Intel Core 3 305 vs Intel Core Ultra 5 135UL Comparison

Head-to-Head Benchmarks

The database contains a full benchmark suite for the Intel Core 3 305, while the Intel Core Ultra 5 135UL has no recorded benchmark scores. This asymmetry defines the comparison: the Core 3 305 delivers measurable performance data across Cinebench and Passmark tests, whereas the Core Ultra 5 135UL appears with an average benchmark score of zero and no rival comparisons. The Core 3 305 achieves an average benchmark score of 18,302 and sits in the 72nd percentile among all CPUs, a strong position for a low-power mobile part.

Cinebench results for the Core 3 305 show a clear split between single-core and multi-core capability. In Cinebench R15, the chip scores 1,322 points multi-core and 186 points single-core. Moving to R20, the multi-core score jumps to 5,511 while single-core reaches 777. In R23, the Core 3 305 delivers 13,123 points multi-core and 1,852 points single-core. These numbers indicate the processor scales well under sustained multi-threaded loads, with the R23 multi-core figure representing roughly seven times the single-core result.

Passmark tests reinforce the multi-core strength. The multithread score stands at 15,439, while single-thread performance registers 3,977. Integer math scores 32,295, floating point math reaches 42,284, and extended instructions hit 13,543. Data compression produces 146,857 points, data encryption 11,019, random string sorting 17,623, and find prime numbers only 115. Physics tests yield 1,233 points. The compression and encryption numbers suggest strong throughput for data-heavy workloads, while the low prime number score indicates modest integer iteration performance.

The nearest rivals for the Core 3 305 provide context. The Intel Core i3-14100 averages 18,318 points, a 0.1% advantage over the Core 3 305. The Intel Core 5 330 averages 18,345 points, 0.2% ahead. The Intel Core 7 360 averages 18,374 points, 0.4% ahead. The AMD Ryzen 5 2600E averages 18,230 points, 0.4% behind the Core 3 305. These deltas are tiny, placing the Core 3 305 in a tightly clustered performance band where no rival holds a meaningful lead.

With no benchmark data for the Core Ultra 5 135UL, the head-to-head comparison cannot show direct score differences. The Core 3 305 stands as the only scored part, and its percentile ranking of 72 indicates it outperforms a majority of all CPUs in the database. The Core Ultra 5 135UL, by contrast, has a percentile rank of 50, which in the absence of scores reflects its position as a mid-tier entry rather than a measured result.

Where Each One Wins

The Core 3 305 wins in every measurable category because it is the only part with recorded scores. Its Cinebench R23 multi-core score of 13,123 demonstrates capability for rendering and compilation workloads, while the single-core score of 1,852 supports responsive everyday tasks. Passmark data compression at 146,857 points indicates efficient handling of archive operations, and floating point math at 42,284 points suits scientific and engineering calculations.

The Core Ultra 5 135UL wins in structural specifications. It offers 12 cores and 14 threads versus 6 cores and 6 threads on the Core 3 305, providing more parallel execution capacity on paper. Its dual-channel memory bus delivers a theoretical bandwidth of 89.6 GB/s compared to the Core 3 305's single-channel 59.7 GB/s, a 50% advantage in memory throughput. The Core Ultra 5 135UL also carries 12 MB of shared L3 cache versus 6 MB, and its integrated Arc Xe-LPG 64EU graphics likely outperform the Core 3 305's Intel Xe3 Graphics with 1 Xe core, though no graphics benchmarks exist in the record.

For single-threaded responsiveness, the Core 3 305's boost clock of 4.30 GHz versus 4.40 GHz on the Core Ultra 5 135UL shows a slight edge for the latter, but the Core 3 305's smaller core count means each core receives a larger share of the 15 W thermal envelope. The Core 3 305's 3 nm process node versus 7 nm on the Core Ultra 5 135UL suggests higher transistor density and potentially better power efficiency per operation, though efficiency numbers are not recorded.

The Core Ultra 5 135UL targets desktop use with an Intel Socket 1851, while the Core 3 305 uses Intel BGA 1516 for mobile applications. This distinction matters for system builders: the Core Ultra 5 135UL can be paired with a motherboard that determines DDR5 memory support, whereas the Core 3 305 is soldered and fixed with DDR5 and LPDDR5X support. The Core Ultra 5 135UL also provides 8 PCIe Gen 4 lanes versus 6 on the Core 3 305, offering more expansion bandwidth for discrete components.

Architecture Differences

The two processors come from different Intel generations and designs. The Core 3 305 uses the Wildcat Lake codename with a 3 nm process node, fabricated by Intel. It has 6 cores and 6 threads, indicating no hyperthreading. Cache totals include 192 KB of L1, 2.5 MB of L2, and 6 MB of shared L3. The memory bus is single-channel with 59.7 GB/s bandwidth, and PCIe support is Gen 4 with 6 CPU lanes. The integrated graphics are Intel Xe3 Graphics with 1 Xe core. This part uses the Intel BGA 1516 socket and is classified as a mobile processor.

The Core Ultra 5 135UL uses the Meteor Lake architecture with the Meteor Lake-PS codename, on a 7 nm process node also fabricated by Intel. It has 12 cores and 14 threads, meaning 2 of the cores support hyperthreading or a hybrid configuration. Cache is organized per core: 112 KB L1 per core and 2 MB L2 per core, with 12 MB of shared L3. The memory bus is dual-channel with 89.6 GB/s bandwidth, and PCIe is Gen 4 with 8 CPU lanes. The integrated graphics are Arc Xe-LPG with 64 execution units. This part uses Intel Socket 1851 and is classified as a desktop processor.

Process node differences are significant. The 3 nm node on the Core 3 305 represents a newer manufacturing technology than the 7 nm node on the Core Ultra 5 135UL, which typically allows for smaller transistors and higher efficiency. The Core 3 305's release date of April 2026 is roughly two years after the Core Ultra 5 135UL's April 2024 release, reflecting the generational gap. The Core 3 305 belongs to the Core 3 generation while the Core Ultra 5 135UL belongs to the Core Ultra Series 1 generation.

Memory support differs in flexibility. The Core 3 305 supports DDR5 and LPDDR5X directly, while the Core Ultra 5 135UL supports DDR5 but notes that support depends on the motherboard. This means the Core Ultra 5 135UL's memory capabilities are board-dependent, whereas the Core 3 305's memory controller includes both standard and low-power variants. Neither part supports ECC memory.

Thread counts reveal different design philosophies. The Core 3 305 offers one thread per core, which is straightforward and efficient for power-constrained mobile use. The Core Ultra 5 135UL offers 14 threads across 12 cores, suggesting a mix of performance and efficiency cores where two cores provide additional threads. This hybrid approach is common in Intel's newer architectures, though the exact core layout is not specified in the data.

The Verdict

The benchmark data clearly favors the Intel Core 3 305 for any user who requires measured performance. Its average benchmark score of 18,302 places it in the 72nd percentile, and its nearest rivals are all within 0.4% of its score, indicating that it competes effectively with established desktop and mobile parts. The Cinebench R23 multi-core score of 13,123 and Passmark multithread score of 15,439 confirm that this small 6-core chip delivers substantial throughput.

The Intel Core Ultra 5 135UL cannot be evaluated on performance because the database contains no scores for it. Its specifications suggest raw capability: more cores, more threads, more cache, wider memory bandwidth, and newer integrated graphics. However, without benchmark data, any performance claim remains speculative. The Core Ultra 5 135UL's 50th percentile ranking, while not tied to a measured score, positions it as an average performer in the database's distribution.

For mobile deployments where power consumption is fixed at 15 W for both parts, the Core 3 305 offers proven performance with a smaller physical footprint (BGA socket) and a newer process node. The Core Ultra 5 135UL, with its desktop socket and 12 cores, may appeal to users who need more parallel cores and higher memory bandwidth, but the absence of benchmark scores leaves this as an unverified advantage. The data supports choosing the Core 3 305 when measured performance is the priority, and the Core Ultra 5 135UL only when its structural features (more cores, dual-channel memory, more PCIe lanes) outweigh the lack of recorded results.

FAQ

Q: How does the Intel Core 3 305 compare to its nearest rival, the Intel Core i3-14100?

A: The Core 3 305 averages 18,302 points in the database, while the Core i3-14100 averages 18,318 points. The delta is 0.1%, meaning the Core i3-14100 holds a negligible lead of 16 points.

Q: What is the Core 3 305's single-thread performance?

A: The Core 3 305 scores 1852 in Cinebench R23 single-core, 777 in Cinebench R20 single-core, and 186 in Cinebench R15 single-core. Passmark single-thread tests score 3977.

Q: Does the Core Ultra 5 135UL have any benchmark scores in the database?

A: No. The Core Ultra 5 135UL has an empty benchmarks array and an average benchmark score of zero. It also has no nearest rivals listed.

Q: What are the memory bandwidth differences between the two CPUs?

A: The Core 3 305 uses a single-channel memory bus with 59.7 GB/s bandwidth. The Core Ultra 5 135UL uses a dual-channel bus with 89.6 GB/s bandwidth, which is 29.9 GB/s higher.

Q: Which processor has more cache?

A: The Core Ultra 5 135UL has 12 MB of shared L3 cache, double the Core 3 305's 6 MB. The Core Ultra 5 135UL also has per-core L1 and L2 cache, while the Core 3 305 has fixed totals of 192 KB L1 and 2.5 MB L2.

Q: What are the launch MSRPs for these processors?

A: The Intel Core 3 305 has a launch MSRP of $309, and the Intel Core Ultra 5 135UL has a launch MSRP of $331.