Intel Core 3 100U vs Intel Core Ultra 7 270HX Plus Comparison

Intel Core 3 100U and Intel Core Ultra 7 270HX Plus represent two very different interpretations of the mobile processor. The Core 3 100U is a 6-core, 8-thread Raptor Lake-U part built on Intel's 10 nm process, with a 1.20 GHz base clock and 4.70 GHz boost clock, a 15 W TDP, and 10 MB of shared L3 cache. The Core Ultra 7 270HX Plus is a 20-core, 20-thread Arrow Lake-HX Refresh part built on TSMC's 3 nm process, with a 2.40 GHz base clock and 5.30 GHz boost clock, a 55 W TDP, and 30 MB of shared L3 cache. The benchmark data records a complete sweep: the Core Ultra 7 270HX Plus wins all 17 head-to-head tests, with an average benchmark score of 61834 versus 16148 for the Core 3 100U.

Where Each One Wins

The recorded data shows no benchmark victories for the Intel Core 3 100U across any of the 17 head-to-head tests. The Core Ultra 7 270HX Plus delivers a clean sweep, but the margin varies significantly by workload type, which reveals where each processor's strengths lie relative to its own architecture.

The Core 3 100U's closest performance gap appears in single-threaded PassMark tests. In PassMark single thread, the Core Ultra 7 270HX Plus scores 4764 against 3506 for the Core 3 100U, a 26.4% advantage. This is the smallest relative difference in the entire dataset, indicating that the Core 3 100U's single-core efficiency, built on Raptor Lake cores, narrows the gap somewhat when only one thread is active. The Core 3 100U also holds a 70th percentile ranking among all CPUs, while the Core Ultra 7 270HX Plus sits at the 93rd percentile, so both parts are above the midpoint of the database, but they occupy very different performance tiers.

The Core Ultra 7 270HX Plus shows its largest lead in PassMark find prime numbers, where it scores 482 versus 52 for the Core 3 100U, a 89.2% delta. This workload is highly sensitive to core count and memory bandwidth, and the 20-core part with 102.4 GB/s memory bandwidth simply overwhelms the 6-core part. The Core Ultra 7 270HX Plus also shows a dominant 82.7% lead in floating point math (163567 versus 28322) and a 79.9% lead in extended instructions (39283 versus 7894), both of which scale strongly with wider execution resources.

For multi-threaded workloads, the pattern is consistent. The Core Ultra 7 270HX Plus leads Cinebench R23 multi-core by 74.7% (41913 versus 10624), Cinebench R20 multi-core by 74.7% (17603 versus 4462), and Cinebench R15 multi-core by 74.7% (4224 versus 1070). The PassMark multithread test shows a 74.1% lead (48270 versus 12522). These figures indicate that the Core Ultra 7 270HX Plus delivers roughly four times the multi-threaded throughput of the Core 3 100U, a consistent scaling factor across different Cinebench versions.

Architecture Differences

The two processors come from different foundries and process nodes. The Core 3 100U uses Intel's 10 nm process and Raptor Lake architecture, with a codename of Raptor Lake-U and a generation label of Core 3 (Raptor Lake-U). The Core Ultra 7 270HX Plus uses TSMC's 3 nm process and Arrow Lake-HX Refresh architecture, with a codename of Arrow Lake-HX Refresh and a generation label of Ultra 7 (Arrow Lake-HX). The Core Ultra 7 270HX Plus also carries a transistor count of 17,800 million and a die size of 243 mm², while the Core 3 100U has no recorded transistor or die size data.

Core and thread counts differ substantially. The Core 3 100U has 6 cores and 8 threads, while the Core Ultra 7 270HX Plus has 20 cores and 20 threads. The Core Ultra 7 270HX Plus does not use simultaneous multithreading, matching its thread count to its core count, while the Core 3 100U enables two threads per core on some of its cores. Cache hierarchies also diverge. The Core 3 100U has 80 KB of L1 per core, 1.25 MB of L2 per core, and 10 MB of shared L3. The Core Ultra 7 270HX Plus has 192 KB of L1 per core, 3 MB of L2 per core, and 30 MB of shared L3. The larger per-core caches on the Core Ultra 7 270HX Plus support its higher clock speeds and wider execution.

Memory support differs as well. The Core 3 100U supports DDR4 and DDR5 memory on a dual-channel bus, while the Core Ultra 7 270HX Plus supports only DDR5 on a dual-channel bus. The Core Ultra 7 270HX Plus records a memory bandwidth of 102.4 GB/s, while the Core 3 100U has no recorded bandwidth figure. PCIe connectivity also differs: the Core 3 100U uses Gen 4 with 8 lanes (CPU only), while the Core Ultra 7 270HX Plus uses Gen 5 with 20 lanes (CPU only). The Core Ultra 7 270HX Plus also has an unlocked multiplier, while the Core 3 100U does not.

Integrated graphics differ in branding but share the same execution unit count. The Core 3 100U uses UHD Graphics 64EU, while the Core Ultra 7 270HX Plus uses Arc Xe-LPG Graphics 64EU. Both are 64 EU designs, though the underlying architectures are from different generations. The sockets are also different: the Core 3 100U uses Intel BGA 1744, while the Core Ultra 7 270HX Plus uses Intel BGA 2114. The Core Ultra 7 270HX Plus has a 55 W TDP, while the Core 3 100U has a 15 W TDP, reflecting their different performance targets. The Core 3 100U was released on 2024-01-07, while the Core Ultra 7 270HX Plus was released on 2026-03-16. The Core 3 100U has a launch MSRP of $426, while the Core Ultra 7 270HX Plus has no recorded launch MSRP.

The Verdict

The benchmark data is unambiguous. The Intel Core Ultra 7 270HX Plus outperforms the Intel Core 3 100U in every recorded test, with the smallest margin being a 26.4% lead in single-threaded PassMark and the largest being an 89.2% lead in prime number finding. The Core Ultra 7 270HX Plus sits at the 93rd percentile among all CPUs, a position that places it near the top of the database, while the Core 3 100U sits at the 70th percentile.

The Core 3 100U's nearest rivals in the database, based on average benchmark score, are the Intel Core i7-10850H at 16204 (0.3% ahead), the Intel Core i5-10600KF at 16228 (0.5% ahead), the Intel Core i7-1260U at 16320 (1.1% ahead), and the AMD Ryzen 5 4600H at 16341 (1.2% ahead). This places the Core 3 100U in a competitive bracket with older mid-range desktop and mobile parts, but its 15 W TDP suggests it targets power-constrained systems.

The Core Ultra 7 270HX Plus's nearest rivals are the Intel Core i9-13900KF at 61841 (0.0% delta), the Intel Core i9-13900K at 61766 (0.1% ahead), the Intel Core i9-13900T at 61723 (0.2% ahead), and the Intel Xeon 636 at 61360 (0.8% behind). This positions the Core Ultra 7 270HX Plus in the same performance class as flagship desktop processors from the previous generation, a remarkable result for a mobile part with a 55 W TDP.

For workloads that demand maximum multi-threaded throughput, such as Cinebench R23 multi-core rendering, the Core Ultra 7 270HX Plus delivers 41913 points versus 10624 for the Core 3 100U, a 74.7% advantage. For single-threaded responsiveness, the Core Ultra 7 270HX Plus leads by 74.7% in Cinebench R23 single-core (5917 versus 1499). The only test where the Core 3 100U comes within a single-digit percentage gap is PassMark single thread, where the Core Ultra 7 270HX Plus leads by 26.4%. Even there, the Core 3 100U cannot secure a win. The data shows no scenario where the Core 3 100U is the better choice, given a system that can accommodate the Core Ultra 7 270HX Plus's higher 55 W TDP and larger 243 mm² die.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 7 270HX Plus has 20 cores and 20 threads, while the Intel Core 3 100U has 6 cores and 8 threads.

Q: What is the single-thread performance difference?

A: In Cinebench R23 single-core, the Core Ultra 7 270HX Plus scores 5917 versus 1499 for the Core 3 100U, a 74.7% lead. In PassMark single thread, the Core Ultra 7 270HX Plus scores 4764 versus 3506, a 26.4% lead.

Q: How do the cache sizes compare?

A: The Core 3 100U has 80 KB of L1 per core, 1.25 MB of L2 per core, and 10 MB of shared L3. The Core Ultra 7 270HX Plus has 192 KB of L1 per core, 3 MB of L2 per core, and 30 MB of shared L3.

Q: What process nodes are used?

A: The Core 3 100U uses Intel's 10 nm process. The Core Ultra 7 270HX Plus uses TSMC's 3 nm process.

Q: Which processor has higher memory bandwidth?

A: The Core Ultra 7 270HX Plus records a memory bandwidth of 102.4 GB/s, while the Core 3 100U has no recorded memory bandwidth figure. The Core 3 100U supports DDR4 and DDR5, while the Core Ultra 7 270HX Plus supports only DDR5.

Q: How many benchmark wins does each processor have?

A: The Core Ultra 7 270HX Plus wins all 17 head-to-head benchmark tests. The Core 3 100U has 0 wins.

Head-to-Head Benchmarks

The largest single test margin in the dataset is PassMark find prime numbers, where the Core Ultra 7 270HX Plus scores 482 against 52 for the Core 3 100U, a 89.2% delta. This test is particularly sensitive to the combination of core count, cache size, and memory bandwidth, and the Core Ultra 7 270HX Plus's 20 cores, 30 MB L3, and 102.4 GB/s bandwidth produce an overwhelming advantage.

The second largest margin is PassMark floating point math, where the Core Ultra 7 270HX Plus scores 163567 versus 28322 for the Core 3 100U, an 82.7% delta. The Core Ultra 7 270HX Plus also leads PassMark extended instructions by 79.9% (39283 versus 7894) and PassMark data encryption by 78.5% (37813 versus 8128). These results show that the Core Ultra 7 270HX Plus's wider execution resources and newer architecture translate into large advantages in math-intensive and encryption workloads.

PassMark physics shows a 77.2% lead for the Core Ultra 7 270HX Plus (3843 versus 876). The Cinebench suite shows consistent 74.7% leads for the Core Ultra 7 270HX Plus across R15, R20, and R23, in both single-core and multi-core tests. Cinebench R23 multi-core is the most dramatic: 41913 versus 10624. PassMark multithread shows a 74.1% lead (48270 versus 12522), and PassMark random string sorting shows a 74.7% lead (60020 versus 15191). PassMark data compression shows a 72.3% lead (493179 versus 136497), and PassMark integer math shows a 67.7% lead (122449 versus 39580).

The smallest margin is PassMark single thread, where the Core Ultra 7 270HX Plus leads by 26.4% (4764 versus 3506). This test also appears twice in the dataset under the names passmark_single_thread and passmark_singlethread, both with identical scores. Even in this closest test, the Core 3 100U's higher boost clock of 4.70 GHz cannot overcome the Core Ultra 7 270HX Plus's 5.30 GHz boost clock and newer core design.

The average benchmark score difference is substantial: the Core Ultra 7 270HX Plus averages 61834, while the Core 3 100U averages 16148. This places the Core Ultra 7 270HX Plus in the 93rd percentile of all CPUs, while the Core 3 100U sits at the 70th percentile. The nearest rivals for the Core Ultra 7 270HX Plus include the Core i9-13900KF at 61841 and the Core i9-13900K at 61766, confirming that it performs at flagship desktop level. The nearest rivals for the Core 3 100U include the Core i7-10850H at 16204 and the Core i5-10600KF at 16228, showing that the Core 3 100U performs in line with older mid-range desktop parts despite its mobile 15 W TDP.