AMD Ryzen 7 7840H vs AMD Ryzen 7 7840HS Comparison

The AMD Ryzen 7 7840HS and AMD Ryzen 7 7840H are two nearly identical mobile processors, sharing the same Zen 4 architecture, 8 cores, 16 threads, and a 35 W TDP. Benchmark data reveals a fascinating split: the 7840HS wins 13 of 21 head-to-head tests, while the 7840H takes 8, yet the 7840H’s victories are often by massive margins in specific workloads. The average benchmark scores are virtually tied at 29955 for the HS and 29868 for the H, with a delta of just 0.3 percent. This is a case where the overall average hides dramatic per-test swings, making the choice between them dependent entirely on the intended workload.

Where Each One Wins

The AMD Ryzen 7 7840H is the clear winner in rendering and heavily threaded synthetic loads. Its most striking victory comes in Cinebench R23 multicore, where it scores 23731 against the 7840HS’s 15102, a 36.4 percent advantage. Similarly, in Cinebench R15 multicore, the 7840H leads with 2392 versus 2222.84, a 7.1 percent edge. The 3DMark suite also favors the 7840H in 16-thread (7461 vs 7314), max-thread (7409 vs 7316), and 8-thread (6116 vs 6092) tests, though by smaller margins of 2 percent, 1.3 percent, and 0.4 percent respectively. If a laptop is destined for video editing, 3D rendering, or any task that scales across all cores, the 7840H’s multicore muscle is the deciding factor.

The AMD Ryzen 7 7840HS, conversely, dominates in almost every PassMark subtest and in lightweight threading scenarios. It wins PassMark multithread (28633 vs 27919, a 2.6 percent lead), integer math (98682 vs 96692, 2.1 percent), floating-point math (59921 vs 58724, 2 percent), and physics (1376 vs 1301, 5.8 percent). It also takes data compression (345536 vs 341520, 1.2 percent), data encryption (20627 vs 20162, 2.3 percent), random string sorting (40364 vs 38938, 3.7 percent), and find prime numbers (88 vs 83, 6 percent). In 3DMark, the HS wins the 4-thread test (3651 vs 3638, 0.4 percent) and single-thread test (979 vs 976, 0.3 percent). For everyday productivity, software compilation, or scientific computing that uses varied instruction sets, the 7840HS is consistently ahead, albeit by single-digit percentages.

The split is stark: the 7840H is a specialist for sustained, all-core compute, while the 7840HS is a generalist that wins the majority of tests by small but meaningful amounts. The 7840HS’s PassMark single-thread score of 3753 versus 3641 (3.1 percent) reinforces its edge in lightly threaded apps, a category that includes many legacy programs and scripting workloads.

Architecture Differences

Both processors are built on the exact same silicon. They share the Zen 4 architecture, the Phoenix codename, and are manufactured by TSMC on a 4 nm process node. The transistor count is identical at 25,000 million, and the die size is the same 178 mm². Both feature 8 cores and 16 threads with a base clock of 3.80 GHz and a boost clock of 5.10 GHz. The cache hierarchy is also identical: 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3 cache.

There are no differences in memory support either. Both use DDR5 memory in a dual-channel configuration with a bandwidth of 89.6 GB/s, and both support ECC memory. The PCIe implementation is the same: Gen 4 with 20 lanes from the CPU. Both integrate the Radeon 780M graphics, target the mobile market, use the AMD Socket FP8, and are currently marked as Active in production. The part numbers are identical across both, listing the same FP7r2, FP7, and FP8 package variants. Neither processor has an unlocked multiplier.

Given this complete architectural parity, the benchmark differences cannot stem from any hardware variation. The only plausible explanation is firmware, power delivery tuning, or binning differences that are not captured in the static specification sheet. The data shows two chips that are functionally indistinguishable on paper but behave differently under load, likely due to how each system manufacturer configures the 35 W TDP envelope.

Head-to-Head Benchmarks

The largest single margin in the entire comparison is the Cinebench R23 single-core test, where the 7840H scores 3350 against the 7840HS’s 1761, a 47.4 percent deficit for the HS. This is an enormous gap for a single-threaded workload and suggests the 7840H sustains higher boost clocks under short bursts. Cinebench R15 single-core shows a similar trend, with the 7840H at 337 versus 274, an 18.7 percent lead. These results are counterintuitive given the identical 5.10 GHz boost clock, but the benchmark data is unambiguous.

In multicore rendering, the 7840H again dominates. Cinebench R23 multicore shows the 7840H at 23731 versus 15102, a 36.4 percent gap. Cinebench R15 multicore is closer but still favors the 7840H at 2392 versus 2222.84, a 7.1 percent difference. The 7840H also has a Cinebench R20 result, scoring 9967 multicore and 1407 single-core, though the 7840HS has no R20 scores in the data for direct comparison.

The 7840HS fights back in the PassMark suite. Its largest win is in find prime numbers, scoring 88 versus 83, a 6 percent advantage. Physics follows at 1376 versus 1301, a 5.8 percent lead. Random string sorting shows a 3.7 percent edge (40364 vs 38938), and single-thread performance is 3.1 percent better (3753 vs 3641). Multithread is 2.6 percent higher (28633 vs 27919), and data encryption is 2.3 percent ahead (20627 vs 20162). Integer math, floating-point math, and data compression all go to the 7840HS by margins between 1.2 and 2.1 percent.

In 3DMark, the results are mixed but mostly narrow. The 7840H wins 16-thread by 2 percent, max-thread by 1.3 percent, and 8-thread by 0.4 percent. The 7840HS wins 4-thread by 0.4 percent and single-thread by 0.3 percent. The 2-thread test is a virtual tie, with the 7840H at 1906 versus 1904.

Overall, the 7840H’s wins are concentrated and devastating in Cinebench, while the 7840HS’s wins are broad and consistent across PassMark. The average benchmark score of 29955 for the HS versus 29868 for the H confirms that the HS is marginally better on average, but the 7840H is the pick for pure rendering performance.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 7 7840HS has an average benchmark score of 29955, which is 0.3 percent higher than the AMD Ryzen 7 7840H’s score of 29868.

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

A: The data shows the 7840H scoring 23731 versus 15102 for the 7840HS, a 36.4 percent difference. This is the largest multicore gap in the comparison, despite identical core counts and clock speeds.

Q: Does the 7840HS win any tests by a large margin?

A: No, its largest win is 6 percent in PassMark find prime numbers. Most of its victories are in the 1-4 percent range, making it a consistent but not dominant winner.

Q: Are there any architectural differences between the two chips?

A: No. Both use the Zen 4 architecture, 4 nm process, 8 cores, 16 threads, 16 MB L3 cache, and identical memory and PCIe support. The part numbers are also the same.

Q: Which chip is better for gaming or light workloads?

A: The 7840HS wins the 3DMark single-thread test (979 vs 976) and the 4-thread test (3651 vs 3638), suggesting a slight edge in lightly threaded gaming scenarios. It also has a 3.1 percent lead in PassMark single-thread.

Q: What is the TDP of both processors?

A: Both have a TDP of 35 W, and both use the AMD Socket FP8.

Specification Differences

The following fields are identical between the AMD Ryzen 7 7840HS and the AMD Ryzen 7 7840H:

• Series: 7000 series
• Manufacturer: AMD
• Cores: 8
• Threads: 16
• Base Clock: 3.80 GHz
• Boost Clock: 5.10 GHz
• TDP: 35 W
• Socket: AMD Socket FP8
• Architecture: Zen 4
• Codename: Phoenix
• Process Node: 4 nm
• Foundry: TSMC
• Transistors: 25,000 million
• Die Size: 178 mm²
• Cache: 64 KB L1 per core, 1 MB L2 per core, 16 MB L3 shared
• Memory Support: DDR5
• Memory Bus: Dual-channel
• Memory Bandwidth: 89.6 GB/s
• ECC Memory: Yes
• PCIe: Gen 4, 20 Lanes (CPU only)
• Integrated Graphics: Radeon 780M
• Market Segment: Mobile
• Production Status: Active
• Multiplier Unlocked: No
• Part Number: 100-000000955(FP7r2), 100-000000964(FP7), 100-000001129(FP8)

There are no specification differences between the two processors. The only distinctions in the data are the benchmark scores, where the 7840HS wins 13 tests and the 7840H wins 8, and the average benchmark scores, which differ by 0.3 percent.