AMD Ryzen 9 9900X vs Intel Core 3 305 Comparison

The AMD Ryzen 9 9900X and Intel Core 3 305 occupy different corners of the processor market, and the benchmark data reflects that divide clearly. The Ryzen 9 9900X is a desktop part aimed at high-throughput workloads, while the Core 3 305 is a low-power mobile chip. The recorded head-to-head results show a sweep for the AMD processor, with every single benchmark in the comparison going its way. The margin of victory varies from a modest 17.5% in single-threaded tests to a dominant 460.6% in integer math, painting a picture of two chips with entirely different performance envelopes.

Head-to-Head Benchmarks

The most lopsided result in the database is the PassMark integer math test. The Ryzen 9 9900X scores 181,056, while the Core 3 305 finishes at 32,295, a delta of 460.6%. This massive gap highlights the difference in core count and clock speeds between the two parts. A similar pattern appears in data compression, where the AMD chip scores 683,579 against 146,857 for the Intel part, a 365.5% advantage. These are compute-heavy tasks that scale with both core count and memory bandwidth, and the Ryzen 9 9900X has clear superiority in both areas.

The margin narrows considerably in single-threaded workloads, but the AMD processor still wins. In Cinebench R23 single-core, the Ryzen 9 9900X scores 2,253 versus 1,852 for the Core 3 305, a 21.7% lead. The PassMark single-thread test shows a similar story: 4,672 versus 3,977, a 17.5% difference. This suggests that even when the workload is limited to one core, the higher boost clock of 5.60 GHz on the AMD part outpaces the 4.30 GHz of the Intel chip. In Cinebench R15 single-core, the gap is larger at 89.8%, with scores of 353 and 186, though this older benchmark tends to amplify differences in instruction-level efficiency.

Multi-threaded workloads follow the expected trend. Cinebench R23 multi-core delivers a 145.2% win for the Ryzen 9 9900X, with 32,172 points against 13,123. The older R15 multi-core test shows a 278.8% delta, with 5,008 versus 1,322. The PassMark multi-thread score is 54,643 versus 15,439, a 253.9% advantage. The physics test in PassMark, which often mirrors gaming physics simulations, gives the AMD chip a 174.2% lead with 3,381 points versus 1,233. Extended instructions and random string sorting also show large gaps: 307.9% and 308.6% respectively, reinforcing that the Ryzen 9 9900X is built for sustained heavy lifting.

The only categories where the Core 3 305 comes close are the single-threaded tests, but even there it loses by double digits. Across all 15 head-to-head benchmarks, the Ryzen 9 9900X records 15 wins and zero losses. The average benchmark score for the AMD part is 57,498, placing it in the 92nd percentile of all CPUs, while the Intel chip averages 18,302 and sits in the 72nd percentile. The nearest rivals for the Ryzen 9 9900X include the AMD EPYC 9015 at 57,555 (0.1% ahead) and the Intel Core i9-14900 at 58,115 (1.1% ahead), showing it trades blows with server and high-end desktop parts. The Core 3 305, by contrast, sits within 0.4% of the AMD Ryzen 5 2600E and 0.1% of the Intel Core i3-14100, placing it firmly in entry-level territory.

Architecture Differences

The two processors come from different foundries and use different process nodes. The Ryzen 9 9900X is built on a 4 nm process at TSMC, while the Core 3 305 uses a 3 nm node at Intel. Despite the smaller node, the Intel part does not translate that into a performance advantage in these tests. The AMD chip is based on the Zen 5 architecture with the Granite Ridge codename, part of the Ryzen 9 generation. The Intel part uses the Wildcat Lake codename in the Core 3 generation, with no specific architecture listed in the database.

Physical configuration differs substantially. The Ryzen 9 9900X has 12 cores and 24 threads, while the Core 3 305 has 6 cores and 6 threads, meaning no simultaneous multi-threading on the Intel part. This alone explains much of the multi-core performance gap. The AMD chip also has a larger cache hierarchy: 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of L3. The Intel part offers 192 KB of L1, 2.5 MB of L2, and 6 MB of shared L3. The transistor count for the Ryzen 9 9900X is listed at 16,630 million across a die size of 2x 70.6 mm², while no transistor or die size data is available for the Core 3 305.

Memory support diverges as well. The Ryzen 9 9900X uses dual-channel DDR5 with a bandwidth of 89.6 GB/s, while the Core 3 305 supports DDR5 and LPDDR5X but only through a single-channel bus, yielding 59.7 GB/s. ECC memory is supported on the AMD part, but not on the Intel chip. PCIe connectivity also differs: the Ryzen 9 9900X offers Gen 5 with 24 lanes from the CPU, while the Core 3 305 provides Gen 4 with 6 lanes. The sockets are incompatible, with the AMD chip using AM5 and the Intel part using BGA 1516, which reflects the desktop versus mobile split.

Integrated graphics are present on both, but they are not identical. The Ryzen 9 9900X includes Radeon Graphics, while the Core 3 305 has Intel Xe3 Graphics with 1 Xe core. The TDP ratings show the intended use cases: 120 watts for the AMD desktop part versus 15 watts for the Intel mobile chip. The Ryzen 9 9900X has an unlocked multiplier, while the Core 3 305 does not. The release dates are also far apart: the AMD chip launched in August 2024, and the Intel part is dated April 2026.

Where Each One Wins

The benchmark results offer a clear split by workload type. The Ryzen 9 9900X wins every recorded test, but the magnitude of the win varies. In single-threaded applications, the lead is smaller, between 17.5% and 21.7%, which means the Intel Core 3 305 can hold its own in lightly threaded tasks like basic office work, web browsing, or legacy software that relies on one fast core. The Ryzen 9 9900X still wins, but the margin is not overwhelming.

For multi-threaded and compute-heavy tasks, the Ryzen 9 9900X dominates. Data compression, encryption, extended instructions, prime number finding, floating point math, and integer math all show deltas above 184%, with the largest at 460.6%. This makes the AMD chip the clear choice for video rendering, 3D modeling, scientific computation, and any workload that can use all 24 threads. The Cinebench multi-core results confirm this, with a 145.2% lead in R23 and a 278.8% lead in R15.

The Core 3 305, despite losing all benchmarks, has its own strengths based on the architectural data. Its 15 watt TDP and 6-core, 6-thread configuration make it suitable for fanless or passively cooled laptops where battery life and heat are priorities. The single-channel memory and 6 PCIe Gen 4 lanes are sufficient for basic productivity and media consumption. The integrated Intel Xe3 Graphics with 1 Xe core provides display output without a discrete GPU, which keeps system cost and power low. The Ryzen 9 9900X, by contrast, requires a more substantial cooling solution and a platform with a higher power budget, but it delivers desktop-class performance that the mobile chip cannot match.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen 9 9900X has 12 cores and 24 threads, while the Intel Core 3 305 has 6 cores and 6 threads. The AMD part also supports simultaneous multi-threading, which the Intel chip does not.

Q: What is the performance gap in single-core tests?

A: In Cinebench R23 single-core, the Ryzen 9 9900X scores 2,253 against 1,852 for the Core 3 305, a 21.7% lead. The PassMark single-thread test shows a 17.5% advantage, with 4,672 versus 3,977.

Q: How do the TDP ratings compare?

A: The Ryzen 9 9900X has a TDP of 120 watts, while the Core 3 305 has a TDP of 15 watts. This reflects the desktop versus mobile design targets of the two chips.

Q: What memory types do they support?

A: The Ryzen 9 9900X supports DDR5 with a dual-channel bus and 89.6 GB/s bandwidth. The Core 3 305 supports DDR5 and LPDDR5X, but only via a single-channel bus with 59.7 GB/s bandwidth, and it does not support ECC memory.

Q: Which chip has a higher boost clock?

A: The Ryzen 9 9900X boosts to 5.60 GHz, while the Core 3 305 boosts to 4.30 GHz. The base clocks are 4.40 GHz and 1.50 GHz, respectively.

Q: What are the average benchmark scores and percentiles?

A: The Ryzen 9 9900X has an average benchmark score of 57,498 and ranks in the 92nd percentile of all CPUs. The Core 3 305 has an average score of 18,302 and ranks in the 72nd percentile.

The Verdict

The data in the database makes the choice straightforward for most users. The AMD Ryzen 9 9900X wins all 15 head-to-head benchmarks, with an average score of 57,498 versus 18,302 for the Intel Core 3 305. The nearest rivals for the AMD chip include the Intel Core i9-14900, which sits 1.1% ahead in average score, and the AMD EPYC 7313, which is 0.2% behind. This places the Ryzen 9 9900X in the company of high-end desktop and server parts, while the Core 3 305 aligns with entry-level processors like the Intel Core i3-14100, which is 0.1% behind it.

For users building a desktop workstation or a high-performance gaming rig, the Ryzen 9 9900X is the only choice based on this data. Its 12 cores, 24 threads, 64 MB of L3 cache, and 89.6 GB/s memory bandwidth provide a substantial advantage in rendering, encoding, and compilation workloads. The unlocked multiplier also allows overclocking, though the 120 watt TDP requires adequate cooling. The launch MSRP for the AMD part is $499, which reflects its position as a premium desktop processor.

For users purchasing a thin-and-light laptop, the Intel Core 3 305 is the more appropriate option, not because it performs better, but because its 15 watt TDP, single-channel memory, and 6 PCIe Gen 4 lanes fit the constraints of mobile hardware. Its integrated Intel Xe3 Graphics with 1 Xe core handles basic display tasks, and its 3 nm process at Intel suggests a focus on efficiency rather than raw speed. The launch MSRP is $309. The benchmark data shows it loses every test, but the architecture is designed for a different market segment: mobile devices where battery life and thermal limits matter more than multi-core throughput. The Ryzen 9 9900X cannot be placed in such a system due to its AM5 socket and higher power requirements. The choice, therefore, depends on the platform and the workload. For desktop compute, the AMD part is overwhelmingly superior. For mobile efficiency, the Intel part is the intended fit, despite its lower scores.