Intel Core i5-1230U vs Intel Core i7-7700K Comparison

Where Each One Wins

The benchmark split between the Intel Core i7-7700K and the Intel Core i5-1230U is not a simple generational sweep; it is a functional division. The i7-7700K claims 6 wins, while the i5-1230U takes 13, but the nature of those wins tells the real story. The 7700K dominates in workloads that reward raw sustained throughput and large shared caches, while the 1230U wins in tasks that leverage its newer instruction set and higher efficiency cores.

The 7700K's victories are concentrated in Cinebench R15 multicore, Cinebench R23 multicore, Geekbench multicore, PassMark data compression, PassMark extended instructions, and PassMark random string sorting. These are workloads that scale with thread count and cache coherence. The 1230U, by contrast, wins in single-core tests across every major suite, plus encryption, prime number finding, floating point math, integer math, multithreaded PassMark, and physics simulation. This pattern suggests the 1230U is the better choice for mixed productivity and security workloads, while the 7700K retains an edge in specific content creation and compression tasks.

Notably, the two are nearly tied in PassMark single-thread performance, with the 1230U ahead by just 0.1%. This near-parity in single-thread legacy tests contrasts sharply with the 1230U's larger leads in newer single-core benchmarks like Cinebench R23, where it is 11.8% ahead. The data indicates that the 1230U's architectural advantages become more pronounced as workloads modernize.

Architecture Differences

The architectural gap between these two processors is substantial, reflecting five years of Intel development. The 7700K uses the Kaby Lake architecture on a 14 nm process, while the 1230U uses Alder Lake-U on a 10 nm node. The 7700K is a desktop part with 4 cores and 8 threads, while the 1230U is a mobile part with 10 cores and 12 threads, indicating a hybrid design with a mix of performance and efficiency cores.

Cache hierarchies differ significantly. The 7700K has 64 KB of L1 and 256 KB of L2 per core, with 8 MB of shared L3. The 1230U has 80 KB of L1 and 1.25 MB of L2 per core, with 12 MB of shared L3. The larger per-core L2 on the 1230U is particularly notable, as it can reduce latency for frequently accessed data. The 1230U also supports both DDR4 and DDR5 memory, while the 7700K is limited to DDR4, and the 1230U uses PCIe Gen 4 compared to the 7700K's Gen 3.

Integrated graphics differ as well: the 7700K has HD 630, while the 1230U includes Iris Xe 80EU. The 7700K has an unlocked multiplier, making it overclockable, while the 1230U is locked. The 1230U's TDP is 9 watts versus 91 watts for the 7700K, a massive efficiency difference that reflects their desktop versus mobile positioning. The 1230U uses a BGA 1781 socket, while the 7700K uses Socket 1151.

Head-to-Head Benchmarks

The most striking result is in Cinebench R23 multicore, where the 7700K scores 8189 against the 1230U's 4402, a 86% lead. This is the largest single delta in the entire comparison. The 7700K also wins Cinebench R15 multicore decisively, 825 to 514, a 60.5% margin. These results suggest that the 7700K's 4 cores with 8 threads, running at a 4.20 GHz base and 4.50 GHz boost clock, can sustain heavy multicore loads far better than the 1230U's more numerous but lower-power cores.

However, the 1230U reverses this in Cinebench R20 multicore, scoring 3903 versus 3439, an 11.9% win. This inconsistency between Cinebench versions is curious. The R23 result favors the 7700K by a huge margin, while R20 slightly favors the 1230U. The database shows that the 7700K's lead in R15 and R23 is not replicated in R20, indicating workload-specific scaling behavior.

In single-core tests, the 1230U wins consistently. Cinebench R15 single-core shows 186.8 versus 116, a 37.9% advantage. Cinebench R20 single-core shows 550 versus 485, an 11.8% lead. Cinebench R23 single-core shows 1310 versus 1156, another 11.8% lead. Geekbench single-core shows 1699 versus 1547, an 8.9% edge. PassMark single-thread shows 2712 versus 2708, a marginal 0.1% difference.

The 1230U's encryption performance is exceptional. PassMark data encryption shows 7176 versus 3343, a 53.4% advantage. This indicates hardware acceleration for cryptographic workloads. Similarly, PassMark find prime numbers shows 55 versus 31, a 43.6% lead. Floating point math shows 25340 versus 18741, a 26% edge, and integer math shows 38401 versus 30553, a 20.4% lead.

The 7700K counters in PassMark data compression with 136852 versus 114042, a 20% win, and in extended instructions with 8943 versus 6282, a 42.4% margin. Random string sorting also favors the 7700K at 17208 versus 12760, a 34.9% lead.

FAQ

Q: Which processor has the higher average benchmark score?

A: The 7700K has an average benchmark score of 13291, while the 1230U has 12559. The 7700K also sits at the 68th percentile of all CPUs, compared to the 67th percentile for the 1230U.

Q: How do the two compare in Cinebench R23 single-core?

A: The 1230U wins with a score of 1310 against the 7700K's 1156, a lead of 11.8%.

Q: Is the 1230U competitive in multicore workloads?

A: It wins Cinebench R20 multicore (3903 vs 3439) and PassMark multithread (10881 vs 9627), but loses heavily in Cinebench R15 multicore (514 vs 825) and Cinebench R23 multicore (4402 vs 8189).

Q: What is the biggest performance gap between the two?

A: The largest gap is in Cinebench R23 multicore, where the 7700K leads by 86%. The second largest is in Cinebench R15 multicore at 60.5%.

Q: Which processor has better encryption performance?

A: The 1230U is vastly superior, scoring 7176 in PassMark data encryption versus 3343 for the 7700K, a 53.4% advantage.

Q: Are they close in any benchmark?

A: Yes, PassMark single-thread is nearly identical: 2712 for the 1230U versus 2708 for the 7700K, a difference of just 0.1%.

The Verdict

The data paints a clear picture for different use cases. The i7-7700K is the choice for workloads that require sustained multicore throughput in specific rendering and compression tasks. Its 86% lead in Cinebench R23 multicore and 60.5% lead in Cinebench R15 multicore make it the stronger option for those specific rendering workloads. It also holds a 42.4% advantage in extended instructions and a 34.9% lead in random string sorting, indicating strengths in data manipulation tasks.

The i5-1230U is the better all-rounder for modern, mixed workloads. It wins 13 of 19 head-to-head benchmarks, with particular strengths in encryption (53.4% ahead), prime number finding (43.6%), floating point math (26%), and integer math (20.4%). Its single-core performance is consistently superior across Cinebench R15, R20, R23, and Geekbench, making it the better choice for everyday responsiveness and lightly threaded applications.

The 1230U's efficiency is a decisive factor. Its 9 watt TDP versus the 7700K's 91 watts means it can deliver competitive, often superior, performance in most tasks while consuming a fraction of the power. For mobile users, the 1230U is clearly the superior choice. For desktop users running specific rendering and compression workloads, the 7700K retains a meaningful edge, despite its older architecture and higher power draw.

The near-tie in PassMark single-thread (0.1% difference) shows that for legacy single-core applications, the two are effectively interchangeable. The decision ultimately hinges on whether the workload favors the 7700K's specialized multicore wins or the 1230U's broad, modern efficiency and encryption advantages.

Specification Differences

| Specification | Intel Core i7-7700K | Intel Core i5-1230U |

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

| Cores | 4 | 10 |

| Threads | 8 | 12 |

| Base Clock | 4.20 GHz | 1000.00 MHz (1.00 GHz) |

| Boost Clock | 4.50 GHz | 4.40 GHz |

| TDP | 91 W | 9 W |

| Socket | Intel Socket 1151 | Intel BGA 1781 |

| Architecture | Kaby Lake | Alder Lake |

| Codename | Kaby Lake | Alder Lake-U |

| Generation | Core i7 (Kaby Lake) | Core i5 (Alder Lake-U) |

| Process Node | 14 nm | 10 nm |

| L1 Cache | 64 KB (per core) | 80 KB (per core) |

| L2 Cache | 256 KB (per core) | 1.25 MB (per core) |

| L3 Cache | 8 MB (shared) | 12 MB (shared) |

| Memory Support | DDR4 | DDR4, DDR5 |

| Memory Bus | Dual-channel | Dual-channel |

| PCIe | Gen 3, 16 Lanes (CPU only) | Gen 4 |

| Integrated Graphics | HD 630 | Iris Xe 80EU |

| Market Segment | Desktop | Mobile |

| Multiplier Unlocked | Yes | No |

| Release Date | 2017-01-02 | 2022-02-22 |