AMD Ryzen 5 7640HS vs AMD Ryzen 9 8945HS Comparison

Head-to-Head Benchmarks

The recorded data leaves no ambiguity: the AMD Ryzen 9 8945HS wins every single head-to-head benchmark in the database, 17 wins to zero for the AMD Ryzen 5 7640HS. The largest gaps come in heavily threaded workloads. In PassMark integer math, the Ryzen 9 scores 101226 against 73284, a 38.1% advantage. Floating point math follows closely at 36.7%, with 61821 versus 45220. Random string sorting shows a 36.5% lead (43202 vs 31654), and data encryption posts a 34.4% gap (21323 vs 15867). These are not marginal differences; they reflect a consistent performance tier separation across computational intensity.

Cinebench results tell the same story. The Ryzen 9 8945HS scores 16795 in Cinebench R23 multi-core, while the Ryzen 5 7640HS scores 12554, a 33.8% difference. Cinebench R15 multi-core shows a 33.5% gap, with 2640 versus 1978. Cinebench R23 single-core is closer but still favors the Ryzen 9: 1805 versus 1715.5, a 5.2% lead. R15 single-core shows a 4.3% gap (281 vs 269.5). The multi-core deltas are roughly six times larger than the single-core deltas, which points to core count and thread scaling as the dominant factor rather than per-clock efficiency.

Geekbench results reinforce the pattern. Multi-core scores 12276 for the Ryzen 9 against 10389 for the Ryzen 5, an 18.2% advantage. Single-core is nearly flat at 1.1% (2116 vs 2093). PassMark multithread shows 29780 versus 22979, a 29.6% gap. PassMark physics, another heavily threaded workload, shows 1434 against 1155, a 24.2% lead. Data compression follows with 356508 versus 269524, a 32.3% gap. Extended instructions land at 31.2% (26964 vs 20556), and find prime numbers at 19.5% (92 vs 77).

The only single-threaded metrics that come close are Geekbench single-core (1.1%) and Cinebench R23 single-core (5.2%). PassMark single-thread shows a 5.4% gap, 3850 versus 3654. Across every test, the Ryzen 9 8945HS is ahead, but the size of the advantage scales with thread utilization. The data indicates the Ryzen 9 is not merely a binned Ryzen 5; it is a fundamentally stronger multi-threaded part.

The Verdict

The benchmark data points to a clear choice for multi-threaded workloads: the AMD Ryzen 9 8945HS. It leads by 33.8% in Cinebench R23 multi-core and 38.1% in PassMark integer math. The 8-core, 16-thread configuration delivers a decisive advantage over the 6-core, 12-thread Ryzen 5 7640HS in every parallel workload in the database. The Ryzen 9 also holds the edge in single-core tests, though the margins are modest: 1.1% in Geekbench single-core, 5.2% in Cinebench R23 single-core, and 5.4% in PassMark single-thread.

For users whose primary workloads are lightly threaded, the Ryzen 5 7640HS is not a poor performer. Its single-core scores trail by only 1.1% to 5.4% depending on the test, and it still ranks in the 81st percentile of all CPUs in the database. The Ryzen 9 sits in the 82nd percentile. Both parts are mobile processors with active production status, and both use the same AMD Socket FP8 platform, so the socket compatibility is not a deciding factor.

The Ryzen 9 8945HS carries a 45 W TDP versus 35 W for the Ryzen 5 7640HS. That higher power envelope accompanies the extra two cores and higher boost clock of 5.20 GHz versus 5.00 GHz. The data does not support any scenario where the Ryzen 5 wins a benchmark outright, but it does support a power-conscious choice when the extra multi-threaded headroom is unnecessary. The verdict from the measurements: choose the Ryzen 9 for maximum throughput, choose the Ryzen 5 when the 35 W TDP and lighter thread demands align better with the system design.

Architecture Differences

Both processors are built on the same foundational architecture: Zen 4, fabricated on a 4 nm process at TSMC, with 25,000 million transistors and a 178 mm² die size. The codenames differ, Hawk Point for the Ryzen 9 8945HS and Phoenix for the Ryzen 5 7640HS, but the underlying node and core design are shared. Both use the AMD Socket FP8, support DDR5 memory over a dual-channel bus, and provide 89.6 GB/s of memory bandwidth. Both also expose PCIe Gen 4 with 20 lanes from the CPU.

The core and thread counts are the primary architectural differentiators. The Ryzen 9 8945HS has 8 cores and 16 threads, while the Ryzen 5 7640HS has 6 cores and 12 threads. Cache configurations are identical per core: 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The clock speeds differ: the Ryzen 9 has a 4.00 GHz base clock and 5.20 GHz boost clock, while the Ryzen 5 has a 4.30 GHz base clock and 5.00 GHz boost clock. Notably, the Ryzen 5 has a higher base clock by 0.30 GHz, but the Ryzen 9 has a higher boost clock by 0.20 GHz.

The integrated graphics differ as well. The Ryzen 9 8945HS pairs with Radeon 780M, while the Ryzen 5 7640HS uses Radeon 760M. ECC memory support is another split: the Ryzen 5 7640HS supports ECC memory, while the Ryzen 9 8945HS does not. Both processors are unlocked in terms of multiplier? No, both have multiplierUnlocked set to false. Both are mobile-segment parts in active production. The Ryzen 9 8945HS has a recorded release date of December 5, 2023, while the Ryzen 5 7640HS has no release date in the database.

Neither processor carries a launch MSRP in the database, so no pricing comparison is possible. The part numbers differ: the Ryzen 9 lists 100-000001319 (FP7r2), 100-000001383 (FP7), and 100-000001309 (FP8), while the Ryzen 5 lists 100-000000956 (FP7r2), 100-000000965 (FP7), and 100-000001130 (FP8).

FAQ

Q: Which processor wins more benchmarks in the database?

A: The AMD Ryzen 9 8945HS wins all 17 head-to-head benchmarks recorded against the AMD Ryzen 5 7640HS. The Ryzen 5 does not win a single test in the comparison set.

Q: How large is the multi-core performance gap?

A: The Ryzen 9 8945HS leads by 33.8% in Cinebench R23 multi-core, 33.5% in Cinebench R15 multi-core, and 18.2% in Geekbench multi-core. PassMark multithread shows a 29.6% advantage.

Q: Is the single-core performance meaningfully different?

A: The Ryzen 9 8945HS leads by 1.1% in Geekbench single-core, 5.2% in Cinebench R23 single-core, 5.4% in PassMark single-thread, and 4.3% in Cinebench R15 single-core. The gaps are consistent but small.

Q: Do both processors use the same socket and memory?

A: Yes, both use AMD Socket FP8, support DDR5 memory, have dual-channel memory buses, and provide 89.6 GB/s of memory bandwidth. Both also use PCIe Gen 4 with 20 lanes from the CPU.

Q: What are the core and thread counts?

A: The Ryzen 9 8945HS has 8 cores and 16 threads. The Ryzen 5 7640HS has 6 cores and 12 threads.

Q: Do the processors differ in power consumption?

A: Yes, the Ryzen 9 8945HS has a 45 W TDP, while the Ryzen 5 7640HS has a 35 W TDP.

Where Each One Wins

The AMD Ryzen 9 8945HS wins every recorded benchmark, but the magnitude of its wins defines where it excels. Multi-threaded productivity is its strongest territory. Cinebench R23 multi-core shows a 33.8% lead, PassMark integer math a 38.1% lead, and PassMark floating point math a 36.7% lead. Data encryption, data compression, and random string sorting all favor the Ryzen 9 by margins between 32.3% and 36.5%. Extended instruction workloads follow at 31.2%. These are the workloads where the extra two cores and four threads translate directly into throughput. Rendering, encoding, compilation, and scientific computing are the natural fits.

The Ryzen 9 also wins single-threaded tests, but by much smaller margins. Geekbench single-core at 1.1% and Cinebench R23 single-core at 5.2% indicate that day-to-day responsiveness, office applications, and lightly threaded software see only a minor benefit from choosing the Ryzen 9. The Ryzen 5 7640HS remains competitive in these scenarios despite its lower overall scores.

The AMD Ryzen 5 7640HS wins no benchmarks in the database, but it holds a distinct position on power. Its 35 W TDP versus 45 W for the Ryzen 9 means it fits into thinner, cooler, or more power-constrained laptop designs. Its higher base clock of 4.30 GHz versus 4.00 GHz does not translate into benchmark wins, but it does indicate a different tuning philosophy for lighter sustained loads. The Ryzen 5 also supports ECC memory, which the Ryzen 9 does not, making it the relevant choice for systems that require ECC. For users who prioritize lower power draw and ECC support over raw multi-threaded output, the Ryzen 5 7640HS is the logical selection.

Specification Differences

The two processors differ in core count: 8 cores for the Ryzen 9 8945HS versus 6 cores for the Ryzen 5 7640HS. Thread counts follow at 16 versus 12. Base clocks differ, with the Ryzen 5 7640HS at 4.30 GHz and the Ryzen 9 8945HS at 4.00 GHz. Boost clocks favor the Ryzen 9 at 5.20 GHz versus 5.00 GHz. TDP differs, 45 W for the Ryzen 9 and 35 W for the Ryzen 5. Integrated graphics differ, Radeon 780M versus Radeon 760M. ECC memory support differs, present on the Ryzen 5 and absent on the Ryzen 9. Series and generation labels differ, 8000 series and Ryzen 9 generation for the Ryzen 9, 7000 series and Ryzen 5 generation for the Ryzen 5. Codenames differ, Hawk Point versus Phoenix. Release dates differ, with the Ryzen 9 8945HS having a recorded release date and the Ryzen 5 7640HS having none. Part numbers differ across all three form factor variants. All other specifications, including socket, architecture, process node, foundry, transistor count, die size, cache layout, memory support, memory bus, memory bandwidth, PCIe configuration, production status, and unlocked multiplier status, are identical.