AMD Ryzen 5 7640HS vs AMD Ryzen 7 5800XT Comparison

The AMD Ryzen 5 7640HS and AMD Ryzen 7 5800XT are two very different CPUs sharing an AMD badge, aimed at entirely different segments of the market. The data shows a clear split: the Ryzen 7 5800XT dominates in raw multi-threaded and most single-threaded workloads, while the Ryzen 5 7640HS wins in one specific PassMark single-thread metric. This comparison highlights the trade-off between a modern, power-efficient mobile chip and a higher-core-count desktop part.

Head-to-Head Benchmarks

The benchmark results are overwhelmingly in favor of the Ryzen 7 5800XT. Out of 15 shared tests, the 5800XT wins 13, while the 7640HS wins only 2. The most dramatic difference appears in Cinebench R23 multi-core, where the 5800XT scores 23,794 against the 7640HS's 12,554. That is a 47.2% deficit for the 7640HS, making the 5800XT nearly twice as fast in heavily threaded rendering workloads. The single-core Cinebench R23 result tells a similar story, with the 5800XT scoring 3,359 versus 1,715.5 for the 7640HS, a 48.9% gap. This is a massive lead for the desktop part.

The 5800XT’s advantage extends across nearly every PassMark sub-test. In data compression, it scores 352,002 against 269,524, a 23.4% lead. Data encryption shows a 26.1% advantage (21,461 vs. 15,867). Integer math favors the 5800XT by 22% (93,942 vs. 73,284), and floating-point math by 16% (53,808 vs. 45,220). The 5800XT is also 35.3% faster in the find prime numbers test (119 vs. 77) and 18.1% faster in the overall PassMark multithread score (28,053 vs. 22,979). Even in physics, the 5800XT leads by 14.8% (1,355 vs. 1,155).

The 7640HS does manage one narrow win. In the PassMark single-thread test, it scores 3,654 against the 5800XT’s 3,535, a 3.4% advantage. This is a small but notable victory, suggesting that the newer Zen 4 architecture has a slight edge in lightly threaded, latency-sensitive tasks. However, this win is isolated. In the Cinebench R15 single-core test, the 5800XT wins by 20.3% (338 vs. 269.5), which contradicts the PassMark result. The overall picture is clear: the 5800XT is the performance king in this pairing, with the 7640HS only edging out a single niche benchmark.

Architecture Differences

The two processors are built on fundamentally different architectures and process nodes. The Ryzen 5 7640HS is a Zen 4 part, codenamed Phoenix, built on a 4 nm process from TSMC. It packs 25,000 million transistors into a 178 mm² die. In contrast, the Ryzen 7 5800XT is a Zen 3 part, codenamed Vermeer, built on a 7 nm process. It has only 4,150 million transistors on a much smaller 74 mm² die. This process difference is the core reason for the 7640HS’s efficiency, but it also limits its raw performance ceiling.

Core counts differ significantly. The 7640HS has 6 cores and 12 threads, while the 5800XT has 8 cores and 16 threads. This 33% increase in cores and threads for the 5800XT is a primary driver of its multi-threaded dominance. Cache configurations also differ. Both have 64 KB of L1 per core, but the 7640HS has 1 MB of L2 per core, double the 512 KB per core of the 5800XT. However, the 5800XT has 32 MB of shared L3 cache, double the 16 MB shared L3 on the 7640HS.

The memory support is a major divergence. The 7640HS uses DDR5 memory with dual-channel support and a bandwidth of 89.6 GB/s. The 5800XT uses DDR4 memory, also dual-channel, but with a much lower bandwidth of 51.2 GB/s. Both support ECC memory. The integrated graphics also differ: the 7640HS includes a Radeon 760M iGPU, while the 5800XT has no integrated graphics (N/A). The 7640HS is built for the AMD Socket FP8, while the 5800XT uses the desktop AMD Socket AM4. The 5800XT has an unlocked multiplier, whereas the 7640HS is locked.

Where Each One Wins

The Ryzen 7 5800XT wins in almost every scenario where multi-threading matters. Cinebench R23 multi-core shows a 47.2% lead, making it the clear choice for video rendering, 3D modeling, and batch processing. The data compression and encryption wins (23.4% and 26.1% respectively) indicate it handles file archiving and disk encryption workloads with noticeably more headroom. The 22% lead in integer math and 16% lead in floating-point math point to advantages in scientific computing, financial modeling, and other number-crunching tasks. The 35.3% advantage in prime number finding reinforces this, showing strength in pure computational throughput.

The Ryzen 5 7640HS wins only in the PassMark single-thread test, with a 3.4% edge. This suggests it can feel snappier in tasks that rely on a single core’s responsiveness, such as basic desktop navigation, opening applications, or light office work. However, this advantage is marginal and does not appear in the Cinebench R15 single-core test, where the 5800XT leads by 20.3%. The 7640HS also has the benefit of an integrated Radeon 760M GPU, which the 5800XT lacks entirely. This makes the 7640HS a viable option for a compact system without a discrete graphics card, while the 5800XT requires a dedicated GPU to output any video.

Specification Differences

The specification sheets show two processors with distinct targets. The 7640HS has a base clock of 4.30 GHz and a boost clock of 5.00 GHz, both higher than the 5800XT’s 3.80 GHz base and 4.80 GHz boost. Despite the higher clocks, the 7640HS has a TDP of just 35 watts, while the 5800XT has a TDP of 105 watts. This reflects the mobile nature of the 7640HS (market segment: Mobile) versus the desktop positioning of the 5800XT (market segment: Desktop). The 7640HS is from the 7000 series, while the 5800XT is from the 5000 series.

The socket is a critical differentiating factor. The 7640HS uses AMD Socket FP8, which is a mobile-only socket, while the 5800XT uses the long-lived AMD Socket AM4 for desktop boards. The 5800XT supports DDR4 memory, while the 7640HS supports DDR5. The 5800XT was released on 2024-07-30 and has a launch MSRP of $249, while the 7640HS has no listed release date or MSRP in the data. The 5800XT has an unlocked multiplier for overclocking, and the 7640HS does not. The process node differences (4 nm vs. 7 nm), transistor counts (25,000 million vs. 4,150 million), and die sizes (178 mm² vs. 74 mm²) are also major specification differences.

FAQ

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

A: The AMD Ryzen 7 5800XT is significantly faster. In Cinebench R23 multi-core, it scores 23,794 against the 7640HS’s 12,554, a 47.2% advantage. It also leads by 18.1% in PassMark multithread (28,053 vs. 22,979).

Q: Does the Ryzen 5 7640HS win anywhere?

A: Yes, but only narrowly. The 7640HS wins the PassMark single-thread test with a score of 3,654 versus 3,535 for the 5800XT, a 3.4% edge. It loses the Cinebench R15 single-core test by 20.3%.

Q: What are the core and thread counts?

A: The Ryzen 5 7640HS has 6 cores and 12 threads. The Ryzen 7 5800XT has 8 cores and 16 threads.

Q: Can either CPU be overclocked?

A: The Ryzen 7 5800XT has an unlocked multiplier, allowing for overclocking. The Ryzen 5 7640HS does not have an unlocked multiplier.

Q: Do these CPUs have integrated graphics?

A: The 7640HS includes a Radeon 760M integrated GPU. The 5800XT has no integrated graphics (N/A), so it requires a discrete graphics card.

Q: How do their memory supports differ?

A: The 7640HS supports DDR5 memory with a bandwidth of 89.6 GB/s. The 5800XT supports DDR4 memory with a bandwidth of 51.2 GB/s. Both are dual-channel and support ECC.

The Verdict

The data is unambiguous. The AMD Ryzen 7 5800XT is the superior performer in nearly every benchmark measured. Its 47.2% lead in Cinebench R23 multi-core, 48.9% lead in Cinebench R23 single-core, and 35.3% lead in prime number finding make it the clear choice for anyone who needs raw processing power for rendering, scientific computing, or heavy multitasking. The 5800XT’s 8 cores and 16 threads, combined with its 32 MB of L3 cache, provide a substantial advantage over the 7640HS’s 6 cores and 16 MB of L3 cache.

The Ryzen 5 7640HS is not without merit, but its strengths lie elsewhere. Its 3.4% win in PassMark single-thread suggests a slight edge in light, single-threaded tasks, but this is too small to offset the massive losses elsewhere. Its real advantages are its 35-watt TDP and integrated Radeon 760M GPU, making it suitable for a low-power, compact laptop or mini-PC where a discrete GPU is not an option. The 5800XT, with its 105-watt TDP and no iGPU, is a desktop part that assumes a dedicated graphics card is present.

For a desktop builder prioritizing performance, the Ryzen 7 5800XT is the obvious pick. It offers a 22% lead in integer math and a 23.4% lead in data compression, which translates to tangible benefits in many productivity workloads. The Ryzen 5 7640HS is a specialized mobile chip that trades significant performance for efficiency and integrated graphics. The data shows that in a direct head-to-head, the 5800XT wins 13 out of 15 tests, with a combined score advantage that is decisive. The 7640HS only wins in the niche PassMark single-thread test, and even that win is by a tiny margin. Choose the 5800XT for performance, and the 7640HS only if the mobile form factor and iGPU are non-negotiable.