Intel Celeron 4305U

The Intel Celeron 4305U is a mobile processor from Intel’s Whiskey Lake-U family, fabricated on Intel’s 10 nm process, and released on April 15, 2019. It has 2 cores and 2 threads at a 2.20 GHz base clock with no boost clock, a 15 W TDP, and an Intel BGA 1528 socket. The processor integrates UHD Graphics 620, supports dual-channel DDR4 memory with 34.1 GB/s of bandwidth, and provides Gen 3 PCIe with 16 CPU lanes. Its average benchmark score is 624, placing it at the 14th percentile of all CPUs in this database. The launch MSRP was $107.

Benchmark Performance

The available benchmark scores consistently place the Celeron 4305U at the low end of the database. Its Cinebench R15 multicore score is 133. In Cinebench R20, it scores 557 multicore and 78 single-core. In Cinebench R23, it scores 1,327 multicore and 187 single-core. Geekbench results are 1,330 multicore and 758 single-core. These are low absolute scores, and the 14th percentile rank confirms that the chip is below the large majority of CPUs in the database.

The nearest-rival table reinforces this position. The Celeron G3900 has an average score of 624 with a delta of -0.1%. The Celeron N4505 also has an average score of 624 and a delta of -0.1%. The Core i7-920XM has an average score of 623 with a delta of 0.1%. The Core i5-2450M has an average score of 625 with a delta of -0.2%. At the aggregate level, no rival in this group differs by more than 0.2%, which means the 4305U is essentially tied with all four of them in the database’s average benchmark metric.

The Cinebench R20 and R23 single-core scores are particularly low, and because the processor has no boost clock, those single-core results represent the maximum frequency behavior rather than a transient boost. The data does not show a workload where the 4305U separates itself from this rival cluster. Instead, the benchmark results indicate a narrow performance band shared with several other budget-oriented processors.

Who Should Consider It

The Celeron 4305U is aimed at mobile systems where low power matters more than high throughput. With 2 cores and 2 threads, it is not a candidate for heavily parallel workloads. The Geekbench single-core score of 758 and the Cinebench R20 single-core score of 78 suggest that light productivity work, such as document editing, spreadsheet use, and web-based tasks, is the realistic performance envelope.

For content creation, the data is less favorable. The Cinebench R23 multicore score of 1,327 and Geekbench multicore score of 1,330 are low relative to the broader database, so video encoding, 3D rendering, and other multithreaded creation tasks would likely be constrained by the processor. The integrated UHD Graphics 620 is present, but no graphics benchmark scores are included in the data, so any gaming assessment must rely on the low CPU scores alone.

The 14th percentile placement means this processor is best suited to users who are not performance-sensitive. It is a mobile BGA part, so the buyer is tied to the laptop platform at purchase time. Office work, lightweight multitasking, and occasional media playback fit the profile. Users with sustained multithreaded workloads should look above this chip in the benchmark hierarchy.

Power and Thermals

The Celeron 4305U has a 15 W TDP, which places it in Intel’s low-power mobile class. The 10 nm process node and the absence of a boost clock mean the CPU does not have a higher frequency state to push power upward. All benchmark work happens at the fixed 2.20 GHz base clock.

The cooling implications are modest. A 15 W TDP generally implies a low-power mobile cooling solution rather than a high-performance desktop cooler. The exact cooler is not specified in the data, but the TDP class points to a small fan or passive solution in a lightweight mobile chassis. The integrated UHD Graphics 620 shares the same package, so the same thermal solution covers both the CPU and the integrated graphics when active.

No thermal or power-draw measurements are included in the benchmark data, so the only power-related fact is the 15 W TDP itself. That number, combined with the 2-core/2-thread design and the lack of boost frequency, indicates a thermally restrained processor.

Platform and Compatibility

The Celeron 4305U uses the Intel BGA 1528 socket, a mobile platform package. Its architecture is Whiskey Lake, with the codename Whiskey Lake-U, and its market segment is Mobile. Memory support is dual-channel DDR4 with 34.1 GB/s of bandwidth, and ECC memory is not supported. The PCIe implementation is Gen 3 with 16 lanes available from the CPU only.

The cache layout consists of 64 KB of L1 per core, 256 KB of L2 per core, and 2 MB of shared L3 cache. The processor has a locked multiplier, and with no boost clock listed, the 2.20 GHz base clock is the sole operating frequency. The part number is SRFG1SRESL.

Production status is end-of-life, and the release date is April 15, 2019. For upgrade path considerations, the BGA socket is a mobile package, so the processor is not a socketed desktop part. The end-of-life status also means the platform is no longer an active production target.

How It Compares

The Celeron G3900 appears in the nearest-rival list with an average score of 624 and a delta of -0.1%. The 4305U and the G3900 are effectively tied in aggregate performance. The data does not show any meaningful advantage for either chip; they occupy the same benchmark tier.

The Celeron N4505 also has an average score of 624 and a delta of -0.1%. Like the G3900, the N4505 is statistically indistinguishable from the 4305U in this database. The 4305U does not separate itself from this rival in any of the aggregate metrics provided.

The Core i7-920XM has an average score of 623 with a delta of 0.1%. This is the only rival in the group where the 4305U shows a positive delta, but 0.1% is a negligible difference. The data places the two processors in the same performance class.

The Core i5-2450M has an average score of 625 with a delta of -0.2%. This is the largest gap in the rival group, yet it is still only two-tenths of a percent. In aggregate benchmark terms, the 4305U trails by a marginal amount rather than a substantial one.

FAQ

Q: What socket does the Intel Celeron 4305U use?

A: It uses the Intel BGA 1528 socket.

Q: Does the Celeron 4305U support ECC memory?

A: No, ECC memory is not supported. It supports dual-channel DDR4 memory with 34.1 GB/s bandwidth.

Q: What integrated graphics does the processor include?

A: The integrated graphics is Intel UHD Graphics 620.

Q: Is the multiplier unlocked?

A: No, the multiplier is not unlocked, and the processor has a 2.20 GHz base clock with no boost clock.

Q: When was the Celeron 4305U released, and is it still in production?

A: It was released on April 15, 2019, and its production status is end-of-life.

Q: How many cores and threads does the Celeron 4305U have?

A: It has 2 cores and 2 threads.

Single-Thread vs Multi-Thread Behavior

The Celeron 4305U has equal core and thread counts, meaning there are no additional logical threads beyond the two physical cores. This limits the multi-thread ceiling. In Geekbench, the single-core score is 758 and the multi-core score is 1,330. In Cinebench R23, the single-core score is 187 and the multi-core score is 1,327. In Cinebench R20, the single-core score is 78 and the multi-core score is 557.

The multi-core scores are higher than the single-core scores in every suite, which reflects both cores participating in the workload. But the data does not indicate strong scaling because the thread count is only two. Real-world applications that can use exactly two threads will see the multi-core result, while applications limited to one thread will land near the single-core scores.

The lack of a boost clock is important here. A processor with a boost clock can temporarily raise single-thread frequency to improve responsiveness in lightly threaded tasks. The 4305U cannot do that; its single-core scores are fixed by the 2.20 GHz base clock. This makes the single-thread behavior predictable but also low compared to the rest of the database. Workloads that are primarily single-threaded will be confined to the lower benchmark range, while workloads optimized for two threads will at least use both available cores.