AMD Ryzen 5 5500X3D vs Intel Core Ultra 7 366H Comparison

The AMD Ryzen 5 5500X3D and Intel Core Ultra 7 366H represent two fundamentally different approaches to processor design. The data shows a decisive performance gap across every recorded benchmark, with the Intel part claiming all 11 head-to-head wins. The average benchmark score for the Intel Core Ultra 7 366H is 41,263, placing it in the 87th percentile of all CPUs, while the AMD Ryzen 5 5500X3D records an average of 37,018, placing it in the 85th percentile.

Head-to-Head Benchmarks

The Intel Core Ultra 7 366H dominates the PassMark suite, with its largest margin coming in floating point math. The Intel chip scores 103,615 against the AMD’s 34,511, a delta of -66.7% from the AMD part’s perspective. This indicates the Intel processor delivers roughly three times the floating point throughput, a critical advantage for scientific computing, 3D rendering, and financial modeling.

The gap narrows in integer math, where Intel still leads with 83,695 versus 60,033, a 28.3% deficit for the AMD chip. This is the closest margin among the processor-intensive workloads, yet it remains a substantial and consistent advantage for Intel. The multithread score shows a similar pattern: Intel scores 33,429 against AMD’s 20,363, a 39.1% difference, reinforcing that the Intel part excels when all cores are engaged.

Single-thread performance follows the same trend. The Intel Core Ultra 7 366H records 4,043 in the single-thread test, while the AMD Ryzen 5 5500X3D manages 2,941, a 27.3% gap. This is a notable result because the AMD chip’s high boost clock of 4.00 GHz and Zen 3 architecture were designed for strong per-core performance, yet the Intel part’s higher 4.80 GHz boost clock and newer Panther Lake architecture deliver a clear win.

In data compression, Intel leads with 327,455 versus 230,392, a 29.6% advantage. The extended instructions test shows Intel at 26,901 against AMD’s 15,925, a 40.8% margin, indicating superior SIMD and vector processing capabilities. The find prime numbers test, often a proxy for pure integer throughput, shows Intel at 326 versus 170, a 47.9% lead. Random string sorting, another memory-latency-sensitive workload, favors Intel at 39,814 versus 23,675, a 40.5% gap. Even in the physics test, Intel wins with 2,880 against 2,282, a 20.8% margin, the smallest win recorded. Data encryption shows Intel at 25,845 versus 13,967, a 46% advantage, demonstrating faster cryptographic operations.

Where Each One Wins

The benchmark results show no category where the AMD Ryzen 5 5500X3D takes the lead. Every single recorded test, from integer math to compression, favors the Intel Core Ultra 7 366H. The Intel part’s wins are not marginal; they range from 20.8% to 66.7% across the board. This suggests the Intel processor is the stronger choice for any workload that relies on raw compute throughput, including video encoding, software compilation, data analysis, and multitasking.

The AMD chip’s design does offer specific strengths that are not captured in these PassMark numbers. Its 96 MB of shared L3 cache is a distinctive feature, and the data shows it competes closely with similarly positioned desktop processors. Its nearest rival, the AMD Ryzen 5 5600F, scores 36,945 with a delta of 0.2%, while the Intel Core Ultra 5 225 scores 36,938 with a delta of 0.2%. This places the Ryzen 5 5500X3D in a tight cluster of desktop and mobile chips around the 37,000 average score mark. However, against the Intel Core Ultra 7 366H, which sits in a higher performance tier alongside the Intel Core Ultra 7 356H (41,215, delta 0.1%) and the AMD Ryzen 9 5900X (41,376, delta -0.3%), the AMD chip cannot compete on raw benchmark output.

Architecture Differences

The two processors are built on entirely different platforms. The AMD Ryzen 5 5500X3D uses the Zen 3 architecture, codenamed Vermeer, on a 7 nm process from TSMC. It fits into the AMD Socket AM4, a desktop platform that supports DDR4 memory. The chip has 6 cores and 12 threads, with a base clock of 3.00 GHz and a boost clock of 4.00 GHz. Its thermal design power is 105 watts, and it uses a dual-channel memory bus with a recorded bandwidth of 51.2 GB/s. The cache hierarchy features 64 KB of L1 per core, 512 KB of L2 per core, and a large 96 MB shared L3 cache. It supports ECC memory and provides PCIe Gen 4 with 20 lanes from the CPU. It has no integrated graphics.

The Intel Core Ultra 7 366H uses the Panther Lake architecture, codenamed Panther Lake, on a 3 nm process from Intel. It is a mobile processor on the Intel BGA 2540 socket, supporting DDR5 and LPDDR5X memory. The chip has 16 cores and 16 threads, with a base clock of 2.00 GHz and a boost clock of 4.80 GHz. Its thermal design power is 25 watts, dramatically lower than the AMD chip, yet it delivers far higher performance. The memory bus is dual-channel with a much higher bandwidth of 115.2 GB/s. The cache layout differs significantly: 192 KB of L1 per core, 2.5 MB of L2 per core, and 18 MB of shared L3 cache. It does not support ECC memory and provides PCIe Gen 5 with 12 lanes from the CPU. It includes Intel Xe3 Graphics as an integrated GPU, a feature the AMD desktop chip lacks.

The core count difference is stark: 16 cores versus 6, which explains much of the multithread performance gap. However, the Intel chip also wins single-thread tests by 27.3%, meaning its per-core architecture is more efficient despite the lower base clock. The higher boost clock of 4.80 GHz and the newer 3 nm process node are likely contributors. The memory bandwidth advantage, 115.2 GB/s versus 51.2 GB/s, also plays a role in memory-intensive workloads like compression and string sorting.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core Ultra 7 366H has an average benchmark score of 41,263, while the AMD Ryzen 5 5500X3D has an average of 37,018.

Q: How much faster is the Intel chip in floating point math?

A: The Intel Core Ultra 7 366H scores 103,615 in floating point math, which is 66.7% higher than the AMD Ryzen 5 5500X3D’s 34,511.

Q: What is the core and thread count difference?

A: The AMD Ryzen 5 5500X3D has 6 cores and 12 threads, while the Intel Core Ultra 7 366H has 16 cores and 16 threads.

Q: Does the AMD chip support ECC memory?

A: Yes, the AMD Ryzen 5 5500X3D supports ECC memory, while the Intel Core Ultra 7 366H does not.

Q: Which processor has a larger L3 cache?

A: The AMD Ryzen 5 5500X3D has a 96 MB shared L3 cache, which is significantly larger than the Intel Core Ultra 7 366H’s 18 MB shared L3 cache. Despite this, the Intel chip wins all recorded cache-sensitive benchmarks.

Q: What are the thermal design power ratings?

A: The AMD Ryzen 5 5500X3D has a 105 watt TDP, while the Intel Core Ultra 7 366H has a 25 watt TDP. The Intel chip delivers higher performance at a much lower power envelope.

The Verdict

The data is unambiguous. The Intel Core Ultra 7 366H outperforms the AMD Ryzen 5 5500X3D in every single recorded benchmark, with margins ranging from 20.8% to 66.7%. The Intel chip’s 87th percentile ranking versus the AMD chip’s 85th percentile confirms its position in a higher performance class. Its nearest rivals include the AMD Ryzen 9 5900X and the Intel Core Ultra X7 358H, while the AMD chip competes with the Ryzen 5 5600F and Intel Core Ultra 5 225.

For users prioritizing raw compute performance, especially in floating point, encryption, and multithreaded workloads, the Intel Core Ultra 7 366H is the clear choice based on these measurements. Its lower TDP of 25 watts also makes it suitable for mobile platforms where power efficiency matters. The AMD Ryzen 5 5500X3D remains a capable desktop processor with a massive 96 MB L3 cache and ECC support, but the recorded data shows it cannot match the Intel part in any performance metric. The AMD chip is best considered for AM4 desktop builds where its cache size and specific platform features are valued, but benchmark results indicate the Intel processor is the superior performer across the board.