2550K be overclocked?

A: Yes, it has an unlocked multiplier, while the i7-3612QM’s multiplier is locked.

Specification Differences

| Specification | Intel Core i5-2550K | Intel Core i7-3612QM |

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

| Threads | 4 | 8 |

| Base Clock | 3.40 GHz | 2.10 GHz |

| Boost Clock | 3.80 GHz | 3.10 GHz |

| TDP | 95W | 35W |

| Socket | Intel Socket 1155 | Intel Socket G2 (988B) |

| Architecture | Sandy Bridge | Ivy Bridge |

| Process Node | 32 nm | 22 nm |

| Transistors | 1,160 million | 1,400 million |

| Die Size | 216 mm² | 160 mm² |

| Memory Support | DDR3 | Not specified |

| Memory Bandwidth | 25.6 GB/s | Not specified |

| PCIe | Gen 2, 16 Lanes (CPU only) | Not specified |

| Integrated Graphics | None | Intel HD 4000 |

| Market Segment | Desktop | Mobile |

| Launch MSRP | $235 | Not specified |

| Multiplier Unlocked | Yes | No |

| Part Number | SR0QH | SR0MQ |

Head-to-Head Benchmarks

The i7-3612QM’s dominance in Cinebench is uniform and consistent. In Cinebench R15 multi-core, it scores 397 against 365, a 8.1% win. Single-core R15 shows 55 versus 51, a 7.3% advantage. Moving to Cinebench R20, the margins are 8% in multi-core (1656 vs 1523) and 7.7% in single-core (233 vs 215). Cinebench R23 repeats the pattern with a 8% multi-core lead (3944 vs 3628) and a 7.9% single-core lead (556 vs 512). Notably, the i7-3612QM wins single-core Cinebench tests despite a 0.70 GHz lower boost clock, indicating that Ivy Bridge’s IPC improvement over Sandy Bridge is substantial in this benchmark.

The i5-2550K’s Geekbench victories are far larger in percentage terms. Its multi-core score of 2096 is 24% higher than the i7-3612QM’s 1691. The single-core result is even more lopsided: 697 versus 501, a 39.1% gap. These results suggest that Geekbench’s workload mix heavily favors the i5-2550K’s high clock speeds and desktop power envelope. The i5-2550K’s 3.80 GHz boost clock, combined with the ability to sustain it under load due to its 95W TDP, gives it a massive advantage in tests that don’t scale perfectly with thread count.

Across all 8 benchmarks, the i7-3612QM wins 6 while the i5-2550K wins 2. However, the average scores are nearly identical (1136 vs 1129), and both sit at the 32nd percentile of all CPUs. The i5-2550K’s nearest rival is the Intel Core i5-3570T with a 0% delta, while the i7-3612QM matches the Intel Core i5-4690T. This means that despite their architectural and market differences, these chips deliver comparable overall performance in aggregate, just with very different strengths.

The Verdict

The data points to a clear workload-based recommendation. Choose the Intel Core i7-3612QM if your priority is multithreaded rendering, video encoding, or any task that utilizes more than 4 threads. Its 8 threads and 8% Cinebench advantage across all versions make it the superior choice for content creation on the go, and its 35W TDP means it can fit in thin laptops without excessive heat or battery drain. The i7-3612QM’s consistent wins in every Cinebench test, including single-core, demonstrate that its architectural efficiency compensates for lower clock speeds.

Choose the Intel Core i5-2550K if you need raw clock speed for gaming, emulation, or single-threaded productivity. Its 39.1% lead in Geekbench single-core is the largest margin in the entire comparison, and its 24% multi-core win in Geekbench shows that 4 fast cores can beat 8 slower ones in many real-world scenarios. The unlocked multiplier and desktop socket make it a viable overclocking platform, and its higher memory bandwidth (25.6 GB/s) and PCIe Gen 2 support give it an edge in system flexibility. The i5-2550K requires a discrete GPU, but for desktop builders that is often a given.

The i7-3612QM is the more versatile processor overall, winning 6 of 8 benchmarks, but the i5-2550K’s victories are so decisive that it is the better choice for clock-sensitive applications. Both chips are end-of-life or have no production status, but their benchmark profiles remain useful for understanding how architecture and clock speed trade off. The i5-2550K launched at $235 MSRP, while the i7-3612QM has no listed launch price. For a desktop user with an existing GPU, the i5-2550K delivers a more responsive experience in most interactive tasks; for a mobile user who needs to render or compile code, the i7-3612QM is the superior workhorse.