Intel Core i7-10700K vs Intel Core Ultra 5 135U Comparison

The Intel Core Ultra 5 135U and Intel Core i7-10700K represent two distinct philosophies in processor design: one is a modern, power-sipping mobile chip built for efficiency, while the other is a high-power desktop part from an older generation. The benchmark data reveals a clear split: the Core i7-10700K dominates sustained multi-core workloads, while the Core Ultra 5 135U counters with superior single-threaded performance and specific efficiency-oriented tasks. The Core i7-10700K wins 10 of the 17 head-to-head benchmarks, but the Core Ultra 5 135U takes the other 7, including some with massive margins.

The Verdict

The data paints two very different portraits. For users who need maximum raw compute in multi-threaded applications—think video rendering, complex simulation, or heavy compilation—the Intel Core i7-10700K is the definitive choice. Its Cinebench R23 multicore score of 15,727 is a massive 40.8% higher than the Core Ultra 5 135U’s 9,315, a gap that cannot be overcome by any other metric. The Core i7-10700K’s average benchmark score of 22,230 places it in the 75th percentile of all CPUs, and while the Core Ultra 5 135U sits slightly higher in percentile (76th) with an average score of 22,618, the absolute performance ceiling is far higher on the desktop chip.

Conversely, the Intel Core Ultra 5 135U is the processor for efficiency-focused mobile systems. Its 15W TDP, compared to the Core i7-10700K’s 125W TDP, makes it suitable for thin-and-light laptops where battery life and thermals are paramount. The data shows it is not a slouch either: it wins the Passmark single-thread test with a score of 3,343, which is 9.9% higher than the Core i7-10700K’s 3,043. It also wins the Passmark physics test by 20.3% (1,122 vs 933) and the data encryption test by an enormous 88.5% (12,195 vs 6,468). The Core Ultra 5 135U is the right pick for a portable system where responsiveness in everyday tasks and cryptography are more important than sustained multi-core rendering.

Architecture Differences

The two processors are built on fundamentally different architectures and process nodes. The Intel Core Ultra 5 135U uses the Meteor Lake architecture, manufactured on Intel’s 7nm process node. It is a 12-core, 14-thread part with a base clock of 1.60 GHz and a boost clock of 4.40 GHz. It features a hybrid cache layout with 112 KB of L1 per core, 2 MB of L2 per core, and 12 MB of shared L3 cache. It supports DDR5 memory with a bandwidth of 89.6 GB/s and uses the Intel BGA 2049 socket, marking it as a mobile-only part.

The Intel Core i7-10700K is based on the older Comet Lake architecture, built on Intel’s 14nm process node. It is an 8-core, 16-thread desktop processor with a base clock of 3.80 GHz and a boost clock of 5.10 GHz. Its cache configuration is different, with 64 KB of L1 per core, 256 KB of L2 per core, and a larger 16 MB of shared L3 cache. It uses DDR4 memory with a bandwidth of 46.9 GB/s and fits the Intel Socket 1200. The Core i7-10700K has an unlocked multiplier, whereas the Core Ultra 5 135U does not. The integrated graphics also differ, with the Core Ultra 5 135U featuring Arc Xe-LPG 64EU, while the Core i7-10700K has the older UHD Graphics 630.

FAQ

Q: Which processor has a higher single-thread performance?

A: The Intel Core Ultra 5 135U has higher single-thread performance. It scores 3,343 in the Passmark single-thread test, which is 9.9% higher than the Intel Core i7-10700K’s score of 3,043. It also wins the Cinebench R15 single-core test by 2.2% (228 vs 223).

Q: Is the Intel Core i7-10700K better for multi-threaded workloads?

A: Yes, significantly so. The Core i7-10700K wins the Cinebench R23 multicore test with a score of 15,727, which is 40.8% higher than the Core Ultra 5 135U’s score of 9,315. It also wins the Cinebench R20 multicore test by 10.2% (6,605 vs 5,934).

Q: What is the TDP difference between the two?

A: The Intel Core Ultra 5 135U has a TDP of 15W, while the Intel Core i7-10700K has a TDP of 125W. This reflects the Core Ultra 5 135U’s mobile focus and the Core i7-10700K’s desktop, high-power design.

Q: Which processor has a larger L3 cache?

A: The Intel Core i7-10700K has a larger L3 cache at 16 MB shared, compared to the Intel Core Ultra 5 135U’s 12 MB shared. However, the Core Ultra 5 135U has larger L1 and L2 caches per core (112 KB and 2 MB, respectively) versus the Core i7-10700K (64 KB and 256 KB, respectively).

Q: How do they compare in data encryption performance?

A: The Intel Core Ultra 5 135U is dramatically faster in data encryption. It scores 12,195 in the Passmark data encryption test, which is 88.5% higher than the Core i7-10700K’s score of 6,468. The Core i7-10700K wins in data compression by 33.4% (295,418 vs 196,712).

Q: Which processor supports faster memory?

A: The Intel Core Ultra 5 135U supports DDR5 memory with a bandwidth of 89.6 GB/s, while the Intel Core i7-10700K supports DDR4 with a bandwidth of 46.9 GB/s. The Core Ultra 5 135U's memory bandwidth is nearly double that of the Core i7-10700K.

Specification Differences

The two CPUs differ in nearly every core specification. The Intel Core Ultra 5 135U has 12 cores and 14 threads, while the Intel Core i7-10700K has 8 cores and 16 threads. The Core Ultra 5 135U has a lower base clock (1.60 GHz vs 3.80 GHz) and a lower boost clock (4.40 GHz vs 5.10 GHz). The TDP is drastically different, with the Core Ultra 5 135U at 15W and the Core i7-10700K at 125W. The sockets are incompatible: Intel BGA 2049 for the Core Ultra 5 135U versus Intel Socket 1200 for the Core i7-10700K. The process node differs (7 nm vs 14 nm), and the architecture is Meteor Lake versus Comet Lake. The cache hierarchy is different, with the Core Ultra 5 135U having a smaller L3 (12 MB vs 16 MB) but larger per-core L1 and L2. Memory support differs (DDR5 vs DDR4), as does PCIe generation (Gen 4 with 12 lanes vs Gen 3 with 16 lanes). The integrated graphics are different (Arc Xe-LPG 64EU vs UHD Graphics 630), and the Core i7-10700K has an unlocked multiplier while the Core Ultra 5 135U does not. The Core Ultra 5 135U has a launch MSRP of $332.

Head-to-Head Benchmarks

The benchmark results show a clear division of labor. The Intel Core i7-10700K dominates the Cinebench suite, with the most significant victory being a 40.8% lead in Cinebench R23 multicore (15,727 vs 9,315). It also leads by 10.2% in Cinebench R20 multicore (6,605 vs 5,934) and by 29.6% in Cinebench R23 single-core (2,220 vs 1,563). The Core i7-10700K also wins the Cinebench R20 single-core test by 10.2% (932 vs 837). In the Passmark suite, the Core i7-10700K secures wins in data compression (295,418 vs 196,712, a 33.4% lead), extended instructions (19,387 vs 11,144, a 42.5% lead), integer math (66,642 vs 56,864, a 14.7% lead), multithread (18,609 vs 17,359, a 6.7% lead), and random string sorting (36,633 vs 21,620, a 41% lead). Its win in floating point math is negligible, at only 0.2% (41,306 vs 41,232).

The Intel Core Ultra 5 135U counters with notable wins. Its most striking victory is in data encryption, where it scores 12,195 versus the Core i7-10700K’s 6,468, an 88.5% advantage. It also wins the Passmark physics test by 20.3% (1,122 vs 933) and the Passmark find prime numbers test by 16.4% (64 vs 55). In single-threaded performance, the Core Ultra 5 135U wins the Passmark single-thread test by 9.9% (3,343 vs 3,043) and the Cinebench R15 single-core test by 2.2% (228 vs 223). It also wins the Cinebench R15 multicore test by 3.1% (1,634 vs 1,585). Overall, the data shows the Core i7-10700K winning 10 benchmarks to the Core Ultra 5 135U’s 7, but the Core Ultra 5 135U’s wins are often by larger margins in specific, modern workloads.