Intel Core 3 305 vs Intel Core 5 221E Comparison

Head-to-Head Benchmarks

The recorded data presents a decisive outcome: the Intel Core 5 221E wins all 17 head-to-head benchmark comparisons against the Intel Core 3 305. The largest margin appears in PassMark integer math, where the Core 5 221E scores 117,813 against 32,295 for the Core 3 305, a delta of -72.6% from the Core 3's perspective. That is a massive gap, more than 3.6 times the raw score.

Cinebench results follow a consistent pattern. In Cinebench R23 multi-core, the Core 5 221E scores 25,933 versus 13,123 for the Core 3 305, a -49.4% delta. The single-core R23 test shows 3,661 against 1,852, also -49.4%. This consistency across the entire Cinebench R15, R20, and R23 suite, with every delta at -49.4% or -49.5%, indicates a fundamental throughput advantage rather than a workload-specific quirk.

The closest contest appears in PassMark single-thread tests. The Core 5 221E scores 4,147, while the Core 3 305 scores 3,977, a delta of only -4.1%. This narrow margin suggests that for purely single-threaded, light workloads, the two processors are nearly equivalent. The Core 3 305 has a boost clock of 4.30 GHz, while the Core 5 221E boosts to 5.20 GHz, yet the single-thread score difference remains modest. The data implies that the Core 3 305's single-thread efficiency offsets some of the clock speed gap.

Data compression shows a wide split: the Core 5 221E scores 324,285 against 146,857, a -54.7% delta. Encryption also favors the larger chip, 19,205 versus 11,019, a -42.6% delta. Extended instructions show a smaller gap, 18,216 versus 13,543, at -25.7%. Prime number finding, which often scales with core count, shows 173 versus 115, a -33.5% delta. Floating point math delivers 79,028 against 42,284, a -46.5% delta. Physics simulation scores 2,230 versus 1,233, a -44.7% delta. Random string sorting, another throughput-heavy test, shows 37,686 versus 17,623, a -53.2% delta. Multi-thread PassMark scores 30,510 versus 15,439, a -49.4% delta.

The average benchmark score in the database tells the same story: the Core 3 305 averages 18,302 points, placing it at the 72nd percentile of all CPUs, while the Core 5 221E averages 40,144 points, placing it at the 87th percentile. The Core 5 221E's nearest rivals include the AMD Ryzen 7 7700 with an average score of 40,081 (delta 0.2%), the AMD Ryzen AI 9 365 at 40,048 (delta 0.2%), and the AMD Ryzen 9 270 at 40,246 (delta -0.3%). The Core 3 305's nearest rivals include the Intel Core i3-14100 at 18,318 (delta -0.1%) and the Intel Core 5 330 at 18,345 (delta -0.2%). These proximity scores indicate that the Core 3 305 sits in a performance class far below the Core 5 221E, whose nearest competitors are high-end desktop and mobile parts.

FAQ

Q: Which processor has the higher multi-core performance?

A: The Intel Core 5 221E dominates in every multi-core test. For example, Cinebench R23 multi-core shows 25,933 for the Core 5 221E versus 13,123 for the Core 3 305, a -49.4% delta from the Core 3's side.

Q: How close is single-thread performance between the two?

A: The gap is small. PassMark single-thread scores are 4,147 for the Core 5 221E and 3,977 for the Core 3 305, a delta of only -4.1%. Cinebench R23 single-core shows a larger relative gap, 3,661 versus 1,852, but this test also reflects the Core 5's higher boost clock.

Q: Does the Core 3 305 win any benchmark?

A: No. The head-to-head data records 17 comparisons, and the Core 5 221E wins all 17. The Core 3 305 has zero wins in the recorded data.

Q: What is the memory bandwidth difference?

A: The Core 5 221E supports dual-channel memory with a bandwidth of 89.6 GB/s, while the Core 3 305 uses a single-channel bus with 59.7 GB/s. The Core 5's bandwidth is roughly 50% higher, which contributes to its advantage in memory-intensive workloads like data compression.

Q: Which processor supports ECC memory?

A: Only the Intel Core 5 221E supports ECC memory. The Core 3 305 does not have ECC support in its recorded specifications.

Q: How do their average benchmark scores compare?

A: The Core 3 305 has an average benchmark score of 18,302, while the Core 5 221E averages 40,144. The Core 5 221E's score is more than double, and it places at the 87th percentile versus the 72nd percentile for the Core 3 305.

Where Each One Wins

The Intel Core 5 221E wins in every recorded workload category, but the size of the advantage varies. For integer math, the Core 5 221E is overwhelmingly faster, scoring 117,813 versus 32,295, a -72.6% delta. This suggests the Core 5 221E is the clear choice for general computation, database operations, and any workload that involves heavy arithmetic on whole numbers.

Data compression and encryption also favor the Core 5 221E strongly, with deltas of -54.7% and -42.6% respectively. These tasks benefit from the Core 5 221E's 14 cores and 20 threads, plus its dual-channel memory and higher memory bandwidth of 89.6 GB/s. The Core 3 305, with only 6 cores and 6 threads and single-channel memory at 59.7 GB/s, falls behind substantially in these throughput-oriented tasks.

For floating point math and physics simulation, the delta is -46.5% and -44.7% respectively. These workloads scale with both core count and memory subsystem performance. The Core 5 221E's 24 MB of shared L3 cache, versus 6 MB on the Core 3 305, also helps with larger data sets.

The closest area is single-thread performance. The delta of -4.1% in PassMark single-thread suggests that for very light, single-tasked applications, the two processors perform nearly identically. The Core 3 305's 4.30 GHz boost clock and its newer 3 nm process node partly compensate for the Core 5 221E's 5.20 GHz boost clock. However, even in Cinebench R23 single-core, the Core 5 221E leads by a wide margin, 3,661 versus 1,852, so the single-thread advantage is real but workload-dependent.

The Core 3 305 has no unique winning scenario in the recorded data. Its lower power envelope of 15 W TDP, versus 65 W for the Core 5 221E, makes it suitable for compact mobile systems, but the benchmark scores do not show any performance area where it leads.

Specification Differences

The two processors differ in nearly every core specification. The Core 3 305 has 6 cores and 6 threads, while the Core 5 221E has 14 cores and 20 threads. Base clocks are 1.50 GHz for the Core 3 305 and 2.70 GHz for the Core 5 221E. Boost clocks are 4.30 GHz and 5.20 GHz respectively.

Thermal design power differs substantially: the Core 3 305 is rated at 15 W, while the Core 5 221E is rated at 65 W. This reflects the Core 3 305's mobile focus and the Core 5 221E's desktop orientation.

Socket types differ: the Core 3 305 uses Intel BGA 1516, a soldered mobile socket, while the Core 5 221E uses Intel Socket 1700, a desktop LGA socket. The Core 3 305 has a process node of 3 nm, while the Core 5 221E uses a 10 nm node. The Core 5 221E has a recorded die size of 257 mm², while the Core 3 305 has no die size recorded.

Cache configurations are very different. The Core 3 305 has 192 KB of L1 cache, 2.5 MB of L2, and 6 MB of shared L3. The Core 5 221E has 80 KB per core of L1, 2 MB per core of L2, and 24 MB of shared L3. The Core 5 221E's larger shared L3 is a significant advantage for multi-threaded workloads.

Memory support differs: the Core 3 305 supports DDR5 and LPDDR5X with a single-channel bus and 59.7 GB/s bandwidth. The Core 5 221E supports DDR4 and DDR5 with a dual-channel bus and 89.6 GB/s bandwidth. ECC memory is supported only on the Core 5 221E.

PCIe lanes differ: the Core 3 305 has Gen 4 with 6 lanes, while the Core 5 221E has Gen 5 with 16 lanes. Integrated graphics also differ: the Core 3 305 uses Intel Xe3 Graphics (1 Xe), while the Core 5 221E uses UHD Graphics 730.

The Core 3 305 released on 2026-04-15 with a launch MSRP of $309. The Core 5 221E released on 2025-01-12 with a launch MSRP of $232. Both are active production parts with locked multipliers.

Architecture Differences

The Core 3 305 is based on the Wildcat Lake codename, part of the Core 3 generation, built on a 3 nm process at Intel's foundry. The Core 5 221E uses the Bartlett Lake codename, part of the Core 5 generation, on a 10 nm process, also at Intel's foundry. The process node difference is notable: 3 nm versus 10 nm, which helps explain the Core 3 305's lower power draw of 15 W despite a much lower core count.

The Core 3 305 has 6 cores and 6 threads, meaning no hyper-threading. The Core 5 221E has 14 cores and 20 threads, indicating that 6 of its cores support additional threads. This thread count difference directly drives the multi-core benchmark gaps.

Cache architecture differs fundamentally. The Core 3 305 uses smaller, shared caches: 192 KB L1, 2.5 MB L2, and 6 MB L3 shared. The Core 5 221E uses per-core L1 of 80 KB and per-core L2 of 2 MB, plus a 24 MB shared L3. The per-core L2 design on the Core 5 221E gives each core more dedicated fast memory, while the larger L3 pool helps with shared data across many threads.

Memory architecture also differs. The Core 3 305 is single-channel, limiting its memory bandwidth to 59.7 GB/s. The Core 5 221E is dual-channel, reaching 89.6 GB/s. This bandwidth difference matters for data-heavy workloads such as compression, encryption, and string sorting, where the Core 5 221E's deltas range from -42.6% to -54.7%.

PCIe generation and lane count differ: the Core 3 305 offers Gen 4 with 6 lanes, while the Core 5 221E offers Gen 5 with 16 lanes. This affects peripheral connectivity, with the Core 5 221E supporting more and faster expansion devices.

The integrated graphics differ as well. The Core 3 305 uses Intel Xe3 Graphics with 1 Xe unit, a newer architecture on the 3 nm node. The Core 5 221E uses UHD Graphics 730, which is an older architecture. For tasks relying on the iGPU, the Core 3 305 may have an architectural advantage, though no iGPU benchmarks are recorded in the data.

ECC memory support is present only on the Core 5 221E, which is typical for desktop or embedded parts targeting reliability-sensitive use cases. The Core 3 305's mobile segment and lack of ECC support align with consumer mobile usage.

The Verdict

The data directs a clear conclusion. The Intel Core 5 221E wins every recorded benchmark, with an average score of 40,144 versus 18,302 for the Core 3 305. The Core 5 221E sits at the 87th percentile of all CPUs, while the Core 3 305 sits at the 72nd percentile. Its nearest rivals include the AMD Ryzen 7 7700 and AMD Ryzen AI 9 365, indicating it competes in a much higher performance class.

The Core 5 221E is the choice for any workload that involves heavy multi-threading, large data sets, or memory-intensive operations. Its 14 cores, 20 threads, 24 MB of L3 cache, and dual-channel 89.6 GB/s memory bandwidth produce decisive advantages in integer math, compression, encryption, and multi-threaded rendering. The single-thread margin is small in PassMark, but the Cinebench R23 single-core score still shows a 3,661 versus 1,852 advantage, so the Core 5 221E leads even in lightly threaded tasks.

The Core 3 305, with its 6 cores, 6 threads, 6 MB L3, and single-channel memory, is limited to low-power mobile scenarios. Its 15 W TDP and 3 nm process node make it suitable for compact, power-sensitive devices, but the benchmark data shows no performance area where it wins. Its average score of 18,302 places it near the Intel Core i3-14100 and Intel Core 5 330, which are entry-level parts.

For users who need maximum throughput from the recorded metrics, the Core 5 221E is the only option. For those constrained by power and form factor, the Core 3 305 offers a much lower TDP and a mobile socket, but at a significant performance cost. The data does not support any scenario where the Core 3 305 outperforms the Core 5 221E. The launch MSRP of the Core 5 221E is $232, while the Core 3 305 is $309, though the database records no pricing analysis beyond these figures.