AMD Ryzen 5 7645HX vs Intel Core Ultra 7 165H Comparison

The Intel Core Ultra 7 165H and AMD Ryzen 5 7645HX are both mobile processors aimed at high-performance laptops, yet the benchmark data reveals two distinctly different personalities. Intel’s part leverages a 16-core, 22-thread configuration to dominate heavily threaded workloads, while AMD’s 6-core, 12-thread Zen 4 chip counters with superior single-core and efficiency in specific tasks. The head-to-head results show AMD winning 10 of 15 benchmarks, but Intel’s victories are often by larger margins, creating a nuanced picture for potential buyers.

Head-to-Head Benchmarks

The most decisive Intel win comes in PassMark floating-point math, where the Core Ultra 7 165H scores 66,273 against AMD’s 48,798, a 35.8% advantage. This suggests a significant edge in scientific computing and financial modeling that rely on FPU throughput. Intel also dominates integer math with a 15.5% lead (89,415 vs. 77,432), indicating stronger general-purpose arithmetic processing. In multi-core Cinebench tests, Intel maintains its lead: R15 multi-core shows 2,641 vs. 2,276 (16% ahead), and R23 multi-core shows 14,551 vs. 13,985 (4% ahead). The physics workload also favors Intel, scoring 1,806 vs. 1,497, a 20.6% improvement.

AMD’s wins are more numerous but generally narrower. The largest AMD victory is in PassMark find prime numbers, where it scores 178 vs. Intel’s 118, a 33.7% margin—likely reflecting Zen 4’s strong integer division and branch prediction. AMD also excels in extended instructions (22,969 vs. 17,299, a 24.7% lead), which points to better SIMD and cryptography performance. Single-core tests consistently favor AMD: Cinebench R15 single-core shows 289 vs. 257 (11.1% ahead), R23 single-core shows 1,809 vs. 1,759 (2.8% ahead), and PassMark single-thread shows 3,907 vs. 3,509 (10.2% ahead). In data compression, AMD wins 302,256 vs. 291,161 (3.7% ahead), and in data encryption it takes 17,900 vs. 17,169 (4.1% ahead). The PassMark multithread score is nearly a tie, with AMD at 26,476 vs. Intel’s 25,933 (2.1% ahead), while random string sorting also goes AMD’s way (34,434 vs. 33,473, 2.8% ahead).

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core Ultra 7 165H has an average benchmark score of 34,083, while the AMD Ryzen 5 7645HX sits at 33,668. Both place in the 84th percentile of all CPUs, but Intel’s average is 1.2% higher.

Q: How do the two compare in single-threaded performance?

A: AMD wins every single-thread test. In PassMark single-thread, it scores 3,907 vs. 3,509 (10.2% ahead), and in Cinebench R23 single-core it scores 1,809 vs. 1,759 (2.8% ahead). The R15 single-core gap is larger at 11.1% (289 vs. 257).

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

A: The largest delta is in PassMark floating-point math, where Intel leads by 35.8% (66,273 vs. 48,798). The second-largest is AMD’s 33.7% lead in find prime numbers (178 vs. 118).

Q: Are these processors comparable in multithreaded workloads?

A: Yes, but with caveats. In Cinebench R23 multi-core, Intel wins by 4% (14,551 vs. 13,985), yet AMD wins PassMark multithread by 2.1% (26,476 vs. 25,933). This suggests the two trade blows depending on the specific workload characteristics.

Q: Which chip has better data compression and encryption performance?

A: AMD outperforms Intel in both. Data compression scores 302,256 vs. 291,161 (3.7% ahead), and data encryption scores 17,900 vs. 17,169 (4.1% ahead). These are modest but consistent advantages.

Q: How do their launch dates affect the comparison?

A: The AMD Ryzen 5 7645HX was released on 2023-01-03, while the Intel Core Ultra 7 165H launched on 2023-12-13. The nearly one-year gap means Intel had more time to refine its architecture, yet AMD’s older design still holds its own in single-core tests.

The Verdict

The data suggests that the Intel Core Ultra 7 165H is the better choice for users prioritizing raw multi-threaded compute, particularly in floating-point and integer math. Its 16 cores and 22 threads provide a clear advantage in Cinebench R15 multi-core (16% ahead) and physics simulations (20.6% ahead). However, the AMD Ryzen 5 7645HX is superior for single-threaded responsiveness and specialized instruction workloads, winning 10 of 15 benchmarks. The AMD chip’s 33.7% lead in prime number finding and 24.7% lead in extended instructions make it attractive for cryptography and SIMD-heavy applications. Given that both sit in the 84th percentile, the choice hinges on workload: Intel for heavy parallel compute, AMD for mixed single-thread and specialized tasks.

Specification Differences

The most glaring difference is core count: Intel has 16 cores and 22 threads, while AMD has 6 cores and 12 threads. Base clocks differ slightly, with AMD at 4.00 GHz vs. Intel’s 3.80 GHz, though both boost to 5.00 GHz. Thermal design power (TDP) also diverges: Intel is rated at 28W, AMD at 45W, indicating Intel is designed for thinner, cooler systems. Cache layouts vary: Intel uses 112 KB L1 and 2 MB L2 per core with 24 MB shared L3, while AMD uses 64 KB L1 and 1 MB L2 per core but a larger 32 MB shared L3. Memory bandwidth favors Intel (89.6 GB/s vs. 83.2 GB/s), though AMD supports ECC memory while Intel does not. PCIe lanes differ significantly: AMD offers Gen 5 with 28 lanes, Intel only 8 lanes (CPU only). Integrated graphics also differ (Arc Xe-LPG 128EU vs. Radeon 610M), and the launch MSRP for Intel is $460, while AMD’s is not listed.

Architecture Differences

Intel’s Core Ultra 7 165H is built on Meteor Lake architecture using a 7 nm process from Intel’s own foundry. It features 16 cores and 22 threads, a hybrid design that balances performance and efficiency cores. The chip includes an Arc Xe-LPG 128EU integrated GPU, suggesting stronger iGPU performance. AMD’s Ryzen 5 7645HX uses Zen 4 architecture on a 5 nm process from TSMC, with 6 cores and 12 threads. It has a smaller die size of 71 mm² and 6,570 million transistors, whereas Intel’s transistor count is not listed. AMD’s design prioritizes higher clock speeds per core and includes ECC memory support. The process node difference (7 nm vs. 5 nm) likely explains AMD’s single-core efficiency, while Intel’s larger core count compensates in multi-threaded tasks. Both support DDR5 memory, but Intel’s memory support is noted as dependent on the motherboard, while AMD’s is standard DDR5.

Where Each One Wins

Intel Core Ultra 7 165H wins in workloads that leverage parallel processing and heavy arithmetic. The 35.8% lead in floating-point math makes it ideal for scientific simulations, 3D rendering, and financial risk modeling. Its 15.5% advantage in integer math suits database indexing and integer-heavy algorithms. Cinebench R15 multi-core’s 16% lead indicates strong performance in video encoding and 3D rendering applications that scale across cores. Physics scores (20.6% ahead) point to advantage in gaming physics and engineering simulations. This chip is better suited for content creation, video editing, and any task that can utilize all 22 threads.

AMD Ryzen 5 7645HX wins in single-threaded and specialized workloads. The 10.2% lead in PassMark single-thread and 11.1% lead in Cinebench R15 single-core translate to snappier everyday responsiveness, faster web browsing, and better performance in lightly-threaded applications. The 33.7% lead in prime number finding and 24.7% lead in extended instructions make it superior for cryptography, compression algorithms, and SIMD-optimized code. Data compression (3.7% ahead) and encryption (4.1% ahead) wins further cement its role in security and data handling tasks. The 45W TDP suggests it may sustain higher clocks under sustained loads, benefiting professional software that is not fully multi-threaded. This chip is better for developers, security researchers, and users who value single-core speed over raw core counts.