AMD Ryzen 7 PRO 8840U vs AMD Ryzen 9 PRO 6950HS Comparison

The AMD Ryzen 7 PRO 8840U and AMD Ryzen 9 PRO 6950HS are both 8-core, 16-thread mobile processors, yet they represent distinct generations of AMD’s PRO lineup. The 8840U is built on the newer Zen 4 architecture and the 4 nm node, while the 6950HS is a Zen 3+ part on the 6 nm node. Despite the Ryzen 9 branding on the older chip, the benchmark data consistently favors the 8840U, which wins 13 of the 15 head-to-head comparisons. The 6950HS does secure two wins in data compression and encryption, suggesting a more nuanced story than a simple generational sweep.

Where Each One Wins

The AMD Ryzen 7 PRO 8840U is the clear winner for most compute-heavy workloads. In Cinebench testing, its lead is overwhelming, particularly in the multi-core R23 test where it scores 20,254 versus the 6950HS’s 11,515, a difference of 75.9 percent. This makes the 8840U the obvious choice for rendering, video encoding, and any task that scales across all 16 threads. Its single-core advantage is equally pronounced; the R23 single-core score of 2,859 is 88.8 percent higher than the 6950HS’s 1,514, which translates to snappier application responsiveness and better performance in lightly-threaded software.

The 8840U also dominates in PassMark’s integer math, floating point math, and prime number finding tests, winning by margins of 0.2, 5.5, and 35.7 percent respectively. The physics test (12.6 percent) and random string sorting (12.8 percent) also fall in its favor. The data suggests the 8840U is not just faster in synthetic multi-core benchmarks; it is also more efficient at handling diverse instruction types and memory-access patterns.

The AMD Ryzen 9 PRO 6950HS, despite its older architecture, holds two notable wins. It leads in PassMark data compression by 3.5 percent (282,624 vs. 272,664) and in data encryption by 7.8 percent (17,837 vs. 16,441). These are narrow but consistent margins. This indicates the 6950HS has a specific strength in workloads that heavily utilize AES instructions or similar cryptographic operations. For users whose primary tasks involve file archiving, database compression, or encrypted data processing, the older chip might have a slight edge, even if it loses everywhere else.

Architecture Differences

The fundamental difference lies in the processor core architecture and manufacturing process. The 8840U is a Zen 4 design, codenamed Hawk Point, fabricated on TSMC’s 4 nm process. The 6950HS is a Zen 3+ design, codenamed Rembrandt, using the older 6 nm node. This generational leap explains much of the performance gap. The newer 4 nm process allows for higher clock speeds and better power efficiency, which is reflected in the 8840U’s 5.10 GHz boost clock versus the 6950HS’s 4.90 GHz. The base clocks are identical at 3.30 GHz, but the boost headroom is clearly on the side of the 8840U.

The cache hierarchy also differs. Both chips share 16 MB of L3 cache and 64 KB of L1 per core. However, the L2 cache is different: the 8840U offers 1 MB per core, while the 6950HS offers only 512 KB per core. This doubling of L2 cache likely contributes to the 8840U’s strong performance in latency-sensitive workloads and its substantial lead in single-threaded tests.

Memory bandwidth is another differentiator. The 8840U supports 89.6 GB/s of memory bandwidth, whereas the 6950HS is limited to 76.8 GB/s. Both use dual-channel DDR5, but the newer chip’s memory controller is evidently more capable. The 8840U also supports ECC memory, a feature absent on the 6950HS, which could be a deciding factor for workstations requiring error correction. The integrated graphics differ as well: the 8840U uses the Radeon 780M, while the 6950HS uses the Radeon 680M. The transistor count and die size also tell a story: the 8840U packs 25,000 million transistors into a 178 mm² die, while the 6950HS has a larger 208 mm² die but with an unspecified transistor count.

Head-to-Head Benchmarks

The most striking result is in Cinebench R23 multi-core. The 8840U scores 20,254, a massive 75.9 percent ahead of the 6950HS’s 11,515. This is not a marginal improvement; it is a generational leap that suggests the 8840U can handle sustained multi-threaded loads with far greater ease. The R23 single-core result is even more lopsided in percentage terms, with the 8840U at 2,859 versus 1,514, an 88.8 percent advantage. While these are synthetic benchmarks, they are strong proxies for real-world rendering and simulation tasks.

In Cinebench R15, the margins shrink but remain decisive. The 8840U wins multi-core by 6.7 percent (2,041 vs. 1,913) and single-core by 20.5 percent (288 vs. 239). The R15 single-core delta is particularly telling, as it isolates the raw IPC and clock speed advantages of the Zen 4 core.

PassMark results are more mixed. The 8840U wins multi-threaded performance by 4.7 percent (23,850 vs. 22,775) and single-threaded performance by 7.1 percent (3,641 vs. 3,400). Its largest PassMark win is in finding prime numbers, where it scores 76 versus 56, a 35.7 percent jump. Floating point math (5.5 percent), random string sorting (12.8 percent), and physics (12.6 percent) also favor the 8840U. The integer math score is nearly identical, with the 8840U at 88,339 and the 6950HS at 88,124, a marginal 0.2 percent difference.

The 6950HS’s wins are in data compression (282,624 vs. 272,664) and data encryption (17,837 vs. 16,441). These are the only two tests where the older chip pulls ahead, and the margins are modest. The data suggests the 6950HS has a more optimized implementation for certain cryptographic and compression algorithms, possibly due to specific instruction scheduling, despite its overall architectural disadvantage.

Specification Differences

• Process Node: The 8840U uses a 4 nm node, while the 6950HS uses a 6 nm node.
• Architecture: The 8840U is Zen 4 (Hawk Point), the 6950HS is Zen 3+ (Rembrandt).
• Boost Clock: The 8840U boosts to 5.10 GHz; the 6950HS boosts to 4.90 GHz.
• TDP: The 8840U has a 28 W TDP, while the 6950HS has a 35 W TDP.
• L2 Cache: The 8840U has 1 MB per core, the 6950HS has 512 KB per core.
• Memory Bandwidth: The 8840U supports 89.6 GB/s, the 6950HS supports 76.8 GB/s.
• ECC Memory: Supported on the 8840U, not on the 6950HS.
• Integrated Graphics: The 8840U has Radeon 780M, the 6950HS has Radeon 680M.
• Die Size: The 8840U is 178 mm², the 6950HS is 208 mm².
• Release Date: The 8840U launched in April 2024, the 6950HS in April 2022.
• Transistors: The 8840U has 25,000 million; the 6950HS has no listed count.

FAQ

Q: Which processor is better for multi-core rendering?

A: The AMD Ryzen 7 PRO 8840U is significantly better. It scores 20,254 in Cinebench R23 multi-core, which is 75.9 percent higher than the Ryzen 9 PRO 6950HS’s score of 11,515.

Q: Does the Ryzen 9 PRO 6950HS have any advantages at all?

A: Yes, it wins two head-to-head tests. It beats the 8840U in PassMark data compression by 3.5 percent (282,624 vs. 272,664) and in data encryption by 7.8 percent (17,837 vs. 16,441).

Q: Why is the single-core performance gap so large?

A: The 8840U has a higher boost clock (5.10 GHz vs. 4.90 GHz) and double the L2 cache per core (1 MB vs. 512 KB). In Cinebench R23 single-core, the 8840U scores 2,859, an 88.8 percent lead over the 6950HS’s 1,514.

Q: Are both processors on the same socket?

A: Yes, both use AMD Socket FP7. However, the 8840U has a different part number for the FP7 and FP7r2 sockets, while the 6950HS lists a different part number.

Q: Which chip supports ECC memory?

A: Only the AMD Ryzen 7 PRO 8840U supports ECC memory. The Ryzen 9 PRO 6950HS does not have ECC support.

Q: How do their average benchmark scores compare?

A: The 8840U has an average benchmark score of 32,233, placing it in the 83rd percentile. The 6950HS has an average score of 31,850, placing it in the 82nd percentile.

The Verdict

The data points to a single conclusion: the AMD Ryzen 7 PRO 8840U is the superior processor for nearly all workloads. It wins 13 of 15 head-to-head benchmarks, with decisive leads in both single-threaded and multi-threaded performance. Its 88.8 percent advantage in Cinebench R23 single-core and 75.9 percent in multi-core are not subtle refinements; they are transformative gains for any application that relies on CPU compute. The 4 nm process, higher boost clock, and doubled L2 cache give it a clear architectural edge.

The Ryzen 9 PRO 6950HS is not obsolete, but its role is narrow. Its wins in data compression and encryption suggest it is still a capable choice for specific security and data-handling tasks. Its lower memory bandwidth and smaller L2 cache are compensated by some unknown optimization in those specific PassMark tests. For a user whose primary workload is heavy encryption or compression, the 6950HS might offer a marginal benefit.

For everyone else, the 8840U is the logical pick. It offers better performance in physics, random string sorting, floating point math, and prime number finding. It also supports ECC memory, a feature that can be critical for data integrity in professional environments. The 8840U achieves all this while consuming less power, with a 28 W TDP versus the 6950HS’s 35 W. The older Ryzen 9 branding does not compensate for the newer Ryzen 7’s superior engineering. The verdict is straightforward: choose the 8840U for general performance, choose the 6950HS only if your specific workload involves the two tests it wins.