AMD Ryzen 9 9955HX vs Intel Core i9-14900KS Comparison

AMD Ryzen 9 9955HX and Intel Core i9-14900KS represent two very different philosophies in high-end computing, one a mobile power-efficient design and the other a desktop performance monster. The benchmark data shows a clear split: Intel wins the majority of the head-to-head tests with 12 wins out of 15, but the AMD chip takes 3 wins and offers a significantly different performance profile. The average benchmark scores in the database place the AMD Ryzen 9 9955HX at 91,199, which is about 12% higher than the Intel Core i9-14900KS at 81,127, despite Intel winning more individual tests. Both processors sit at the 96th percentile of all CPUs in the database, indicating top-tier performance regardless of the specific workload.

Where Each One Wins

The AMD Ryzen 9 9955HX claims victory in three distinct workload categories that highlight its architectural strengths. The most notable win comes in extended instructions, where the AMD chip scores 57,946 against Intel's 45,524, a substantial 27.3% advantage. This test typically reflects performance on specialized instruction sets, and the data shows AMD's Zen 5 architecture handles these workloads with significantly better efficiency. The AMD processor also wins in prime number finding, scoring 287 versus 244, a 17.6% lead that suggests superior integer-heavy algorithmic processing. The third win for AMD comes in the older Cinebench R15 multicore test, where it scores 5,905 against Intel's 5,140, a 14.9% advantage, which is interesting given Intel's dominance in the newer Cinebench R23 multicore test.

The Intel Core i9-14900KS dominates across the remaining 12 tests, with particularly large margins in single-core performance. In Cinebench R23 single-core, Intel scores 7,199 versus AMD's 2,174, a massive 69.8% lead. The single-core advantage carries over to Cinebench R15 single-core, where Intel scores 725 versus 336, a 53.7% lead. These are the largest deltas in the entire comparison, indicating that Intel's high clock speeds, up to 6.20 GHz boost, provide a decisive edge in lightly threaded workloads. Intel also wins in passmark single-thread with 4,815 versus 4,393, an 8.8% lead, confirming the pattern. For multi-threaded workloads, Intel takes Cinebench R23 multicore with 50,995 versus 37,159, a 27.1% advantage, and passmark multithread with 60,012 versus 56,171, a 6.4% lead. Data compression, encryption, floating-point math, physics, and random string sorting all go to Intel with margins ranging from 6.4% to 21.8%.

Architecture Differences

The AMD Ryzen 9 9955HX uses the Zen 5 architecture under the Fire Range codename, while Intel Core i9-14900KS uses Raptor Lake architecture under the Raptor Lake-R codename. The manufacturing process differs significantly: AMD uses a 4 nm process from TSMC with 16,630 million transistors across a dual-chip design of 2x 70.6 mm², while Intel uses a 10 nm process from its own foundry with a 257 mm² die size. This process advantage likely contributes to AMD's power efficiency profile, though the database records the TDP difference: AMD at 55 watts versus Intel at 150 watts.

Core configurations differ substantially. The AMD chip has 16 cores and 32 threads, while Intel has 24 cores and 32 threads, meaning Intel relies on more cores but the same thread count. Both have 80 KB of L1 cache per core, but Intel has 2 MB of L2 cache per core while AMD has 1 MB. For L3 cache, AMD provides 64 MB shared, while Intel offers 36 MB shared, giving AMD a 28 MB advantage in the last-level cache. The memory support differs as well: AMD supports DDR5 only, while Intel supports both DDR4 and DDR5, with AMD specifying 89.6 GB/s memory bandwidth in the database. AMD's PCIe implementation offers 28 Gen 5 lanes from the CPU, while Intel provides 16 Gen 5 lanes, giving AMD more expansion headroom.

Both processors feature unlocked multipliers, allowing overclocking, and both support ECC memory. The integrated graphics differ: AMD has Radeon 610M while Intel has UHD Graphics 770. The AMD processor is designed for the mobile segment using AMD Socket FL1, while Intel targets the desktop segment with Intel Socket 1700. The release dates show AMD launched on January 5, 2025, while Intel launched on March 13, 2024, making Intel the older product by nearly a year.

Head-to-Head Benchmarks

The Cinebench results reveal a fascinating split between generations of the test. In Cinebench R15 multicore, AMD wins with 5,905 versus 5,140, a 14.9% margin. However, in Cinebench R23 multicore, Intel reverses the outcome with 50,995 versus 37,159, a 27.1% lead. This suggests the newer test scales differently with the core counts, favoring Intel's 24-core design over AMD's 16 cores. Single-core results are unambiguous: Intel dominates in both Cinebench R15 (725 vs 336, 53.7% lead) and Cinebench R23 (7,199 vs 2,174, 69.8% lead). The single-core performance delta is the largest in the entire dataset, showing Intel's clock speed advantage is decisive for this workload.

The Passmark suite provides a broader view of real-world application performance. Intel wins data compression with 803,368 versus 731,998, an 8.9% lead, and data encryption with 47,717 versus 37,330, a 21.8% lead. AMD fights back with extended instructions at 57,946 versus 45,524, a 27.3% win, and prime number finding at 287 versus 244, a 17.6% win. Floating-point math goes to Intel with 153,975 versus 136,682, an 11.2% lead, while integer math is essentially a tie: Intel scores 212,644 versus AMD's 212,598, a 0% delta. Passmark multithread gives Intel a 6.4% win (60,012 vs 56,171), physics gives Intel a 19.6% win (3,381 vs 2,720), and random string sorting goes to Intel by 13.3% (89,789 vs 77,890). Single-thread performance in Passmark shows Intel ahead by 8.8% (4,815 vs 4,393).

The Verdict

The data paints a clear picture for different use cases. The Intel Core i9-14900KS is the stronger choice for anyone prioritizing single-core performance, as it leads by margins between 8.8% and 69.8% across all single-threaded tests in the database. Its 24-core design also gives it a decisive advantage in modern multi-threaded benchmarks like Cinebench R23, where it leads by 27.1%, and it wins the majority of Passmark workload tests. The Intel processor's 6.20 GHz boost clock, compared to AMD's 5.40 GHz, appears directly correlated with these results. For users running heavily threaded rendering, data compression, encryption, or physics simulations, Intel's scores are consistently higher.

The AMD Ryzen 9 9955HX, despite having fewer cores, demonstrates superiority in specific workloads that leverage its architecture. The 27.3% lead in extended instructions and 17.6% lead in prime number finding suggest AMD's Zen 5 design processes certain instruction types more efficiently. The 14.9% win in Cinebench R15 multicore, while not replicated in R23, shows the AMD chip holds its own in certain legacy workloads. The 55 watt TDP versus Intel's 150 watt TDP also makes AMD the more power-conscious option for mobile deployments, though the database does not record performance-per-watt metrics.

The average benchmark scores favor AMD overall at 91,199 versus 81,127, a 12.4% difference, despite Intel winning 12 of 15 individual tests. This discrepancy highlights that the AMD chip's three wins include some very large margins, particularly the extended instructions test, which may carry weight in the average calculation. Both processors achieve the 96th percentile in the database, placing them among the top tier of all CPUs. Users should choose based on workload: Intel for maximum single-thread and modern multi-thread performance, AMD for specific instruction-heavy tasks and power-sensitive mobile applications.

FAQ

Q: Which processor has higher single-core performance?

A: The Intel Core i9-14900KS leads in all single-core tests. In Cinebench R23 single-core, Intel scores 7,199 versus AMD's 2,174, a 69.8% advantage. In Cinebench R15 single-core, Intel leads 725 versus 336, a 53.7% margin. Passmark single-thread shows Intel ahead with 4,815 versus 4,393, an 8.8% lead.

Q: How do the core counts compare between the two processors?

A: The Intel Core i9-14900KS has 24 cores and 32 threads, while the AMD Ryzen 9 9955HX has 16 cores and 32 threads. Both processors support the same thread count, but Intel uses more physical cores to achieve it.

Q: What is the difference in cache sizes?

A: Both processors have 80 KB of L1 cache per core. For L2 cache, Intel has 2 MB per core while AMD has 1 MB per core. For L3 cache, AMD provides 64 MB shared while Intel offers 36 MB shared, giving AMD a 28 MB advantage in the last-level cache.

Q: Which processor wins in data encryption workloads?

A: The Intel Core i9-14900KS wins in data encryption with a score of 47,717 versus AMD's 37,330, a 21.8% lead. Intel also wins data compression with 803,368 versus 731,998, an 8.9% advantage.

Q: What are the TDP ratings for each processor?

A: The AMD Ryzen 9 9955HX has a TDP of 55 watts, while the Intel Core i9-14900KS has a TDP of 150 watts. This indicates AMD's design is substantially more power-efficient on paper.

Q: In which tests does the AMD Ryzen 9 9955HX outperform Intel?

A: The AMD processor wins three tests: extended instructions (57,946 vs 45,524, a 27.3% lead), prime number finding (287 vs 244, a 17.6% lead), and Cinebench R15 multicore (5,905 vs 5,140, a 14.9% lead).