CPU Comparison

The Intel Core i5-13420H and Intel Core 3 305 are both mobile processors aimed at laptops, but they represent fundamentally different design philosophies. The i5-13420H is a higher-power part from the Raptor Lake generation, while the Core 3 305 is a newer, more efficient design on a smaller process node. Benchmark data shows a clear split: the i5-13420H dominates in multi-threaded and integer-heavy workloads, while the Core 3 305 counters with superior single-thread performance and wins in specific test categories. This makes the choice highly dependent on the intended use case.

Head-to-Head Benchmarks

The most dramatic separation appears in integer math. The i5-13420H scores 58156 in PassMark integer math against just 32295 for the Core 3 305, a massive 80.1% advantage. This is the largest delta in the entire benchmark set, indicating the i5's hybrid core arrangement is far better suited to arithmetic-heavy tasks. Data compression follows a similar pattern: the i5-13420H hits 209450 in PassMark data compression, which is 42.6% ahead of the Core 3 305's 146857. These two wins alone make the i5-13420H the obvious choice for productivity software that relies on compression or spreadsheets.

The i5-13420H also wins in random string sorting by 25.1% (22045 vs 17623) and in PassMark multithread by 13.2% (17475 vs 15439). Cinebench R15 and R20 results reinforce the i5's multi-core lead, with the i5-13420H scoring 1738 and 6013 respectively, versus 1322 and 5511 for the Core 3 305. In R15 multicore, that is a 31.5% gap, though it narrows to 9.1% in R20. The i5 also edges out a narrow win in floating-point math, scoring 42806 against 42284, a 1.2% margin. Data encryption is another i5 win, though modest at 4.9% (11559 vs 11019).

The Core 3 305 fights back decisively in newer Cinebench versions. In Cinebench R23 multicore, the Core 3 305 scores 13123 against the i5-13420H's 11084, a 15.5% reversal. This is particularly notable because the i5-13420H wins Cinebench R15 and R20 multicore, suggesting the Core 3 305's architecture scales better with the R23 workload. Single-thread results also favor the Core 3 305: it scores 1852 in Cinebench R23 single-core versus 1689 for the i5, an 8.8% lead. PassMark single-thread shows the same story, with the Core 3 305 at 3977 versus 3396, a 14.6% advantage.

Prime number finding is a stunning win for the Core 3 305: it scores 115 versus just 52 for the i5-13420H, a 54.8% difference in favor of the newer chip. Physics simulations also go to the Core 3 305, with a score of 1233 against 1012, a 17.9% margin. Extended instruction workloads slightly favor the Core 3 305 as well, at 13543 versus 12897, a 4.8% lead. Overall, the i5-13420H wins 10 benchmarks, while the Core 3 305 wins 7, but the distribution of wins is telling: the i5 dominates in raw throughput while the Core 3 305 takes efficiency-oriented and single-thread tests.

Architecture Differences

The two chips come from different worlds. The i5-13420H is built on a 10 nm process at Intel's foundry, using the Raptor Lake architecture with the Raptor Lake-H codename. It packs 8 cores and 12 threads, which indicates a hybrid layout of performance and efficiency cores. The Core 3 305, by contrast, uses a 3 nm process node, also Intel foundry, with the Wildcat Lake codename. It has 6 cores and only 6 threads, meaning no hyperthreading, consistent with a simpler, more power-efficient design.

Cache configurations differ sharply. The i5-13420H has 80 KB of L1 per core, 2 MB of L2 per core, and 12 MB of shared L3 cache. The Core 3 305 has a single L1 figure of 192 KB, 2.5 MB of L2, and only 6 MB of shared L3. The i5's larger L3 cache likely contributes to its data compression and sorting wins. The Core 3 305 instead relies on a more modern memory interface: it supports DDR5 and LPDDR5X over a single-channel bus with a stated memory bandwidth of 59.7 GB/s. The i5-13420H supports DDR4 and DDR5 over dual-channel but has no listed bandwidth figure.

PCIe lanes are another differentiator. The i5-13420H offers Gen 5 with 8 lanes (CPU only), while the Core 3 305 provides Gen 4 with 6 lanes. Integrated graphics differ as well: the i5-13420H includes Iris Xe Graphics with 80 execution units, while the Core 3 305 has Intel Xe3 Graphics (1 Xe). Neither chip has an unlocked multiplier, and both target the mobile segment. The i5-13420H uses the Intel BGA 1744 socket, while the Core 3 305 uses Intel BGA 1516. The i5-13420H released in January 2023, while the Core 3 305 is much newer, with an April 2026 release date.

FAQ

Q: Which processor has higher multi-threaded performance in older Cinebench versions?

A: The Intel Core i5-13420H wins in Cinebench R15 multicore by 31.5% (1738 vs 1322) and in R20 multicore by 9.1% (6013 vs 5511). However, the Core 3 305 flips the result in Cinebench R23 multicore, scoring 13123 against 11084, a 15.5% lead.

Q: Is the Core 3 305 faster in single-thread workloads?

A: Yes. The Core 3 305 leads in PassMark single-thread by 14.6% (3977 vs 3396) and in Cinebench R23 single-core by 8.8% (1852 vs 1689). The i5-13420H still wins Cinebench R15 single-core by 28% (238 vs 186) and R20 single-core by 9.1% (848 vs 777).

Q: How do the two compare in memory bandwidth?

A: The Core 3 305 has a listed memory bandwidth of 59.7 GB/s over a single-channel bus supporting DDR5 and LPDDR5X. The i5-13420H uses dual-channel memory with DDR4 and DDR5 support but no bandwidth figure is listed.

Q: Which chip has more cores and threads?

A: The i5-13420H has 8 cores and 12 threads, while the Core 3 305 has 6 cores and 6 threads. The i5's extra threads likely drive its wins in multithreaded PassMark and Cinebench R15/R20.

Q: What are the process node differences?

A: The i5-13420H is fabricated on a 10 nm process, while the Core 3 305 uses a 3 nm process. Both are made by Intel, but the 3 nm node is significantly newer.

Q: Which processor is better for prime number calculations?

A: The Core 3 305 is overwhelmingly better, scoring 115 in PassMark find prime numbers versus just 52 for the i5-13420H, a 54.8% advantage.

Specification Differences

• Cores: 8 for the i5-13420H, 6 for the Core 3 305.
• Threads: 12 for the i5-13420H, 6 for the Core 3 305.
• Base Clock: 2.10 GHz for the i5-13420H, 1.50 GHz for the Core 3 305.
• Boost Clock: 4.60 GHz for the i5-13420H, 4.30 GHz for the Core 3 305.
• TDP: 45 for the i5-13420H, 15 for the Core 3 305.
• Socket: Intel BGA 1744 for the i5-13420H, Intel BGA 1516 for the Core 3 305.
• Architecture: Raptor Lake for the i5-13420H, none listed for the Core 3 305.
• Codename: Raptor Lake-H for the i5-13420H, Wildcat Lake for the Core 3 305.
• Process Node: 10 nm for the i5-13420H, 3 nm for the Core 3 305.
• L1 Cache: 80 KB per core for the i5-13420H, 192 KB total for the Core 3 305.
• L2 Cache: 2 MB per core for the i5-13420H, 2.5 MB total for the Core 3 305.
• L3 Cache: 12 MB shared for the i5-13420H, 6 MB shared for the Core 3 305.
• Memory Support: DDR4 and DDR5 for the i5-13420H, DDR5 and LPDDR5X for the Core 3 305.
• Memory Bus: Dual-channel for the i5-13420H, single-channel for the Core 3 305.
• PCIe: Gen 5 with 8 lanes for the i5-13420H, Gen 4 with 6 lanes for the Core 3 305.
• Integrated Graphics: Iris Xe Graphics 80EU for the i5-13420H, Intel Xe3 Graphics (1 Xe) for the Core 3 305.
• Release Date: January 2023 for the i5-13420H, April 2026 for the Core 3 305.
• Launch MSRP: The Core 3 305 has a launch MSRP of $309; the i5-13420H has no listed price.

Where Each One Wins

The i5-13420H is the clear winner for multi-threaded productivity. Its 80.1% lead in integer math and 42.6% lead in data compression make it ideal for compilation, video editing, or any task that processes large datasets. The 25.1% advantage in random string sorting and 13.2% lead in PassMark multithread further cement its position for parallel workloads. Cinebench R15 and R20 multicore wins (31.5% and 9.1% respectively) suggest older rendering engines will favor the i5. Encryption, while close, still goes to the i5 by 4.9%, and floating-point math is a razor-thin 1.2% win.

The Core 3 305 is the better choice for single-thread and efficiency-sensitive tasks. Its 14.6% single-thread PassMark lead and 8.8% Cinebench R23 single-core win indicate snappier everyday responsiveness. The 54.8% advantage in prime number finding points to strengths in specific computational patterns, likely benefiting cryptography or scientific simulations. Physics simulations also favor the Core 3 305 by 17.9%, suggesting better performance in certain game physics or simulation engines. The 15.5% Cinebench R23 multicore win is a notable exception to the i5's multi-core dominance, hinting that newer rendering workloads may prefer the Core 3 305's architecture.

The Verdict

For a traditional laptop replacement that handles heavy multitasking, the Intel Core i5-13420H is the stronger all-rounder. The data shows it wins 10 out of 17 benchmarks, with particularly lopsided victories in integer math, data compression, and multithreaded tests. Its 8 cores and 12 threads, dual-channel memory, and 12 MB of L3 cache provide a robust foundation for content creation and productivity. The 45 TDP suggests it needs a beefier cooling solution, but the performance payoff is clear in the benchmark results.

The Intel Core 3 305 is the pick for users who prioritize single-thread speed and modern efficiency. Its 3 nm process, 15 TDP, and single-channel memory with 59.7 GB/s bandwidth point to a chip designed for thin-and-light laptops with long battery life. The single-thread wins and the Cinebench R23 multicore upset make it competitive for everyday use and even some rendering tasks. The $309 launch MSRP positions it as a specific market offering, though that price is only a single data point.

The choice comes down to workload. If you run multi-threaded applications that scale with cores, the i5-13420H's 80.1% integer math lead is impossible to ignore. If you value instantaneous response and run single-threaded software, the Core 3 305's 14.6% single-thread advantage will serve you better. Both chips sit at the 72nd percentile of all CPUs, so neither is a slouch. The i5-13420H is the safe bet for raw compute; the Core 3 305 is the forward-looking option for efficiency.