AMD Ryzen 7 7840H vs AMD Ryzen 7 PRO 5755GE Comparison

The AMD Ryzen 7 7840H and AMD Ryzen 7 PRO 5755GE are both 8-core, 16-thread parts, but the benchmark data shows a decisive performance gap between them. The 7840H, a mobile Phoenix chip, wins every single head-to-head comparison against the desktop-oriented 5755GE, a Cezanne part. Both CPUs sit at the 81st percentile among all tested CPUs, yet their average benchmark scores diverge: the 7840H posts 29,868 versus 29,656 for the 5755GE. While the overall average scores look close, the individual workload deltas reveal a much larger story, with the 7840H leading by double digits in most tests and by over 50% in some.

Head-to-Head Benchmarks

The most striking pattern in the head-to-head data is the consistency of the 7840H’s victory. Across 17 benchmark comparisons, the 7840H wins all 17, with no tests favoring the 5755GE. The smallest margin comes in single-threaded PassMark tests, where the 7840H scores 3,641 against 3,353 for the 5755GE, a lead of 8.6%. That gap widens considerably in multi-threaded workloads. In PassMark’s multithread test, the 7840H scores 27,919 versus 20,870, a 33.8% advantage. Cinebench results follow the same trajectory: in Cinebench R23 multicore, the 7840H scores 23,731 versus 17,759, a 33.6% lead, while in R23 single-core it scores 3,350 versus 2,507, also a 33.6% advantage.

The 7840H’s biggest wins come in specialized compute tasks. In PassMark’s extended instructions test, the 7840H scores 25,654 against 17,029, a 50.6% lead. Even more pronounced is the find prime numbers test, where the 7840H scores 83 versus 50, a 66% advantage. Physics simulation also favors the 7840H heavily: 1,301 versus 841, a 54.7% gap. Random string sorting shows a 42.2% lead (38,938 vs 27,373), and data compression sees a 35% edge (341,520 vs 252,937). Floating-point math comes in at 26% ahead (58,724 vs 46,589), while integer math is 15.1% ahead (96,692 vs 84,004). Data encryption is the closest of the larger gaps, with the 7840H scoring 20,162 versus 16,937, a 19% lead.

Cinebench results are remarkably uniform across versions. R15 multicore shows 2,392 versus 1,789 (33.7%), R20 multicore shows 9,967 versus 7,458 (33.6%), and R23 multicore shows 23,731 versus 17,759 (33.6%). Single-core Cinebench scores mirror this: R15 shows 337 versus 252 (33.7%), R20 shows 1,407 versus 1,052 (33.7%), and R23 shows 3,350 versus 2,507 (33.6%). The consistency suggests the 7840H’s architectural advantage scales evenly across both lightly and heavily threaded workloads, rather than being limited to a specific core-count scenario.

The Verdict

The data is unambiguous: the AMD Ryzen 7 7840H is the faster processor in every measured category. For users prioritizing raw compute performance, the 7840H is the clear choice, offering at least an 8.6% improvement in single-threaded PassMark and 33.6% or better in Cinebench multicore tests. The 5755GE does not win a single benchmark, making it a poor pick for anyone seeking peak performance. However, context matters: the 7840H is a mobile part on AMD Socket FP8, while the 5755GE is a desktop part on AMD Socket AM4. If platform compatibility is the deciding factor, the 5755GE remains a viable option for AM4 systems, but its performance profile is strictly inferior.

The 7840H’s average benchmark score of 29,868 sits nearly identical to the 5755GE’s 29,656, but that average masks the head-to-head deltas. The 5755GE’s nearest rivals include the AMD Ryzen 5 9600X (29,713, -0.2%) and the AMD Ryzen 7 3800X (29,447, 0.7%), while the 7840H’s rivals include the Ryzen 7 8845HS (29,955, -0.3%) and the Ryzen 7 7840HS (29,955, -0.3%). Both CPUs are thus bracketed by similar performers, but the 7840H’s direct comparison to the 5755GE shows a 0.7% advantage in average score, aligning with the consistent per-test wins. For a user who must choose between these two specifically, the 7840H is the performance pick; for a user locked into an AM4 motherboard, the 5755GE is the only option, but the data shows it will lag behind.

Architecture Differences

The two processors come from different generations and process nodes. The 7840H is a 7000-series part built on Zen 4 architecture with the codename Phoenix, fabricated on TSMC’s 4 nm process. It packs 25,000 million transistors on a 178 mm² die. The 5755GE is a 5000-series part using Zen 3 architecture with the codename Cezanne, fabricated on TSMC’s 7 nm process, with 10,700 million transistors on a 180 mm² die. The 7840H’s smaller process node and newer architecture explain much of its performance advantage.

Cache configurations differ notably. The 7840H has 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3 cache. The 5755GE also has 64 KB of L1 per core but only 512 KB of L2 per core, with 16 MB of L3 cache. The 7840H’s larger L2 cache per core likely contributes to its superior performance in cache-sensitive workloads like random string sorting and data compression. Clock speeds also favor the 7840H: it has a 3.80 GHz base clock and a 5.10 GHz boost clock, while the 5755GE runs at 3.20 GHz base and 4.60 GHz boost. Both are 35 W TDP parts, but the 7840H achieves higher clocks within the same power envelope.

Memory and I/O specifications further distinguish the two. The 7840H supports DDR5 memory with dual-channel configuration and a memory bandwidth of 89.6 GB/s, plus ECC support. The 5755GE uses DDR4 memory, also dual-channel, with 51.2 GB/s bandwidth and no ECC support. The 7840H offers PCIe Gen 4 with 20 lanes (CPU only), while the 5755GE offers PCIe Gen 3 with 16 lanes. Integrated graphics differ as well: the 7840H uses a Radeon 780M, whereas the 5755GE uses a Radeon Vega 8. The 7840H’s socket is AMD Socket FP8, while the 5755GE uses AMD Socket AM4. The 5755GE has a release date of 2024-09-04, while the 7840H’s release date is not listed; both are marked as Active in production.

FAQ

Q: Which CPU has a higher boost clock?

A: The AMD Ryzen 7 7840H boosts to 5.10 GHz, while the AMD Ryzen 7 PRO 5755GE boosts to 4.60 GHz.

Q: How much faster is the 7840H in Cinebench R23 multicore?

A: The 7840H scores 23,731 versus 17,759 for the 5755GE, a 33.6% advantage.

Q: Do both CPUs support ECC memory?

A: No. The 7840H supports ECC memory, while the 5755GE does not.

Q: What is the memory bandwidth difference?

A: The 7840H provides 89.6 GB/s bandwidth with DDR5, while the 5755GE provides 51.2 GB/s with DDR4.

Q: Which processor has more L2 cache per core?

A: The 7840H has 1 MB of L2 per core, whereas the 5755GE has 512 KB per core.

Q: What are the process nodes for each chip?

A: The 7840H uses a 4 nm process, while the 5755GE uses a 7 nm process.

Where Each One Wins

The AMD Ryzen 7 7840H wins in every benchmark category recorded. Its largest margins are in prime number finding (66%), physics simulation (54.7%), and extended instructions (50.6%), indicating a significant advantage in mathematical and scientific workloads. It also leads substantially in random string sorting (42.2%) and data compression (35%), which are common in database and archival tasks. For multithreaded productivity, the 7840H’s 33.8% lead in PassMark multithread and 33.6% in Cinebench R23 multicore means it is the better choice for video rendering, code compilation, and other parallel workloads. Single-threaded performance favors the 7840H by 8.6% in PassMark and 33.6% in Cinebench R23, making it faster for everyday responsiveness and lightly threaded applications.

The AMD Ryzen 7 PRO 5755GE has no benchmark wins against the 7840H. Its value lies elsewhere: it is a desktop processor on the AM4 socket, which may be relevant for users with existing AM4 motherboards. Its DDR4 support could be an advantage for those reusing older memory modules, and its PCIe Gen 3 is sufficient for many peripherals. The 5755GE also has a lower transistor count (10,700 million versus 25,000 million), which may correlate with lower manufacturing complexity, but the data does not show any performance benefit. For users constrained to an AM4 platform or requiring DDR4 compatibility, the 5755GE is the only option here, but the benchmarks clearly show it will deliver less performance across all measured tasks. The 7840H is the superior processor for any workload that benefits from higher clocks, larger caches, or newer architecture.