Intel Core i5-1335UE vs Intel Core i5-9600KF Comparison

The Intel Core i5-9600KF and Intel Core i5-1335UE represent two distinct approaches to processing: a desktop-focused, high-power part from the Coffee Lake era versus an efficient mobile processor from Raptor Lake. Benchmark data shows a clear and consistent winner, with the mobile chip outperforming the desktop part across every single tested workload. The i5-1335UE wins all six head-to-head benchmarks, while the i5-9600KF records zero wins. This analysis breaks down the exact margins, the architectural reasons for the results, and what they mean for potential use cases.

Head-to-Head Benchmarks

The performance gap between the two processors is remarkably consistent, hovering around the 10% mark in every Cinebench test. In the Cinebench R15 multicore test, the Intel Core i5-1335UE scores 1013 against 911 for the Intel Core i5-9600KF, a delta of -10.1% from the perspective of the desktop chip. The single-core result in the same test is nearly identical in percentage terms, with the i5-1335UE posting 142 versus 128, a 9.9% advantage.

Moving to Cinebench R20, the pattern holds. The multicore score for the i5-1335UE is 4221, while the i5-9600KF manages 3799, resulting in a 10% deficit for the older chip. Single-core performance in R20 sees the i5-1335UE at 595 and the i5-9600KF at 536, again a 9.9% gap. This consistency suggests that the newer architecture's instruction-level efficiency, rather than raw core count, is the primary driver of the performance advantage.

The most demanding test, Cinebench R23, confirms the trend with the largest absolute margins. The i5-1335UE achieves a multicore score of 10052, exceeding the 9047 of the i5-9600KF by precisely 10%. In the single-core R23 test, the scores are 1419 and 1277 respectively, a 10% lead for the mobile part. Across all six benchmarks, the i5-1335UE's victory margin never deviates far from 10%, indicating a stable and predictable performance edge.

In Geekbench, the only test where both processors have comparable data, the i5-9600KF scores 6184 in multicore and 1595 in single-core. While the i5-1335UE does not have a Geekbench score listed in the fact pack, the Cinebench results provide sufficient evidence to establish the performance hierarchy. The i5-9600KF's average benchmark score across all tests is 2935, placing it in the 52nd percentile of all CPUs. The i5-1335UE's average score is 2907, placing it in the 51st percentile, making the two processors statistically near-identical in aggregate despite the i5-1335UE winning every specific head-to-head test.

Where Each One Wins

The Intel Core i5-1335UE is the clear winner in every benchmark category recorded. It wins all four Cinebench tests (R15, R20, R23) in both single-core and multicore configurations. This means for any workload that relies on CPU rendering, ray tracing, or other Cinebench-style computational tasks, the i5-1335UE is the faster processor. The consistent 10% margin indicates that the advantage is not workload-specific but rather a fundamental architectural superiority in this test suite.

The Intel Core i5-9600KF, however, has no benchmark wins to its name. Its performance profile is strictly inferior in the measured tests. This is a significant finding given that the i5-9600KF has a higher thermal design power (95W versus 15W) and is designed for desktop use with a dedicated socket (Intel Socket 1151), whereas the i5-1335UE is a mobile part soldered to the board (Intel BGA 1744). The data shows that the lower-power, mobile chip outperforms the higher-power desktop chip in every single metric.

In terms of platform capabilities, the i5-9600KF does have a unique advantage: it has an unlocked multiplier, allowing for overclocking. The i5-1335UE has a locked multiplier. However, no overclocking data is present in the fact pack, so any performance gains from that feature remain speculative. The i5-9600KF also supports PCIe Gen 3 with 16 lanes, while the i5-1335UE supports PCIe Gen 4 with 8 lanes, but no benchmark tests for PCIe throughput are provided.

The Verdict

Based strictly on the benchmark data, the Intel Core i5-1335UE is the superior processor. It wins every single test in the head-to-head comparison, with margins between 9.9% and 10.1%. For users prioritizing pure CPU performance in Cinebench-style workloads, the i5-1335UE is the definitive choice. Its higher core count (10 versus 6) and thread count (12 versus 6) contribute to its multicore lead, while its newer Raptor Lake architecture delivers better single-core performance despite a lower boost clock of 4.50 GHz versus 4.60 GHz on the i5-9600KF.

The i5-9600KF should only be considered by users who specifically need a desktop platform with an upgradeable socket (Intel Socket 1151) and an unlocked multiplier for potential overclocking. Its end-of-life production status and lower benchmark scores make it a less attractive option for new builds focused on raw performance. The i5-1335UE, being active in production and a mobile part, is better suited for laptops and compact systems where its 15W TDP is a major advantage.

The aggregate statistics reinforce this conclusion. Although the i5-9600KF has a slightly higher average benchmark score (2935 versus 2907) and a marginally better percentile ranking (52nd versus 51st), this is likely due to the absence of Geekbench scores for the i5-1335UE in the average calculation. In direct comparisons, the i5-1335UE is never slower. For any user choosing between these two processors, the data unambiguously favors the i5-1335UE.

FAQ

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

A: The Intel Core i5-1335UE scores 10052, which is 10% higher than the Intel Core i5-9600KF's score of 9047.

Q: What is the difference in single-core performance between the two chips?

A: The i5-1335UE leads in single-core performance across all tests. In Cinebench R23, it scores 1419 versus 1277 for the i5-9600KF, a 10% advantage.

Q: How many cores and threads does each processor have?

A: The Intel Core i5-9600KF has 6 cores and 6 threads. The Intel Core i5-1335UE has 10 cores and 12 threads.

Q: Is the Intel Core i5-9600KF overclockable?

A: Yes, the i5-9600KF has an unlocked multiplier, which allows for overclocking. The i5-1335UE does not have an unlocked multiplier.

Q: What is the thermal design power (TDP) for each processor?

A: The Intel Core i5-9600KF has a TDP of 95W, while the Intel Core i5-1335UE has a TDP of 15W.

Q: Which processor has a better benchmark performance percentile?

A: The i5-9600KF is in the 52nd percentile of all CPUs, while the i5-1335UE is in the 51st percentile, making them nearly identical in overall standing.

Architecture Differences

The two processors come from different eras and are built on different manufacturing processes. The Intel Core i5-9600KF is based on the Coffee Lake architecture, specifically the Coffee Lake Refresh generation, and is manufactured on Intel's 14 nm process node. The Intel Core i5-1335UE uses the Raptor Lake architecture (Raptor Lake-U) and is built on a 10 nm process node. This process advantage is a key factor in the i5-1335UE's ability to deliver higher performance at a fraction of the power draw.

Core and cache configurations differ significantly. The i5-9600KF has 6 cores and 6 threads with a base clock of 3.70 GHz and a boost clock of 4.60 GHz. The i5-1335UE has 10 cores and 12 threads, but its base clock is listed as 1300.00 MHz (1.30 GHz) and its boost clock is 4.50 GHz. The lower base clock on the i5-1335UE is typical for a low-power mobile part, yet its boost clock is nearly identical to the desktop chip. The i5-1335UE also has larger caches: 80 KB of L1 cache per core versus 64 KB, and 1.25 MB of L2 cache per core versus 256 KB. The shared L3 cache is 12 MB on the i5-1335UE versus 9 MB on the i5-9600KF.

Memory support also differs. The i5-9600KF supports only DDR4 memory with dual-channel access and a memory bandwidth of 42.7 GB/s. The i5-1335UE supports both DDR4 and DDR5 memory, also with dual-channel access, though its memory bandwidth is not listed. Neither processor supports ECC memory. The i5-9600KF has no integrated graphics, while the i5-1335UE includes Iris Xe Graphics 80EU. The i5-9600KF uses a desktop socket (Intel Socket 1151) and PCIe Gen 3 with 16 lanes, whereas the i5-1335UE is a mobile part (Intel BGA 1744) with PCIe Gen 4 and 8 lanes. The i5-9600KF was released in January 2019 and is end-of-life, while the i5-1335UE was released in January 2023 and is still active in production.