AMD Ryzen 5 7640HS vs AMD Ryzen 7 8845HS Comparison

The AMD Ryzen 5 7640HS and AMD Ryzen 7 8845HS are both mobile processors built on the same Zen 4 architecture and 4 nm TSMC process, yet they target different performance tiers within the same socket. The data shows a clear hierarchy: the Ryzen 7 8845HS wins 16 of 17 head-to-head benchmark comparisons, with the Ryzen 5 7640HS securing only a single victory in Geekbench single-core testing. Despite this, both processors occupy the same 81st percentile among all CPUs, indicating that the Ryzen 5 7640HS remains a highly competitive option in its own right, albeit with a different performance profile.

FAQ

Q: Which processor has a higher base clock speed?

A: The AMD Ryzen 5 7640HS has a base clock of 4.30 GHz, while the AMD Ryzen 7 8845HS has a lower base clock of 3.80 GHz.

Q: What is the largest performance gap between the two in any benchmark?

A: The largest gap is in PassMark integer math, where the Ryzen 7 8845HS scores 97,747 compared to 73,284 for the Ryzen 5 7640HS, a difference of 25% favoring the Ryzen 7.

Q: Does the Ryzen 5 7640HS ever outperform the Ryzen 7 8845HS?

A: Yes, in Geekbench single-core, the Ryzen 5 7640HS scores 2093 versus 2081 for the Ryzen 7 8845HS, a 0.6% advantage for the Ryzen 5.

Q: How do the two processors compare in multi-threaded Cinebench R23 performance?

A: The Ryzen 7 8845HS scores 16,192 in Cinebench R23 multi-core, which is 22.5% higher than the Ryzen 5 7640HS's score of 12,554.

Q: Are both processors built on the same manufacturing process?

A: Yes, both the Ryzen 5 7640HS and the Ryzen 7 8845HS use a 4 nm process node fabricated by TSMC, with the same 25,000 million transistors and 178 mm² die size.

Q: What is the difference in their integrated graphics?

A: The Ryzen 5 7640HS features a Radeon 760M, while the Ryzen 7 8845HS comes with a Radeon 780M, indicating a step up in integrated graphics capability for the Ryzen 7.

Architecture Differences

Both processors share the same fundamental Zen 4 architecture, but they are positioned in different series and codenames. The Ryzen 5 7640HS belongs to the 7000 series with the codename Phoenix, while the Ryzen 7 8845HS is part of the 8000 series with the codename Hawk Point. This difference in codename reflects a generational refresh, though the underlying architecture remains Zen 4 for both.

The core configuration is a primary differentiator. The Ryzen 5 7640HS packs 6 cores and 12 threads, while the Ryzen 7 8845HS scales up to 8 cores and 16 threads. This is a direct 33% increase in core count for the Ryzen 7, which is the primary driver of its multi-threaded performance advantage. The cache hierarchy is identical, with 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3 cache.

Clock speeds differ in an interesting manner. The Ryzen 5 7640HS has a higher base clock at 4.30 GHz, but the Ryzen 7 8845HS has a higher boost clock at 5.10 GHz versus 5.00 GHz. This explains why the Ryzen 7 can edge out the Ryzen 5 in most single-threaded tests despite the Ryzen 5's higher base frequency. The thermal design power (TDP) also differs, with the Ryzen 5 rated at 35 watts and the Ryzen 7 at 45 watts, reflecting the additional power budget required for the extra cores.

Both processors support DDR5 memory with dual-channel configuration and identical 89.6 GB/s memory bandwidth. The PCIe implementation is also the same: Gen 4 with 20 lanes from the CPU. The Ryzen 5 7640HS supports ECC memory, while the Ryzen 7 8845HS does not list ECC support, a notable distinction for certain professional workloads. Both use the AMD Socket FP8, and neither has an unlocked multiplier.

Head-to-Head Benchmarks

The benchmark data overwhelmingly favors the Ryzen 7 8845HS, with the Ryzen 5 7640HS winning only a single test. In Cinebench R23 multi-core, the Ryzen 7 scores 16,192 against the Ryzen 5's 12,554, a 22.5% advantage. This gap is consistent across other multi-threaded workloads. Cinebench R15 multi-core shows a 23.2% lead for the Ryzen 7 (2575 vs 1978), while Geekbench multi-core shows a 14.9% edge (12,212 vs 10,389).

PassMark integer math delivers the largest margin, with the Ryzen 7 scoring 97,747 versus 73,284, a 25% difference. Floating-point math follows closely at 23.7% (59,254 vs 45,220), and random string sorting shows a 23.6% gap (41,446 vs 31,654). Data compression and encryption also favor the Ryzen 7 substantially, with 21.7% and 22.3% leads respectively.

The single-threaded results are much tighter. The Ryzen 7 wins Cinebench R23 single-core by only 3% (1769 vs 1715.5) and Cinebench R15 single-core by 2.4% (276 vs 269.5). PassMark single-thread shows a 2.2% advantage for the Ryzen 7 (3738 vs 3654). The sole exception is Geekbench single-core, where the Ryzen 5 7640HS scores 2093 versus 2081, a 0.6% win for the Ryzen 5.

The Ryzen 7 also wins in specialized workloads. PassMark extended instructions show a 19.8% lead (25,642 vs 20,556), and find prime numbers shows an 11.5% edge (87 vs 77). PassMark physics demonstrates a 14.3% advantage (1347 vs 1155), and the overall PassMark multithread score favors the Ryzen 7 by 19.4% (28,498 vs 22,979).

Specification Differences

The core count is the most significant specification difference: 6 cores and 12 threads for the Ryzen 5 7640HS versus 8 cores and 16 threads for the Ryzen 7 8845HS. This directly impacts all multi-threaded performance. The base clock differs, with the Ryzen 5 at 4.30 GHz and the Ryzen 7 at 3.80 GHz, a 0.50 GHz gap in favor of the Ryzen 5. However, the boost clock reverses the comparison, with the Ryzen 7 reaching 5.10 GHz versus 5.00 GHz for the Ryzen 5.

The TDP rating is another clear differentiator: 35 watts for the Ryzen 5 versus 45 watts for the Ryzen 7. This 10-watt difference reflects the higher power ceiling of the Ryzen 7, enabling its higher boost frequency and sustained multi-core performance. The integrated graphics differ as well, with the Ryzen 5 featuring a Radeon 760M and the Ryzen 7 featuring a Radeon 780M.

ECC memory support is present on the Ryzen 5 7640HS but not on the Ryzen 7 8845HS. The series and codename also differ, with the Ryzen 5 in the 7000 series (Phoenix) and the Ryzen 7 in the 8000 series (Hawk Point). The release date is only provided for the Ryzen 7 8845HS, which is 2023-12-05. Both processors share identical cache, memory bandwidth, PCIe lanes, socket, process node, transistor count, and die size.

Where Each One Wins

The Ryzen 7 8845HS is the clear winner for multi-threaded workloads. Its 8-core, 16-thread configuration delivers decisive advantages in Cinebench R23 multi-core (22.5% ahead), PassMark integer math (25% ahead), and floating-point math (23.7% ahead). This makes it the better choice for content creation, 3D rendering, video encoding, and any heavily threaded productivity task. The 19.4% lead in PassMark multithread reinforces its suitability for parallel computing scenarios.

The Ryzen 7 also wins in most single-threaded tests, albeit by smaller margins. Its boost clock of 5.10 GHz gives it a 2.2% to 3% edge in Cinebench and PassMark single-thread tests. This means it is also slightly faster for everyday responsiveness and lightly threaded applications, despite its lower base clock. The advantage in PassMark data compression (21.7%) and encryption (22.3%) makes it the better choice for file archiving and security-related workloads.

The Ryzen 5 7640HS has a narrow but real victory in Geekbench single-core, scoring 0.6% higher than the Ryzen 7. This single result does not offset the Ryzen 7's wins elsewhere, but it does indicate that the Ryzen 5's higher base clock of 4.30 GHz can occasionally translate into a slight edge in specific single-threaded scenarios. Its lower 35-watt TDP also suggests it may be more power-efficient in lightly loaded situations, though the benchmark data does not explicitly measure power consumption.

For users who prioritize multi-core performance, the Ryzen 7 8845HS is the definitive choice, with 16 of 17 benchmark wins and margins ranging from 0.6% to 25%. The Ryzen 5 7640HS remains a capable processor, particularly for users who value its ECC memory support or its slight Geekbench single-core edge, but the data indicates that the Ryzen 7 offers a substantially stronger overall performance profile.