AMD Ryzen 5 6600U vs AMD Ryzen 7 5800H Comparison

The AMD Ryzen 7 5800H and AMD Ryzen 5 6600U present a classic high-performance versus high-efficiency divide within the same manufacturer's mobile lineup. The 5800H is an 8-core, 16-thread processor from the 5000 series, while the 6600U is a 6-core, 12-thread chip from the 6000 series. Benchmark data shows a clear split: the 5800H dominates multi-threaded workloads, while the 6600U counters with modest wins in single-threaded tests. This analysis examines the head-to-head results, architectural differences, and the specific use cases where each processor holds a distinct advantage.

Head-to-Head Benchmarks

The most decisive victories for the AMD Ryzen 7 5800H come in multi-threaded workloads, where its two additional cores and four additional threads provide a substantial edge. In Cinebench R23 multicore, the 5800H scores 12,091.5 against the 6600U's 9,159.5, a 32% advantage. This margin is nearly replicated in Cinebench R15 multicore, where the 5800H's 2,005 score beats the 6600U's 1,493 by 34.3%. Geekbench multicore shows a similar trend, with the 5800H at 8,230 and the 6600U at 6,618, representing a 24.4% lead. The PassMark multithread test confirms the pattern, with the 5800H scoring 20,789 versus 17,026, a 22.1% difference.

Beyond synthetic CPU tests, the 5800H extends its dominance across various PassMark sub-tests that stress specific instruction types. In PassMark extended instructions, the 5800H scores 18,203 against 13,356, a 36.3% margin—its largest win in any benchmark. PassMark data compression shows the 5800H at 270,608 versus 201,364, a 34.4% lead, while PassMark data encryption results in a 32.7% advantage (16,962 vs 12,783). The 5800H also wins PassMark floating point math (44,479 vs 33,991) and integer math (80,786 vs 61,723), both by 30.9%. PassMark random string sorting goes to the 5800H by 32.5% (28,144 vs 21,241). Even PassMark physics, a lighter multi-threaded load, goes to the 5800H, though by a narrow 0.6% (830 vs 825).

The AMD Ryzen 5 6600U, despite its lower core count, secures wins in every single-threaded benchmark recorded. Its largest victory is in PassMark single thread, where it scores 3,132 against the 5800H's 3,021, a 3.5% advantage. Cinebench R23 singlecore shows the 6600U ahead at 1,456.5 versus 1,416, a 2.8% edge. Cinebench R15 singlecore goes to the 6600U by 1.7% (233 vs 229), and Geekbench singlecore shows a near-tie, with the 6600U at 1,673 and the 5800H at 1,669, a 0.2% difference. The 6600U also wins PassMark find prime numbers, scoring 51 versus 49, a 3.9% margin. This gives the 6600U a total of 6 wins across the 17 head-to-head tests, while the 5800H claims 11.

FAQ

Q: Which processor has the higher boost clock, and does that translate into benchmark wins?

A: The AMD Ryzen 5 6600U has a boost clock of 4.50 GHz, higher than the 5800H's 4.40 GHz. This aligns with its sweep of all single-threaded benchmark wins, including a 3.5% lead in PassMark single thread and a 2.8% lead in Cinebench R23 singlecore.

Q: How significant is the core count difference in multi-threaded performance?

A: The 5800H has 8 cores and 16 threads versus the 6600U's 6 cores and 12 threads. This translates to a 32% lead in Cinebench R23 multicore and a 34.3% lead in Cinebench R15 multicore, indicating the extra cores provide a substantial scaling benefit.

Q: Are there any benchmarks where the 6600U wins by a large margin?

A: No. The 6600U's largest win is only 3.9% in PassMark find prime numbers. All other 6600U wins are under 3.5%, including a nearly negligible 0.2% edge in Geekbench singlecore. The 5800H, by contrast, wins most tests by over 30%.

Q: What do the overall benchmark averages suggest about their relative performance tiers?

A: The 5800H has an average benchmark score of 23,277, while the 6600U averages 22,897. Both processors sit at the 76th percentile among all CPUs. The 5800H's nearest rival is the Intel Core Ultra 7 266V, with a -0.1% delta, while the 6600U's nearest rival is the AMD Ryzen 5 2600X, with a 0.3% delta.

Q: Does the 6600U's smaller process node give it any performance advantages?

A: The 6600U is built on a 6 nm process versus the 5800H's 7 nm node. While this does not appear to help in multi-threaded tests, the 6600U's consistent wins in single-threaded benchmarks suggest the newer process contributes to its higher boost clock efficiency.

Q: Which processor wins in memory-related benchmarks?

A: The head-to-head data does not include a dedicated memory benchmark. However, the 5800H wins PassMark data compression (34.4% lead) and data encryption (32.7% lead), which are memory-intensive workloads. The 6600U supports DDR5 memory with a higher theoretical bandwidth of 76.8 GB/s versus the 5800H's DDR4 at 68.3 GB/s.

The Verdict

The data directs a clear verdict based on workload priority. For any application that leverages multiple cores, the AMD Ryzen 7 5800H is the definitive choice. Its 32% to 36% leads in Cinebench multicore and PassMark extended instructions show a robust advantage that will benefit video rendering, code compilation, and other parallel tasks. The 5800H also holds a 76th percentile ranking, identical to the 6600U, but with a higher average benchmark score of 23,277 versus 22,897.

The AMD Ryzen 5 6600U is the pick for workloads that are primarily single-threaded, though the margins are small. Its 3.5% lead in PassMark single thread and 2.8% lead in Cinebench R23 singlecore are consistent but not transformative. The 6600U's wins are narrow, all under 4%, which suggests the 5800H would not significantly disappoint in these tasks either. The 6600U's lower 15-watt TDP versus the 5800H's 45-watt TDP also positions it as the more efficient option, though this is a specification difference rather than a benchmark result. Users who need maximum multi-threaded throughput should select the 5800H, while those prioritizing the highest possible single-thread performance in a lower-power package should consider the 6600U.

Specification Differences

The two processors differ in several core specifications. The AMD Ryzen 7 5800H has 8 cores and 16 threads, while the AMD Ryzen 5 6600U has 6 cores and 12 threads. Base clocks differ: the 5800H runs at 3.20 GHz, the 6600U at 2.90 GHz. Boost clocks are reversed, with the 5800H at 4.40 GHz and the 6600U at 4.50 GHz. TDP is a major differentiator, with the 5800H rated at 45 watts and the 6600U at just 15 watts. They use different sockets: the 5800H uses AMD Socket FP6, while the 6600U uses AMD Socket FP7. Memory support differs, with the 5800H using DDR4 and the 6600U using DDR5, though both are dual-channel. Memory bandwidth favors the 6600U at 76.8 GB/s versus the 5800H's 68.3 GB/s. PCIe support also differs, with the 5800H on Gen 3 and the 6600U on Gen 4 with 20 Lanes (CPU only). The integrated graphics differ, with the 5800H featuring Radeon Vega 8 and the 6600U featuring Radeon 660M. The part numbers also differ: 100-000000295 for the 5800H and 100-000000536100-000000548 for the 6600U.

Architecture Differences

Architecturally, these are distinct generations. The 5800H is based on Zen 3 architecture, codenamed Cezanne, from the 5000 series. The 6600U uses Zen 3+ architecture, codenamed Rembrandt, from the 6000 series. The process node differs, with the 5800H on 7 nm and the 6600U on 6 nm, both fabricated by TSMC. Die size varies, with the 5800H at 180 mm² and the 6600U at 208 mm². Transistor count is listed only for the 5800H at 10,700 million. Cache configurations are identical: both have 64 KB of L1 per core, 512 KB of L2 per core, and 16 MB of shared L3. The 5800H's generation is listed as "Ryzen 7 (Zen 3 (Cezanne))," while the 6600U's is "Ryzen 5 (Zen 3+ (Rembrandt))." The 6600U's larger die size suggests additional integrated features, likely related to its newer memory and PCIe support. Neither processor has an unlocked multiplier, and both are marked as Active in production status.

Where Each One Wins

The AMD Ryzen 7 5800H wins in all scenarios where multi-threading is the primary driver. This includes video editing, 3D rendering, software compilation, and any form of batch processing. Its 34.4% lead in data compression and 32.7% lead in data encryption also make it the stronger choice for file archiving and security-related tasks. The 5800H's wins in floating point math and integer math by 30.9% each position it for scientific computing and financial modeling. Its PassMark multithread score of 20,789 versus 17,026 indicates a solid advantage in general productivity workloads that can utilize all available threads.

The AMD Ryzen 5 6600U wins in single-threaded applications, where its higher boost clock and newer architecture give it a consistent, though small, edge. This includes everyday tasks like web browsing, office document editing, and light coding where performance per core matters more than total core count. The 6600U's 3.9% win in PassMark find prime numbers suggests an advantage in specific algorithmic tasks that are not easily parallelized. Its 0.2% win in Geekbench singlecore and 1.7% win in Cinebench R15 singlecore show that while the lead is real, it is not dramatic. The 6600U's lower 15-watt TDP also makes it the logical choice for fanless or ultra-portable designs where sustained performance is not the primary goal. For users who prioritize battery life and quiet operation over raw multi-threaded output, the 6600U's narrow single-thread wins combined with its efficiency profile make it a viable alternative.