AMD Ryzen 9 PRO 8945HS vs AMD Ryzen AI 9 HX 375 Comparison

Head-to-Head Benchmarks

The head-to-head data reveals a split personality between these two mobile processors. The AMD Ryzen 9 PRO 8945HS wins 7 of the 15 recorded comparisons, while the AMD Ryzen AI 9 HX 375 takes 8. The margin of victory, however, varies dramatically by workload type.

The single-core results strongly favor the Ryzen 9 PRO 8945HS. In Cinebench R23 single-core, the 8945HS scores 3552 against 1988 for the AI 9 HX 375, a commanding 78.7% lead. Cinebench R15 single-core shows a similar story, with the 8945HS at 357 and the AI 9 HX 375 at 301, a 18.6% advantage. PassMark single-thread results are closer but still favor the 8945HS, 3920 versus 3867, a 1.4% margin.

Multi-core results tell a more complicated tale. The AI 9 HX 375 wins Cinebench R15 multi-core with 3334 against 2536, a 23.9% advantage. Yet the 8945HS wins Cinebench R23 multi-core with 25165 versus 21812, a 15.4% lead. The discrepancy between these two Cinebench versions suggests the workload scaling behaves differently across render sizes.

PassMark workloads split the pair nearly down the middle. The AI 9 HX 375 dominates in compute-heavy integer and floating-point tests. Floating-point math shows 75153 versus 63490, a 15.5% win for the AI 9 HX 375. Integer math delivers 121754 versus 103390, a 15.1% margin. Prime number finding gives the AI 9 HX 375 its largest PassMark win at 122 versus 91, a 25.4% gap. Physics performance also favors the AI 9 HX 375, 1819 versus 1430, a 21.4% lead.

Data compression favors the AI 9 HX 375 as well, 404918 versus 368884, an 8.9% margin. Extended instruction workloads go to the AI 9 HX 375 by 5.3%, 29269 versus 27714. The PassMark multi-thread score, a broad throughput measure, gives the AI 9 HX 375 a 7.7% win, 32916 versus 30378.

The 8945HS counters in several specific areas. Data encryption shows 21820 versus 20802, a 4.9% win. Random string sorting is nearly identical, with the 8945HS ahead by just 0.3%, 44668 versus 44552. The average benchmark score across all recorded tests places the AI 9 HX 375 ahead, 46030 versus 41963, a 9.7% difference in aggregate.

Percentile rankings place the AI 9 HX 375 at the 89th percentile of all CPUs, one point above the 8945HS at the 88th percentile. The nearest rivals confirm the competitive positioning. The 8945HS sits within 0.8% of the Intel Core i7-14700T, AMD Ryzen 5 7400, Intel Core i7-12850HX, and Intel Core 7 251TE. The AI 9 HX 375 trades places with the Intel Core Ultra 5 235, AMD EPYC 4364P, Intel Core i9-13900HX, and AMD EPYC 7303, all within 0.2%.

FAQ

Q: Which processor has the higher single-core Cinebench R23 score?

A: The AMD Ryzen 9 PRO 8945HS scores 3552, which is 78.7% higher than the AMD Ryzen AI 9 HX 375 at 1988.

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

A: The AMD Ryzen AI 9 HX 375 scores 32916, while the AMD Ryzen 9 PRO 8945HS scores 30378. The AI 9 HX 375 leads by 7.7%.

Q: Which chip wins in data compression workloads?

A: The AMD Ryzen AI 9 HX 375 delivers 404918 in PassMark data compression, beating the 8945HS at 368884 by 8.9%.

Q: What are the core and thread counts?

A: The AMD Ryzen 9 PRO 8945HS has 8 cores and 16 threads. The AMD Ryzen AI 9 HX 375 has 12 cores and 24 threads.

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 9 PRO 8945HS boosts to 5.20 GHz, while the AMD Ryzen AI 9 HX 375 boosts to 5.10 GHz.

Q: How do their average benchmark scores compare?

A: The AMD Ryzen AI 9 HX 375 has an average benchmark score of 46030, compared to 41963 for the AMD Ryzen 9 PRO 8945HS. The AI 9 HX 375 also holds a one-point higher percentile ranking at 89 versus 88.

The Verdict

The data indicates two distinct performance profiles. The AMD Ryzen 9 PRO 8945HS is the single-core specialist. Its Cinebench R23 single-core lead of 78.7% and Cinebench R15 single-core lead of 18.6% are the largest margins in either direction across the entire benchmark set. The 8945HS also wins data encryption by 4.9% and random string sorting by 0.3%.

The AMD Ryzen AI 9 HX 375 is the throughput champion. It wins the aggregate average score, 46030 versus 41963, and takes the majority of compute-heavy PassMark workloads. Its wins in integer math, floating-point math, physics, and prime number finding range from 15.1% to 25.4%. The AI 9 HX 375 also leads in Cinebench R15 multi-core by 23.9%.

The 8945HS holds a paradoxical position: it wins Cinebench R23 multi-core by 15.4% yet loses Cinebench R15 multi-core by 23.9%. The AI 9 HX 375 counters with more consistent multi-threaded PassMark performance, winning the multi-thread aggregate by 7.7%.

Users requiring maximum single-thread responsiveness and encryption throughput should favor the 8945HS. Users running mixed compute workloads, particularly those involving integer or floating-point math, physics simulation, or data compression, should favor the AI 9 HX 375. The percentile data places both in the top tier of mobile processors, with the AI 9 HX 375 one point higher at 89.

Specification Differences

The two processors diverge on nearly every core specification. The AMD Ryzen 9 PRO 8945HS uses 8 cores with 16 threads. The AMD Ryzen AI 9 HX 375 doubles the core count scaling with 12 cores and 24 threads.

Base clocks differ substantially. The 8945HS runs at 4.00 GHz base, while the AI 9 HX 375 sits at 2.00 GHz base. Boost clocks reverse the order: the 8945HS reaches 5.20 GHz, the AI 9 HX 375 reaches 5.10 GHz.

Thermal design power moves in the opposite direction. The 8945HS carries a 45 W TDP, the AI 9 HX 375 a 28 W TDP. Socket types also differ: the 8945HS uses AMD Socket FP7, the AI 9 HX 375 uses AMD Socket FP8.

Cache layouts show both shared and distinct features. Both have 1 MB L2 per core and 16 MB shared L3. The L1 cache differs, with the 8945HS at 64 KB per core and the AI 9 HX 375 at 80 KB per core.

Memory support varies. The 8945HS supports DDR5 only. The AI 9 HX 375 supports DDR5 and LPDDR5X. Both use dual-channel memory buses with 89.6 GB/s bandwidth. ECC memory support exists on the 8945HS but not on the AI 9 HX 375.

PCIe lane counts differ. The 8945HS provides Gen 4 with 20 CPU lanes. The AI 9 HX 375 provides Gen 4 with 16 CPU lanes. Integrated graphics differ as well, with the 8945HS using Radeon 780M and the AI 9 HX 375 using Radeon 890M.

Die size and transistor counts are not fully comparable. The 8945HS has 25,000 million transistors on a 178 mm² die. The AI 9 HX 375 has a 233 mm² die, with no transistor count recorded. Release dates place the 8945HS first at 2024-04-15 and the AI 9 HX 375 later at 2024-06-30.

Architecture Differences

The architectural split runs deeper than core counts. The AMD Ryzen 9 PRO 8945HS uses the Zen 4 architecture under the Hawk Point codename, part of the 8000 series. The AMD Ryzen AI 9 HX 375 uses Zen 5 with a hybrid Zen 5 / Zen 5c configuration under the Strix Point codename, part of the Ryzen AI 300 generation.

Both processors use a 4 nm process from TSMC. The manufacturing node is identical, which makes the performance differences attributable to architectural choices rather than process scaling.

The hybrid core design of the AI 9 HX 375 explains its lower base clock of 2.00 GHz. The 8945HS, using uniform Zen 4 cores, runs a 4.00 GHz base clock. The AI 9 HX 375 compensates with more cores and threads, 12 and 24 respectively, against 8 and 16 for the 8945HS.

The L1 cache difference reflects the architectural change. The AI 9 HX 375 allocates 80 KB per core, the 8945HS 64 KB per core. L2 remains 1 MB per core on both, and L3 stays at 16 MB shared on both.

The AI 9 HX 375 supports LPDDR5X in addition to DDR5, a feature absent from the 8945HS. ECC memory support appears only on the 8945HS, indicating a different intended deployment profile despite both being mobile parts.

PCIe lane allocation favors the 8945HS at 20 lanes versus 16, both Gen 4. The integrated graphics move from Radeon 780M on the 8945HS to Radeon 890M on the AI 9 HX 375. The die size grows from 178 mm² to 233 mm², reflecting the additional cores and the hybrid design.

Where Each One Wins

The AMD Ryzen 9 PRO 8945HS wins in single-thread responsiveness. Its Cinebench R23 single-core score of 3552 against 1988 is the defining gap of this comparison. The 18.6% Cinebench R15 single-core advantage reinforces this pattern. The 8945HS also wins PassMark single-thread by 1.4%, 3920 versus 3867, and data encryption by 4.9%, 21820 versus 20802. Random string sorting goes to the 8945HS by a narrow 0.3%.

The AMD Ryzen AI 9 HX 375 wins in multi-threaded and math-heavy workloads. Integer math delivers its strongest case, 121754 versus 103390, a 15.1% margin. Floating-point math follows at 75153 versus 63490, up 15.5%. Prime number finding shows a 25.4% lead, 122 versus 91. Physics performance goes to the AI 9 HX 375 by 21.4%, 1819 versus 1430. Data compression favors the AI 9 HX 375 by 8.9%, and extended instructions by 5.3%. The Cinebench R15 multi-core result goes to the AI 9 HX 375 by 23.9%, 3334 versus 2536.

The aggregate benchmark score favors the AI 9 HX 375, 46030 versus 41963. The higher percentile ranking, 89 versus 88, also belongs to the AI 9 HX 375. The 8945HS retains the higher boost clock at 5.20 GHz versus 5.10 GHz, but the AI 9 HX 375 operates at a lower 28 W TDP compared to 45 W.

The Cinebench R23 multi-core result complicates the narrative. The 8945HS wins this test by 15.4%, 25165 versus 21812, despite losing the R15 multi-core test. This suggests the 8945HS scales better in longer render workloads, while the AI 9 HX 375 excels in shorter bursts and in PassMark's math suites.

Workload selection matters more than raw core count. The 8945HS with 8 cores and 16 threads outperforms the 12-core, 24-thread AI 9 HX 375 in single-core and encryption tasks. The AI 9 HX 375 leverages its additional cores most effectively in integer, floating-point, and physics workloads. Neither processor dominates across all recorded tests.