AMD Ryzen 7 5800H vs Intel Core Ultra 7 266V Comparison

The Intel Core Ultra 7 266V and AMD Ryzen 7 5800H are both 8-core mobile processors that land in the same performance tier, with average benchmark scores of 23297 and 23277 respectively. The Intel part edges ahead by a razor-thin 0.1% overall, but the two chips achieve that parity through completely different philosophies: Lunar Lake relies on a advanced 3nm process and high single-core clocks, while Cezanne leverages 16 threads and a larger cache on a mature 7nm node. The data shows a fascinating split where each processor dominates entirely different workload categories, making the choice highly dependent on what software you actually run.

FAQ

Q: Which processor has the higher overall average benchmark score?

A: The Intel Core Ultra 7 266V posts an average benchmark score of 23297, which is just 0.1% higher than the AMD Ryzen 7 5800H’s 23277. Both sit at the 76th percentile among all CPUs, placing them in the same performance bracket.

Q: How do they compare in single-threaded performance?

A: Intel wins decisively in single-core tests. The Core Ultra 7 266V scores 3943 in Passmark single-thread versus 3021 for the Ryzen 7 5800H, a 30.5% advantage. In Cinebench R23 single-core, the margin grows to 64.9% (2335 vs 1416).

Q: Which chip wins in multi-threaded workloads?

A: It depends on the test. The Ryzen 7 5800H wins Cinebench R15 multicore (2005 vs 1667, a 16.9% margin) and Passmark multithread (20789 vs 19461, a 6.4% margin). However, the Intel chip wins Cinebench R23 multicore decisively at 16544 vs 12091.5, a 36.8% advantage.

Q: What are the core and thread configurations?

A: Both have 8 physical cores, but the AMD Ryzen 7 5800H supports 16 threads via SMT, while the Intel Core Ultra 7 266V has only 8 threads with no hyperthreading. This gives AMD a theoretical throughput advantage in heavily threaded workloads.

Q: How does the integrated graphics compare?

A: The Intel Core Ultra 7 266V features Arc 140V graphics, while the AMD Ryzen 7 5800H uses Radeon Vega 8. The benchmark data does not include direct GPU tests, but the Intel part’s newer architecture suggests a different graphics capability profile.

Q: Which processor is more power-efficient?

A: The Intel Core Ultra 7 266V has a TDP of 17 watts versus 45 watts for the AMD Ryzen 7 5800H. This substantial difference indicates the Intel chip is designed for much lower power envelopes, though the performance data shows it can still match or beat AMD in several tests.

Architecture Differences

The two processors represent fundamentally different design eras and philosophies. The Intel Core Ultra 7 266V is built on Lunar Lake architecture using a 3nm process from TSMC, while the AMD Ryzen 7 5800H uses Zen 3 architecture on TSMC’s 7nm node. This process gap explains why Intel can achieve similar or better performance at a fraction of the power draw.

Cache configurations diverge significantly. Intel allocates 192 KB of L1 cache per core and 2.5 MB of L2 per core, with 12 MB of shared L3. AMD counters with 64 KB of L1 per core, 512 KB of L2 per core, and a larger 16 MB shared L3 pool. The AMD chip also has a much larger transistor count at 10,700 million spread across a 180 mm² die, though Intel does not disclose its transistor count or die size.

Memory support differs completely. The Intel part uses LPDDR5X with bandwidth up to 136.5 GB/s, while the AMD chip uses DDR4 with 68.3 GB/s maximum bandwidth. Both use dual-channel memory buses. PCIe connectivity also separates them: Intel provides Gen 5 with 4 CPU lanes, while AMD is limited to Gen 3.

The Intel Core Ultra 7 266V has a base clock of 2.20 GHz and boosts to 5.00 GHz, compared to AMD’s 3.20 GHz base and 4.40 GHz boost. This higher boost clock on Intel explains its single-core dominance. The AMD chip’s higher base clock helps in sustained multi-threaded loads where all cores are active.

Where Each One Wins

The Intel Core Ultra 7 266V wins 8 of the 15 head-to-head benchmarks, establishing clear dominance in single-threaded and floating-point workloads. Its biggest victories come in Cinebench R23 single-core (64.9% ahead), Passmark physics (93.7% ahead), and Passmark find prime numbers (289.8% ahead). The chip also wins floating-point math by 28% and single-thread tests by 30.5%. This makes it the superior choice for applications that rely on per-core performance, such as legacy software, lightly threaded games, and scientific calculations with high precision demands.

The AMD Ryzen 7 5800H wins 7 benchmarks, focusing on integer-heavy and data-processing tasks. Its most significant victories include Passmark integer math (48.6% ahead at 80786 vs 41558), data compression (30.9% ahead), and data encryption (18.5% ahead). The AMD chip also wins extended instructions by 12.5%, random string sorting by 18.6%, and multithread by 6.4%. The extra 8 threads from SMT clearly help in these parallel integer workloads, making AMD the better option for file compression, encryption tasks, and general productivity that scales with thread count.

Specification Differences

The core specifications show clear divergence in almost every category. Both have 8 cores, but the AMD Ryzen 7 5800H has 16 threads versus 8 on the Intel Core Ultra 7 266V. Base clocks differ substantially: AMD runs at 3.20 GHz while Intel sits at 2.20 GHz. Boost clocks invert the relationship, with Intel reaching 5.00 GHz versus AMD’s 4.40 GHz.

TDP is the most dramatic difference: Intel is rated at 17 watts while AMD requires 45 watts. This nearly 3x power gap suggests very different thermal and battery life characteristics in laptops.

Process nodes and architectures are generations apart. Intel uses 3nm Lunar Lake, AMD uses 7nm Zen 3 (Cezanne). Cache layouts differ across all levels, with AMD offering a larger L3 (16 MB vs 12 MB) but smaller L1 and L2 per core. Memory support favors Intel with LPDDR5X at 136.5 GB/s bandwidth versus AMD’s DDR4 at 68.3 GB/s. PCIe generations also separate them: Intel Gen 5, AMD Gen 3.

Sockets are incompatible: Intel BGA 2833 versus AMD Socket FP6. The Intel part was released on 2024-09-23, while the AMD chip launched on 2021-01-11. Both are active in production and use integrated graphics (Arc 140V vs Radeon Vega 8).

Head-to-Head Benchmarks

The benchmark results tell a story of two very different optimizations. Starting with Cinebench R15, AMD wins multicore at 2005 vs 1667, a 16.9% margin that reflects its thread advantage. But the single-core picture flips immediately: Intel wins 235 vs 229, a slim 2.6% edge that hints at the bigger gap to come.

Cinebench R23 reveals Intel’s modern architecture advantage. In multicore, Intel scores 16544 versus AMD’s 12091.5, a massive 36.8% win despite having half the threads. This suggests Lunar Lake’s efficiency cores and higher clocks overcome the thread deficit in this particular workload. Single-core is even more lopsided: 2335 vs 1416, a 64.9% advantage for Intel.

Passmark results show the workload-dependent split clearly. AMD dominates integer math at 80786 vs 41558, a 48.6% margin, and data compression at 270608 vs 187050, a 30.9% edge. Intel counters with a 289.8% win in find prime numbers (191 vs 49), a 93.7% win in physics (1608 vs 830), and a 28% win in floating-point math (56923 vs 44479).

The multithread test goes to AMD narrowly at 20789 vs 19461, a 6.4% margin. Single-thread goes to Intel decisively at 3943 vs 3021, a 30.5% margin. Intermediate tests like data encryption (AMD by 18.5%), extended instructions (AMD by 12.5%), and random string sorting (AMD by 18.6%) all favor the Ryzen part, reinforcing its strength in data-heavy integer workloads.

The Verdict

The data presents a clear choice based on workload priorities. The Intel Core Ultra 7 266V is the pick for users who value single-threaded responsiveness, floating-point computation, and power efficiency. Its 30.5% single-thread lead, 64.9% Cinebench R23 single-core margin, and 17-watt TDP make it ideal for thin-and-light laptops where battery life matters and applications favor per-core speed. The 93.7% physics win and 289.8% prime number advantage also suggest strong performance in simulation and number-crunching tasks.

The AMD Ryzen 7 5800H is the better choice for integer-heavy, parallel workloads that can use its 16 threads. The 48.6% integer math lead, 30.9% data compression advantage, and 18.5% encryption edge make it a strong performer for compression tools, data processing, and multi-threaded productivity. Its higher 45-watt TDP means it belongs in larger laptops with better cooling, but the performance payoff in these specific tasks is substantial.

For general use, the processors are essentially tied at a 0.1% average benchmark difference. The deciding factor should be software compatibility and workload mix. If you run modern, well-optimized applications that leverage high single-core clocks, the Intel chip wins. If your work involves batch processing, file archiving, or encryption, the AMD chip delivers measurable gains. Both sit at the 76th percentile among all CPUs, so neither is a slouch — but they excel in opposite directions.