AMD Ryzen 7 5700 vs AMD Ryzen 7 7840U Comparison

The AMD Ryzen 7 5700 and AMD Ryzen 7 7840U are both 8-core, 16-thread processors, but their benchmark profiles reveal two very different design philosophies. The data shows a clear split: the desktop-oriented Ryzen 7 5700 dominates heavily in multi-threaded workloads, while the mobile-focused Ryzen 7 7840U counters with wins in single-threaded and specific math tests. Out of 23 head-to-head benchmarks, the Ryzen 7 5700 takes 13 wins, while the Ryzen 7 7840U takes 10.

Head-to-Head Benchmarks

The most dramatic divergence appears in Cinebench R23. Here, the Ryzen 7 5700 scores 20655 in multi-core, compared to 12719 for the 7840U — a 62.4% advantage. The single-core R23 result is even more lopsided, with the 5700 posting 2916 against 1677.5, a 73.8% lead. These are the largest deltas in the entire comparison, indicating that the desktop part has a significant sustained-performance advantage under this rendering workload.

The 3DMark suite reinforces the multi-threaded story. In 3dmark_16_threads, the 5700 scores 6628 versus 5427, a 22.1% gap. The 8-thread test shows a 21.9% lead (5585 vs 4583), and the max-threads result is 22.5% higher (6617 vs 5402). Even the 4-thread test favors the 5700 by 11.7% (3382 vs 3029). The only 3DMark win for the 7840U is single-thread, where it edges ahead by 3.3% (932 vs 901).

Geekbench presents a mixed picture. The 5700 wins multi-core by 13.6% (9959 vs 8766), but the 7840U takes single-core by 8.2% (2077 vs 1907). This pattern — the desktop chip winning when all cores are engaged, the mobile chip winning when only one core is active — repeats across several suites.

Cinebench R15 shows a narrower but still notable gap. The 5700 leads multi-core by 4.6% (2082 vs 1990) and single-core by 11% (293 vs 264). This is interesting because the single-core R15 result contradicts the Geekbench single-core finding, suggesting that the 5700's higher base clock of 3.70 GHz helps in some short-duration single-thread tests, despite the 7840U's higher boost clock of 5.10 GHz.

PassMark tests split almost evenly. The 5700 wins data compression by 9.7% (316699 vs 288604), encryption by 13.6% (20096 vs 17691), and extended instructions by 7.4% (21945 vs 20432). The 7840U counters with a 27.5% win in find prime numbers (80 vs 58), a 21.7% win in physics (1256 vs 984), and a 7.5% win in single-thread (3565 vs 3296). Floating-point math and integer math are nearly tied, with the 7840U ahead by 0.7% and 0.8%, respectively. The 7840U also takes multithread by 1.9% (24782 vs 24303) and random string sorting by 1.8% (33757 vs 33138).

The Verdict

The data points to a clear recommendation for each use case. The AMD Ryzen 7 5700 is the choice for users who prioritize sustained multi-threaded performance in a desktop environment. Its 62.4% lead in Cinebench R23 multi-core and 22.1% lead in 3dmark_16_threads indicate that heavily threaded workloads like 3D rendering, video encoding, and scientific computing will run substantially faster. The fact that it achieves these results with a 65 W TDP and supports DDR4 memory suggests a straightforward build path.

The AMD Ryzen 7 7840U is the pick for mobile users who need a balance of single-thread responsiveness and efficiency. Its 8.2% Geekbench single-core lead and 7.5% PassMark single-thread lead indicate snappier everyday application performance. The 21.7% win in PassMark physics and 27.5% win in find prime numbers suggest it handles certain integer-heavy and physics-based tasks better. Its 28 W TDP, combined with integrated Radeon 780M graphics, makes it suitable for thin-and-light laptops where power draw and space are critical.

Neither chip is a universal winner. The 5700's 13 wins skew toward rendering and compression, while the 7840U's 10 wins cluster around single-thread and math operations. Users needing maximum multi-core throughput should choose the 5700; users needing a compact, efficient chip with competitive single-thread performance should choose the 7840U.

Architecture Differences

The two processors come from different generations and process nodes. The Ryzen 7 5700 uses Zen 3 architecture on a 7 nm TSMC process, codenamed Cezanne. The Ryzen 7 7840U uses Zen 4 architecture on a 4 nm TSMC process, codenamed Phoenix. The transistor count reflects this: the 5700 packs 10,700 million transistors on a 180 mm² die, while the 7840U contains 25,000 million transistors on a slightly smaller 178 mm² die.

Cache configurations differ in the L2 tier. Both have 64 KB of L1 per core and 16 MB of L3, but the 5700 has 512 KB of L2 per core, while the 7840U doubles that to 1 MB per core. This larger L2 cache likely contributes to the 7840U's wins in single-thread and math benchmarks.

Memory support is generation-specific. The 5700 uses DDR4 with dual-channel support and 51.2 GB/s bandwidth. The 7840U uses DDR5 with dual-channel support and 89.6 GB/s bandwidth — a 75% increase in theoretical memory bandwidth. Both support ECC memory.

The 7840U includes integrated Radeon 780M graphics, while the 5700 has no integrated graphics. The 5700 uses AMD Socket AM4 and is a desktop part with an unlocked multiplier. The 7840U uses AMD Socket FP8, is a mobile part with a locked multiplier, and has a base clock of 3.30 GHz versus the 5700's 3.70 GHz, but a higher boost clock of 5.10 GHz versus 4.60 GHz. The 7840U also supports PCIe Gen 4 with 20 lanes, while the 5700 is limited to PCIe Gen 3 with 20 lanes.

FAQ

Q: Which CPU is faster in multi-core workloads?

A: The AMD Ryzen 7 5700 wins decisively in multi-core tests. It leads by 62.4% in Cinebench R23 multi-core (20655 vs 12719), by 22.1% in 3dmark_16_threads (6628 vs 5427), and by 13.6% in Geekbench multi-core (9959 vs 8766).

Q: Which CPU has better single-thread performance?

A: The AMD Ryzen 7 7840U wins most single-thread tests. It leads by 8.2% in Geekbench single-core (2077 vs 1907) and by 7.5% in PassMark single-thread (3565 vs 3296). However, the 5700 wins Cinebench R15 single-core by 11% (293 vs 264) and R23 single-core by 73.8% (2916 vs 1677.5).

Q: What are the TDP differences?

A: The Ryzen 7 5700 has a 65 W TDP, while the Ryzen 7 7840U has a 28 W TDP. The 7840U is designed for mobile use with lower power draw, while the 5700 is a desktop part.

Q: Do both CPUs support ECC memory?

A: Yes, both the Ryzen 7 5700 and the Ryzen 7 7840U support ECC memory. They differ in memory type: the 5700 uses DDR4, while the 7840U uses DDR5.

Q: Which CPU includes integrated graphics?

A: Only the AMD Ryzen 7 7840U includes integrated graphics, specifically Radeon 780M. The AMD Ryzen 7 5700 has no integrated graphics, requiring a discrete GPU for display output.

Q: How do their overall benchmark averages compare?

A: The Ryzen 7 5700 has an average benchmark score of 25517, while the 7840U has an average of 25432. The 5700 ranks in the 78th percentile of all CPUs, while the 7840U ranks in the 77th percentile.

Where Each One Wins

The Ryzen 7 5700 wins in scenarios requiring sustained multi-threaded throughput. Its largest victories are in Cinebench R23 multi-core (62.4% ahead), 3dmark_max_threads (22.5% ahead), and 3dmark_16_threads (22.1% ahead). It also wins in data compression (9.7%), encryption (13.6%), and extended instructions (7.4%). These results point to strengths in 3D rendering, video encoding, file compression, and encryption workloads. The 5700 also wins Cinebench R15 single-core, suggesting it can handle some short single-thread bursts effectively despite its lower boost clock.

The Ryzen 7 7840U wins in scenarios that favor single-thread speed and specific math operations. Its biggest win is in PassMark find prime numbers (27.5% ahead), followed by PassMark physics (21.7% ahead). It also wins Geekbench single-core (8.2%), PassMark single-thread (7.5%), and 3dmark_single_thread (3.3%). The 7840U takes marginal wins in floating-point math (0.7%), integer math (0.8%), multithread (1.9%), and random string sorting (1.8%). These results indicate strengths in physics simulations, prime number calculations, and everyday single-threaded application responsiveness.

Specification Differences

The two CPUs differ in several key specifications. The Ryzen 7 5700 has a base clock of 3.70 GHz and a boost clock of 4.60 GHz, while the 7840U has a base clock of 3.30 GHz and a boost clock of 5.10 GHz. TDP differs significantly: 65 W for the 5700 versus 28 W for the 7840U. The 5700 uses AMD Socket AM4, while the 7840U uses AMD Socket FP8. The 5700 is a desktop part with an unlocked multiplier; the 7840U is a mobile part with a locked multiplier.

Process technology differs: the 5700 uses 7 nm TSMC, the 7840U uses 4 nm TSMC. Transistor counts are 10,700 million for the 5700 and 25,000 million for the 7840U. Die sizes are 180 mm² for the 5700 and 178 mm² for the 7840U. L2 cache per core is 512 KB for the 5700 and 1 MB for the 7840U. Memory support is DDR4 for the 5700 and DDR5 for the 7840U, with bandwidth of 51.2 GB/s versus 89.6 GB/s. PCIe support is Gen 3 for the 5700 and Gen 4 for the 7840U, both with 20 lanes. The 7840U has integrated Radeon 780M graphics; the 5700 has none. The 5700 has a launch MSRP of $179.