Intel Core 3 100U vs Intel Core 3 305 Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core 3 305 records a higher average benchmark score of 18302, while the Intel Core 3 100U scores 16148. The 305 sits at the 72nd percentile of all CPUs, while the 100U sits at the 70th percentile.

Q: How do the two compare in Cinebench R23 multi-core performance?

A: The Core 3 305 scores 13123 in Cinebench R23 multi-core, which is 19% ahead of the Core 3 100U's 10624. This is the largest multi-core gap between the two across any Cinebench version.

Q: Is there any benchmark where the Core 3 100U wins?

A: Yes, in PassMark integer math, the Core 3 100U scores 39580 against 32295 for the Core 3 305, a 22.6% advantage. This is the only head-to-head test out of 17 where the 100U comes out ahead.

Q: How far apart are the two in single-thread performance?

A: The Core 3 305 leads by 11.8% in PassMark single-thread (3977 vs 3506) and by 19.4% in Cinebench R15 single-core (186 vs 150). The gap is consistent across all three Cinebench single-core tests at roughly 19%.

Q: Which processor uses the newer manufacturing process?

A: The Core 3 305 is built on a 3 nm process node, while the Core 3 100U uses a 10 nm node. Both are produced by Intel.

Q: What is the difference in memory bandwidth support?

A: The Core 3 305 supports single-channel memory with a bandwidth of 59.7 GB/s. The Core 3 100U supports dual-channel memory, but the database does not record a bandwidth figure for it.

Architecture Differences

The two processors come from different design lineages. The Intel Core 3 100U uses the Raptor Lake architecture with the Raptor Lake-U codename, built on Intel's 10 nm process. The Intel Core 3 305 uses the Wildcat Lake codename on a 3 nm process node. Both are mobile parts with a 15 W TDP, but their internal layouts diverge sharply.

Core counts are identical at 6 physical cores, yet threading differs. The 100U supports 8 threads, meaning it uses Hyper-Threading on some cores. The 305 supports 6 threads, one per core, with no multi-threading overhead. This creates an interesting dynamic: the older part has more logical threads, while the newer part relies on higher per-core efficiency.

Clock speeds also differ. The 100U has a base clock of 1.20 GHz and a boost clock of 4.70 GHz. The 305 has a higher base clock of 1.50 GHz but a lower boost clock of 4.30 GHz. The data suggests the 305 trades peak frequency for a stronger sustained baseline.

Cache configurations are not directly comparable. The 100U lists L1 as 80 KB per core, L2 as 1.25 MB per core, and L3 as 10 MB shared. The 305 lists L1 as 192 KB, L2 as 2.5 MB, and L3 as 6 MB shared, with no per-core breakdown. The 100U therefore has more total L3, while the 305 has larger per-core L1 and L2 allocations.

Memory support is a major split. The 100U supports DDR4 and DDR5 over a dual-channel bus. The 305 supports DDR5 and LPDDR5X over a single-channel bus, with a recorded bandwidth of 59.7 GB/s. The 305 drops DDR4 compatibility entirely.

PCIe connectivity also differs. The 100U provides Gen 4 with 8 CPU lanes, while the 305 provides Gen 4 with 6 CPU lanes. The integrated graphics differ as well: the 100U uses UHD Graphics 64EU, while the 305 uses Intel Xe3 Graphics with 1 Xe core.

Sockets are not interchangeable. The 100U uses Intel BGA 1744, and the 305 uses Intel BGA 1516. The 305 also has a later release date in the database, arriving in April 2026 versus January 2024 for the 100U. The launch MSRP for the 100U is $426, and the launch MSRP for the 305 is $309.

Head-to-Head Benchmarks

The head-to-head dataset contains 17 benchmark comparisons. The Intel Core 3 305 wins 16 of them. The Intel Core 3 100U wins one. The scale of the 305's victories varies widely, from a narrow 7.1% margin to a dominant 54.8% margin.

The most lopsided result is PassMark find prime numbers. The 305 scores 115, the 100U scores 52, giving the 305 a 54.8% lead. This test rewards the 305's per-core efficiency heavily. Extended instructions show a similar trend: the 305 scores 13543 versus 7894, a 41.7% gap. Floating point math also favors the 305 by 33%, with scores of 42284 and 28322 respectively.

Cinebench results cluster tightly around 19%. In R15 multi-core, the 305 leads 1322 to 1070, a 19.1% gap. R15 single-core shows 186 versus 150, a 19.4% gap. R20 multi-core shows 5511 versus 4462, a 19% gap. R20 single-core shows 777 versus 629, also 19%. R23 multi-core shows 13123 versus 10624, and R23 single-core shows 1852 versus 1499, both at 19% or 19.1%. The consistency across Cinebench versions indicates a stable performance ratio rather than a workload-specific anomaly.

PassMark multi-thread shows the 305 ahead by 18.9%, scoring 15439 against 12522. Physics follows at 29% (1233 vs 876). Data encryption shows a 26.2% lead for the 305 (11019 vs 8128). Random string sorting shows a 13.8% lead (17623 vs 15191). Data compression is the closest contest among the 305's wins at 7.1% (146857 vs 136497). Single-thread tests show an 11.8% lead (3977 vs 3506).

The sole win for the 100U is PassMark integer math. The 100U scores 39580, the 305 scores 32295, and the 100U leads by 22.6%. This is a notable outlier given the 305's dominance elsewhere. Data encryption, extended instructions, and floating point all go to the 305 by large margins, but integer math goes the other way. The result suggests the 100U's older architecture retains a specific strength in integer-heavy workloads, even as it loses ground in nearly every other category.

The average benchmark scores confirm the overall picture. The 305's average of 18302 puts it within 0.1% of the Intel Core i3-14100 and 0.2% of the Intel Core 5 330. The 100U's average of 16148 places it 0.3% behind the Intel Core i7-10850H and 1.2% behind the AMD Ryzen 5 4600H. The 305 competes with a higher tier of rivals, while the 100U holds its own against older desktop and mobile parts.

Specification Differences

The two processors differ in several key specification fields. The 100U has 8 threads, the 305 has 6. The 100U has a base clock of 1.20 GHz, the 305 has 1.50 GHz. The 100U has a boost clock of 4.70 GHz, the 305 has 4.30 GHz. The 100U uses Intel BGA 1744, the 305 uses Intel BGA 1516. The 100U uses Raptor Lake on a 10 nm node, the 305 uses Wildcat Lake on a 3 nm node.

Cache differs across all levels. The 100U lists L1 as 80 KB per core, L2 as 1.25 MB per core, and L3 as 10 MB shared. The 305 lists L1 as 192 KB, L2 as 2.5 MB, and L3 as 6 MB shared. Memory support differs: the 100U supports DDR4 and DDR5 dual-channel, the 305 supports DDR5 and LPDDR5X single-channel with a bandwidth of 59.7 GB/s. PCIe differs: 8 Gen 4 lanes for the 100U, 6 Gen 4 lanes for the 305. Integrated graphics differ: UHD Graphics 64EU versus Intel Xe3 Graphics (1 Xe). Release dates differ: January 2024 versus April 2026. Launch MSRP differs: $426 versus $309.

Fields that are the same: both have 6 cores, 15 W TDP, Intel as manufacturer, a mobile market segment, active production status, non-ECC memory, and a locked multiplier.

The Verdict

The benchmark data points to a clear overall winner. The Intel Core 3 305 wins 16 of 17 head-to-head tests, has a higher average benchmark score, and sits at a higher percentile of all CPUs. Its wins are not marginal. The 305 leads by double digits in most tests and by more than 50% in prime number finding. The 100U's single win in integer math, while substantial at 22.6%, does not offset the breadth of the 305's advantages.

The 305 also reaches this position while supporting fewer threads and a lower boost clock. This indicates that its 3 nm node and Wildcat Lake design deliver more work per clock and per thread than the Raptor Lake part. The higher base clock of 1.50 GHz versus 1.20 GHz may also contribute to sustained performance.

The 100U does retain structural advantages. It has more L3 cache, dual-channel memory support, and more PCIe lanes. It also supports DDR4, which may matter for platform compatibility. But none of these advantages translate into benchmark wins in the recorded data, apart from integer math.

For buyers deciding between the two on raw performance, the 305 is the stronger choice in almost every measured workload. For those who need dual-channel memory bandwidth, DDR4 support, or additional PCIe lanes, the 100U offers features the 305 lacks. Neither processor has an unlocked multiplier, and both are locked into their respective BGA sockets, so platform choice will likely dictate which is available.

Where Each One Wins

The Intel Core 3 305 wins in rendering, physics simulation, encryption, floating point math, extended instructions, compression, sorting, and single-thread performance. Its largest margins come in prime number finding (54.8% ahead), extended instructions (41.7% ahead), and floating point math (33% ahead). These results suggest the 305 is the better option for compute-heavy tasks that rely on per-core throughput and modern instruction execution.

The Intel Core 3 305 also wins every Cinebench test by approximately 19%, covering both single-core and multi-core rendering workloads. This consistency makes it the safer pick for productivity applications that scale with both frequency and core efficiency.

The Intel Core 3 100U wins in exactly one category: PassMark integer math, where it scores 39580 against 32295, a 22.6% lead. This is a meaningful result for workloads that are integer-bound and do not benefit from the 305's floating point or instruction-set advantages. The 100U also offers dual-channel memory, DDR4 support, 8 PCIe lanes, and a larger shared L3 cache, which may provide platform-level benefits that do not appear in the recorded benchmark suite.

The 100U's higher boost clock of 4.70 GHz could theoretically help in short, lightly threaded bursts, but the recorded single-thread benchmarks show the 305 ahead by 11.8% to 19.4% despite the lower boost ceiling. The 305's higher base clock appears to matter more in practice.

In summary, the 305 is the dominant performer across nearly every benchmark category. The 100U retains niche strengths in integer math and platform features, but the data does not support choosing it for general performance.