AMD Ryzen 5 8645HS vs Intel Core Ultra 7 165H Comparison

FAQ

Q: Which processor is faster in multi-core Cinebench tests?

A: The Intel Core Ultra 7 165H wins all three multi-core Cinebench tests. It scores 2641 in Cinebench R15 multi-core versus 2094 for the AMD Ryzen 5 8645HS, a 26.1% advantage. In Cinebench R23 multi-core, the Intel chip scores 14551 versus 13220, a 10.1% lead.

Q: Does the AMD Ryzen 5 8645HS win any benchmark categories?

A: Yes. The AMD processor wins four of the fifteen head-to-head benchmarks. It takes Cinebench R15 single-core (270 vs 257, a 4.8% lead), PassMark extended instructions (20003 vs 17299, a 13.5% lead), and PassMark single-thread tests (3653 vs 3509, a 3.9% lead). Both PassMark single-thread entries record the same result for AMD.

Q: What is the largest performance gap between these two processors?

A: The biggest delta is in PassMark physics, where the Intel Core Ultra 7 165H scores 1806 versus 1095 for the AMD Ryzen 5 8645HS, a 64.9% advantage. The second largest gap is PassMark find prime numbers, with Intel at 118 versus AMD at 75, a 57.3% lead.

Q: How do their average benchmark scores compare?

A: The Intel Core Ultra 7 165H has an average benchmark score of 34083, placing it at the 84th percentile of all CPUs. The AMD Ryzen 5 8645HS has an average score of 33244, placing it at the 83rd percentile. The difference between their average scores is roughly 2.5%.

Q: What are the core and thread counts for each chip?

A: The Intel Core Ultra 7 165H has 16 cores and 22 threads. The AMD Ryzen 5 8645HS has 6 cores and 12 threads. Despite having fewer cores, the AMD chip holds its own in single-threaded workloads.

Q: Which processor has a higher base clock speed?

A: The AMD Ryzen 5 8645HS has a higher base clock of 4.30 GHz compared to 3.80 GHz for the Intel Core Ultra 7 165H. Both processors share the same 5.00 GHz boost clock.

The Verdict

The data points to a clear split based on workload type. The Intel Core Ultra 7 165H wins 11 of the 15 head-to-head benchmarks, with its largest advantages coming in multi-core and math-heavy tasks. The AMD Ryzen 5 8645HS wins only four benchmarks, but those wins are concentrated in single-threaded and extended instruction workloads.

For users prioritizing multi-threaded productivity, content creation, or physics simulations, the Intel chip is the stronger choice. Its 16 cores and 22 threads provide substantial headroom over the 6-core, 12-thread AMD part. The Intel chip is 26.1% faster in Cinebench R15 multi-core and 64.9% faster in PassMark physics.

For users who spend most time in single-threaded applications, legacy software, or tasks that rely on extended instruction sets, the AMD Ryzen 5 8645HS is competitive. It leads by 4.8% in Cinebench R15 single-core and by 13.5% in PassMark extended instructions. The AMD chip also delivers a higher base clock, which can benefit lightly threaded workloads.

The average benchmark scores tell a similar story: the Intel chip sits at 34083 versus 33244 for AMD, a modest overall edge. The percentile ranking is close as well, with Intel at 84 and AMD at 83. Neither processor dominates the other across the board, but the Intel part wins more categories and wins by larger margins in most of them.

Head-to-Head Benchmarks

The Intel Core Ultra 7 165H establishes its dominance early in the Cinebench suite. In Cinebench R15 multi-core, it scores 2641 against 2094, a 26.1% margin. The gap narrows in Cinebench R23 multi-core, where Intel scores 14551 against 13220, a 10.1% lead. In Cinebench R23 single-core, Intel edges ahead with 1759 versus 1714, a 2.6% advantage.

The AMD Ryzen 5 8645HS takes one single-core Cinebench test. In Cinebench R15 single-core, AMD scores 270 versus 257, a 4.8% win. This is the only Cinebench test where AMD comes out ahead.

PassMark results amplify Intel's multi-core strength. The largest margin in the entire comparison is PassMark physics: Intel scores 1806 versus 1095, a 64.9% lead. PassMark find prime numbers shows a 57.3% advantage for Intel (118 vs 75). PassMark floating point math gives Intel a 47.8% lead (66273 vs 44833). PassMark integer math is closer but still favors Intel, 89415 versus 72640, a 23.1% margin.

PassMark multithread shows Intel at 25933 versus 22586, a 14.8% lead. PassMark data encryption gives Intel a 10.1% advantage (17169 vs 15588). PassMark data compression is a 9.7% win for Intel (291161 vs 265483). PassMark random string sorting is the narrowest Intel win at 5.4% (33473 vs 31748).

AMD's wins in PassMark are fewer but notable. PassMark extended instructions goes to AMD, 20003 versus 17299, a 13.5% margin. PassMark single-thread shows AMD at 3653 versus 3509, a 3.9% lead. The two PassMark single-thread entries are identical and both favor AMD.

Specification Differences

The core and thread counts differ substantially. The Intel Core Ultra 7 165H has 16 cores and 22 threads, while the AMD Ryzen 5 8645HS has 6 cores and 12 threads. Base clocks also differ: Intel runs at 3.80 GHz, AMD at 4.30 GHz. Both share a 5.00 GHz boost clock.

Thermal design power differs as well. The Intel chip has a TDP of 28 watts, while the AMD chip has a TDP of 45 watts. Both processors use different sockets: Intel BGA 2049 for the Intel chip, AMD Socket FP8 for the AMD chip.

Memory support is the same in type (DDR5) and bus width (dual-channel), with identical memory bandwidth of 89.6 GB/s. Neither processor supports ECC memory. Both have locked multipliers.

The integrated graphics differ. The Intel Core Ultra 7 165H has an Arc Xe-LPG 128EU, while the AMD Ryzen 5 8645HS has a Radeon 760M. PCIe support differs as well: Intel offers Gen 5 with 8 lanes (CPU only), AMD offers Gen 4 with 20 lanes (CPU only).

Architecture Differences

The Intel Core Ultra 7 165H is built on Meteor Lake architecture, manufactured on Intel's 7 nm process. The AMD Ryzen 5 8645HS uses Zen 4 architecture, manufactured on TSMC's 4 nm process. The Intel chip comes from Intel's foundry, while the AMD chip comes from TSMC.

Cache configurations differ significantly. The Intel chip has 112 KB of L1 cache per core, 2 MB of L2 cache per core, and 24 MB of shared L3 cache. The AMD chip has 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 16 MB of shared L3 cache.

The AMD chip's transistor count is listed at 25,000 million, with a die size of 178 mm². The Intel chip does not have recorded transistor or die size data in the database.

The AMD Ryzen 5 8645HS has three part numbers listed, while the Intel chip has one. Both are mobile processors with active production status. The Intel chip launched on December 13, 2023, while the AMD chip launched on December 5, 2023.

Where Each One Wins

The Intel Core Ultra 7 165H is the pick for multi-threaded workloads. It wins every multi-core benchmark in the comparison, with margins ranging from 10.1% in Cinebench R23 multi-core to 64.9% in PassMark physics. Content creators, developers compiling code, and users running parallel simulations will see the largest benefit from the Intel chip's 16 cores and 22 threads.

The Intel chip also dominates math-heavy tasks. PassMark floating point math shows a 47.8% lead, and PassMark integer math shows a 23.1% lead. The 57.3% advantage in find prime numbers reinforces this pattern. For scientific computing, data analysis, or any workload that stresses arithmetic throughput, the Intel part is clearly ahead.

The AMD Ryzen 5 8645HS wins in single-threaded tests. It leads in Cinebench R15 single-core by 4.8% and in PassMark single-thread by 3.9%. The higher base clock of 4.30 GHz likely contributes to this advantage. Applications that rely on single-core performance, such as older games or lightly threaded productivity tools, will favor the AMD chip.

The AMD chip also wins in PassMark extended instructions by 13.5%. This suggests an advantage in workloads that use advanced instruction sets, such as cryptography, multimedia encoding, or specialized compute libraries.

The overall database picture shows Intel winning 11 benchmarks and AMD winning 4. The Intel chip's average score is 34083 versus 33244 for AMD. The percentile rankings are close, with Intel at 84 and AMD at 83. The verdict is workload-dependent: choose Intel for parallel processing and math, choose AMD for single-threaded responsiveness and extended instruction performance.