AMD Ryzen 9 3900X vs Intel Core Ultra 5 235 Comparison

The AMD Ryzen 9 3900X and Intel Core Ultra 5 235 represent two distinct philosophies in desktop computing: one is a 12-core, 24-thread Zen 2 part from 2019, while the other is a 14-core, 14-thread Arrow Lake chip from 2025. The data shows a clear split: the AMD processor dominates in legacy multi-threaded workloads, while the Intel chip wins decisively in single-thread performance and modern compute tasks. With an average benchmark score of 46,487 for the AMD part versus 46,062 for the Intel part, the two are remarkably close overall, separated by less than 1% in aggregate, yet their individual benchmark results vary by as much as 104.9% in favor of one or the other. This analysis breaks down the exact workloads where each CPU excels, the architectural choices that drive those differences, and the specification gaps that define their respective platforms.

FAQ

Q: Which processor has a higher average benchmark score?

A: The AMD Ryzen 9 3900X has an average benchmark score of 46,487, while the Intel Core Ultra 5 235 scores 46,062. This places both processors at the 89th percentile among all CPUs, with the AMD part holding a marginal 0.9% lead in aggregate performance.

Q: How do the two processors compare in Cinebench R23 multi-core?

A: The AMD Ryzen 9 3900X scores 19,000 in Cinebench R23 multi-core, which is 28.6% higher than the Intel Core Ultra 5 235's score of 14,769. This is the largest multi-core win for the AMD part outside of the older R15 test.

Q: What is the biggest performance gap in single-threaded workloads?

A: The Intel Core Ultra 5 235 leads by 40.1% in PassMark single-thread performance, scoring 4,516 versus the AMD Ryzen 9 3900X's 2,703. The Intel chip also leads by 34.3% in Cinebench R23 single-core, with scores of 2,085 and 1,370 respectively.

Q: Which processor supports faster memory bandwidth?

A: The Intel Core Ultra 5 235 supports DDR5 memory with a bandwidth of 102.4 GB/s, exactly double the 51.2 GB/s of the AMD Ryzen 9 3900X, which supports DDR4 memory. Both are dual-channel configurations.

Q: Do these processors have integrated graphics?

A: The Intel Core Ultra 5 235 includes Arc Xe-LPG Graphics 24EU, while the AMD Ryzen 9 3900X has no integrated graphics. This makes the Intel chip a more self-contained solution for systems without a discrete GPU.

Q: What are the launch MSRPs for these two processors?

A: The AMD Ryzen 9 3900X had a launch MSRP of $499, while the Intel Core Ultra 5 235 launched at $257.

Where Each One Wins

The AMD Ryzen 9 3900X secures 4 benchmark wins out of 15 head-to-head tests, and its victories are concentrated in multi-threaded rendering and integer-heavy tasks. The most striking result is in Cinebench R15 multi-core, where the AMD chip scores 3,049 against the Intel chip's 1,488, a 104.9% advantage. This pattern continues in Cinebench R23 multi-core (19,000 vs 14,769, a 28.6% lead) and PassMark integer math (99,628 vs 87,948, a 13.3% lead). The AMD part also wins in data compression, scoring 448,906 versus 390,711, a 14.9% margin. These results indicate the 3900X's 24 threads provide a substantial edge in workloads that scale with thread count and in legacy benchmarks that reward simultaneous multi-threading.

The Intel Core Ultra 5 235 dominates with 11 wins, and its strengths lie in single-thread performance, floating-point math, and physics simulation. The most significant gaps are in PassMark floating-point math, where the Intel chip scores 117,951 versus 58,434, a massive 50.5% advantage, and PassMark find prime numbers, where it scores 371 versus 214, a 42.3% lead. The Intel part also wins PassMark single-thread by 40.1% (4,516 vs 2,703) and PassMark physics by 30.2% (2,570 vs 1,794). In multi-thread performance, the Intel chip still manages a win in PassMark multithread, scoring 37,816 versus 32,544, a 13.9% lead, suggesting its higher clock speeds and newer architecture compensate for fewer threads in some scenarios. The Intel part also edges out wins in data encryption (29,293 vs 28,586), extended instructions (32,752 vs 29,221), and random string sorting (48,980 vs 48,300), though these margins are smaller.

Architecture Differences

The architectural divide is substantial. The AMD Ryzen 9 3900X is built on Zen 2 architecture with the codename Matisse, fabricated on a 7 nm process at TSMC. It uses a chiplet design with a die size of 2x 74 mm² and contains 7,600 million transistors. The Intel Core Ultra 5 235 uses Arrow Lake architecture with the codename Arrow Lake-S, fabricated on a 3 nm process at TSMC, with a monolithic die size of 243 mm² and 17,800 million transistors. This represents a significant jump in transistor density and a shift in design philosophy.

Cache hierarchies also differ fundamentally. The AMD part has 64 KB of L1 cache per core, 512 KB of L2 cache per core, and 64 MB of shared L3 cache. The Intel part has 192 KB of L1 cache per core, 3 MB of L2 cache per core, and only 24 MB of shared L3 cache. While the Intel chip has larger per-core L1 and L2 caches, the AMD chip's 64 MB L3 cache is nearly three times larger, which benefits workloads with large working sets that need to be shared across cores.

The core configurations are also distinct. The AMD Ryzen 9 3900X has 12 cores and 24 threads, relying on simultaneous multi-threading to double its thread count. The Intel Core Ultra 5 235 has 14 cores but only 14 threads, with no hyper-threading. The Intel chip compensates with higher clock speeds: a base clock of 3.40 GHz and a boost clock of 5.00 GHz, compared to the AMD chip's 3.80 GHz base and 4.60 GHz boost. The Intel chip also features integrated Arc Xe-LPG Graphics 24EU, while the AMD part has none.

Specification Differences

The two processors differ across nearly every major specification category. The AMD Ryzen 9 3900X operates at a TDP of 105 watts, while the Intel Core Ultra 5 235 is rated at 65 watts. The AMD chip uses the AMD Socket AM4 platform, while the Intel chip uses Intel Socket 1851. Memory support diverges completely: the AMD part uses DDR4 with 51.2 GB/s bandwidth, while the Intel part uses DDR5 with 102.4 GB/s bandwidth. PCIe connectivity also differs, with the AMD chip supporting Gen 4 with 24 lanes (CPU only) versus the Intel chip's Gen 5 with 20 lanes (CPU only).

The Intel Core Ultra 5 235 has a higher boost clock (5.00 GHz vs 4.60 GHz) but a lower base clock (3.40 GHz vs 3.80 GHz). The AMD chip has more threads (24 vs 14) and a larger L3 cache (64 MB vs 24 MB). The Intel chip has a smaller process node (3 nm vs 7 nm), more transistors (17,800 million vs 7,600 million), and a larger die (243 mm² vs 2x 74 mm²). The AMD chip has an unlocked multiplier, while the Intel chip is locked. The release dates are also far apart: the AMD part launched on 2019-07-06, while the Intel part launched on 2025-01-06.

Head-to-Head Benchmarks

The biggest win for the AMD Ryzen 9 3900X is in Cinebench R15 multi-core, where it scores 3,049 against the Intel Core Ultra 5 235's 1,488, a 104.9% difference. This is an outlier compared to other multi-core tests, suggesting the older benchmark is particularly sensitive to raw thread count. In Cinebench R23 multi-core, the AMD chip wins by 28.6% (19,000 vs 14,769), which is a more moderate but still decisive margin. The AMD part also wins PassMark integer math by 13.3% (99,628 vs 87,948) and PassMark data compression by 14.9% (448,906 vs 390,711). These wins indicate that the 3900X's 24 threads provide a consistent advantage in integer and compression workloads that scale with parallelism.

The Intel Core Ultra 5 235's largest win is in PassMark floating-point math, where it scores 117,951 versus 58,434, a 50.5% advantage. This is followed by PassMark find prime numbers, where the Intel chip scores 371 versus 214, a 42.3% lead. In PassMark single-thread, the Intel chip scores 4,516 versus 2,703, a 40.1% lead, and in Cinebench R23 single-core, it scores 2,085 versus 1,370, a 34.3% lead. The Intel chip also wins PassMark physics by 30.2% (2,570 vs 1,794) and PassMark multithread by 13.9% (37,816 vs 32,544).

The remaining wins for the Intel chip are narrower. In PassMark extended instructions, the Intel part scores 32,752 versus 29,221, a 10.8% lead. In PassMark data encryption, the Intel part scores 29,293 versus 28,586, a 2.4% lead. In PassMark random string sorting, the Intel part scores 48,980 versus 48,300, a 1.4% lead. In Cinebench R15 single-core, the Intel part scores 210 versus 207, a 1.4% lead. These smaller margins show that while the Intel chip wins more tests, the AMD chip remains competitive in tasks that are less dependent on clock speed and more dependent on thread parallelism. The overall picture is one of a generational shift: the Intel Core Ultra 5 235 leverages its newer architecture, higher clocks, and faster memory to win in modern workloads, while the AMD Ryzen 9 3900X leverages its thread count to hold ground in legacy multi-threaded benchmarks.