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

The Intel Core Ultra 5 235A and AMD Ryzen 9 3900 represent two distinct eras of desktop computing, yet they land within a fraction of a percent of each other in overall average benchmark score. The data shows the Intel part edges out the AMD processor with an average score of 48,201 versus 47,918, a delta of just 0.6%. Both CPUs sit at the 90th percentile among all processors tested. The head-to-head results, however, are far from a tie, with the Intel chip securing 11 wins against the AMD part’s 2, often by dramatic margins.

Head-to-Head Benchmarks

The most striking divergence appears in single-threaded and lightly-threaded workloads. In Cinebench R15 single-core, the Intel Core Ultra 5 235A scores 464 against the Ryzen 9 3900’s 197, a staggering 135.5% advantage. This pattern repeats in PassMark’s single-thread test, where Intel posts 4,557 points versus AMD’s 2,604, a 75% lead. The gap is not merely academic; it indicates a fundamental difference in per-core efficiency and clock-speed execution between Arrow Lake and Zen 2 architectures.

Floating-point math is another area of total dominance for the Intel chip. The Core Ultra 5 235A scores 118,778 in PassMark’s floating-point test, more than double the Ryzen 9 3900’s 56,730, translating to a 109.4% advantage. Similarly, in the find-prime-numbers test, Intel’s score of 392 nearly doubles AMD’s 203, a 93.1% lead. The physics test shows a 50.7% win for Intel (2,437 vs. 1,617), and extended instructions favor Intel by 21.3% (31,625 vs. 26,073). Even in memory-sensitive random string sorting, Intel leads by 10.2% (49,489 vs. 44,902).

Multi-threaded performance tells a more balanced story, though Intel still comes out ahead. In Cinebench R15 multi-core, the Core Ultra 5 235A scores 3,289 versus 2,804 for the Ryzen 9 3900, a 17.3% win. The PassMark multi-thread test shows Intel at 38,392 against AMD’s 30,586, a 25.5% margin. Data encryption also favors Intel, with scores of 30,136 and 26,657 respectively, a 13.1% difference.

The AMD Ryzen 9 3900 does secure two victories, both in integer-heavy workloads. In PassMark integer math, AMD scores 97,698 against Intel’s 88,626, a 9.3% advantage. The other win comes in data compression, where AMD posts 413,887 versus Intel’s 393,800, a 4.9% lead. These results suggest that despite its older architecture, the Ryzen 9 3900’s 24 threads can still marshal significant throughput in specific parallel integer tasks. However, these wins are isolated and do little to offset Intel’s overwhelming dominance in the other 11 benchmarks.

The Verdict

The data points to a clear winner for most users. The Intel Core Ultra 5 235A is the superior processor in the vast majority of tested workloads, particularly those that rely on single-thread speed, floating-point math, and modern instruction efficiency. Its 75% lead in single-thread performance and 109.4% lead in floating-point math make it the obvious choice for applications like scientific computing, financial modeling, or any workflow where per-core speed is paramount. The 135.5% advantage in Cinebench R15 single-core further underscores that the Arrow Lake architecture simply executes instructions far faster than Zen 2.

The Ryzen 9 3900, despite having 24 threads versus Intel’s 14, only manages to outperform in two specific integer tests. Its 9.3% win in integer math and 4.9% win in data compression are real but narrow, and they come in workloads where raw thread count can compensate for slower individual cores. For a user whose primary application is heavy integer parallel processing or compression tasks, the Ryzen 9 3900 still has merit. However, the overall average benchmark score of 47,918 versus 48,201, coupled with the sheer number of benchmark losses, indicates that the older AMD chip is outclassed in general-purpose computing.

Given that both processors share the same 65W TDP, the Intel Core Ultra 5 235A delivers its superior performance without a power penalty. The launch MSRP of the Intel part is $269, while the AMD part launched at $499, though pricing considerations are separate from performance analysis. The verdict is straightforward: for single-threaded responsiveness, modern application performance, and most multi-threaded tasks, the Intel Core Ultra 5 235A is the data-backed choice. The Ryzen 9 3900 is only defensible for niche integer-heavy workloads where its 24 threads can be fully utilized.

FAQ

Q: How much faster is the Intel Core Ultra 5 235A in single-core performance?

A: In Cinebench R15 single-core, the Intel chip scores 464 versus 197 for the AMD Ryzen 9 3900, a 135.5% advantage. PassMark single-thread shows a 75% lead (4,557 vs. 2,604).

Q: Does the AMD Ryzen 9 3900 win any benchmarks?

A: Yes, it wins 2 out of 13 head-to-head tests: PassMark integer math (97,698 vs. 88,626, a 9.3% advantage) and PassMark data compression (413,887 vs. 393,800, a 4.9% advantage).

Q: Which processor has more cores and threads?

A: The AMD Ryzen 9 3900 has 12 cores and 24 threads, while the Intel Core Ultra 5 235A has 14 cores and 14 threads. The Intel part does not support simultaneous multithreading.

Q: What is the overall average benchmark score difference?

A: The Intel Core Ultra 5 235A averages 48,201 points, while the AMD Ryzen 9 3900 averages 47,918 points, a difference of 0.6% in favor of Intel. Both are at the 90th percentile.

Q: Which processor has a higher boost clock?

A: The Intel Core Ultra 5 235A boosts to 5.00 GHz, while the AMD Ryzen 9 3900 boosts to 4.30 GHz. The Intel part also has a higher base clock at 3.40 GHz versus 3.10 GHz.

Q: How does the Intel chip achieve such a large win in floating-point math?

A: The Intel Core Ultra 5 235A scores 118,778 in PassMark floating-point math against 56,730 for the AMD Ryzen 9 3900, a 109.4% advantage. This is likely due to the newer Arrow Lake architecture’s improved execution units and higher clock speeds.

Specification Differences

The two processors differ in nearly every fundamental specification. The Intel Core Ultra 5 235A uses 14 cores with 14 threads, while the AMD Ryzen 9 3900 offers 12 cores with 24 threads due to SMT. Base clocks are 3.40 GHz for Intel and 3.10 GHz for AMD, with boost clocks of 5.00 GHz and 4.30 GHz respectively.

Memory support is split across generations: the Intel part supports DDR5 with a dual-channel bus and 102.4 GB/s bandwidth, whereas the AMD part supports DDR4 with a dual-channel bus and 51.2 GB/s bandwidth. This gives Intel a 2x theoretical memory bandwidth advantage. PCIe support also differs, with Intel offering Gen 5 with 20 lanes (CPU only) and AMD offering Gen 4 with 24 lanes (CPU only).

The Intel Core Ultra 5 235A includes integrated Arc Xe-LPG Graphics with 24 execution units, while the AMD Ryzen 9 3900 has no integrated graphics. The Intel part is multiplier-locked, while the AMD part has an unlocked multiplier for overclocking. Their part numbers are SRWPN and 100-000000070, respectively.

Architecture Differences

The architectural gap between these processors is vast. The Intel Core Ultra 5 235A is built on Arrow Lake-S, using a 3nm process node from TSMC with 17,800 million transistors on a 243 mm² die. In contrast, the AMD Ryzen 9 3900 uses the Zen 2 architecture on a 7nm node, also from TSMC, with 7,600 million transistors split across two 74 mm² dies.

Cache hierarchy differences are significant. The Intel chip offers 192 KB of L1 cache per core and 3 MB of L2 cache per core, with a shared 24 MB L3 cache. The AMD part has 64 KB of L1 per core and 512 KB of L2 per core, but boasts a larger 64 MB L3 cache. This means AMD has more total L3, but Intel’s per-core L2 is substantially larger.

The Core Ultra 5 235A is part of the Core Ultra Series 2 and uses the Intel Socket 1851, while the Ryzen 9 3900 belongs to the 3000 series and uses the AMD Socket AM4. The Intel part’s release date is in 2025, whereas the AMD part launched in 2019. Neither processor supports ECC memory. The Intel chip uses the Arrow Lake-S codename, while the AMD chip uses Matisse. These architectural differences explain the massive performance deltas, particularly in single-threaded and floating-point workloads, where the newer 3nm process and higher clocks give Intel a decisive edge.