Intel Core i5-8300H vs Intel Core i7-5775R Comparison

The Intel Core i7-5775R and Intel Core i5-8300H are both 4-core, 8-thread Intel parts, but they come from very different eras and design goals. The i7-5775R is a desktop Broadwell chip with a 65 W TDP, while the i5-8300H is a mobile Coffee Lake-H processor with a 45 W TDP. Despite the generational gap, benchmark results show they are remarkably close in overall performance. The data shows a 7-to-1 win split in favor of the older desktop chip, but the margins are almost always under 2%, making the choice far more nuanced than a simple score comparison.

Where Each One Wins

The Intel Core i7-5775R takes the lion's share of benchmark victories. It wins every Cinebench test, both single-core and multi-core, across the R15, R20, and R23 versions. It also wins the Geekbench multi-core test. The margins are consistent, ranging from 1.6% to 2.3% in its favor on these workloads. For example, in Cinebench R15 multi-core, it scores 641 against 629 for the i5-8300H, a 1.9% lead. In single-core R15, it wins by a slightly larger 2.3%, scoring 90 versus 88. This pattern holds across the newer Cinebench versions, with the i7-5775R leading by 1.8% in R23 multi-core (6360 vs 6245) and 1.8% in R23 single-core (897 vs 881).

The Intel Core i5-8300H has exactly one win to its name, but it is not a trivial one. In Geekbench single-core, it scores 1286 against the i7-5775R's 1218, a decisive 5.3% advantage. This is the largest delta in the entire head-to-head comparison, and it signals that the newer Coffee Lake architecture has a distinct edge in lightly threaded, latency-sensitive workloads. The i5-8300H also has a higher boost clock of 3.90 GHz versus 3.80 GHz, which aligns with this single-core superiority.

Looking at the use-case split, the i7-5775R is the pick for sustained multi-threaded rendering or compilation work, where its consistent 1.8% to 1.9% leads in Cinebench add up over long runs. The i5-8300H is the pick for snappy single-threaded responsiveness, such as general desktop navigation or older games that rely heavily on one core. Its Geekbench single-core win is the clearest signal of that strength.

Architecture Differences

The two processors are separated by three years of Intel development, and the architecture changes reflect that. The i7-5775R uses the Broadwell architecture, built on a 14 nm process with a die size of 182 mm². The i5-8300H uses Coffee Lake-H, also on a 14 nm node, but with a smaller die at 126 mm². Both have 4 cores and 8 threads, so the thread count is identical, but the cache hierarchy differs significantly.

The i7-5775R has 64 KB of L1 and 256 KB of L2 per core, with 6 MB of shared L3. The i5-8300H matches the L1 and L2 sizes per core, but doubles the L3 to 12 MB shared. That extra 6 MB of L3 cache is a notable advantage for the Coffee Lake chip, especially in workloads that reuse a large working set. However, the benchmark data shows that this cache advantage does not translate into overall performance wins, likely because the i7-5775R compensates with a higher base clock (3.30 GHz vs 2.30 GHz) and a different memory subsystem.

Memory support is another clear split. The i7-5775R uses DDR3 with a dual-channel bus and a measured memory bandwidth of 29.9 GB/s. The i5-8300H uses DDR4, but the database does not record a memory bus width or bandwidth figure for it. The integrated graphics differ too: the i7-5775R has Iris Pro Graphics 6200, while the i5-8300H has UHD 630. Both are Intel iGPU solutions, but the Broadwell part was known for its strong integrated graphics relative to its time.

The sockets are not compatible: the i7-5775R uses Intel BGA 1364, and the i5-8300H uses Intel BGA 1440. Both are end-of-life products. Neither has an unlocked multiplier. The i7-5775R carries a launch MSRP of $384, while the i5-8300H has no recorded launch price.

Head-to-Head Benchmarks

The most striking pattern in the head-to-head data is how close these chips are. The i7-5775R wins seven tests, but its largest margin is only 2.3% in Cinebench R15 single-core. The i5-8300H loses six tests by margins under 2%, then wins Geekbench single-core by a full 5.3%. This creates an interesting profile: the older desktop chip is slightly faster in almost everything, but the newer mobile chip has one standout win.

Starting with multi-core, the i7-5775R leads in Cinebench R15 with 641 vs 629 (1.9%), in R20 with 2671 vs 2622 (1.9%), and in R23 with 6360 vs 6245 (1.8%). It also wins Geekbench multi-core with 3996 vs 3920 (1.9%). These are consistent, small advantages that suggest the Broadwell chip sustains its higher base clock better under load. The i5-8300H has a lower 2.30 GHz base clock, and even though it boosts to 3.90 GHz, the sustained multi-core output trails slightly.

In single-core tests, the story is split. The i7-5775R wins Cinebench R15 single-core 90 vs 88 (2.3%), R20 single-core 376 vs 370 (1.6%), and R23 single-core 897 vs 881 (1.8%). But in Geekbench single-core, the i5-8300H strikes back with 1286 vs 1218, a 5.3% lead. This is the only test where the margin exceeds 2.3%, and it is the only test the i5-8300H wins. The discrepancy between Cinebench single-core and Geekbench single-core suggests that the Coffee Lake architecture handles certain integer or memory-latency workloads better, while the Broadwell chip holds its own in the Cinebench rendering engine.

The average benchmark scores tell a similar story. The i7-5775R has an average score of 2031, placing it in the 45th percentile of all CPUs. Its nearest rivals include the Intel Xeon E3-1240 v5 at 2030 (0% delta) and the Intel Xeon E-2124G at 2034 (-0.1% delta). The i5-8300H averages 2005, also in the 45th percentile, with nearest rivals including the Intel Xeon D-1712TR at 2004 (0% delta) and the AMD Ryzen 7 2800H at 2002 (0.2% delta). The two chips are effectively in the same performance tier, separated by roughly 1.3% in average score.

The Verdict

The data makes a clear but narrow recommendation. The Intel Core i7-5775R is the faster processor in the majority of measured workloads. It wins 7 out of 8 tests, including all Cinebench variants and Geekbench multi-core. Its margins are small, but they are consistent and never dip below 1.6%. For anyone running multi-threaded rendering, video encoding, or batch compilation, the i7-5775R is the safer choice based on the recorded benchmark results.

The Intel Core i5-8300H is not a lost cause. Its Geekbench single-core win by 5.3% is the largest single margin in the comparison, and that matters for applications that are latency-bound or heavily dependent on a single thread. Its higher boost clock of 3.90 GHz and larger 12 MB L3 cache are real architectural advantages, even if they only show up clearly in one benchmark. For users who prioritize snappy single-threaded response over sustained multi-core output, the i5-8300H is the better fit.

Neither chip is a clear winner for all tasks. The i7-5775R is the pick for productivity workloads that use all threads, while the i5-8300H is the pick for older games or lightweight applications that favor one core. Given the near-identical average scores (2031 vs 2005) and the same 45th percentile ranking, the choice should hinge on the specific workload mix. The i7-5775R wins more tests, but the i5-8300H wins the one test that often matters most for everyday responsiveness.

FAQ

Q: Which CPU has a higher multi-core score in Cinebench R23?

A: The Intel Core i7-5775R scores 6360, while the Intel Core i5-8300H scores 6245, giving the i7-5775R a 1.8% lead.

Q: Is there any test where the i5-8300H beats the i7-5775R?

A: Yes, in Geekbench single-core, the i5-8300H scores 1286 against 1218, a 5.3% advantage.

Q: What is the difference in L3 cache size?

A: The i7-5775R has 6 MB of shared L3 cache, while the i5-8300H has 12 MB of shared L3 cache.

Q: Do both CPUs have the same number of cores and threads?

A: Yes, both have 4 cores and 8 threads.

Q: What memory types do they support?

A: The i7-5775R supports DDR3 with a dual-channel bus and 29.9 GB/s bandwidth. The i5-8300H supports DDR4, but no bus or bandwidth figures are recorded.

Q: Which chip has a higher base clock?

A: The i7-5775R has a base clock of 3.30 GHz, compared to the i5-8300H's 2.30 GHz.

Specification Differences

| Specification | Intel Core i7-5775R | Intel Core i5-8300H |

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

| Architecture | Broadwell | Coffee Lake |

| Codename | Broadwell | Coffee Lake-H |

| Process Node | 14 nm | 14 nm |

| Die Size | 182 mm² | 126 mm² |

| Base Clock | 3.30 GHz | 2.30 GHz |

| Boost Clock | 3.80 GHz | 3.90 GHz |

| TDP | 65 W | 45 W |

| Socket | Intel BGA 1364 | Intel BGA 1440 |

| L3 Cache | 6 MB (shared) | 12 MB (shared) |

| Memory Support | DDR3 | DDR4 |

| Memory Bus | Dual-channel | Not recorded |

| Memory Bandwidth | 29.9 GB/s | Not recorded |

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

| Integrated Graphics | Iris Pro Graphics 6200 | UHD 630 |

| Market Segment | Desktop | Mobile |

| Release Date | 2015-05-14 | 2018-04-01 |

| Launch MSRP | $384 | Not recorded |