Intel Core i5-5675R vs Intel Core i7-3770K Comparison

Head-to-Head Benchmarks

The benchmark record splits sharply between the two processors. The Intel Core i7-3770K takes the Cinebench suite outright, while the Intel Core i5-5675R dominates Geekbench. Out of eight recorded tests, the i7-3770K wins six, and the i5-5675R takes two.

In Cinebench R15 multi-core, the i7-3770K scores 558 against 476 for the i5-5675R, a 17.2% advantage. The single-core result follows the same path: 78 versus 67, a 16.4% lead. Moving to Cinebench R20, the multi-core gap widens slightly to 17.1%, with scores of 2327 and 1987. The single-core R20 test mirrors that margin exactly, 328 against 280. Cinebench R23 repeats the pattern once more: 5542 versus 4733 in multi-core, and 782 versus 668 in single-core, both at a 17.1% delta.

The story inverts completely on Geekbench. The i5-5675R posts a multi-core score of 3738, beating the i7-3770K's 3027 by 19%. In single-core, the lead stretches to 30.3%, with 1234 versus 860. That is a decisive swing, and it suggests the two processors are optimized for different workloads despite their similar desktop positioning.

The average benchmark score tells a tighter story. The i7-3770K sits at 1688, while the i5-5675R trails at 1648, a difference of roughly 2.4%. Both land in the 40th percentile of all CPUs in the database, meaning neither is a top-tier part by modern standards. The i7-3770K's nearest rivals include the Intel Core i7-5850HQ at a 0% delta, the AMD Ryzen 7 3750H at -0.1%, and the Intel Core i7-980 at -0.3%. The i5-5675R's closest neighbors are the Intel Core i7-4810MQ at -0.2%, the Intel Core i7-5700HQ at 0.2%, and the AMD Opteron 6380 at 0.3%. Both chips sit in a crowded mid-range pack, but the i7-3770K holds a slim aggregate edge.

Architecture Differences

The two processors come from different generations and different process nodes. The i7-3770K is built on Ivy Bridge at 22 nm, while the i5-5675R uses Broadwell at 14 nm. That node shrink gives the i5-5675R a transistor density advantage, though the database lists the i7-3770K at 1,400 million transistors and the i5-5675R's count as unavailable. Die size moves the other way: the i5-5675R measures 182 mm² versus 160 mm² for the i7-3770K, so the newer node does not translate into a smaller physical package.

Core counts are identical at four, but threading diverges. The i7-3770K supports eight threads through Hyper-Threading, while the i5-5675R is limited to four. That explains the i7-3770K's consistent multi-core wins in Cinebench, where thread count matters heavily. Clock speeds also favor the older chip: the i7-3770K runs at 3.50 GHz base and 3.90 GHz boost, versus 3.10 GHz base and 3.60 GHz boost for the i5-5675R. The i7-3770K also has double the L3 cache, 8 MB shared against 4 MB shared, and it carries an unlocked multiplier for overclocking. The i5-5675R is locked.

Cache hierarchy for L1 and L2 is identical: 64 KB per core and 256 KB per core respectively. Memory support is DDR3 on both, with dual-channel buses, but bandwidth differs. The i7-3770K reaches 25.6 GB/s, while the i5-5675R reaches 29.9 GB/s, a 16.8% improvement that likely feeds its Geekbench strength. PCIe is Gen 3 with 16 lanes on both.

Integrated graphics mark a major generational leap. The i7-3770K pairs with Intel HD 4000, while the i5-5675R ships with Iris Pro Graphics 6200. The database does not provide benchmark scores for the iGPUs, but the naming alone signals a substantial upgrade in visual capability. Socket and packaging differ as well: the i7-3770K uses Intel Socket 1155, while the i5-5675R uses Intel BGA 1364, meaning the latter is soldered rather than socketed.

Production status also contrasts. The i7-3770K is end-of-life, released in April 2012, while the i5-5675R is marked active, released in May 2015. The i7-3770K carries a launch MSRP of $313; the i5-5675R lists at $265. Neither supports ECC memory.

FAQ

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

A: The Intel Core i7-3770K wins with a score of 5542 against 4733 for the Intel Core i5-5675R, a 17.1% advantage.

Q: How large is the Geekbench single-core gap?

A: The Intel Core i5-5675R leads by 30.3%, scoring 1234 versus 860 for the Intel Core i7-3770K.

Q: Do both processors have the same number of cores?

A: Yes, both have four cores. The i7-3770K adds eight threads, while the i5-5675R is limited to four threads.

Q: Which processor has a smaller manufacturing node?

A: The Intel Core i5-5675R uses a 14 nm process, while the Intel Core i7-3770K uses 22 nm.

Q: Is the i7-3770K overclockable?

A: Yes, the i7-3770K has an unlocked multiplier. The i5-5675R does not.

Q: What is the memory bandwidth difference?

A: The i5-5675R provides 29.9 GB/s, while the i7-3770K provides 25.6 GB/s.

Specification Differences

| Specification | Intel Core i7-3770K | Intel Core i5-5675R |

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

| Threads | 8 | 4 |

| Base clock | 3.50 GHz | 3.10 GHz |

| Boost clock | 3.90 GHz | 3.60 GHz |

| TDP | 77 W | 65 W |

| Socket | Intel Socket 1155 | Intel BGA 1364 |

| Architecture | Ivy Bridge | Broadwell |

| Process node | 22 nm | 14 nm |

| Die size | 160 mm² | 182 mm² |

| L3 cache | 8 MB (shared) | 4 MB (shared) |

| Memory bandwidth | 25.6 GB/s | 29.9 GB/s |

| Integrated graphics | Intel HD 4000 | Iris Pro Graphics 6200 |

| Multiplier | Unlocked | Locked |

| Release date | 2012-04-28 | 2015-05-14 |

| Production status | End-of-life | Active |

| Launch MSRP | $313 | $265 |

TDP differs by 12 watts, with the i5-5675R drawing less power at 65 W versus 77 W. Transistor count is listed only for the i7-3770K at 1,400 million; the i5-5675R's count is absent from the database. Both support DDR3 memory, dual-channel buses, Gen 3 PCIe with 16 lanes, and neither supports ECC.

Where Each One Wins

The Intel Core i7-3770K is the clear pick for threaded productivity workloads. Its eight threads, higher clocks, and larger L3 cache give it a 17% edge across every Cinebench iteration, from R15 through R23, in both single and multi-core tests. That consistency is notable: the delta holds steady at 16.4% to 17.2% across all six Cinebench runs. For rendering, video encoding, or any application that scales with thread count, the i7-3770K is the stronger part. Its unlocked multiplier also makes it the choice for overclockers, provided the platform supports it.

The Intel Core i5-5675R wins in Geekbench, and it wins big. The 30.3% single-core lead and 19% multi-core lead suggest superior per-clock efficiency, likely from the 14 nm Broadwell architecture and higher memory bandwidth. For tasks that favor memory throughput or lightly threaded performance, such as certain gaming scenarios, general desktop responsiveness, or applications that do not use more than four threads, the i5-5675R pulls ahead. Its Iris Pro Graphics 6200 also gives it a clear advantage for systems relying on integrated graphics, though the database does not quantify that difference.

The i7-3770K holds the aggregate benchmark edge at 1688 average score versus 1648, but the margin is narrow. Both processors sit at the 40th percentile, so neither is a standout in the current CPU landscape. The i7-3770K is a legacy part, end-of-life and socket-bound to the aging LGA 1155 platform. The i5-5675R is active but soldered via BGA 1364, which limits upgrade paths and cooling options. For a system builder today, the choice hinges on workload: the i7-3770K for multi-threaded rendering, the i5-5675R for memory-sensitive and single-threaded tasks with a better integrated GPU. Neither is a universal winner, and the benchmark data reflects that split cleanly.