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

FAQ

Q: How do the core and thread counts differ between the AMD Ryzen Embedded 9900X and the Intel Core Ultra 7 366H?

A: The AMD Ryzen Embedded 9900X uses 12 cores with 24 threads, while the Intel Core Ultra 7 366H uses 16 cores with 16 threads. The AMD part relies on simultaneous multithreading to double its thread count, whereas the Intel part has more physical cores but no thread doubling.

Q: Which processor has the higher boost clock?

A: The AMD Ryzen Embedded 9900X boosts up to 5.60 GHz, which is 0.80 GHz higher than the Intel Core Ultra 7 366H's 4.80 GHz boost. The AMD part also has a much higher base clock at 4.40 GHz versus 2.00 GHz for the Intel.

Q: What is the process node and foundry for each chip?

A: The AMD Ryzen Embedded 9900X is built on a 4 nm process at TSMC with a Granite Ridge codename. The Intel Core Ultra 7 366H is built on a 3 nm process at Intel with a Panther Lake codename.

Q: How much L3 cache does each processor have?

A: The AMD Ryzen Embedded 9900X has 64 MB of L3 cache, while the Intel Core Ultra 7 366H has 18 MB of shared L3 cache. The Intel part has larger per-core L1 and L2 caches: 192 KB L1 per core and 2.5 MB L2 per core versus 80 KB L1 and 1 MB L2 per core for the AMD.

Q: What memory bandwidth does each processor support?

A: The Intel Core Ultra 7 366H supports dual-channel DDR5 and LPDDR5X memory with a bandwidth of 115.2 GB/s. The AMD Ryzen Embedded 9900X supports dual-channel DDR5 with a bandwidth of 89.6 GB/s. The Intel part also lacks ECC memory support, while the AMD part supports ECC.

Q: What is the market segment and socket for each?

A: The AMD Ryzen Embedded 9900X is a desktop processor on AMD Socket AM5 with an unlocked multiplier. The Intel Core Ultra 7 366H is a mobile processor on Intel BGA 2540 with a locked multiplier. The AMD part uses Gen 5 PCIe with 24 CPU lanes, while the Intel part uses Gen 5 with 12 CPU lanes.

Where Each One Wins

The benchmark data shows a clear split in workload strengths. The Intel Core Ultra 7 366H dominates the recorded Cinebench and PassMark results across both multi-threaded and single-threaded tests. In Cinebench R23 multi-core, the Intel chip scores 28,477, while the AMD Ryzen Embedded 9900X has no recorded benchmark scores in the database. The Intel part also leads in Cinebench R20 multi-core with 11,960 and Cinebench R15 multi-core with 2,870. For single-core performance, the Intel processor records 4,020 in Cinebench R23, 1,688 in Cinebench R20, and 405 in Cinebench R15.

In PassMark workloads, the Intel Core Ultra 7 366H delivers strong results in data compression with 327,455 points, data encryption with 25,845, extended instructions with 26,901, floating point math with 103,615, and integer math with 83,695. The multi-thread PassMark score for the Intel part is 33,429, with a single-thread score of 4,043. The AMD Ryzen Embedded 9900X has no benchmark entries in the database, meaning all recorded wins in this head-to-head comparison go to the Intel processor.

The AMD part does hold structural advantages that the Intel chip cannot match: 24 threads versus 16, a 64 MB L3 cache, ECC memory support, an unlocked multiplier, and 24 PCIe Gen 5 lanes. These are architectural wins, not benchmark wins. For measured performance, the Intel Core Ultra 7 366H is the only chip with recorded scores, and it occupies the 87th percentile against all CPUs in the database.

Architecture Differences

The two processors come from fundamentally different design philosophies. The AMD Ryzen Embedded 9900X belongs to the 9000 series and uses the Zen 5 architecture on the Granite Ridge codename. It is built on a 4 nm process at TSMC and packages 16,630 million transistors across a die size of 2x 70.6 mm². The Intel Core Ultra 7 366H belongs to the Core Ultra Series 3 and uses the Panther Lake architecture, built on a 3 nm process at Intel with no transistor or die size data recorded.

Cache hierarchy differs significantly between the two. The AMD part allocates 80 KB of L1 per core and 1 MB of L2 per core, with a shared 64 MB L3 pool. The Intel part allocates 192 KB of L1 per core and 2.5 MB of L2 per core, with a much smaller 18 MB shared L3. The AMD design favors a larger last-level cache for data reuse across 12 cores, while the Intel design gives each core more private cache. The AMD processor supports ECC memory, which the Intel processor does not.

The integrated graphics also differ: the AMD Ryzen Embedded 9900X uses Radeon Graphics, while the Intel Core Ultra 7 366H uses Intel Xe3 Graphics. The PCIe configurations are another divider, with the AMD part providing 24 Gen 5 lanes from the CPU and the Intel part providing 12 Gen 5 lanes. The AMD chip has an unlocked multiplier for overclocking, while the Intel chip is locked. The AMD processor was released on October 6, 2025, and the Intel processor was released on January 4, 2026.

Specification Differences

The core configuration is the first major difference: 12 cores and 24 threads for AMD versus 16 cores and 16 threads for Intel. The AMD chip's base clock of 4.40 GHz is substantially higher than the Intel chip's 2.00 GHz base, and the boost clock of 5.60 GHz versus 4.80 GHz gives AMD a 0.80 GHz advantage at peak. Thermal design power differs sharply: the AMD part is rated at 120 watts, while the Intel part is rated at 25 watts, reflecting the desktop versus mobile market split.

Memory support shows the Intel part accepting both DDR5 and LPDDR5X, while the AMD part only lists DDR5. Both use dual-channel memory buses, but the Intel part achieves 115.2 GB/s bandwidth versus 89.6 GB/s for the AMD part. ECC memory is supported only on the AMD chip. The process node favors Intel at 3 nm versus 4 nm for AMD, and the foundries differ accordingly: Intel for the Core Ultra 7 366H, TSMC for the Ryzen Embedded 9900X.

The socket and market segment are opposites: AMD Socket AM5 for desktop use versus Intel BGA 2540 for mobile use. The multiplier is unlocked on the AMD part and locked on the Intel part. Part numbers are 100-000000662E for AMD and SA4R9Q9EL for Intel. The production status for both is Active. Neither chip has a recorded launch MSRP in the database.

Head-to-Head Benchmarks

The head-to-head comparison is one-sided because the AMD Ryzen Embedded 9900X has no benchmark entries in the database. The Intel Core Ultra 7 366H carries all recorded scores, and its average benchmark score is 41,263. Its nearest rivals give context for where this performance sits: the Intel Core Ultra 7 356H scores 41,215, a 0.1% difference; the AMD Ryzen AI 5 PRO 440 scores 41,208, also a 0.1% difference; the AMD Ryzen 9 5900X scores 41,376, putting the 366H 0.3% behind; and the Intel Core Ultra X7 358H scores 40,967, with the 366H 0.7% ahead.

The Cinebench results for the Intel chip show a multi-core score of 28,477 in R23, 11,960 in R20, and 2,870 in R15. Single-core results are 4,020 in R23, 1,688 in R20, and 405 in R15. PassMark results break down by workload: data compression at 327,455, data encryption at 25,845, extended instructions at 26,901, prime number finding at 326, floating point math at 103,615, integer math at 83,695, multi-thread at 33,429, physics at 2,880, random string sorting at 39,814, and single-thread at 4,043.

The percentile placement of the Intel chip is 87 against all CPUs, which places it well above the AMD Ryzen Embedded 9900X's percentile of 50. The AMD part has an average benchmark score of 0 and no rival data, so no direct delta percentages can be calculated for it. The database records no head-to-head benchmark entries between these two processors. The Intel chip's 16 physical cores without hyperthreading still produce a multi-thread PassMark score of 33,429, and its single-thread PassMark score of 4,043 reflects the 4.80 GHz boost clock.

The Verdict

The recorded data supports a clear choice for measured performance: the Intel Core Ultra 7 366H. It holds the 87th percentile against all CPUs, has an average benchmark score of 41,263, and delivers strong Cinebench and PassMark results across every recorded workload. The AMD Ryzen Embedded 9900X has no benchmark scores in the database, placing it at the 50th percentile with an average score of 0. For any workload that relies on the measured Cinebench or PassMark metrics, the Intel processor is the only option with data to support it.

The AMD Ryzen Embedded 9900X still leads in structural specifications. It offers 24 threads versus 16, a 64 MB L3 cache versus 18 MB, ECC memory support, an unlocked multiplier, 24 PCIe Gen 5 lanes, and a higher boost clock of 5.60 GHz. These features matter for configurations that require ECC validation, overclocking, or extensive PCIe expansion. The 120 watt TDP and desktop socket indicate a different use case than the 25 watt mobile Intel chip.

The architecture comparison favors each chip in different areas. The AMD part uses a 4 nm TSMC process with 16,630 million transistors and a 2x 70.6 mm² die size, while the Intel part uses a 3 nm Intel process with no transistor data recorded. The AMD chip has a larger L3 cache but smaller per-core L1 and L2 caches. The Intel chip has a larger memory bandwidth at 115.2 GB/s and supports LPDDR5X in addition to DDR5.

The nearest rival data for the Intel Core Ultra 7 366H shows it sits within 0.7% of four comparable processors. It is 0.3% behind the AMD Ryzen 9 5900X, 0.1% behind the Intel Core Ultra 7 356H and the AMD Ryzen AI 5 PRO 440, and 0.7% ahead of the Intel Core Ultra X7 358H. This clustering indicates the 366H performs in line with its immediate competitors, with no large performance gap in either direction.

For buyers who need recorded benchmark performance in Cinebench or PassMark workloads, the Intel Core Ultra 7 366H is the processor with verifiable results. For buyers who need ECC memory, an unlocked multiplier, a larger L3 cache, or more PCIe lanes, the AMD Ryzen Embedded 9900X has the specification-level advantages, though its actual benchmark performance remains unmeasured in the database. The choice depends entirely on whether the requirement is recorded multi-threaded and single-threaded performance or specific platform features like ECC and overclocking support.