AMD Ryzen 7 6800H vs AMD Ryzen 7 7840U Comparison

FAQ

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 7 7840U boosts to 5.10 GHz, while the AMD Ryzen 7 6800H reaches 4.70 GHz. The 7840U also has a slightly higher base clock at 3.30 GHz versus 3.20 GHz.

Q: What is the difference in process node between the two chips?

A: The Ryzen 7 7840U is built on TSMC's 4 nm process, while the Ryzen 7 6800H uses TSMC's 6 nm node. The 7840U also has a smaller die size at 178 mm² compared to 208 mm².

Q: Which chip wins in single-threaded performance?

A: The Ryzen 7 7840U leads in every single-thread test. Its Geekbench single-core score is 2077 versus 1761, a 17.9% advantage. Cinebench R23 single-core shows 1677.5 against 1542, an 8.8% edge.

Q: Does the Ryzen 7 6800H outperform the 7840U in multi-core workloads?

A: Yes, in most heavy multi-threaded tests. The 6800H wins Geekbench multi-core (9642 vs 8766, 9.1% ahead), Cinebench R23 multi-core (13094 vs 12719, 2.9% ahead), and 3DMark max threads (6532 vs 5402, 17.3% ahead).

Q: What are the integrated graphics differences?

A: The 7840U features the Radeon 780M, while the 6800H has the Radeon 680M. Both support DDR5 memory, but the 7840U offers higher memory bandwidth at 89.6 GB/s versus 76.8 GB/s.

Q: Which processor has ECC memory support?

A: Only the Ryzen 7 7840U supports ECC memory. The Ryzen 7 6800H does not list ECC as a feature.

The Verdict

The data paints a clear split. The Ryzen 7 7840U is the choice for single-thread responsiveness, floating-point math, integer workloads, and general productivity tasks that favor newer architecture. It wins 14 of the 23 head-to-head benchmarks. The Ryzen 7 6800H, however, takes the crown in heavily multi-threaded scenarios, winning 9 tests including all 3DMark multi-thread variants and Geekbench multi-core.

For users prioritizing raw multi-core throughput in sustained workloads, the 6800H with its 45 W TDP and higher 3DMark 16-thread score (6560 vs 5427, 17.3% ahead) is the stronger pick. But for anyone who needs snappy single-thread performance, faster memory bandwidth, ECC support, and a more efficient 4 nm process, the 7840U's wins in Geekbench single-core (17.9% ahead) and PassMark single-thread (11% ahead) make it the more balanced daily driver.

The average benchmark scores are nearly identical: the 7840U averages 25432, the 6800H averages 25201, a difference of less than 1%. Both sit at the 77th percentile among all CPUs. The verdict depends on workload shape, not overall capability.

Head-to-Head Benchmarks

The 6800H's biggest victory comes in 3DMark 16-thread and max-thread tests, where it scores 6560 and 6532 respectively, against the 7840U's 5427 and 5402, a 17.3% margin in both cases. The 8-thread test shows a 15% lead (5392 vs 4583), and the 4-thread test adds a 5.8% edge (3214 vs 3029). These results suggest the 6800H sustains higher throughput when all cores are active, likely due to its higher 45 W TDP allowing more aggressive power delivery.

Geekbench multi-core reinforces this pattern: the 6800H scores 9642 versus 8766, a 9.1% advantage. Cinebench R23 multi-core shows a smaller but still positive 2.9% lead (13094 vs 12719). Even in Cinebench R15 multi-core, the 6800H wins by 6.8% (2136 vs 1990). The 6800H also edges ahead in PassMark data compression (293929 vs 288604, 1.8%) and data encryption (18260 vs 17691, 3.1%).

The 7840U answers with decisive single-thread dominance. Geekbench single-core shows a 17.9% lead (2077 vs 1761). Cinebench R23 single-core gives an 8.8% edge (1677.5 vs 1542), and R15 single-core adds 8.9% (264 vs 242.5). 3DMark single-thread shows a 6.9% win (932 vs 872), and 3DMark 2-thread adds a narrow 2% victory (1729 vs 1695).

PassMark results heavily favor the 7840U in computational density. The find prime numbers test shows a massive 40.4% lead (80 vs 57). Physics scores 20.1% higher (1256 vs 1046). Random string sorting is 10.1% ahead (33757 vs 30668). Floating-point math wins by 7.9% (51767 vs 47989), integer math by 6.4% (90852 vs 85397), and multithread by 7.5% (24782 vs 23060). Extended instructions add a 1.6% edge (20432 vs 20114).

The pattern is clear: the 6800H excels in sustained all-core rendering and 3DMark-style workloads, while the 7840U wins in per-thread efficiency, math-heavy tasks, and memory-sensitive operations.

Specification Differences

The two chips share 8 cores, 16 threads, dual-channel DDR5 memory support, Gen 4 PCIe with 20 CPU lanes, and a mobile market segment. Both are actively produced and have locked multipliers.

Key differences: the 7840U has a 3.30 GHz base clock and 5.10 GHz boost, versus 3.20 GHz and 4.70 GHz for the 6800H. TDP differs significantly: 28 W for the 7840U, 45 W for the 6800H. The 7840U uses AMD Socket FP8, the 6800H uses FP7.

Cache configurations differ in L2: the 7840U has 1 MB per core, the 6800H has 512 KB per core. Both share 64 KB L1 per core and 16 MB shared L3. Memory bandwidth is higher on the 7840U at 89.6 GB/s versus 76.8 GB/s. ECC memory is supported only on the 7840U. Integrated graphics differ: Radeon 780M on the 7840U, Radeon 680M on the 6800H. The 7840U is built on a 4 nm node with 178 mm² die size, while the 6800H uses 6 nm and 208 mm².

Architecture Differences

The 7840U belongs to the 7000 series and uses Zen 4 architecture under the Phoenix codename. The 6800H is from the 6000 series with Zen 3+ architecture under Rembrandt. This generational leap explains several measured advantages.

Zen 4 brings a smaller 4 nm process versus 6 nm, allowing higher clock speeds at lower TDP. The 7840U achieves a 5.10 GHz boost with only 28 W TDP, while the 6800H needs 45 W to reach 4.70 GHz. The 4 nm node also enables a smaller die (178 mm² vs 208 mm²) despite adding more L2 cache per core.

The L2 cache doubling from 512 KB to 1 MB per core likely contributes to the 7840U's single-thread and math benchmark wins. Memory bandwidth increases from 76.8 GB/s to 89.6 GB/s, a 16.7% improvement that helps data-heavy tasks. The 7840U adds ECC support, a feature absent on the 6800H.

Both chips use TSMC as the foundry. The 7840U has 25,000 million transistors, while the 6800H's transistor count is not recorded in the database. The integrated graphics upgrade from Radeon 680M to Radeon 780M reflects the architectural refresh, though no graphics benchmarks are included in this comparison.

Where Each One Wins

The Ryzen 7 6800H is the pick for sustained multi-core workloads. Its 3DMark 16-thread and max-thread scores lead by 17.3%, and Geekbench multi-core by 9.1%. Cinebench R23 multi-core, a common rendering benchmark, favors the 6800H by 2.9%. Users running video encoding, 3D rendering, or heavy compilation workloads should favor the 6800H, especially in systems that can sustain 45 W power draw.

The Ryzen 7 7840U wins in single-thread responsiveness and computational efficiency. Its 17.9% Geekbench single-core lead and 40.4% prime-number test advantage suggest superior per-core IPC. The 11% PassMark single-thread edge and 20.1% physics win indicate faster integer and floating-point execution. The 7.9% floating-point and 6.4% integer math wins make the 7840U better suited for scientific computing, spreadsheet analysis, and code compilation that scales with per-thread speed.

The 7840U also wins in memory bandwidth and ECC support, making it the better choice for memory-sensitive workloads or systems requiring error correction. Its 28 W TDP and 4 nm process suggest it fits thinner, cooler devices, while the 6800H's 45 W TDP aligns with larger, performance-focused laptops.

For mixed usage, the 7840U offers a more balanced profile. It wins 14 benchmarks, including all single-thread tests and most PassMark math categories, while losing only in 3DMark multi-thread variants, Geekbench multi-core, Cinebench multi-core, and two PassMark data tasks. The 6800H wins 9 benchmarks, all in multi-thread or data-intensive categories. The choice comes down to whether sustained all-core throughput or per-thread efficiency matters more for the target use case.