Intel Core 3 305 vs Intel Core 5 120U Comparison

Head-to-Head Benchmarks

The benchmark comparison between the Intel Core 3 305 and the Intel Core 5 120U reveals a clear overall winner, though the margins vary significantly by workload. Out of 17 recorded head-to-head tests, the Core 3 305 claims 13 wins, while the Core 5 120U takes 4. The average benchmark scores place the Core 3 305 at 18302, which is 2.3% above the Core 5 120U's 17898, and both processors sit at the 72nd percentile among all CPUs in the database.

The most dramatic difference appears in Cinebench R23 multi-core testing. The Core 3 305 scores 13123 against the Core 5 120U's 6659, a 97.1% advantage. This near-doubling of performance is the single largest gap in the entire comparison. The Core 3 305's advantage in this test is particularly striking given that the Core 5 120U has 10 cores and 12 threads, while the Core 3 305 has only 6 cores and 6 threads. The data suggests that the Core 3 305's newer architecture delivers substantially better multi-core efficiency per thread.

Cinebench R15 multi-core shows a smaller but still meaningful 14.9% lead for the Core 3 305, with scores of 1322 versus 1150.5. The R20 multi-core test narrows further to just 3% (5511 versus 5349). This progression across Cinebench versions suggests that the Core 3 305's advantage grows with longer, more demanding workloads, as R23 is the most intensive of the three tests.

Single-core performance tells a more nuanced story. In Cinebench R15 single-core, the Core 5 120U wins decisively with 245 points against 186, a 24.1% margin. However, in R20 single-core the Core 3 305 edges ahead at 777 versus 755, a 2.9% gain. The R23 single-core test continues this trend, with the Core 3 305 scoring 1852 versus 1756.5, a 5.4% advantage. The PassMark single-thread test reinforces the Core 3 305's position, showing 3977 against 3479, a 14.3% lead.

PassMark tests reveal distinct workload-specific strengths. The Core 5 120U dominates in integer math, scoring 52280 versus 32295, a 38.2% advantage. It also leads in data compression (166432 versus 146857, an 11.8% margin) and random string sorting (19060 versus 17623, a 7.5% gain). These wins point to the Core 5 120U's efficiency in tasks that leverage its higher core count and thread count.

The Core 3 305 counters with strong showings in several PassMark tests. Extended instructions show a 45.6% lead (13543 versus 9299), and find prime numbers shows a 117% advantage (115 versus 53). Floating point math goes to the Core 3 305 by 17.4% (42284 versus 36026), and physics tests show a 31.6% margin (1233 versus 937). Data encryption also favors the Core 3 305 at 5.4% (11019 versus 10453), while the multithread test is nearly even at 2.6% (15439 versus 15042).

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core 3 305 records an average benchmark score of 18302, while the Intel Core 5 120U sits at 17898. This represents a 2.3% overall advantage for the Core 3 305.

Q: How do the two processors compare in single-core performance?

A: The results are mixed. The Core 5 120U wins Cinebench R15 single-core by 24.1%, but the Core 3 305 wins R20 by 2.9%, R23 by 5.4%, and PassMark single-thread by 14.3%. The majority of single-core tests favor the Core 3 305.

Q: What is the largest performance gap between the two in any test?

A: The biggest difference appears in Cinebench R23 multi-core, where the Core 3 305 scores 13123 versus the Core 5 120U's 6659, a 97.1% advantage.

Q: Does the Core 5 120U win any tests decisively?

A: Yes, the Core 5 120U leads by 38.2% in PassMark integer math and by 24.1% in Cinebench R15 single-core. It also wins data compression by 11.8% and random string sorting by 7.5%.

Q: Which processor has the higher boost clock?

A: The Core 5 120U has a boost clock of 5.00 GHz, which is higher than the Core 3 305's 4.30 GHz. Despite this, the Core 3 305 wins most benchmark tests.

Q: Are both processors currently in production?

A: Yes, both the Intel Core 3 305 and the Intel Core 5 120U have an active production status according to the database.

The Verdict

The recorded data points to the Intel Core 3 305 as the stronger overall performer. Its 13 wins across 17 head-to-head benchmarks, combined with a 2.3% higher average score, establishes a clear pattern. The 97.1% margin in Cinebench R23 multi-core is especially telling, as that test is widely considered representative of sustained heavy workloads.

The Core 5 120U does have specific strengths. Its 38.2% lead in integer math and 24.1% advantage in Cinebench R15 single-core show that it remains competitive in certain scenarios. The data compression and random string sorting wins also indicate that the Core 5 120U handles memory-intensive data manipulation tasks well.

For users prioritizing overall benchmark performance, the Core 3 305 is the choice based on the data. Its wins span more test categories and include the most demanding multi-core workloads. The Core 5 120U may be preferable for narrowly defined tasks involving integer-heavy calculations or data compression, but the broader evidence favors the Core 3 305.

Specification Differences

The two processors diverge across nearly every major specification. The Core 3 305 uses 6 cores and 6 threads, while the Core 5 120U offers 10 cores and 12 threads. Base clocks are close, with the Core 3 305 at 1.50 GHz and the Core 5 120U at 1.40 GHz, but boost clocks differ more substantially: 4.30 GHz for the Core 3 305 versus 5.00 GHz for the Core 5 120U.

Thermal design power is identical at 15 watts for both. The socket types differ, with the Core 3 305 using Intel BGA 1516 and the Core 5 120U using Intel BGA 1744. Cache configurations are notably different. The Core 3 305 has 192 KB of L1 cache, 2.5 MB of L2 cache, and 6 MB of shared L3 cache. The Core 5 120U lists 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 12 MB of shared L3 cache.

Memory support also separates the two. The Core 3 305 supports DDR5 and LPDDR5X with a single-channel memory bus and 59.7 GB/s of bandwidth. The Core 5 120U supports DDR4 and DDR5 with a dual-channel memory bus, though no bandwidth figure is recorded. PCIe lanes favor the Core 5 120U, which has 8 CPU-only Gen 4 lanes versus 6 for the Core 3 305.

The release dates place the Core 3 305 in 2026 and the Core 5 120U in 2024. The Core 3 305 has a launch MSRP of $309, while no launch MSRP is recorded for the Core 5 120U. Both processors have locked multipliers.

Architecture Differences

The Core 3 305 is built on the Wildcat Lake architecture with a process node of 3 nm, while the Core 5 120U uses the Raptor Lake architecture with a 10 nm process node. Both are manufactured by Intel. The Core 3 305's codename is Wildcat Lake, and its generation is listed as Core 3 (Wildcat Lake). The Core 5 120U's codename is Raptor Lake-U, with generation listed as Core 5 (Raptor Lake-U).

Integrated graphics differ as well. The Core 3 305 features Intel Xe3 Graphics with 1 Xe execution unit, while the Core 5 120U includes Iris Xe Graphics with 80 execution units. This is a substantial difference in graphics capability, though benchmark data for graphics is not included in this comparison.

The cache architecture reflects the different design philosophies. The Core 3 305's 6 MB of shared L3 cache is half of the Core 5 120U's 12 MB. However, the Core 3 305's 3 nm process node represents a more advanced manufacturing technology compared to the 10 nm node of the Core 5 120U. Neither processor supports ECC memory.

Where Each One Wins

The Intel Core 3 305 wins in the majority of test categories, with its most significant advantages appearing in Cinebench R23 multi-core (97.1% ahead), PassMark find prime numbers (117% ahead), and PassMark extended instructions (45.6% ahead). It also leads in floating point math (17.4%), single-thread PassMark (14.3%), and Cinebench R15 multi-core (14.9%). These results suggest the Core 3 305 is better suited for general computing, scientific calculations, and workloads that benefit from its newer architecture.

The Core 5 120U wins in four specific areas: PassMark integer math (38.2% ahead), Cinebench R15 single-core (24.1% ahead), PassMark data compression (11.8% ahead), and PassMark random string sorting (7.5% ahead). These wins point to strengths in integer-heavy computations and data organization tasks. The Core 5 120U's higher core count (10 versus 6) and thread count (12 versus 6) may contribute to its performance in these specific workloads.

For users selecting between these processors, the decision depends on workload type. The Core 3 305 is the better all-around choice based on benchmark wins and average score. The Core 5 120U remains viable for narrowly focused tasks involving integer math or data compression, where its specific advantages are substantial. The data shows a clear overall winner, but the Core 5 120U's niche strengths should not be overlooked for specialized applications.