AMD Ryzen 5 8645HS vs AMD Ryzen 9 PRO 6950H Comparison

The AMD Ryzen 5 8645HS and the AMD Ryzen 9 PRO 6950H are two mobile processors that land nearly on top of each other in overall average benchmark scores, with the 8645HS achieving 33244 and the 6950H achieving 33201. This places both in the 83rd percentile of all CPUs, and their nearest rival data shows they are effectively tied, with the 8645HS sitting 0.1% ahead of the 6950H and the 6950H sitting 0.1% behind the 8645HS in their respective listings. The data shows a clear split: the Ryzen 9 PRO 6950H wins 9 of the 15 head-to-head benchmark comparisons, while the Ryzen 5 8645HS wins 6, but the nature of those wins tells the real story about which chip suits which workload.

The Verdict

The benchmark data does not declare a single overall winner, because each processor dominates a distinct category of work. The AMD Ryzen 9 PRO 6950H is the choice for heavily threaded, sustained workloads: it wins the multi-core Cinebench tests, taking Cinebench R23 multi-core with a score of 13501 against 13220 (a 2.1% margin) and Cinebench R15 multi-core with 2153 against 2094 (a 2.7% margin). Its advantage expands dramatically in integer-heavy and data tasks, where it leads by 16.6% in PassMark integer math (87132 vs 72640) and 16.5% in PassMark data encryption (18673 vs 15588). This makes it the better option for compiling code, running virtual machines, or any professional workload that scales across many cores.

Conversely, the AMD Ryzen 5 8645HS is the pick for single-threaded responsiveness and lightly threaded applications. It wins Cinebench R23 single-core by 6.1% (1714 vs 1615) and PassMark single-thread by 9.8% (3653 vs 3326). Its 21% lead in PassMark find prime numbers (75 vs 62) shows a significant advantage in specific algorithmic tasks that rely on per-core speed. For a user whose daily driver is office productivity, web browsing, or software that rarely uses more than a few threads, the 8645HS delivers snappier performance. The data shows that neither chip is a universal victor, so the correct choice hinges entirely on whether the target workload favors core count or single-core clock speed.

Where Each One Wins

The Ryzen 9 PRO 6950H wins across the board in multi-threaded and throughput-oriented benchmarks. Beyond the two Cinebench multi-core wins, it takes PassMark multithread with 23770 versus 22586 (a 5% margin), and it dominates in PassMark data compression (297936 vs 265483, a 10.9% lead) and PassMark floating point math (48821 vs 44833, an 8.2% lead). It also wins PassMark extended instructions by a narrow 1.5% (20302 vs 20003) and PassMark physics by 1.8% (1115 vs 1095). These results point toward a processor that excels when all 8 cores and 16 threads are engaged, particularly in scientific computing, media encoding, and database operations where data compression and encryption are frequent.

The Ryzen 5 8645HS wins in areas that reward higher clock speeds and newer architecture. Its single-core victories are substantial: 9.8% in PassMark single-thread and 6.1% in Cinebench R23 single-core. It also wins Cinebench R15 single-core by 3.8% (270 vs 260). In PassMark random string sorting, it leads by 2.9% (31748 vs 30859), which is a task that can be sensitive to memory latency and per-core efficiency. The 21% win in PassMark find prime numbers is its largest margin of victory, suggesting the 8645HS has a meaningful edge in integer-heavy, branch-predictor-sensitive workloads that do not scale well across cores. The pattern is consistent: the 8645HS wins where the software uses one or two threads, and the 6950H wins where the software uses many.

Architecture Differences

The two processors come from different generations and manufacturing processes, which explains their distinct performance profiles. The Ryzen 5 8645HS is built on the Zen 4 architecture using a 4 nm process from TSMC, with a die size of 178 mm² and 25,000 million transistors. It belongs to the 8000 series and carries the codename Hawk Point. In contrast, the Ryzen 9 PRO 6950H uses the older Zen 3+ architecture on a 6 nm process, also from TSMC, with a larger die size of 208 mm² and no transistor count listed in the data. The 8645HS has 6 cores and 12 threads, while the 6950H has 8 cores and 16 threads, giving the latter a raw core-count advantage that drives its multi-threaded wins.

Cache configuration differs in a key way: both share 16 MB of L3 cache, but the L2 cache per core is doubled on the 8645HS at 1 MB per core versus 512 KB per core on the 6950H. Both have 64 KB of L1 cache per core. The 8645HS has a higher base clock of 4.30 GHz and boost clock of 5.00 GHz, compared to 3.30 GHz base and 4.90 GHz boost on the 6950H. The newer 4 nm process and higher clocks on the 8645HS explain its single-thread dominance, while the 6950H compensates with two additional cores. The integrated graphics also differ: the 8645HS features the Radeon 760M, while the 6950H features the Radeon 680M. Memory bandwidth favors the 8645HS at 89.6 GB/s versus 76.8 GB/s on the 6950H, though both support dual-channel DDR5. The 8645HS uses the AMD Socket FP8, while the 6950H uses the AMD Socket FP7, and both support PCIe Gen 4 with 20 lanes (CPU only). Neither processor supports ECC memory, and both are locked (multiplier unlocked: false).

FAQ

Q: Which processor is faster in single-core performance?

A: The AMD Ryzen 5 8645HS wins every single-core benchmark in the head-to-head data. It leads by 9.8% in PassMark single-thread (3653 vs 3326), by 6.1% in Cinebench R23 single-core (1714 vs 1615), and by 3.8% in Cinebench R15 single-core (270 vs 260).

Q: Which processor is better for multi-threaded workloads?

A: The AMD Ryzen 9 PRO 6950H wins all multi-threaded benchmarks. It leads by 2.1% in Cinebench R23 multi-core (13501 vs 13220), by 5% in PassMark multithread (23770 vs 22586), and by 16.6% in PassMark integer math (87132 vs 72640).

Q: How do their overall average scores compare?

A: They are nearly identical. The Ryzen 5 8645HS has an average benchmark score of 33244, and the Ryzen 9 PRO 6950H has an average of 33201, a difference of just 0.1% in favor of the 8645HS. Both sit in the 83rd percentile of all CPUs.

Q: What is the core and thread count difference?

A: The Ryzen 9 PRO 6950H has 8 cores and 16 threads, while the Ryzen 5 8645HS has 6 cores and 12 threads. The 6950H's two extra cores are the primary reason for its multi-threaded wins.

Q: Which processor has a smaller manufacturing process?

A: The Ryzen 5 8645HS is built on a 4 nm process, while the Ryzen 9 PRO 6950H uses a 6 nm process. The 8645HS also has a smaller die size at 178 mm² versus 208 mm² for the 6950H.

Q: Do both processors support the same memory?

A: Yes, both support dual-channel DDR5 memory. However, the memory bandwidth differs: the 8645HS offers 89.6 GB/s, while the 6950H offers 76.8 GB/s.

Head-to-Head Benchmarks

The largest win for the Ryzen 5 8645HS comes in PassMark find prime numbers, where it scores 75 against the 6950H's 62, a 21% margin. This is a striking result because it is a heavily integer-based workload that does not scale well with extra cores, so the 8645HS's higher boost clock of 5.00 GHz and newer Zen 4 architecture provide a decisive edge. The second-largest win for the 8645HS is in PassMark single-thread, where it scores 3653 versus 3326, a 9.8% advantage. This is the most relevant metric for everyday application responsiveness, and the data shows the 8645HS is clearly superior in this regard. It also wins Cinebench R23 single-core by 6.1% (1714 vs 1615) and Cinebench R15 single-core by 3.8% (270 vs 260). Its final win is PassMark random string sorting, where it leads by 2.9% (31748 vs 30859).

The Ryzen 9 PRO 6950H counters with its own set of decisive victories. Its largest win is in PassMark integer math, where it scores 87132 against 72640, a 16.6% margin. This is the single biggest raw score difference in the entire comparison, and it underscores the value of the 6950H's 8 cores in arithmetic-heavy tasks. It also wins PassMark data encryption by 16.5% (18673 vs 15588) and PassMark data compression by 10.9% (297936 vs 265483). These three wins alone make the 6950H the clear choice for security-related workloads, file archiving, and any application that processes large amounts of structured data. It further wins PassMark floating point math by 8.2% (48821 vs 44833) and PassMark multithread by 5% (23770 vs 22586). In Cinebench, it wins R23 multi-core by 2.1% (13501 vs 13220) and R15 multi-core by 2.7% (2153 vs 2094). It also edges out the 8645HS in PassMark extended instructions by 1.5% (20302 vs 20003) and PassMark physics by 1.8% (1115 vs 1095).

The overall score distribution tells a consistent story. The 6950H's wins tend to be larger in magnitude on the multi-threaded side, with three victories exceeding 10%, while the 8645HS has only one win exceeding 10% (the prime numbers test at 21%). However, the 8645HS's single-thread victory at 9.8% is more relevant to typical consumer workloads than the 6950H's data compression lead. The average benchmark scores are within 0.1% of each other, but the distribution of wins shows that the 6950H is the more consistent performer across a wider range of tests, winning 9 of 15 comparisons. The 8645HS wins 6, but its wins are concentrated in the areas that most affect perceived speed in everyday use.

Specification Differences

The most significant specification difference is core count: the Ryzen 9 PRO 6950H has 8 cores and 16 threads, while the Ryzen 5 8645HS has 6 cores and 12 threads. Clock speeds also differ substantially, with the 8645HS running at 4.30 GHz base and 5.00 GHz boost, versus 3.30 GHz base and 4.90 GHz boost on the 6950H. The manufacturing process differs as well: the 8645HS uses 4 nm technology, while the 6950H uses 6 nm. The die size is 178 mm² for the 8645HS and 208 mm² for the 6950H, and the 8645HS is listed with 25,000 million transistors while the 6950H has no transistor count provided.

Cache configuration differs in L2 cache size: the 8645HS has 1 MB per core, while the 6950H has 512 KB per core. Both share 16 MB of L3 cache and 64 KB of L1 cache per core. Memory bandwidth favors the 8645HS at 89.6 GB/s versus 76.8 GB/s for the 6950H, though both support dual-channel DDR5. The integrated graphics units differ: the 8645HS has a Radeon 760M, and the 6950H has a Radeon 680M. The socket is different as well, with the 8645HS using AMD Socket FP8 and the 6950H using AMD Socket FP7. Both support PCIe Gen 4 with 20 lanes (CPU only), neither supports ECC memory, and neither has an unlocked multiplier. The 8645HS was released on 2023-12-05, while the 6950H was released on 2022-04-18. Both are mobile processors, currently marked as Active in production, with no launch MSRP listed for either.