AMD Ryzen 7 2700X vs AMD Ryzen 7 7840HS Comparison

FAQ

Q: Which processor is faster in multi-threaded workloads?

A: The AMD Ryzen 7 7840HS wins all 15 head-to-head benchmark comparisons. Its most decisive multi-threaded victory is in Cinebench R15 multicore, where it scores 2222.84 versus the 2700X's 1762, a 20.7% advantage. In Geekbench multicore, the 7840HS leads by 40.5% (11846 vs 7045).

Q: How much better is the Ryzen 7 7840HS in single-core performance?

A: The 7840HS dominates single-core tests. In Cinebench R15 single-core, it scores 274 versus 175.7 for the 2700X, a 35.9% gap. Geekbench single-core shows a 38.6% lead (2031 vs 1248), and PassMark single-thread tests show 3753 vs 2417, a 35.6% difference.

Q: What is the biggest performance gap between the two processors?

A: The largest delta is in PassMark extended instructions, where the 7840HS scores 25747 versus 10155 for the 2700X, a 60.6% advantage. The second-largest gap is in PassMark find prime numbers, with the 7840HS at 88 versus 41, a 53.4% lead.

Q: Do both processors have the same core and thread counts?

A: Yes, both have 8 cores and 16 threads. However, the 7840HS uses Zen 4 architecture on a 4 nm TSMC process, while the 2700X uses Zen+ architecture on a 12 nm GlobalFoundries process. The 7840HS also has a higher boost clock of 5.10 GHz versus 4.35 GHz.

Q: Which processor has better memory support?

A: The Ryzen 7 7840HS supports DDR5 memory with dual-channel bandwidth of 89.6 GB/s, while the 2700X supports DDR4 with 46.9 GB/s. The 7840HS also features ECC memory support, which the 2700X lacks.

Q: What is the thermal design power (TDP) difference?

A: The 7840HS has a TDP of 35 watts, while the 2700X has a TDP of 105 watts. This makes the 7840HS significantly more power-efficient despite delivering higher performance across every benchmark.

The Verdict

The data is unambiguous: the AMD Ryzen 7 7840HS outperforms the AMD Ryzen 7 2700X in every single benchmark recorded, winning all 15 head-to-head tests. There is no workload category where the 2700X emerges victorious. The 7840HS achieves this with a 35W TDP compared to the 2700X's 105W, meaning it delivers substantially higher performance while consuming far less power.

For desktop builders, the 2700X is an older generation part with a socket AM4 platform and an unlocked multiplier. It launched at $329 MSRP and remains in active production. However, its benchmark scores are consistently 17.9% to 60.6% lower than the 7840HS across identical tests.

For mobile users, the 7840HS is the clear choice. It is a mobile-segment processor with an integrated Radeon 780M GPU, supports DDR5 memory, and offers PCIe Gen 4 with 20 lanes. Its single-core performance is roughly 35-39% higher, and its multi-core performance is 20-40% higher, depending on the benchmark.

The verdict is straightforward: if you require maximum performance in both single-threaded and multi-threaded tasks, the 7840HS is the superior processor. The 2700X's only advantages are its unlocked multiplier for overclocking and its desktop socket, but the benchmark data shows no performance category where it leads.

Head-to-Head Benchmarks

The Ryzen 7 7840HS wins every benchmark in the comparison, but the margins vary significantly by workload. The smallest gap is in PassMark data encryption, where the 7840HS scores 20627 versus 16929, a 17.9% lead. This suggests that encryption workloads are relatively more balanced between the two architectures.

The largest advantage appears in PassMark extended instructions (60.6% lead) and PassMark find prime numbers (53.4% lead). These tests highlight the 7840HS's superior instruction handling and arithmetic capabilities, likely stemming from its Zen 4 architecture and higher boost clock.

In Cinebench R15 multicore, the 7840HS scores 2222.84 versus 1762, a 20.7% advantage. This is one of the smaller multi-threaded gaps, suggesting that the 2700X's 8-core/16-thread configuration remains competitive in pure throughput, but the newer architecture still pulls ahead.

Geekbench results show a stark contrast: multicore scores favor the 7840HS by 40.5% (11846 vs 7045), and single-core by 38.6% (2031 vs 1248). These are substantial margins that indicate the 7840HS's IPC improvements are significant.

PassMark multithread scores show a 39% gap (28633 vs 17468), while PassMark physics shows a 42.4% gap (1376 vs 792). Floating-point math favors the 7840HS by 45.7% (59921 vs 32563), and integer math by 35.7% (98682 vs 63485).

Data compression tests show a 23% gap (345536 vs 266134), and random string sorting shows a 24.3% gap (40364 vs 30563). These memory-intensive workloads benefit from the 7840HS's higher memory bandwidth of 89.6 GB/s versus 46.9 GB/s.

Specification Differences

The Ryzen 7 7840HS and Ryzen 7 2700X differ across nearly every specification. The 7840HS has a base clock of 3.80 GHz and boost clock of 5.10 GHz, compared to 3.70 GHz and 4.35 GHz for the 2700X. The TDP is dramatically different: 35W for the 7840HS versus 105W for the 2700X.

The 7840HS uses socket FP8, while the 2700X uses socket AM4. Memory support differs: DDR5 for the 7840HS, DDR4 for the 2700X. Memory bandwidth is 89.6 GB/s versus 46.9 GB/s. ECC memory is supported on the 7840HS but not the 2700X.

PCIe support differs: the 7840HS offers Gen 4 with 20 lanes (CPU only), while the 2700X offers Gen 3 with 16 lanes. The 7840HS includes integrated graphics (Radeon 780M), while the 2700X has no integrated graphics. The multiplier is unlocked on the 2700X but locked on the 7840HS.

The launch MSRP of the 2700X was $329. The 7840HS has no recorded launch MSRP in the data. The 2700X is a desktop part; the 7840HS is a mobile part. Both are in active production.

Architecture Differences

The architectural divide is substantial. The 2700X uses the Zen+ architecture (codename Zen, Pinnacle Ridge) built on a 12 nm process at GlobalFoundries. The 7840HS uses the Zen 4 architecture (codename Phoenix) built on a 4 nm process at TSMC. This process shrink is a major factor in the 7840HS's efficiency and performance advantage.

Transistor counts differ enormously: the 7840HS integrates 25,000 million transistors on a 178 mm² die, while the 2700X has 4,800 million transistors on a 213 mm² die. This reflects the density advantage of the 4 nm node and the more complex Zen 4 design.

Cache configurations differ: the 2700X has 96 KB L1 per core and 512 KB L2 per core, while the 7840HS has 64 KB L1 per core and 1 MB L2 per core. Both have 16 MB shared L3 cache. The larger L2 cache on the 7840HS likely contributes to its performance in cache-sensitive workloads.

The 7840HS belongs to the 7000 series and Zen 4 (Phoenix) generation, while the 2700X belongs to the 2000 series and Zen+ (Pinnacle Ridge) generation. The 7840HS's integrated Radeon 780M graphics provide a significant feature advantage for mobile systems without discrete GPUs.

Where Each One Wins

The Ryzen 7 7840HS wins in every measured benchmark category. There is no test where the 2700X takes the lead. The 7840HS's advantages span single-threaded performance (35.6% to 38.6% gaps), multi-threaded performance (20.7% to 40.5% gaps), and specialized workloads like extended instructions (60.6% lead) and prime number finding (53.4% lead).

The 7840HS is the clear choice for users prioritizing raw performance in both single-threaded and multi-threaded applications. Its higher boost clock of 5.10 GHz and superior IPC from Zen 4 architecture make it ideal for productivity, content creation, and general computing. Its 35W TDP also makes it suitable for thin-and-light laptops.

The 2700X, while losing all benchmark comparisons, retains its desktop-oriented advantages: socket AM4 compatibility, an unlocked multiplier for enthusiast overclocking, and a $329 launch MSRP. For users with existing AM4 platforms, it remains a viable upgrade path, but the data shows it is outclassed by the 7840HS in every performance metric.

For mobile users, the 7840HS is the only sensible choice given its integrated graphics, lower TDP, and superior scores. For desktop users, the 2700X's unlocked multiplier and desktop socket may appeal to overclockers, but the 7840HS's performance lead is so consistent that it would be the recommended processor for anyone who can accommodate its FP8 socket and mobile platform.