AMD Ryzen 9 9900X vs Intel Core Ultra 7 366H Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive overall win for the AMD Ryzen 9 9900X, which takes 13 of the 15 shared benchmarks. The Intel Core Ultra 7 366H manages two wins, both in single-core Cinebench tests, but the magnitude of AMD's multi-threaded and integer workload victories is substantial.

The largest delta in the entire comparison comes in PassMark integer math, where the Ryzen 9 9900X scores 181056 against 83695 for the Intel part. That is a 116.3% advantage, more than double the throughput. Data compression follows a similar pattern: AMD records 683579 versus 327455, a 108.8% lead. Extended instructions favor AMD by 105.4%, with scores of 55243 and 26901 respectively. These three workloads are the clearest demonstrations of the desktop processor's raw compute advantage.

Multi-core rendering shows a narrower but still significant gap. In Cinebench R23 multi-core, the Ryzen 9 9900X posts 32172 against 28477 for the Core Ultra 7 366H, a 13% edge. The older Cinebench R15 multi-core test shows a much larger 74.5% delta, with AMD at 5008 and Intel at 2870. PassMark multi-thread also favors AMD by 63.5%, 54643 to 33429.

The Intel Core Ultra 7 366H takes its two wins in single-core rendering. In Cinebench R23 single-core, Intel scores 4020 against 2253 for AMD, which is a 44% advantage. Cinebench R15 single-core goes Intel's way by 12.8%, 405 versus 353. These are the only benchmarks where the mobile chip leads, and they point to a genuine single-thread clock-for-clock strength, but the rest of the field is heavily AMD.

Other AMD wins include random string sorting at 80.9% ahead (72013 versus 39814), PassMark single-thread at 15.6% (4672 versus 4043), floating point math at 15.9% (120083 versus 103615), physics at 17.4% (3381 versus 2880), prime number finding at 33.7% (436 versus 326), and data encryption at 29.3% (33421 versus 25845). The average benchmark score tells the same story: AMD at 57498, Intel at 41263. AMD also ranks at the 92nd percentile among all CPUs, while Intel sits at the 87th percentile. In the nearest rival tables, AMD's average score sits within 1.4% of several server-class parts, including the Intel Xeon Platinum 8260M, while Intel's closest rival is the AMD Ryzen 9 5900X at a 0.3% delta.

Architecture Differences

The two processors come from opposite ends of the computing spectrum. The AMD Ryzen 9 9900X is a desktop part built on the Zen 5 architecture, codenamed Granite Ridge, and manufactured by TSMC on a 4 nm process. It uses the AMD Socket AM5 and belongs to the 9000 series. The Intel Core Ultra 7 366H is a mobile processor based on the Panther Lake architecture, made on Intel's own 3 nm process, and mounted on Intel BGA 2540. It belongs to the Core Ultra Series 3, specifically the Panther Lake-H generation.

Core configurations differ sharply. The Ryzen 9 9900X has 12 cores and 24 threads, while the Core Ultra 7 366H has 16 cores and 16 threads. The Intel part has more physical cores, but no hyperthreading, so its thread count is actually lower than AMD's. Clock speeds tell a related story: AMD's base clock is 4.40 GHz with a boost of 5.60 GHz, while Intel runs at 2.00 GHz base and 4.80 GHz boost. The higher AMD clocks contribute directly to its multi-threaded dominance.

Cache hierarchies are built differently. AMD allocates 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3. Intel uses 192 KB of L1 per core, 2.5 MB of L2 per core, and only 18 MB of shared L3. The larger L3 on the AMD side is a major factor in workloads that repeatedly access the same data, such as compression and integer sorting.

Process node and transistor count also separate the two. AMD's die is listed as 2x 70.6 mm² with 16,630 million transistors. Intel's transistor count and die size are not recorded in the database. Memory support shows both use dual-channel DDR5, but Intel also supports LPDDR5X and lists a higher memory bandwidth of 115.2 GB/s against AMD's 89.6 GB/s. AMD supports ECC memory; Intel does not. PCIe lane counts differ as well, with AMD offering 24 Gen 5 lanes from the CPU and Intel offering 12 Gen 5 lanes.

Power and thermal envelopes are dramatically different. The Ryzen 9 9900X carries a 120 W TDP, while the Core Ultra 7 366H is rated at just 25 W. That 95 W gap explains much of the performance difference: the desktop chip has far more headroom to sustain high clocks across all cores. The Intel part is clearly designed for thin-and-light mobile systems where power draw is the binding constraint.

The integrated graphics also differ. AMD pairs the CPU with Radeon Graphics, while Intel uses Intel Xe3 Graphics. AMD's multiplier is unlocked, meaning the user can overclock it; Intel's multiplier is locked. The AMD part was released on 2024-08-14, while the Intel part has a launch date of 2026-01-04. Intel's launch MSRP is not recorded in the database, so no price comparison is possible from the data.

Where Each One Wins

The Ryzen 9 9900X is the clear choice for compute-heavy desktop workloads. Its 108.8% lead in data compression and 116.3% lead in integer math make it a strong fit for file archiving, database operations, and code compilation, where integer throughput dominates. The 63.5% advantage in PassMark multi-thread and 74.5% lead in Cinebench R15 multi-core point to rendering and video encoding as natural use cases. The 13% edge in Cinebench R23 multi-core confirms that even the newest rendering engines still favor AMD. The 80.9% win in random string sorting suggests sorting algorithms and text processing run considerably faster on the desktop chip. Encryption workloads also favor AMD by 29.3%, which matters for secure file operations and VPN throughput.

The Core Ultra 7 366H wins in single-threaded Cinebench tests. Its 44% lead in R23 single-core and 12.8% lead in R15 single-core indicate a strong per-thread performance profile. That could benefit lightly threaded applications such as legacy productivity software, some CAD tools, or any program that relies on a single dominant thread. The lower TDP also makes it the only realistic option for battery-powered systems. The 25 W rating versus 120 W for AMD means the Intel part belongs in laptops where sustained all-core load is not the primary goal.

PassMark single-thread still goes to AMD by 15.6%, so Intel's single-core advantage is specific to the Cinebench workload rather than universal. The overall picture is that AMD wins the majority of measured tasks, and Intel wins a narrow slice of single-thread rendering.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 9 9900X records an average benchmark score of 57498, while the Intel Core Ultra 7 366H records 41263. AMD also ranks at the 92nd percentile among all CPUs, versus the 87th percentile for Intel.

Q: How large is the multi-core performance gap?

A: In Cinebench R23 multi-core, the Ryzen 9 9900X scores 32172 against 28477 for the Core Ultra 7 366H, a 13% lead. In Cinebench R15 multi-core, AMD leads by 74.5%, with scores of 5008 and 2870.

Q: Does the Intel chip win any benchmark?

A: Yes. The Core Ultra 7 366H wins Cinebench R23 single-core with 4020 versus 2253, a 44% advantage, and Cinebench R15 single-core with 405 versus 353, a 12.8% lead.

Q: What are the core and thread counts for each processor?

A: The AMD Ryzen 9 9900X has 12 cores and 24 threads. The Intel Core Ultra 7 366H has 16 cores and 16 threads.

Q: How do the cache configurations compare?

A: The AMD part has 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3. The Intel part has 192 KB of L1 per core, 2.5 MB of L2 per core, and 18 MB of shared L3.

Q: What is the TDP difference between the two?

A: The Ryzen 9 9900X is rated at 120 W, while the Core Ultra 7 366H is rated at 25 W. The AMD part is a desktop processor, and the Intel part is a mobile processor.

The Verdict

The data points to two very different products with little overlap in intended usage. The AMD Ryzen 9 9900X is a high-power desktop processor that dominates multi-threaded and integer workloads. It wins 13 of 15 shared benchmarks, holds a 39.3% advantage in average benchmark score, and carries a 120 W TDP that requires a substantial cooling solution. The Intel Core Ultra 7 366H is a low-power mobile chip that wins only two single-core Cinebench tests but does so with a 25 W TDP and a 4.80 GHz boost clock.

For users building a desktop system where power draw is not a concern, the Ryzen 9 9900X is the stronger performer in nearly every measured category. Its nearest rivals in the database are server-class parts such as the AMD EPYC 9015 and Intel Xeon Platinum 8260M, which confirms its placement at the high end of the desktop market. The Intel Core Ultra 7 366H, by contrast, sits close to the AMD Ryzen 9 5900X in average score, a previous-generation desktop part, which puts its performance in a lower tier despite its newer 3 nm process.

The choice between them is not about which is faster overall, because the data clearly favors AMD. It is about platform and power budget. The Ryzen 9 9900X uses the AMD Socket AM5, supports ECC memory, has an unlocked multiplier, and offers 24 Gen 5 PCIe lanes. The Core Ultra 7 366H uses Intel BGA 2540, supports DDR5 and LPDDR5X with higher memory bandwidth, and is locked. Anyone needing a mobile processor with modest power consumption should consider the Intel part. Anyone needing maximum compute throughput on a desktop should pick the AMD part. The recorded benchmark results do not suggest a scenario where the Intel chip outruns the AMD chip in heavy all-core work, but its single-core Cinebench wins and low TDP give it a clear niche.