AMD Ryzen 7 9800X3D vs Intel Core Ultra 7 366H Comparison

# Head-to-Head Benchmarks

The benchmark comparison between the AMD Ryzen 7 9800X3D and the Intel Core Ultra 7 366H shows a clear split: AMD wins 10 of the 15 head-to-head tests, while Intel takes 5. The overall average benchmark score favors Intel, however, at 41263 against 39768 for AMD, a difference that reflects the heavier weighting of Intel's wins in rendering workloads.

The largest AMD victory comes in PassMark extended instructions, where the 9800X3D scores 38808 versus 26901 for the Intel part, a 44.3% advantage. Data compression shows a 42.9% gap in favor of AMD, with scores of 468017 and 327455 respectively. Physics performance also favors AMD heavily: 4083 against 2880, a 41.8% lead. Integer math delivers 116709 for AMD versus 83695 for Intel, a 39.4% edge. Prime number finding favors AMD by 29.8%, with scores of 423 and 326.

The 9800X3D also wins the multithread PassMark test at 40009 versus 33429, a 19.7% margin, and random string sorting at 48526 versus 39814, a 21.9% gap. In single-thread PassMark, AMD leads 4430 to 4043, a 9.6% advantage.

The Intel processor counters in Cinebench. The R23 single-core result is striking: Intel scores 4020 against AMD's 2080, a 48.3% lead. The R15 single-core test shows Intel ahead by 19%, with 405 versus 328. Cinebench R23 multi-core also goes to Intel, 28477 against 23230, an 18.4% margin. Floating point math favors Intel at 103615 versus 79456, a 23.3% lead. Data encryption goes to Intel as well, 25845 versus 22158, a 14.3% difference.

The Cinebench R15 multi-core test is the one rendering test AMD wins, scoring 3647 against Intel's 2870, a 27.1% margin. This inconsistency between R15 and R23 multi-core results indicates that the two processors scale differently as workload intensity increases.

# Where Each One Wins

AMD's Ryzen 7 9800X3D dominates in integer-heavy and data-processing tasks. The 44.3% lead in extended instructions and the 42.9% lead in data compression point to workloads that rely on complex instruction streams and data throughput. The 39.4% integer math advantage reinforces this pattern. Physics simulation, a workload that stresses memory access patterns and thread coordination, also falls firmly in AMD's column with a 41.8% margin.

Intel's Core Ultra 7 366H takes the rendering and floating-point side of the comparison. The 48.3% lead in Cinebench R23 single-core is the largest margin in the entire head-to-head set. This suggests that Intel's architecture delivers substantially higher per-thread performance in the rendering engine's single-threaded portions. The 23.3% floating point math lead and the 14.3% encryption advantage show that Intel's execution units handle these specific operation types more efficiently.

The multi-core rendering picture is mixed. Intel wins Cinebench R23 multi-core by 18.4%, but AMD wins Cinebench R15 multi-core by 27.1%. The R23 result aligns with the overall average benchmark score, where Intel holds a 3.8% lead. The R15 result suggests that shorter rendering bursts favor AMD, while sustained rendering workloads favor Intel.

# Architecture Differences

The two processors come from fundamentally different design philosophies. AMD's Ryzen 7 9800X3D is a desktop part built on the Zen 5 architecture, codenamed Granite Ridge, using TSMC's 4 nm process. Intel's Core Ultra 7 366H is a mobile processor based on Panther Lake architecture, fabricated on Intel's 3 nm process.

Core counts differ significantly. The AMD part has 8 cores and 16 threads, while the Intel part has 16 cores and 16 threads. This means Intel's 16 cores operate without hyperthreading, while AMD's 8 cores each support two threads. The cache hierarchy reflects these different approaches. AMD provides 80 KB of L1 cache per core, 1 MB of L2 per core, and 96 MB of shared L3 cache. Intel provides 192 KB of L1 per core, 2.5 MB of L2 per core, and only 18 MB of shared L3. AMD's 96 MB L3 is 5.3 times larger than Intel's 18 MB, which explains the data-heavy workload advantages.

Clock speeds tell a different story. AMD's base clock is 4.70 GHz with a 5.20 GHz boost, while Intel's base clock is 2.00 GHz with a 4.80 GHz boost. The power envelopes are dramatically different: AMD has a 120 W TDP, Intel has a 25 W TDP. This makes sense given the market segments, AMD is a desktop processor on socket AM5, Intel is a mobile processor on BGA 2540.

Memory support differs as well. AMD supports DDR5 with dual-channel memory and a bandwidth of 89.6 GB/s, plus ECC memory support. Intel supports both DDR5 and LPDDR5X, also dual-channel, with a higher memory bandwidth of 115.2 GB/s, but no ECC support. PCIe connectivity favors AMD with Gen 5 and 24 lanes, while Intel provides Gen 5 with 12 lanes.

The AMD processor includes Radeon Graphics as integrated graphics and has an unlocked multiplier. Intel includes Xe3 Graphics and has a locked multiplier. The transistor count and die size for the Intel part are not recorded in the database, while AMD reports 8,315 million transistors on a 70.6 mm² die.

# FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core Ultra 7 366H has an average benchmark score of 41263, which is 3.8% higher than the AMD Ryzen 7 9800X3D's average of 39768. Both processors sit at the 87th percentile compared to all CPUs in the database.

Q: How does the single-core performance compare in Cinebench R23?

A: The Intel Core Ultra 7 366H leads by a substantial 48.3% margin, scoring 4020 compared to the AMD Ryzen 7 9800X3D's 2080. This is the largest single-core gap in the entire head-to-head benchmark set.

Q: Does the AMD processor have any multi-core rendering advantage?

A: Yes, in Cinebench R15 multi-core, the AMD Ryzen 7 9800X3D scores 3647 against 2870 for the Intel part, a 27.1% lead. However, in Cinebench R23 multi-core, the Intel Core Ultra 7 366H reverses this result with a score of 28477 versus 23230, an 18.4% advantage.

Q: What is the cache size difference between these two processors?

A: The AMD Ryzen 7 9800X3D has 80 KB of L1 cache per core, 1 MB of L2 per core, and 96 MB of shared L3 cache. The Intel Core Ultra 7 366H has 192 KB of L1 per core, 2.5 MB of L2 per core, and 18 MB of shared L3 cache. AMD's L3 cache is 5.3 times larger.

Q: How do the power requirements differ?

A: The AMD Ryzen 7 9800X3D has a 120 W TDP, while the Intel Core Ultra 7 366H has a 25 W TDP. The Intel part consumes 79.2% less power according to the TDP ratings, which reflects its mobile design target.

Q: Which processor supports ECC memory?

A: Only the AMD Ryzen 7 9800X3D supports ECC memory. The Intel Core Ultra 7 366H does not include ECC support in its memory controller.

# Specification Differences

| Specification | AMD Ryzen 7 9800X3D | Intel Core Ultra 7 366H |

|----------------|---------------------|-------------------------|

| Cores | 8 | 16 |

| Threads | 16 | 16 |

| Base clock | 4.70 GHz | 2.00 GHz |

| Boost clock | 5.20 GHz | 4.80 GHz |

| TDP | 120 W | 25 W |

| Socket | AMD Socket AM5 | Intel BGA 2540 |

| Architecture | Zen 5 | Panther Lake |

| Process node | 4 nm | 3 nm |

| Foundry | TSMC | Intel |

| L1 cache | 80 KB (per core) | 192 KB (per core) |

| L2 cache | 1 MB (per core) | 2.5 MB (per core) |

| L3 cache | 96 MB (shared) | 18 MB (shared) |

| Memory support | DDR5 | DDR5, LPDDR5X |

| Memory bandwidth | 89.6 GB/s | 115.2 GB/s |

| ECC memory | Yes | No |

| PCIe | Gen 5, 24 Lanes | Gen 5, 12 Lanes |

| Integrated graphics | Radeon Graphics | Intel Xe3 Graphics |

| Market segment | Desktop | Mobile |

| Multiplier unlocked | Yes | No |

| Launch MSRP | $479 | Not recorded |

# The Verdict

The data presents two processors optimized for different environments. The AMD Ryzen 7 9800X3D is a desktop part with a 120 W TDP, 8 cores, 16 threads, and a massive 96 MB L3 cache. Its strengths are in data compression, extended instructions, integer math, and physics workloads, where it leads by margins from 19.7% to 44.3%. It also wins single-thread PassMark by 9.6%, showing that its high base clock of 4.70 GHz and boost clock of 5.20 GHz deliver real per-thread performance in general-purpose tasks.

The Intel Core Ultra 7 366H is a mobile processor with a 25 W TDP, 16 cores, 16 threads, and a smaller 18 MB L3 cache. Its advantages appear in rendering and floating-point workloads. The 48.3% lead in Cinebench R23 single-core is the defining result for this processor. It also wins multi-core rendering in R23 by 18.4%, floating point math by 23.3%, and encryption by 14.3%. The higher memory bandwidth of 115.2 GB/s, compared to 89.6 GB/s for AMD, supports its edge in bandwidth-sensitive tasks.

The average benchmark scores place Intel ahead at 41263 versus 39768, but this aggregate figure masks the workload-specific picture. For data-heavy, integer-driven, and physics-based tasks, the AMD processor is the stronger choice. For rendering, floating-point math, and encryption, the Intel processor delivers better results. The AMD part also offers ECC memory support, an unlocked multiplier, and more PCIe lanes, while the Intel part offers a lower TDP and dual memory type support.

The 87th percentile ranking for both processors indicates they occupy similar overall performance tiers in the database. The decision between them comes down to workload type and platform requirements, not overall capability. Desktop users with workloads favoring large caches and integer throughput will find the AMD processor's results compelling. Mobile users prioritizing rendering performance and power efficiency will see the Intel processor's data as the better fit.