Intel Core i5-8269U vs Intel Core i7-990X Comparison

Where Each One Wins

The benchmark data presents an unusual scenario: across every Cinebench workload recorded in the database, the Intel Core i7-990X wins. The i5-8269U does not secure a single victory in any of the six head-to-head tests. This is not a case of one chip dominating in multithreaded tasks while the other takes single-threaded honors; the i7-990X leads in both categories, though by very narrow margins.

The i5-8269U is a mobile processor with a 28 W TDP, designed for thin-and-light laptops. Its strength lies in efficiency and portability, not in raw benchmark supremacy. The data shows it trails the i7-990X by margins ranging from 0.3% to 1.2% across all Cinebench tests. These are close enough that real-world differences would be imperceptible in most workloads, but the pattern is consistent: the older desktop part edges out the newer mobile part everywhere.

The i7-990X, despite being a 2011-era desktop extreme processor, holds a slight advantage in every measured scenario. Its six physical cores and twelve threads give it a structural edge in multithreaded rendering, while its higher base clock of 3.47 GHz helps it stay competitive even in single-threaded tasks where the i5-8269U's 4.20 GHz boost clock might be expected to dominate. The result is a chip that wins across the board, but never by a decisive amount.

For users prioritizing mobility, the i5-8269U is the only reasonable choice given its socket and integrated graphics. For users prioritizing raw benchmark performance, even at a modest 0.3% to 1.2% level, the i7-990X is the winner in every database-recorded test. The i5-8269U's place is in systems where power consumption and integrated graphics matter more than the last few percentage points of Cinebench performance.

Architecture Differences

These two processors come from different eras and design philosophies. The i5-8269U is built on Intel's 14 nm process and uses the Kaby Lake architecture, specifically the Kaby Lake-R refresh. It is a quad-core, eight-thread part with a base clock of 2.60 GHz and a boost clock of 4.20 GHz. Its die size is 123 mm², and it uses the Intel BGA 1356 socket, which is soldered onto the motherboard in mobile systems.

The i7-990X, by contrast, is a 32 nm Westmere part from the Gulftown generation. It is a six-core, twelve-thread processor with a base clock of 3.47 GHz and a boost clock of 3.73 GHz. Its die is substantially larger at 239 mm² and contains 1,170 million transistors. It uses the Intel Socket 1366, a desktop platform socket. The i7-990X also has an unlocked multiplier, allowing overclocking, while the i5-8269U's multiplier is locked.

Cache configurations differ meaningfully. Both parts have 64 KB of L1 cache per core and 256 KB of L2 cache per core, but the shared L3 cache is twice as large on the i7-990X: 12 MB shared versus 6 MB shared on the i5-8269U. This larger cache pool likely contributes to the i7-990X's ability to keep pace with or slightly exceed the newer chip in single-threaded tests despite its lower boost clock.

Memory support also diverges. The i5-8269U supports DDR4 memory, while the i7-990X supports DDR3 with a triple-channel memory bus. The i7-990X provides PCIe Gen 2 connectivity, while the i5-8269U's PCIe configuration is not recorded in the database. The i5-8269U includes integrated Iris Pro Plus graphics, whereas the i7-990X has no integrated graphics at all, requiring a discrete GPU.

Production status differs as well. The i5-8269U is listed as Active, while the i7-990X is End-of-life. The i7-990X was released on 2011-02-23, and the i5-8269U on 2018-04-04. The market segments reflect their intended use: Mobile for the i5-8269U, Desktop for the i7-990X.

Head-to-Head Benchmarks

The Cinebench R15 multicore test shows the i7-990X scoring 611 against the i5-8269U's 609, a delta of -0.3% favoring the i7-990X. This is nearly a tie, but the six-core part manages to edge out the quad-core part despite its much older architecture. In Cinebench R15 single-core, the i7-990X scores 86 versus 85, a 1.2% advantage. This is the largest margin in any test, and it is notable because the i5-8269U has a significantly higher boost clock of 4.20 GHz versus 3.73 GHz. The i7-990X's higher base clock of 3.47 GHz and larger L3 cache appear to compensate.

Cinebench R20 multicore repeats the pattern: the i7-990X scores 2549, the i5-8269U scores 2538, a 0.4% difference. Single-core R20 shows 359 versus 358, another 0.3% win for the i7-990X. Cinebench R23 multicore sees the i7-990X at 6071 and the i5-8269U at 6044, again a 0.4% gap. R23 single-core has the i7-990X at 857 and the i5-8269U at 853, a 0.5% difference.

The consistency is striking. Across six tests spanning three Cinebench versions, the i7-990X wins every time, but the margins never exceed 1.2%. The average benchmark score in the database tells a similar story: the i5-8269U averages 1748, while the i7-990X averages 1713. Interestingly, the i5-8269U has the higher average score despite losing every head-to-head test, which reflects differences in how average scores are computed versus direct comparisons.

In terms of percentile ranking, the i5-8269U sits at the 41st percentile among all CPUs, while the i7-990X sits at the 40th percentile. These are effectively equivalent standing within the database's broader CPU landscape. The i5-8269U's nearest rivals include the AMD Ryzen 3 PRO 3200GE at an average score of 1750 (0.1% higher), the Intel Core i7-980X at 1746 (0.1% lower), the Intel Core i5-6600 at 1744 (0.3% lower), and the AMD Ryzen 3 4300U at 1742 (0.4% lower). The i7-990X's nearest rivals include the AMD Ryzen 7 PRO 2700U at 1715 (0.1% higher), the Intel Core i7-4910MQ at 1716 (0.1% higher), the Intel Xeon E5-1620 v3 at 1709 (0.2% lower), and the Intel Xeon E3-1265L v4 at 1709 (0.2% lower).

Specification Differences

The table below lists only the fields where the two processors differ, per the database records.

| Field | Intel Core i5-8269U | Intel Core i7-990X |

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

| Cores | 4 | 6 |

| Threads | 8 | 12 |

| Base clock | 2.60 GHz | 3.47 GHz |

| Boost clock | 4.20 GHz | 3.73 GHz |

| TDP | 28 W | 130 W |

| Socket | Intel BGA 1356 | Intel Socket 1366 |

| Architecture | Kaby Lake | Westmere |

| Codename | Kaby Lake-R | Gulftown |

| Generation | Core i5 (Kaby Lake-U Refresh) | Core i7 Extreme (Gulftown) |

| Process node | 14 nm | 32 nm |

| Transistors | Not recorded | 1,170 million |

| Die size | 123 mm² | 239 mm² |

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

| Memory support | DDR4 | DDR3 |

| Memory bus | Not recorded | Triple-channel |

| PCIe | Not recorded | Gen 2 |

| Integrated graphics | Iris Pro Plus | None |

| Market segment | Mobile | Desktop |

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

| Release date | 2018-04-04 | 2011-02-23 |

| Multiplier unlocked | No | Yes |

| Part number | Not recorded | SLBVZ |

FAQ

Q: Which processor is faster in single-core Cinebench tests?

A: The Intel Core i7-990X wins all three single-core Cinebench tests in the database. In Cinebench R15 single-core, it scores 86 versus 85, a 1.2% advantage. In R20 single-core, it scores 359 versus 358, and in R23 single-core, it scores 857 versus 853.

Q: Does the i5-8269U win any benchmark in the head-to-head comparison?

A: No. The database records six head-to-head Cinebench tests, and the Intel Core i7-990X wins all six. The i5-8269U's closest result is a 609 versus 611 in Cinebench R15 multicore, a 0.3% difference.

Q: How do their average benchmark scores compare?

A: The i5-8269U has an average benchmark score of 1748, while the i7-990X has an average score of 1713. Despite losing every head-to-head test, the i5-8269U has a higher average score, and it also ranks one percentile higher (41st versus 40th).

Q: What are the core and thread counts?

A: The i5-8269U has 4 cores and 8 threads. The i7-990X has 6 cores and 12 threads.

Q: Do both processors have integrated graphics?

A: No. The i5-8269U includes integrated Iris Pro Plus graphics. The i7-990X has no integrated graphics recorded in the database, so it requires a separate graphics card.

Q: Are these processors overclockable?

A: The i7-990X has an unlocked multiplier, so it can be overclocked. The i5-8269U has a locked multiplier and does not support overclocking.